Lake Nicaragua: A Possible High Resolution Record of Tropical Climate

摘要ATM-9711788摩尔，西奥多密歇根大学标题：尼加拉瓜湖：热带气候的可能高分辨率记录 这个SGER奖支持一项旨在建立尼加拉瓜湖古气候潜力的研究。 尼加拉瓜湖位于东北信风带中心约12 oN处，似乎为古气候研究提供了一个非常有前途的目标。 它是美洲最大的湖泊，位于南纬16度的喀喀湖和北纬41度的大盐湖之间。 该地区的降雨季节性很强，气候受厄尔尼诺/南方涛动循环的强烈影响。 该湖的位置和大小非常适合记录ENSO热带循环温度和降雨量变化导致的区域气候变化。 该湖的古气候记录可以形成沿着PEP I样带（美洲）的重要连接点，该样带由PAGES（国际过去全球变化计划，国际地圈生物圈计划的核心项目）提出。 对尼加拉瓜湖沉积物的研究很少，地层记录可能受到构造活动的干扰，或在较浅的地区受到风暴的强烈改造和混合。 然而，表层沉积物的有机物含量高，至少有一些深度达到40米，这为恢复非常有用的古气候记录提供了很大的希望。

Abstract ATM-9711788 Moore, Theodore University of Michigan Title: Lake Nicaragua: A Possible High Resolution Record of Tropical Climate This SGER award supports a study designed to establish the paleoclimate potential of Lake Nicaragua. Located at approximately 12oN in the heart of the northeast trade wind belt, Lake Nicaragua appears to offer a very promising target for paleoclimate studies. It is the largest single lake in the Americas between Lake Titicaca at about 16oS and the Great Salt Lake at about 41oN. Rainfall in the area is highly seasonal and the climate of the area is strongly affected by the ENSO cycle. The location and size of the lake is ideal for recording regional variations in climate driven by changes in the ENSO tropical cycle in temperature and rainfall. Paleoclimate records from this lake could form an important tie point along the PEP I transect (The Americas) proposed by PAGES (the international Past Global Changes Program, a core project of the International Geosphere-Biosphere Program). Little work has been done on the sediments from Lake Nicaragua and it is possible that the stratigraphic record may be disturbed by tectonic activity or strongly reworked and mixed in the shallower areas by storms. However, the high organic content of the surface sediments and the presence of at least some deeps reaching 40 m offer substantial hope that a very useful paleoclimate record can be recovered.