P2C2: Late Holocene Hydroclimate Variability in the Great Basin, and Its Causes

提供资金，利用长的树木年轮年表重建过去5000年来大流域地区过去的水文气候变量(降水、土壤湿度、径流)。这项研究的目的是将现代乐器记录放在一个更长期的背景下。该小组之前的研究表明，大约在公元500年到1350年之间，美国西部大盆地的干旱状况部分是由于热带强迫北半球冬季环流的变化，比如与现代拉尼娜事件有关的变化。更广泛的影响包括对大盆地水文学的更多了解，以及从树木年轮开发独特的高分辨率气候记录。

Funding is provided to reconstruct past hydroclimatic variables (precipitation, soil moisture, streamflow) in the Great Basin region over the past 5,000 years using long tree-ring chronologies. The aim of the research is to place the modern instrumental record in a longer-term context. Previous research by the group shows that dry conditions in the Great Basin of the western United States between circa AD 500 and 1350 partly resulted from tropically forced changes in winter Northern Hemisphere circulation like those associated with modern La Niña episodes.The broader impacts involve the promise of greater understanding of Great Basin hydrology and development of unique high-resolution records of climate from tree-rings.