Collaborative Research: P2C2--Evaluating the Origins of Multidecadal Variability in Late Holocene Indian Summer Monsoon Rainfall in Nepal

合作研究：P2C2——评估尼泊尔全新世晚期印度夏季季风降雨的多年代际变化的起源

• 批准号: 2102844
• 负责人: Caroline Ummenhofer
• 金额: $ 14.91万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2102844&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; Evaluating; Origins

The research team aims to develop a replicated, 4000-year-long, precisely dated, sub-decadally resolved, multi-proxy stalagmite reconstruction of Indian Summer Monsoon (ISM) rainfall in Nepal and to couple this record with climate model simulations to examine the nature and origins of multidecadal monsoon variability during different climate states of the late Holocene. The ISM supplies nearly seventy percent of South Asia’s annual precipitation, serving as the primary water resource for agriculture and the myriad of natural environments, including glaciers, across the region. Over the last century and a half, ISM rainfall has been positively correlated at multidecadal time scales with sea surface temperatures in the North Atlantic Ocean. However, in the last twenty years, this link appears to have been broken, with monsoon rainfall over India failing to increase despite a much warmer North Atlantic. This shift has profound consequences for regional ecosystems and the approximately two billion people living in South Asia. The potential Broader Impacts include a deeper understanding of a climatological system which impacts large human population centers, capacity building and expertise exchange with international colleagues, support of students involved with the research, and public outreach.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

尼泊尔中降雨的复制，4000年的印度夏季季风（ISM）的研究，并将记录与气候模型模拟记录，以检查多年多年季风变化的性质和起源不同。全新世。霍维尔（Lantic Ocean）影响包括对气候系统的更深入的了解，该系统影响了ERS，CAPACE建设和与国际同事的专业知识交流，对研究统计任务的学生的支持，并获得了值得支持该基金会的知识分子优点影响审查的值得支持的。