Summer precipitation varies yearly, but by mid-century a new NASA analysis forecasts basically no rain in much of the Southwest and California in some years, reports Climate Progress. And the Amazon will suffer, too. “In response to carbon dioxide-induced warming, the global water cycle undergoes a gigantic competition for moisture, resulting in a global pattern of increased heavy rain, decreased moderate rain, and prolonged droughts in certain regions,” said lead NASA study author William Lau. Equatorial tropical areas will see the most significant increase in heavy rainfall, particularly in the Pacific Ocean and Asian monsoon regions. Some regions outside the tropics may have no rainfall at all. And the length of dry periods will increase globally by with further warming. In the Northern Hemisphere, other areas most likely to be affected include the deserts and arid regions of Mexico, North Africa, the Middle East, Pakistan, and northwestern China. In the Southern Hemisphere, such areas include South Africa, northwestern Australia, coastal Central America and northeastern Brazil. Such precipitation changes, Lau said, “can have the most impact on society because they occur in regions where most people live.”
Join the swelling numbers of voters TELLING Congress they’ll vote for Clean Energy candidates here: http://signon.org/sign/we-are-the-clean-99?source=c.em.cp&r_by=487176 . This is an ongoing campaign (the next Congressional election is in 2 years!) so please, spread the word. It’s our way of telling Congress that a strong clean energy voting bloc is out there. This is how YOU can make a difference.
For more on Climate Change, check out my weekly column at the HuffingtonPost, Climate Change This Week : http://www.huffingtonpost.com/author/index.php?author=mary-ellen-harte
NASA Projects Carbon Pollution Impact: ‘Some Regions Outside The Tropics May Have No Rainfall At All’ see also: Warming climate likely means more floods, droughts. The Earth’s wettest regions are likely to get wetter while the most arid will get drier due to warming of the atmosphere caused by increased levels of carbon dioxide, according to a new NASA analysis of more than a dozen climate models. National Public Radio http://thinkprogress.org/climate/2013/05/03/1960961/nasa-projects-carbon-pollution-impact-some-regions-outside-the-tropics-may-have-no-rainfall-at-all/