Stalagmites in Brazilian Caves confirm 9000-year diminishing rainfall

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	Stalagmites in Brazilian Caves confirm 9000-year diminishing rainfall

amgumen

3-7-2009 8:01 PM

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3-8-2009 5:03 AM

michellezm

"Southern Hemisphere tropics have been getting wetter as maximum summer solar heating shifts southward"

We are experiencing the wettest summer ever with flooding in several places. January/February are usually our hottest months but we have only had 12 days of sun and the farmers are anxious because the crops are not growing. And last winter was the mildest I've ever experienced - on occasions even swimming at midnight because it was so hot. Something odd is afoot in the southern hemisphere.

3-8-2009 1:04 PM

tanyamm

We've just experienced our coldest winter.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/415a22a1-3993-4e48-96ba-d96df561c68f/B2F50657-5F69-41F5-A2C1-813C64408AA6/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php" href="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php" style="font-size: 11px;">www.umass.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.umass.edu/img/E54F198A-63FC-48A4-8C33-76327EFDABB2" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php">In general, the Northern Hemisphere tropics have been getting drier and the Southern Hemisphere tropics have been getting wetter as maximum summer solar heating shifts southward. But Northeast Brazil has been acting like a Northern Hemisphere site and it’s been getting steadily drier from about 9,000 years ago to today.” Millions of people there must cope with severely disruptive, recurring droughts, Burns and colleagues point out. A more accurate model of past conditions could help predict what to expect in the future. </blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php">The reason for the unusual rainfall pattern, with opposite dry and wet periods than expected, turned out to be a heretofore unobserved change in zonal (east-west) atmospheric circulation.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.umass.edu/newsoffice/newsreleases/articles/84582.php">We had not expected this area to show a pattern of changes in rainfall that was different—in fact opposite—from the rest of the Southern Hemisphere tropics in South America</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/B2F50657-5F69-41F5-A2C1-813C64408AA6/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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