Meteorology is a sub-discipline of the broader field of knowledge known as atmospheric sciences. The purpose of the science of meteorology is to understand the processes and phenomena that make up our planet’s weather. From this understanding, meteorologists are able to generate short-term weather forecasts using current climate information, software and powerful computers. Weather forecasts are very important as they help us plan the various social and economic aspects of our lives. Modification of the software used in weather forecasting has allowed scientists to build models for understanding the climate of the Earth’s past. These models can also be used to make predictions about the future of our planet’s weather and climate under the scenario of global warming.
NOAA 2011 Atlantic Hurricane
The 2011 Atlantic hurricane season outlook is an official product of the National Oceanic and Atmospheric Administration...
AERMOD Last Updated on 2013-10-05 15:00:30AERMOD is the latest generation air dispersion model designed for short-range (up to 50 kilometers) dispersion of air pollutant emissions from stationary industrial sources. It is a steady-state plume model incorporating dispersion based on planetary boundary layer (PBL) turbulence structure and scaling, and it accomodates surface and elevated emission sources as well as simple or complex terrain.
As of December 9, 2005, the U.S. EPA designated AERMOD as the preferred model to be used for compliance with any federal and state air pollution dispersion modeling requirements. As of November 9, 2006, AERMOD completely replaces the previous preferred model known as the Industrial Source Complex (ISC) model.
The AERMOD system integrates three modules:
A steady-state Gaussian dispersion model designed for short-range dispersion of continuous emissions from stationary... More »
National Center for Atmospheric ResearchLast Updated on 2013-08-21 02:53:16The National Center for Atmospheric Research (NCAR) is a non-governmental institute, based in the United States, whose stated mission is "exploring and understanding our atmosphere and its interactions with the Sun, the oceans, the biosphere, and human society."
NCAR's flagship Mesa Laboratory is located in the outskirts of Boulder, Colorado, in a dramatic complex of buildings designed by the renowned architect I. M. Pei. The site is maintained as a nature preserve.
The Mesa Laboratory includes science exhibits, an educational resource center, a library, and art galleries all of which open to the general public.
NCAR is headquartered in Boulder, Colorado, with most activity taking place on three campuses:
NCAR Mesa Laboratory: in the southwest outskirts of Boulder Foothills
Laboratory and Center Green Campus: in northeast Boulder Research
Aviation Facility: at... More »
Nonpoint sourceLast Updated on 2013-05-23 00:00:00
A nonpoint source refers to a source of pollution from an origin other than a well defined point. The term is most often applied to air pollution, water pollution and noise pollution. Nonpoint pollution sources may be classified as either line sources, area sources, or less frequently as volume sources. The classic line source is a linear highway, which produces both air pollution and noise pollution. A classic area source is a parcel of land, which produces water pollution in the form of surface runoff containing excessive amounts of nitrates, phosphates, pesticides and herbicides.
The attention to nonpoint sources was heightened, when researchers realized that most human exposure to air and noise pollution derived from nonpoint sources. In the case of noise pollution, over ninety percent of environmental noise exposure worldwide arises from line sources .Less commonly,... More »
DerechoLast Updated on 2012-07-25 00:00:00
Two types of derecho may be distinguished based largely on the organization and behavior of the associated derecho-producing convective system. The type of derecho most often encountered during the spring and fall is a serial derecho. The second type is a progressive derecho, associated with a relatively short line of thunderstorms.
Derechos are widespread, long-lived windstorms associated with a band of rapidly moving showers or thunderstorms. Coined by Dr. Gustavus Hinrichs in 1888, "derechos", a Spanish word which means "direct" or "straight ahead".
Although a derecho's strength can produce destruction similar to tornadoes, the damage pattern produced by these events will occur along relatively straight lines. Thus the term, straight-line wind damage.
Derechos are produced by a family of downbursts clusters. Downburst... More »
Less rainfall for drought-sensitive Southern Hemisphere regions?Last Updated on 2012-05-18 00:00:00
Increasing aridity could lead to major problems for societies and ecosystems in already-arid places.
Dead Ahead: Less Rainfall for Drought-Sensitive
Southern Hemisphere Regions?
Warming climate may mean less rainfall for drought-sensitive regions of the Southern Hemisphere, according to results just published by an international research team. Geoscientist Curt Stager of Paul Smith's College in Paul Smiths, N.Y., and colleagues found that rainfall in South Africa during the last 1,400 years was affected by temperature--with more rain falling during cool periods and less during warm ones. The findings, published in the journal Climate of the Past, are supported by the National Science Foundation (NSF).
"The link between climate change and rainfall in certain latitudes can have large effects on ecosystems," said Paul Filmer, program officer in NSF's... More »
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