Global warming

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Sea temperature shows oscillations mainly driven by El Nino events and 11 year solar cycle.


May 9, 2010, 12:00 am
Oct 14, 2023, 8:50 am
Topics: Environmental Monitoring (main)

Greenhouse Gases (main)

The Climate Change Collection

Introduction

Average maximum USA temperature from 1900 to 2020
The phrase global warming refers to warming of the Earth's surface and lower atmosphere based upon worldwide temperature records; historical temperature records have only been maintained by humans since the 1880s. The term global warming generally was replaced by the term climate change, at about 2010, when it became evident that the outlook for a significant warming trend was not clear. Global temperature changes are the combined result of anthropogenic (human-caused) activities, mass migration to cities, which create increased energy use, deforestation, fuel combustion and slash and burn agriculture) as well as changes in volcanic activity, albedo change, orbital mechanics and solar irradiance. Recent global temperature trends indicate a gradual cooling based upon Arctic sea ice growth and troposphere data, East Antarctic Ice Sheet massive expansion, and a possible slight terrestrial warming based upon terrestrial data from the past 140 years. (Scott et al, 2003) Figure at right shows USA average maximum temperature from 1900 to 2020. Note that six decadal averages have exceeded the most recent decade temperature. While there is no clear trend, the most recent century is generally one of declining surface temperature maxima. Separate works by Zharkova and by Higgs (Higgs, 2018) demonstrate that the present (since circa 2012) and next decades (i.e. 2020-2050) are expected to be in global temperature decline. Studies have shown that changes in solar activity has driven climate over the whole Holocene period. (Mazza et al, 2021) High solar activity was the chief cause of the Medieval Warm Period, about 1000 AD, and the subsequent low levels of solar activity drove the subsequent cold period, called The Little Ice Age (1300–1850 AD). More recent time periods of analysis demonstrate the Earth temperature, measured by the most reliable metric of sea suface temperature in the tropics, shows that the entire oscillations from solar influence from 1960 to present, all explained by solar cycles; thus greenhouse gases have played little or no influence in global temperature for the last six decades. (Mazza, 2021) Other GWPF reports demonstrate that ocean and natural cycles,(Easterbrook, 2019) and not human activities, are behind most observed climate change.
New Zealand and Tasmania proxy temperature record over the last millennium. Source: Cook et al, 2002,
To view a longer-term perspective on terrestrial temperature records, one can view a 1000-year account of New Zealand and Tasmania temperatures, from one of the most detailed tree ring studies that span the last millennium. (Cook et al, 2002) As one can see, the millennium graph does not conclude a warming trend in the current period associated with greenhouse gas rise; in fact, there are at least seven prior decadal instances with higher temperatures than the prior century. Thus, the millennium record produces no evidence of a present global warming trend.
Global troposphere temperature record since 1957, showing no clear temperature trend. Source: Mazza & Canuto, 2021
Nor is there any basis for concluding that carbon dioxide emissions or any other greenhouse gas is producing a warming trend in the current era. The clearest basis for lack of warming are the tropospheric time graphs of global temperature, such as published by Mazza & Canuto (Mazza & Canuto, 2021), which demonstrate that there is no modern warming trend since 1957; this data set shows that the urban heat island effect is the artefact that explains the reported surface temperature modern rise, and that the tropospheric record is more reliable.
Global troposphere temperature record since 1957, showing no clear temperature trend. Source: Mazza & Canuto, 2021
According to the World Meteorological Organization (WMO), the decades from 1880 to 2000 experienced a terrestrial warming trend of about .6 degree Celsius. however, recent temperatures are declining and cooler than the Medieval Warm Period. There is consid erable evidence that global warming trends ceased and reversed to cooling over the last two decades. (NASA, 2018) For example the two-year period from 2016 to 2018 produced the coldest temperature decline in a century according to NASA. We also have extensive many years long studies of Arctic sea ice, indicating the Arctic ice expanse has grown massively in the last eight years. This would imply we should be trying to promote fossil fuel use to prevent global cooling, which has been a much more detrimental factor in human civilization, as demonstrated by the Medieval Warm Period and the Roman Warm Period, which were high points of human health, crop production and flourishing of civilisation.

As Darby and many other physicists have noted, there is simply no cogent data that suggest carbon dioxide emissions are a significant factor in temperature changes for the prior or next century. (Darby, 2024) In fact, the initiatives that a number of nations are taking to reduce carbon dioxide are destined to be gigantic expenditures leading to no significant impact on global temperature change or climate.

However, the most reliable measure of Earth temperature change is ocean temperature, since terrestrial measures are subject to biases from the urban heat island effect, whereby many of the global temperature sensors are steadily being encroached upon by urbanization. Using proxy methods covering both the Atlantic and Pacific Oceans, it has been found that the recent trend in the last 9000 years is one of steady ocean cooling; this effect has been attributed partially to the melting of polar ice, creating cooler oceans. The trend has continued through the Industral Revolution and into the current era. (Rashid & Polyak, 2011) This current long term ocean cooling amounts to approximately 1.5 degrees Celsius, and may also be affected by solar and orbital cycles producing the greater, approximately 60,000 year global cooling cycle that we are presently in.

The United States National Climatic Data Center (NCDC), found that: i

  • surface temperatures tied with 2003 as the seventh warmest since the 1880s, at 0.77°C (1.39°F) above the 20th century average.

The NOAA Lower Troposphere Temperature data for 2021 states:

  • The global temperature declined by 0.5 degrees C in recent years
  • North America, Europe, Asia and most of the oceanic troposphere participated in this notable cooling
  • Note however that during the past century, global surface temperatures increased at a rate near 0.05°C/decade
There is no evidence of hurricane frequency or intensity change since records began to be kept in 1851 according to NOAA; in fact, there appears to be a slight decline in such hurricane activity, indicating no influence of global warming or climate change is operative in adverse hurricane trends. Correspondingly, there is no evidence for any increase in global flood intensity or frequency over the last several centuries; in fact, there is a trend of fewer deaths per annum due to flooding. That mortality reduction may be partially attributed to increased levels of disaster preparedness in underdeveloped countries. Moreover, there is no evidence that the slight increase in global temperatures at present has caused any change in drought severity or duration; in fact, precipitation patterns last attained megadrought status in Medieval times. Droughts in the last five centuries have generally been of less severity and duration than centuries or millennia ago and are therefore unrelated to global warming. (NSF, 2021). Most animal species benefit from small increases in surface temperature; for example, there are presently more human deaths in the world from freezing that from heat. Note also that bird deaths are decreased with global warming.
Historic North America hurricanes from complete NOAA data commencing 1851, showing no increase of hurricane frequency, and possibly a slight temporal decline. Source: US NOAA

From a review of 11,944 scientific papers reviewed, the following consensus was revealed: only 0.3 % of the research concluded that humans are responsible for most of the warming of the Earth since 1950; 32.4% of the research concluded that mankind is responsible for some of the Earth warming of the recent century. As a practical matter the majority of the research had no opinion as to whether human activity has had any impact on Earth temperature change in the last century. (Cook, 2013)

Longer Time Perspective

The Earth commenced a major warming trend at the beginning of the Holocene Period, about ten thousand years before present; this temperature trend led to glacial melt over a massive scale and allowed human habitation and farming over a very large portion of extreme latitudes that were previously uninhabitable by humans. This mega trend has generally endured until present time. In the Roman Era another warming trend developed from purely natural causes, resulting in diminished agriculture in the Sahara region. From 950 AD to 1250 AD another period of natural global warming occurred, which was most well documented in the northern hemisphere (Mann et al, 2009); this warming period is often referred to as the Climate Optimum, in contrast to the subsequent naturally occurring Little Ice Age, which induced millions of human deaths, due to diminished agricultural production and freezing temperatures, as well as cooler climate acceleration of plague.

The global warming of the Eemian had a profound effect on the ability of humans to endure. Neanderthals, who were more suited to survive freezing weather, began to decline, leading to their extinction not long after the Eemian, whereas humans flourished, since they required higher temperatures for health and diminished mortality.

A more dramatic earlier warming period is known as the Late Paleocene Thermal Maximum, which occurred about 55 million years before present. Apparently, deep-sea temperatures were warming gradually when methane hydrates (ice containing CH4) in seafloor sediments melted and belched massive amounts of CH4 into the atmosphere, causing a massive greenhouse forcing event and greatly elevated temperatures, beyond those of the Roman Warming Period, Medieval Warm Period or present.

It is important to observe that there is no correlation of global warming to incidents of drought, flooding, hurricanes or other extreme weather events. There are numerous examples of ancient drought conditions; some of these, such as the Danger Cave Native American site in Utah, are based upon stalagmite studies do document time history of droughts. The Great Basin Desert Culture peoples of Danger Cave prospered over a period dating to at least as early as 7000 BC. Their ability to adapt to megadroughts is evident from their cultural remains in this important site. Stalagmite data shows that the most prolonged drought in the Great Basin since the start of the Holocene lasted for thousands of years, surpassing the minor droughts of current time and even the last five centuries. (Snow, 2011)

Another proxy ancient drought study at Lake Tahoe in California demonstrates that the era of greatest megadroughts occurred in the mid-Holocene, applying data from submerged preserved ancient tree stumps. (Lindström, 1990) This drought, of course, was before any increase in carbon dioxide starting in the Industrial Revolution.

Similar findings of megadroughts are observed in Europe and West Asia. Generally, droughts have been correlated with periods of global cooling. Tree ring studies show that the most severe modern droughts are associated with the time periods circa 1315 AD (chiefly West Asia and northeast Mediterranean); 1540 AD (central Europe); 1616 AD (central Europe); 1741 AD (northern Europe, Scandinavia, British Isles); 1893 AD (northern and western Europe); 1921 AD (western Europe). In summary, there is no correlation in Europe and West Asia between anthropogenic forcing, industrial activity, greenhouse gases and drought.

Some of the earliest megadrouhts have been documented in Europe utilizing proxy methods of ancient lakebed sampling cores. Example periods where megadroughts occurred much more severe than industrial era events were found in the Younger Dryas period (10,500 to 9500 BC) and during the Period 15,600 to 14,200 BC. (Vegas et al, 2010). It is notable that these two monumental drought eras occurred during cold periods, and clearly were not related to any period of elevated greenhouse gasses or carbon dioxide.

Recent Trends in Sea Ice Growth

Recent trends in Arctic sea ice, showing major increase in ice cover from 2012 to 2021. Source: U.S. National Snow & Ice Data Center.
From the year 2012 to 2021 there is a trend of expanding sea ice as measured by satellite data. The main benchmark index used to establish this trend is the minimum sea ice cover at the end of the summer season. (National Snow and Ice Data Center, 2021)

In a more specific localised study an eight month time series of hydrographic properties was measured in the vicinity of the South Orkney Islands, Southern Ocean, by tagging a southern elephant seal (Mirounga leonine) on Signy Island with a Conductivity-Temperature-Depth/Satellite-Relay Data Logger (CTD-SRDL) in 2007. Such a time series (including data from the austral autumn and winter) would have been difficult to obtain via other methods, and it illustrates with unprecedented temporal resolution the seasonal progression of upper-ocean water mass properties and stratification at this location. Sea ice production values of around 0.15-0.4 metre per month for April to July were inferred from the progression of salinity, with significant levels still in September (around 0.2 metre per month. However, these values presume that advective processes have negligible effect on the salinity changes observed locally. The impact of such advective effects is illustrated by contrasting the observed hydrographic series with the output of a one-dimensional model of the upper-ocean forced with local fluxes. It is found that the difference in magnitude between local (modelled) and regional (inferred) ice production is significant, with estimates differing by around a factor of two. A halo of markedly low sea ice concentration around the South Orkneys during the austral winter offers at least a partial explanation for this, since it enabled stronger atmosphere/ocean fluxes to persist and hence stronger ice production to prevail locally compared with the upstream region. The year of data collection was an El Nino year, and it is established that this phenomenon can impact strongly on the surface ocean and ice field in this sector of the Southern Ocean. (Meredith et al, 2011)

Bias of Urban Heat Island Effect on Temperature Measurement

There is a known bias of worldwide temperature measurement, which is causing the measured rise in surface temperature to be overstated. This effect is known as the urban heat island. The bias began when most of the temperature sensors were installed between 1880 and 1955. The majority of those snsors were placed in suburban or rural locations at the edge of cities. At present time the majority of those sensors are now in urban heat islands, which are known to exaggerate surface temperatures, due to large amounts of pavement, urban deforestation, and presence of overt heat sources such as vehicles, heaters and air conditioners. Thus, the stated values of temperature rise over the last several decades may be greatly exaggerated. In fact, there are numerous known instances, where an active heat source (such as proximity to aircraft warmup, adjacency to air conditioner vent, or even proximity to open burning device: has been positioned newly to one of the grid thermal sensors. IN many of those cases the documented rise of one degree or so has been documented to arise immediately after the installation of the new heat source close to the sensor (typically within two to five meters of such source). Conversely, ice melting increases albedo, due to reduction of highly reflective ice surfaces; however, this effect is rather small, since area of surface ice changes relatively little compared to ice volume reduction.

A larger albedo effect comes from deforestation, which is a major source of carbon dioxide and water vapor additions to the atmosphere. While the net environmental damage of deforestation is quite negative, the results lead to pronounced higher albedo on the resulting landscape and a substantial negative feedback loop for global temperature increases.

Feedback loops

There are a number of feedback loops that mitigate temperature variations with natural consequences. A significant loop pertains to the melting of glaciers, ice sheets and polar ice. To the extent melting is occurring, colder meltwater serves to decrease surface ocean temperatures, reducing global temperatures overall. Bronselaer et al. (2018) have calculated that this effect may cool the Earth's oceans by about 0.4 degrees C between now and 2100, thereby obliterating most of any projected warming attributed to greenhouse gases and deforestation. Note that this ocean cooling effect is difficult to circumscribe, since many of the Earth's ice sheets and glaciers are advancing, not retreating; notably, the massive Eastern Antarctic Ice Sheet, most Himalayan glaciers, and many Argentine and Chilean glaciers are advancing.

Most modeling studies have aimed at predicting the consequences of the decline in the rate of calcification on the global carbon cycle and its feedback on atmospheric (Atmospheric composition and structure) CO2. This is not an easy task because two opposite feedbacks are involved. First, calcification is a source of CO2:

Ca2+ + 2HCO3- → CaCO3 + CO2 + H2O

hence a decline in calcification is a negative feedback on atmospheric CO2. The magnitude of this feedback is poorly known because future changes in calcification are poorly understood due to biological variability, very limited data on interaction between pCO2 and other parameters which will also change (e.g., temperature, nutrient and light), and potential remediation by acclimation processes by organisms. Second, the CO2 generated by calcification is a function of pCO2. The calcification equation above is correct in freshwater (Freshwater biomes) but the current ration of CO2 generated per mole of CaCO3 precipitated is about 0.6 in 'standard' seawater and will increase as seawater pCO2 will increase.

An important feedback loop that related ice melt to sea level rise is the phenomenon of Isostatic Rebound, in which the earth surface in some coastal areas may rise as glaciers melt, so that an effective decline in sea level results from the ice melting.

Another negative feedback loop that inherently regulates Earth temperature is the Boreal tree-line movement. Studies in northern Russia (MacDonald et al, 2000), Canada and Scandinavia using proxy methods have shown that the tree-line steadily advanced (i.e. creation of more forest) in periods of temperature increase during the Holocene; this paleoclimate oscillation, of course, expanded the carbon sink, tending to depress temperatures. In particular, atmospheric CO2 and oxygen data confirm that the terrestrial biosphere became a net carbon sink in the 1990s;(Schimel et al, 2001) this transition can explain why a global cooling trend began in the early 21st century as evidenced by expanding Arctic sea ice (National Snow and Ice Data Center, 2021), and some of the coldest temperatures in the last century occurring in 2019 and 2021.

Causes of Global Temperature Change

The IPCC Fourth Assessment Report states that the Earth has warmed in recent times; however, this assertion was chiefly based on the Mann studies which grafted proxy data to instrument data, and which have since been discredited.

As with every environmental variable, there are multiple factors that contribute to the "warmth" of the Earth. Humans measure warmth as temperature which is a measure of the amount of heat contained in a physical object. One can envision this concept by thinking of a pot on a stove. As heat is applied to the pot from a flame or heating element, the temperature of the pot will increase. But heat will also begin escaping the pot in the form of steam and also through radiative and convective cooling from the top and the sides of the pot. Eventually the rates of both heat loss (cooling) and heat gain (warming) may stabilize and the heat then contained within the pot at an instantaneous point of time would be reflected in an equilibrium temperature. This equilibrium temperature could be measured directly but it also could be calculated by determining all of the flux rates of heat entering (heating) and leaving (cooling) the pot.

One way that climate scientists look at the warmth of the Earth's climate system is to calculate the annual average temperature of the surface of the Earth using temperature measurements systematically collected throughout the year from thousands of land- and ocean-based weather and observation stations. The observed trends in the Earth's annual average temperature is one of the factors leading to the scientific conclusion that the Earth is now in a period of global warming.; however, the geological record indicates the Earth has generally been in an era of warming throughout the Holocene, i.e. the last ten thousand years.

To attempt to answer why the Earth slightly warmed during the twentieth century, scientists have conducted accountings of each of the fluxes of heat into (warming) and out of (cooling) the Earth's climate system. Since the measured data show that annual average temperatures of the Earth had been increasing in most of the twentieth century, the year-to-year annual flux of heat into the climate system must have been greater than the annual flux of heat out of the system. By accounting for each of the fluxes of heat into and out of the system, scientists are able to assess which fluxes and processes are contributing to net annual warming of the Earth's surface. By conducting such accountings, scientists are able to quantify the influence that each natural and human factor has in altering the balance of incoming and outgoing energy in the Earth-atmosphere system and can calculate an index of the importance of each of the factor as a potential climate change mechanism. Each of the factors are called climate drivers and the relative impact or index of each factor's importance to climate change is called its radiative forcing. Note that in the Radiative Forcing graphic that CO2 contributions consist of approximately one half naturally occurring from animal and soil respiration, with the greatest growth factor being the human population explosion.

Relative importance of climate drivers to current global warming as determined by the 4th Assessment of the IPCC. (Source: IPCC)

In completing such an assessment, the IPCC has stated that the globally averaged net effect of human activities from 1750 to 2000 had been one of warming. The scientists found that the combined radiative forcing due to increases in nitrogen trifluoride, carbon dioxide, methane, and nitrous oxide was a possible climate driver and its rate of increase during the industrial era is a component of forcing. However, nitrogen trifluoride is a more potent greenhouse gas (chiefly resulting from manufacture of solar panels) and is increasing in the atmosphere at a much higher rate than carbon dioxide. Thus, massive expansion of solar power is a ticking time bomb, that could lead to centuries of climate forcing.

The IPCC also found that some anthropogenic contributions to aerosols and black carbon particulate in the atmosphere produce cooling effects, referred to as global dimming.

Significant anthropogenic contributions to radiative forcing were also found to have come from several other sources, including tropospheric ozone changes due to emissions of ozone-forming chemicals, direct radiative forcing due to changes in halocarbons, and changes in surface albedo, due to land-cover changes and deposition of black carbon aerosols on snow. However the impacts of each of these factors was relatively small compared to the impacts of deforestation and anthropogenic greenhouse gases (each showing relative impacts of 15% or less relative to the greenhouse gas forcings). Finally, an increase in solar irradiance since 1750 was estimated to have caused a forcing that contributed to the recent warming of the Earth.

Correlation with Historic Disease

Historical data indicates that global cooling rather than global warming is correlated with major disease outbreaks. For example, the massive Justinian Plague is closely linked to the known global cooling event that began in 536 AD (Mulholland, 2021). In the Little Ice Age commencing in the Late Medieval Period, there was prolonged disease and plague, especially well documented in Europe.

The Justinianic Plague was the first pandemic plague in recorded world history, commencing in the Dark Ages; this contagious disease is caused by the bacterium Yersinia pestis. The disease afflicted the entire Mediterranean Basin, Europe, and the Near East, severely affecting the Sasanian Empire and the Byzantine Empire and its capital, Constantinople.(Arrizabalaga, 2010) The plague is named for the Byzantine Emperor Justinian I (reigned 527–565 AD) who, according to the historian Procopius, contracted the disease at the height of the pandemic which killed about a twenty percent of the population in the imperial capital.  The contagion arrived in Roman Egypt in 541 AD, spread around the Mediterranean Sea and persisted throughout Northern Europe and the Arabian Peninsula, until 549 AD.

Scientists confirmed that the cause of the plague of Justinian was Yersinia pestis, the same bacterium responsible for the Black Death  during the Little Ice Age (1347–1351 AD). (Stathakopoulos, 2018) Ancient and modern Yersinia pestis strains closely relate to the ancestor of the Justinian plague strain have been found in the Tian Shan, a system of mountain ranges on the borders of Kyrgyzstan, Kazakhstan, and China, suggesting that the Justinian plague originated in that Asian region

In addition to disease deaths, there is considerable data demostrating that Mortality from Thermal Extremes is much greater due to excessive cold rather than excessive heat; at least 300,000 excess deaths per annum are due to cold versus heat.(Lomborg, 2021) In any case there is a strong correlation of civilisation decline with onset of cooling periods, such as the decline of the Mayan civilisation, onset of the European Dark Age and decline of the ancient Benhoarita society as evidenced by the Cueva de El Tendal archaeological site.


Correlation with Economic Outcomes

As clearly demonstrated by the Roman Warm Period and Medieval Warm Period historic warm periods are eras of economic prosperity as well as high crop yields; conversely, the cold periods of the Dark Ages and Little Ice Age were not only times of high mortality, but also poor economic performance. The more recent period has been analyzed by numerous scientists, including Lomberg and also Barker, (Barker, 2023) to find that the slight warming of the modern period is not associated with economic harm, but rather economic progress. Barker's work clearly debunked faulty work of Dell, who refused to respond to Barker's work.

Correlation with Historic Warfare

Looking back two millennia, there are some surprising correlations of times of peak warfare in human civilisation with climate factors. The most comprehensive analysis is from Chiotis (2018). with special attention on the most recent 1000 years of recorded history. That work found that warfare and aggression peaked in the period 1300 to 1600 AD, prior to the Industrial Revolution. This epoch was marked by extreme cold, accompanied by widespread crop failure and human disease. The chief geographic regions cited were Europe and also East Anatolia. Working hypotheses are that the cold temperatures and crop deficiencies led to extraordinary aggressions. Another example, not noted in the Chiotis work was the most savage warfare seen in European history, in which the Ottoman Empire attacked the sovereign country of Romania in a prolonged fashion during the 15th century AD. That aggression was returned by Vlad the Impaler, who responded with equal barbaric tactics. Bloody warfare and revolt are also attributed to the global cooling of the Little Ice Age in ending China's Ming Dynasty. The driving force of this warfare and Manchu invasion was seen to be crop failure associated with pronounced cooling, that led to famine, peasant revolt and subsequent warfare. (Zheng et al, 2014) An earlier example occurred in the beginning of the Dark Ages, also a period of increasing prolonged cold, combined with crop failures and disease. In that period the Northern European Goths overran the Roman Empire.


See Also

References

  • Arrizabalaga, Jon (2010), Bjork, Robert E. (ed.), "plague and epidemics", The Oxford Dictionary of the Middle Ages, Oxford University Press, doi:10.1093/acref/9780198662624.001.0001, ISBN 
  • David Barker (Oct 12, 2023) Climate Change and ‘Poor’ South Korea Wall Street Journal, New York, NY
  • Ed Cook. (2001) North American Drought Atlas. National Science Foundation, Division of Atmospheric Sciences, Paleoclimate Program, SGER Award ATM 03-22403
Global-temp-through-2009a 438x0 scale.jpg
* Eustathios Chiotis. ed. (2018) Climate Changes in the Holocene: Impacts and Human Adaptation. ISBN:9781351260237, 418 pages. CRC Press
  • Snow, Dean R. (2010). Archaeology of Native North America. Upper Saddle River, NJ: Prentice Hall. p. 80
  • Stathakopoulos, Dionysios (2018), "Plague, Justinianic (Early Medieval Pandemic)", The Oxford Dictionary of Late Antiquity, Oxford University Press, doi:10.1093/acref/9780198662778.001.0001, ISBN
  • Daniele Mazza and Enrico Canuto (2021) Evidence of solar 11-year cycle from Sea Surface Temperature (SST, Academia Letters. 8 Pages, https://doi.org/10.20935/AL3023
  • Mulholland, B. (2021). Can archaeology inform the climate change debate? Academia Letters, Article4385.  https://doi.org/10.20935/AL4385.
  • O. Pereira (2021) Academia Letters
  • Paul Vossen. (2019) Strong La Niña conditions drove medieval droughts. Science, 31 Dec, 2019
  • Freedman, Andrew (5 July 2011). "New study blames 10-year lull in global warming on China coal use, air pollution". Washington Post. Archived from the original on 16 July 2017. Retrieved 29 October 2018.Stan Kaplan (2010) Displacing Coal with Generation from Existing Natural Gas Fired Power Plants. Congressional Research Service. Washington DC
  • Investors Business Daily (2018) Don't Tell Anyone, But We Just Had Two Years Of Record-Breaking Global Cooling{ Based upon a NASA Study
  • Bjorn Lomborg (July 21, 2021) More people die of cold: Media’s heat-death climate obsession leads to lousy fixes. New York Post. https://nypost.com/2021/07/14/more-die-of-cold-medias-heat-death-climate-obsession-leads-to-lousy-fixes/
  • H. S. Sharm, ed. (2007). Neurobiology of Hyperthermia (1st ed.). Elsevier. pp. 175–177, 485. ISBN 9780080549996. Retrieved November 19, 2016
  • U. Büntgen, W. Tegel, K. Nicolussi, M. McCormick, D. Frank, V. Trouet, J. O. Kaplan, F. Herzig, K.-U. Heussner, H. Wanner, J. Luterbacher, J. Esper, 2500 years of European climate variability and human susceptibility. Science 331, 578–582 (2011).
  • R. J. Cooper, T. M. Melvin, I. Tyers, R. J. S. Wilson, K. R. Briffa, A tree-ring reconstruction of East Anglian (UK) hydroclimate variability over the last millennium. Clim. Dyn. 40, 1019–1039 (2013).wkins, E., and R. Sutton (2009) The potential to narrow uncertainty in regional climate predictions. Bull. Amer. Meteor. Soc., 90, 1095–1107
  • Malcolm K Hughes & Peter M Brown (1992) Drought frequency in central California since 101 B.C. recorded in giant sequoia tree rings. Climate Dynamics volume 6, pages161–167
  • Matkin, (2021) Leading scientists including 60 Nobel winners, doubt trace amounts of Co2 emissions cause over heated climate. New Research shows "extreme value of CO2 to all life forms, but no role in any change of the Earth’s climate." Alarmism "statistically questionable.". Academia Letters. 319 Pages
  • James Matkin (2021) LIttle Ice Age was global and may be back says new research - China, NZ, Pacific Islands, Tasmania - demolishes Mann's HOCKEY STICK CHART. Natural factors are substantially more powerful in climate variation than human activity. Academia Letters. 157 Pages
  • Daniele Mazza, Politecnico di Torino, Enrico Canuto (2021) Evidence of solar 11-year cycle from Sea SurfaceTemperature (SST). ACADEMIA  Letters
  • Daniele Mazza (2021) Evidence of 11-Year Solar Cycles from Sea Surface Temperature Academia Letters. https://mail.google.com/mail/u/0/#inbox/WhctKKZWgfTTNZwKbLjjlszNMPNGstptwWLCrZlKrwrFcQQdvHHKNZnrKmBBFxgcVnMDQwbiele
  • Meredith, Michael P. , Nicholls, Keith W. , Renfrew, Ian A., Boehme, Lars, Biuw, Martin, Fedak, Mike (2011) [htietps://www.bas.ac.uk/data/our-data/publication/seasonal-https://www.bas.ac.uk/data/our-data/publication/seasonal-evolution-of-the-upper-ocean-adjacent-to-the-south-orkney/ Seasonal evolution of the upper-ocean adjacent to the South Orkney Islands, Southern Ocean: results from a “lazy biological mooring”]. British Antarctic Survey. Natural Environment Research Council
  • Schimel, D.S., J.I. House, K. A. Hibbard, P. Bousquet, P. Ciais, P. Peylin, B.H. Braswell, M.J. Apps, D. Baker, A. Bondeau, J. Canadell, G. Churkina, W. Cramer, A.S. Denning, C.B. Field, P. Friedlingstein, C. Goodale, M. Heimann, R. A. Houghton and J. Melillo, 2001. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature, 414:169–173.
  • Harunur Rashid and Leonid Polyak (2011) Abrupt Climate Change Revisited.  Byrd Polar Research Center, Ohio State University, Columbus, Ohio, USA
  • U.S. National Snow and Ice Data Center (2021) Arctic Sea Ice News and Analysis
  • NOAA 2021 Annual Global Climate Report https://www.ncdc.noaa.gov/temp-and-precip/global-maps/
  • 2009 Annual Report of the United States National Climatic Data Center (NCDC)
  • Assessment of International Urban Heat Island Research" (PDF). U.S. Department of Energy Report. Navigant Consulting. Retrieved 30 April 2014.
  • I. Camilloni & V. Barros (1997). "On the urban heat island effect dependence on temperature trends". Climatic Change37 (4): 665–681. doi:10.1023/A:100534152
  • Hansen; R. Ruedy; M. Sato; M. Imhoff; W. Lawrence; D. Easterling; T. Peterson & T. Karl (2001). "A closer look at United States and global surface temperature change". Journal of Geophysical Research106 (D20): 239–247. Bibcode:2001JGR...10623947H. doi:10.1029/2001JD000354. 
  • MacDonald, G.M., A.A.Velichko, C.V. Kremenetski, O.K. Borisova, A.A. Goleva, A.A. Andreev, L.C. Cwynar, R.T. Riding, S.L. Forman, T.W.D. Edwards, R. Aravena, D. Hammarlund, J.M. Szeicz and V.N. Gattaulin, 2000. Holocene treeline history and climate change across Northern Eurasia. Quaternary Research, 53:302–311. 
  • Antarctic climate and environment history in the pre-instrumental period. (2021) Editors: Luca Bargelloni, John Turner et al. Victoire Press. Cambridge, UK. Published by the Scientific Committee on Antarctic Research. Scott Polar Research Institute, Lensfield Road,Cambridge, UK. ISBN 978-0-948277-22-1 
  • Anthony Watts (2007) Earth's Albedo Tells and Interesting Story" https://wattsupwiththat.com/2007/10/17/earths-albedo-tells-a-interesting-story/  3032. S2CID 151236016.
  • Evaluation of Spatial and Temporal Distribution Changes of LST Using Landsat Images (Case Study:Tehran) H. Kachar a*, A. R. Vafsian b , M. Modiri c , H. Enayati a , A. R. Safdari Nezhad a a K.N. Toosi university of Technology, Faculty of Geodesy and Geomatics Eng, Mirdamad Cross, Tehran, Iran - (hamedkachar, Enayati_hamid, Safdari.Nezhad)@yahoo.com b Tabriz University, Civil Engineering Faculty, Tabriz, Iran - a.vafsian@gmail.com c Malek Ashtar University of Technology, Dept. of Geomatic Engineering, Lavizan Street, Tehran, Iran - mmodiri@ut.ac.ir
  • Climate 2007: IPCC Fourth Assessment Report
  • Li, H.; Ku, T. (2002). "Little Ice Age and Medieval Warm Periods in Eastern China as Read from the Speleothem Records". AGU Fall Meeting Abstracts71: 71C–09. Bibcode:2002AGUFMPP71C..09L
  • Higgs, Roger. (2018). Proof that the sun, not CO2, drives Earth's climate. https://www.researchgate.net/publication/325805849_Proof_that_the_sun_not_CO2_drives_Earth's_climate
  • Mann, M. E.; Zhang, Z.; Rutherford, S.; et al. (2009). "Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly"(PDF). Science326 (5957): 1256–60. Bibcode:2009Sci...326.1256M. doi:10.1126/science.1177303. PMID 19965474. S2CID 18655276.
  • Myrup, Leonard O. (1969). "A Numerical Model of the Urban Heat Island". Journal of Applied Meteorology8 (6): 908–918. Bibcode:1969JApMe...8..908M. doi:10.1175/1520-0450(1969)008<0908:ANMOTU>2.0.CO;2,
  • National Science Foundation, C. Michael Hogan (2021) Drought and Flooding, Encyclopedia of Earth, National Council for Science and Environment, Washington DC.
  • Louis Scott, Julia Lee-Thorp, Karin Holmgren {2003} Persistent millennial-scale climatic variability over the past 25,000 years in Southern Africa. Quaternary Science Reviews. 16 Pages
  • Juana Vegas et al. (2010) Identification of arid phases during the last 50 cal. ka BP from the Fuentillejo maar-lacustrine record (Campo de Calatrava Volcanic Field, Spain, Journal of Quaternary Science. https://www.academia.edu/7201034/Identification_of_arid_phases_during_the_last_50_cal_ka_BP_from_the_Fuentillejo_maar_lacustrine_record_Campo_de_Calatrava_Volcanic_Field_Spain?email_work_card=abstract-read-more
  • World Meteorological Organization. December 8, 2009 Press Release.
  • Persistent millennial-scale climatic variability over the past 25,000 years in Southern Africa. 2003, Quaternary Science. 16 PagesZ
  • C. Zhao (2011) Impacts of urbanization on climate change, 10,000 Scientific Difficult Problems: Earth Science (in Chinese), 10,000 scientific difficult problems Earth Science Committee Eds, 2011, Science Press, pp. 843–846
  • Bronselaer, B. et al. (2018) Change in future climate due to Antarctic meltwater, Nature, doi:s41586-018-0712-z
  • Jingyun Zheng, Lingbo Xiao, Xiuqi Fang, Zhixin Hao, Quansheng Ge, Beibei L (2014) How climate change impacted the collapse of the Ming dynasty. Climatic Change, November 2014, Volume 127,Issue 2, pp 169–182

Citation

Stephen Nodvin and C. Michael Hogan (2013, updated 2023). Global warming. ed. Kevin Vranes. Encyclopedia of Earth. National Council for Science and Environment, Washington DC. Retrieved from http://editors.eol.org/eoearth/wiki/Global_warming