How Do Fluctuations in Summer Temperature Affect Monsoonal Events?

夏季气温波动如何影响季风事件？

• 批准号: 2026311
• 负责人: David Porinchu
• 金额: $ 37.22万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-15 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2026311&HistoricalAwards=false
• 关键词: How; Do; Fluctuations; Summer; Temperature

This project will document how the strength of the Indian Summer Monsoon has varied over recent millennia and investigate how variations in the Indian Summer Monsoon are linked to fluctuations in summer temperature. This knowledge is crucial to improving our understanding of the mechanisms driving precipitation variability in a highly populous, agriculturally-dependent region. The quantitative records of precipitation data produced by this project will be used to refine climate models simulating future precipitation conditions and thereby, help society to better anticipate the potential impacts associated with projected climate change. This project will broaden participation of undergraduate and graduate students in field and laboratory-based geosciences, advancing the STEM workforce with well-trained geoscientists. This interdisciplinary project will strengthen collaborations between environmental scientists both nationally and internationally. The historical instrumental record for the Indian Summer Monsoon is too short to adequately document the full range of long-term variability in the strength of the Indian Summer Monsoon. Lengthier records of long-term and abrupt fluctuations in the Indian Summer Monsoon will provide insight into the behavior of the monsoon system. This information will be used to improve the predictive abilities of existing models simulating the potential responses of summer monsoon precipitation to on-going and projected environmental variability. The biological, chemical, and physical properties of sediment cores recovered from lakes will be used to determine if precipitation is correlated with summer temperature during the past, and if the widespread abandonment of Bronze Age settlements corresponds to a short-lived interval of extreme aridity. This project will contribute significantly to our understanding of how changes in the mean state of environmental systems can influence the global monsoon.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.

该项目将记录印度夏季风的强度在近千年来的变化，并研究印度夏季风的变化如何与夏季温度的波动有关。这方面的知识是至关重要的，以提高我们的理解机制驱动降水变化在人口稠密，农业依赖地区。该项目产生的降水数据的定量记录将用于改进模拟未来降水条件的气候模型，从而帮助社会更好地预测与预测的气候变化相关的潜在影响。该项目将扩大本科生和研究生在实地和实验室为基础的地球科学的参与，推进STEM劳动力与训练有素的地球科学家。这一跨学科项目将加强国内和国际环境科学家之间的合作。印度夏季风的历史仪器记录太短，无法充分记录印度夏季风强度的长期变化。印度夏季季风长期和突然波动的更长记录将提供对季风系统行为的深入了解。这些信息将被用来提高现有模型的预测能力，模拟夏季季风降水对正在进行的和预计的环境变率的潜在反应。从湖泊中回收的沉积物岩心的生物、化学和物理性质将用于确定降水量是否与过去夏季温度相关，以及青铜时代定居点的广泛废弃是否与极端干旱的短暂间隔相对应。该项目将为我们了解环境系统平均状态的变化如何影响全球季风做出重大贡献。该奖项反映了NSF的法定使命，并且通过使用基金会的知识价值和更广泛的影响进行评估，被认为值得支持审查标准。

项目成果

Sedimentological and Grain Size Characteristics of Two Lake Cores from Himachal Pradesh, India

印度喜马偕尔邦两个湖心的沉积学和粒度特征

• DOI: 10.3233/jcc210024
• 发表时间: 2021
• 期刊: Journal of Climate Change
• 影响因子: 0.6
• 作者: Kholia, Neha;Kotlia, Bahadur Singh;Porinchu, David;Bisht, Kamini;Sharma, Anupam;Jalal, Poonam
• 通讯作者: Jalal, Poonam

Palaeoenvironmental Reconstruction Through Granulometric Analysis of a Palaeolake Deposit at Bhikiyasain, Kumaun Lesser Himalaya

通过对小喜马拉雅库马恩 Bhikiyasain 古湖沉积物进行粒度分析来重建古环境

• DOI: 10.3233/jcc230004
• 发表时间: 2023
• 期刊: Journal of Climate Change
• 影响因子: 0.6
• 作者: Kotlia, B.S.;Kukreti, Manmohan;Bisht, Harish;Singh, A.K.;Sharma, Anupam;Kothyari, G.C.;Porinchu, David F.;Chand, Pooja;Kashyap, Rajkumar;Sharma, G.K.
• 通讯作者: Sharma, G.K.