Those who have followed my various blogs for the last year and a half know that I often level charges that the Global Warming cultists have hijacked the environmental movement. While environmentlism is often associated with the left, those are the far left extremists, proper stewardship of our resources is also a conservative principle.
I often counter the arguements of the Cult of Global Warming by saying that it is unabated pollution that is causing the extreme temperature fluctuations and melting ice caps in Europe, glaciers in Greenland and contgributing to droughts. The last decade or so of growth in Asia has led to horrible pollution that is shortening the lives of their people, causing serious harm to their water and land resources, and is effecting the rest of the world.
Average global temperatures have been decreasing since 1997 as these countries have been pouring more and more unchecked emissions from their coal burning plants into the sky. This artilce from NASA, as published in Science News explains the phenomenon of how pollution is contributing to the changing weather and precipitation patterns.
ScienceDaily (May 28, 2008) — Clouds have typically posed a problem to scientists using satellites to observe the lowest part of the atmosphere, where humans live and breathe, because they block the satellite's ability to capture a clear, unobstructed view of Earth's surface. It turns out, however, that these "obstructions" are worth a closer look, as clouds and their characteristics actually serve a valuable role in Earth's climate. That closer look is now available by satellites comprising the Afternoon Constellation, or A-Train.
"The A-Train is providing a new way to examine cloud types," said Mark Schoeberl, A-Train project scientist at NASA's Goddard Space Flight Center, Greenbelt, Md.
Using data from instruments in a constellation of NASA satellites, scientists have discovered that they can see deep inside of clouds. The satellites are taking first-of-a-kind measurements, shedding new light on the link between clouds, pollution and rainfall.
Jonathan Jiang of NASA's Jet Propulsion Laboratory, Pasadena, Calif., and colleagues used these A-Train sensors to find that South American clouds infused with airborne pollution – classified as "polluted clouds" – tend to produce less rain than their "clean" counterparts during the region's dry season. Details of the findings will be presented May 27 at the American Geophysical Union's 2008 Joint Assembly in Fort Lauderdale, Fla.
Discovery of the link between rain and pollution was possible due to near-simultaneous measurements from multiple satellites making up the string of satellites in the Afternoon Constellation, more commonly called the A-Train. "Typically, it is very hard to get a sense of how important the effect of pollution on clouds is," said Anne Douglass, deputy project scientist at Goddard for NASA’s Aura satellite. "With the A-Train, we can see the clouds every day and we're getting confirmation on a global scale that we have an issue here."
Jiang's team used the Microwave Limb Sounder on the A-Train's Aura satellite to measure the level of carbon monoxide in clouds. The presence of carbon monoxide implies the presence of smoke and other aerosols, which usually come from the same emission source, such a power plant or agricultural fire.
With the ability to distinguish between polluted and clean clouds, the team next used Aqua's Moderate Resolution Imaging Spectroradiometer to study how ice particle sizes change when aerosol pollution is present in the clouds. The team also used NASA's Tropical Rainfall Measuring Mission satellite to measure the amount of precipitation falling from the polluted and clean clouds. All three measurements together show the relationship between pollution, clouds and precipitation.
The team found that polluted clouds suppressed rainfall during the June-to-October dry season in South America, which is also a period of increased agricultural burning. During that period it was more difficult for the measurably smaller ice particles in aerosol polluted clouds to grow large enough to fall as rain.
This trend turned up seasonal and regional differences, however, and aerosol pollution was found, on average, to be less of a factor during the wet monsoon seasons in South America and in South Asia. Other physical effects, such as large-scale dynamics and rainy conditions that clear the air of aerosol particles, might also be at play, the researchers suggest.
No comments:
Post a Comment