Variations in Monsoon Intensity Recorded in Holocene Flood Deposits in India

印度全新世洪水沉积物记录的季风强度变化

• 批准号: 9104489
• 负责人: Victor Baker
• 金额: $ 32.09万
• 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: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9104489&HistoricalAwards=false
• 关键词: Variations; Monsoon; Intensity; Recorded; Holocene

The monsoon forms one of the most important features of the planetary atmospheric circulation, and the wet/dry seasonal pattern dominates the climate over large portions of tropical and subtropical Asia, Australia and Africa (Webster, 1987a). India lies at the heart of the classic monsoon region, and is the area most sensitive to monsoon fluctuations. It is ideally suited for a hydroclimatic application of paleofloods, as monsoon-related storms cause the largest floods. Slackwater deposits from floods in bedrock canyons are direct evidence of discrete extreme hydrologic events rather than proxy indicators of average climatic conditions. We will develop paleoflood records on several rivers in India to chronicle fluctuations in the monsoon intensity over centuries to millennia. The climatic implications of variations in the monsoon extend far beyond the Indian subcontinent through broad global teleconnections between the monsoon and other climatic phenomena such as the El Nino/Southern Oscillation. Our research will address regional hydrologic effects of global change that directly impact the inhabitants of the most populous portions of the Earth.

季风是行星大气环流最重要的特征之一，湿/干季节模式主导着亚洲大部分热带和亚热带、澳大利亚和非洲的气候（Webster，1987a）。 印度位于典型季风区的中心，是对季风波动最敏感的地区。 它非常适合古洪水的水文气候应用，因为季风相关的风暴会导致最大的洪水。 基岩峡谷洪水形成的滞水沉积物是离散极端水文事件的直接证据，而不是平均气候条件的代理指标。 我们将开发印度几条河流的古洪水记录，以记录几个世纪到几千年季风强度的波动。 通过季风与厄尔尼诺/南方涛动等其他气候现象之间广泛的全球遥相关，季风变化的气候影响远远超出了印度次大陆。 我们的研究将解决全球变化对区域水文的影响，这些影响直接影响地球上人口最多地区的居民。