| 项目编号: | 1418411
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| 项目名称: | Collaborative Research: Arctic Temperature Amplification during the Middle Pliocene (ArcAMP): Assessing the interaction among feedback mechanisms |
| 作者: | Bette Otto-Bliesner
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| 承担单位: | University Corporation For Atmospheric Res
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| 批准年: | 2013
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| 开始日期: | 2014-10-01
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| 结束日期: | 2018-09-30
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| 资助金额: | USD300598
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | arctic temperature
; pliocene
; past temperature
; arctic amplification
; arctic surface temperature
; high arctic site
; various feedback mechanism
; surface temperature
; terrestrial feedback mechanism
; so-called arctic amplification
; arctic climate system
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| 英文摘要: | The Arctic is currently warming faster than anywhere else on Earth. This so-called Arctic Amplification of surface temperatures is well documented; however, the various feedback mechanisms and how they co-operate to amplify arctic temperatures remain uncertain. Important clues for solving some of these fundamental climate questions regarding arctic amplification may be found during the Pliocene (2.6 to 5.3 million years ago), which is the last time in Earth's history when atmospheric CO2 concentrations were comparable to modern concentrations of about 400 ppm, and yet arctic temperatures were 10 to 20 degrees C warmer.
This project investigates the interactions among terrestrial feedback mechanisms during the Pliocene and their role in amplifying arctic surface temperatures. In particular, it investigates the net radiative forcing of vegetation albedo, atmospheric water vapor, and black carbon emitted from fire on the arctic climate system. This will be accomplished by conducting high-resolution reconstructions of past temperatures, atmospheric CO2, and fire for three high arctic sites that have been recently well-dated by terrestrial cosmogenic nuclides. To disentangle how these processes may have been interacting to amplify arctic temperatures, a series of climate experiments will be conducted using the Community Earth System Model. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95416
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Bette Otto-Bliesner. Collaborative Research: Arctic Temperature Amplification during the Middle Pliocene (ArcAMP): Assessing the interaction among feedback mechanisms. 2013-01-01.
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