Hydrologic-energy balance constraints on the Holocene lake-level history of lake Titicaca, South America

被引：0
|
作者：
H. D. Rowe
R. B. Dunbar
机构：
[1] Stanford University,Geological and Environmental Sciences
[2] University of Kentucky,Geological Sciences
来源：
Climate Dynamics | 2004年 / 23卷
关键词：
Holocene; Lake Level; Cloud Fraction; Stella Model; Land Surface Albedo;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A basin-scale hydrologic-energy balance model that integrates modern climatological, hydrological, and hypsographic observations was developed for the modern Lake Titicaca watershed (northern Altiplano, South America) and operated under variable conditions to understand controls on post-glacial changes in lake level. The model simulates changes in five environmental variables (air temperature, cloud fraction, precipitation, relative humidity, and land surface albedo). Relatively small changes in three meteorological variables (mean annual precipitation, temperature, and/or cloud fraction) explain the large mid-Holocene lake-level decrease (∼85 m) inferred from seismic reflection profiling and supported by sediment-based paleoproxies from lake sediments. Climatic controls that shape the present-day Altiplano and the sediment-based record of Holocene lake-level change are combined to interpret model-derived lake-level simulations in terms of changes in the mean state of ENSO and its impact on moisture transport to the Altiplano.
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收藏
页码：439 / 454
页数：15
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