| 项目编号: | 1401220
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| 项目名称: | The Impact of Tropical/Extratropical Interaction on Atmospheric Teleconnections |
| 作者: | Steven Feldstein
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| 承担单位: | Pennsylvania State Univ University Park
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| 批准年: | 2013
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| 开始日期: | 2014-05-01
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| 结束日期: | 2018-04-30
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| 资助金额: | USD656721
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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 - Atmospheric and Geospace Sciences
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| 英文关键词: | tropical/extratropical interaction
; week
; teleconnection pattern
; dominant northern hemisphere teleconnection pattern
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| 英文摘要: | This project has the goal of improving understanding of the basic dynamical processes that drive tropical/extratropical interaction on the intraseasonal time by performing both idealized numerical model experiments and diagnostic analyses. Enhanced understanding of tropical/extratropical interaction is crucial for improving medium range (1-4 week) weather forecasts.
Recent studies have shown that different phases of an active tropical Madden-Julian Oscillation (MJO) are followed 1-4 weeks later by the excitation of the dominant Northern Hemisphere teleconnection patterns (both the North Atlantic Oscillation and the Pacific/North American patterns), and coincide with large changes in the frequency of occurrence of these teleconnection patterns. It has been found that probabilistic weather forecasts based on both MJO and El-Nino-Southern-Oscillation phases outperform state-of-the-art numerical weather prediction models for North America with lead times of 2 to 4 weeks. Changes to Arctic surface air temperature have even been observed following an active MJO. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/97062
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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: | |
Steven Feldstein. The Impact of Tropical/Extratropical Interaction on Atmospheric Teleconnections. 2013-01-01.
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