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

P2C2：大盆地晚全新世水文气候变化及其原因

• 批准号: 0902279
• 负责人: Malcolm Hughes
• 金额: $ 39.28万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902279&HistoricalAwards=false
• 关键词: P2C2; Late; Holocene; Hydroclimate; Variability

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.

提供资金，利用长年轮年表重建大盆地地区过去5 000年的水文气候变量（降水、土壤湿度、径流）。 本研究的目的是将现代器乐唱片放在一个较长期的背景下。 该小组先前的研究表明，大约在公元500年至1350年之间，美国西部大盆地的干旱状况部分是由于冬季北方半球环流的热带强迫变化，如现代拉尼娜事件。更广泛的影响包括更好地了解大盆地水文和发展独特的高分辨率树木年轮气候记录。