Located above the surface of our planet is a complex mixture of gases and suspended liquid and solid particles known as the atmosphere. Operating within the atmosphere is a variety of processes we call weather. Some measurable variables associated with weather include air temperature, air pressure, humidity, wind, and precipitation. The atmosphere also contains organized phenomena that include things like tornadoes, thunderstorms, mid-latitude cyclones, hurricanes, and monsoons. Climate refers to the general pattern of weather for a region over specific period of time. Scientists have discovered that human activities can influence Earth’s climate and weather producing problems like global warming, ozone depletion, and acid precipitation.
Antarctic Ice: An 800,000 Year Record of Climate Change provides an extraordinary opportunity for scientists to reconstruct climate events of the past. Scientists have recently...
MeteorologyLast Updated on 2014-10-26 16:32:04
Meteorology is the scientific study of the atmosphere and physical processes of interaction with the Earth's crust, oceans and outer space. Meteorological phenomena are observable weather events which are investigated by the science of meteorology. The chief parameters comprised by the science of meteorology are: temperature, barometric pressure, humidity, sunlight and the gradients and interactions of each variable, as well as their temporal variability. The majority of Earth's observed weather is located in the troposphere. Different spatial scales are studied to determine how systems on local, regional, and global levels impact meteorological phenomena. Meteorology, climatology, atmospheric physics and atmospheric chemistry are sub-disciplines of the atmospheric sciences. Meteorology and hydrology compose the interdisciplinary field of hydrometeorology. Interactions... More »
ClimateLast Updated on 2014-10-01 10:48:54
Climate is the typical pattern of conditions of the earth’s atmosphere over a given region, as defined by factors such as temperature, air pressure. humidity, precipitation, sunlight, cloudiness, and winds. The World Meteorological Organization defines climate as "the statistical description in terms of the mean and variability of relevant quantities over a period of time," where an appropriate period is typically at least thirty years. Climate can be assessed at different, overlapping geographic regions. For example, Earth is thought to have a climate that is distinct from that of other planets, while different regions of Earth are also thought to have distinct climate types. Climate is often described as the "average" conditions; however, since daily and seasonal variability (including extremes) are critical determinants, using the term... More »
CloudsLast Updated on 2014-09-30 10:52:27A could is a visible aggregate of minute water droplets or ice particles in the atmosphere above the Earth's surface. Clouds are classified according to their height above and appearance (texture) from the ground.
Clouds form when air is cooled to its dewpoint—or the temperature at which, if the air is cooled, it reaches saturation with water. Air can reach saturation in a number of ways. The most common way is through lifting.
As a bubble or parcel of air rises it moves into an area of lower pressure (pressure decreases with height). As this occurs the parcel expands. This requires energy, or work, which takes heat away from the parcel. So as air rises it cools. This is called an adiabatic process.
The rate at which the parcel cools with increasing elevation is called the "lapse rate". The lapse rate of unsaturated air (air with relative humidity <100%)... More »
National Oceanic and Atmospheric Administration (NOAA), United StatesLast Updated on 2014-06-30 19:00:15
The National Oceanic and Atmospheric Administration (NOAA) is a federal agency within the United States Department of Commerce. As a science-based operational agency tasked with monitoring climate and changes in the environment, NOAA is responsible for the study of the atmosphere and the oceans. The agency issues daily weather forecasts and storm warnings, restores coastline, aids the flow of marine commerce, and manages fisheries. NOAA's activities facilitate weather- and climate-sensitive economic activity that account for roughly one-third of the country's gross domestic product (GDP). The agency also responds to natural and man-made maritime disasters, operates a complex network of oceanographic, meteorological and atmospheric data-collecting products and services, and manages marine mammals, marine endangered... More »
Miguasha National Park, Quebec, CanadaLast Updated on 2014-06-20 14:56:50Miguasha National Park is a paleontological site on the southern coast of the Gaspé peninsula in southeastern Québec, Canada, is considered the most outstanding fossil site in the world for its picture of the Devonian Period Age of Fishes. The Upper Devonian Escuminac Formation there, dating from 370 million years ago, contains five of the six fossil fish groups known from the period and the highest number and best-preserved fossils of the lobe-finned fishes that gave rise to the first four-legged, air-breathing terrestrial vertebrates, the tetrapods.
Miguasha National Park (Parc National de Miguasha) was inscribed on the World Heritage List under Natural criterion viii. in the year 1999. Its IUCN Management Category is designated as a National Park.
Canadian Taiga (1.2.3)
On the southern coast of the Gaspé peninsula in southeastern... More »
Drag and drop the content to change the order of featured content. The top nine will be displayed.