| 项目编号: | NE/I010912/1
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| 项目名称: | Earth System Modelling of Abrupt Climate Change |
| 作者: | Paul Valdes
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| 承担单位: | University of Bristol
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| 批准年: | 2010
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| 开始日期: | 2011-01-03
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| 结束日期: | 2016-31-03
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| 资助金额: | GBP304417
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| 资助来源: | UK-NERC
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| 项目类别: | Research Grant
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| 国家: | UK
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| 语种: | 英语
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| 特色学科分类: | Atmospheric phys. & chemistry 
; (15%)
; Climate & Climate Change 
; (40%)
; Geosciences 
; (30%)
; Marine environments 
; (15%)
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| 英文摘要: | Recent studies of abrupt climate change have tended to focus on rapid cooling events related to an abrupt cessation or reduction in the Atlantic meridional overturning circulation. However, ice core records from Greenland which span the last glacial to interglacial cycle (approximately 100,000 years) indicate that abrupt warmings of the order of 10C, which took place in a few decades, are more representative of the past climatic record. Furthermore, although a clear understanding is still lacking, recent modelling efforts suggest that atmospheric dynamics could be more important in shaping these abrupt events than previously thought. We propose therefore to use an Earth System climate model which can quantitatively simulate multiple proxies recorded in Greenland ice (including temperature, methane and dust) to assess which patterns of forcings can be reconciled with these multiple ice core data constraints. We will perform sensitivity analyses to assess the potential for thresholds of abrupt atmospheric transitions and investigate their reliance on glacial topography and background climatic state. This project will therefore be the first to synthesise a number of ice-core records of abrupt climate change in a single, quantitative general circulation modelling framework and the results will place significant new constraints on our understanding of abrupt climate change in the past, and potentially in the future. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/103535
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | University of Bristol
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| Recommended Citation: | |
Paul Valdes. Earth System Modelling of Abrupt Climate Change. 2010-01-01.
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