Elucidating Both the Northwest Extent of Glacial Lake Agassiz, and the Northwest and South Outlet Chronologies

阐明阿加西冰川湖的西北范围以及西北和南出口年代

• 批准号: 9972998
• 负责人: Timothy Fisher
• 金额: $ 23万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9972998&HistoricalAwards=false
• 关键词: Elucidating; Both; Northwest; Extent; Glacial

9972998FisherThe objectives of this field-based research are to constrain the spatial extent and chronology of the northwest outlet of glacial Lake Agassiz, and to determine its temporal relationships with the southern outlet and climate change. Lake Agassiz was also instrumental in routing glacial meltwater from the retreating ice sheet to the Gulf of Mexico, North Atlantic and Arctic Oceans. However, the timing and location of the northwest outlet which fed water to the Arctic Ocean is not well understood. Knowing the outlet chronology is especially critical because opening of the northwest outlet was nearly coincident with the sudden ending of the Younger Dryas cold period and with a pause in the warming known as the Preboreal oscillation. The effects on atmospheric and oceanic circulation from meltwater discharged to either the Arctic Ocean or gulf of Mexico would have been significant, influencing North Atlantic thermohaline circulation.

9972998FisherThe的目标，这一领域为基础的研究是限制的空间范围和年表的西北出口冰川湖阿加西，并确定其时间关系与南部出口和气候变化。 阿加西湖也有助于将冰川融水从退缩的冰盖引导到墨西哥湾，北大西洋和北冰洋。 然而，向北冰洋供水的西北出口的时间和位置尚不清楚。 知道出口的年代是特别重要的，因为西北出口的开放几乎与新仙女木冷期的突然结束和被称为北半球振荡的变暖的暂停相一致。 排放到北冰洋或墨西哥湾的融水对大气和海洋环流的影响将是显著的，影响北大西洋温盐环流。