Dry season: Difference between revisions

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The rain belt reaches roughly as far north as the [[Tropic of Cancer]] and as far south as the [[Tropic of Capricorn]]. Near these latitudes, there is one wet season and one dry season annually. At the [[equator]] there are two wet and two dry seasons, as the rain belt passes over twice a year, once moving north and once moving south. Between the tropics and the equator, locations may experience a short wet and a long wet season; and a short dry and a long dry season. Local geography may substantially modify these climate patterns, however.
New data shows that in the seasonal parts of the [[South America]]n [[Amazon rainforest|Amazon forest]], foliage growth and coverage varies between the dry and wet seasons—with about 25% more leaves and faster growth in the dry season. Researchers believe that the Amazon itself has an effect in bringing{{clarify|date=August 2015}} the onset of the wet season: by growing more foliage, it evaporates more water.<ref>{{cite web | url=http://news.mongabay.com/2007/0312-amazon.html | title=Amazon rainforest does have rainy and dry seasons | publisher=mongabay.com | date=March 12, 2007 | deadurl=yes | archiveurl=https://web.archive.org/web/20080604094546/http://news.mongabay.com/2007/0312-amazon.html | archivedate=June 4, 2008, | df= }}</ref> However, this growth appears only in the undisturbed parts of the Amazon basin, where researchers believe roots can reach deeper and gather more rainwater.<ref>{{cite web | url=http://www.eurekalert.org/pub_releases/2006-03/uoa-arg031506.php | title=Amazon rainforest greens up in the dry season}}</ref> It has also been shown that [[ozone]] levels are much higher in the dry than in the wet season in the Amazon basin.<ref>{{cite journal | url=http://www.agu.org/pubs/crossref/1990/89JD02892.shtml | title=Ozone measurements in Amazonia: Dry season versus wet season | author=V. W. J. H. Kirchhoff, I. M. O. Da Silva, E. V. Browell | journal=Journal of Geophysical Research| volume=95 | pages=16913 |doi=10.1029/jd095id10p16913| year=1990 | bibcode=1990JGR....9516913K }}</ref>