| 项目编号: | 1723832
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| 项目名称: | Investigation of the mechanisms that drive intraseasonal Arctic surface air temperature variability during the winter |
| 作者: | Sukyoung Lee
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| 承担单位: | Pennsylvania State Univ University Park
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| 批准年: | 2017
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| 开始日期: | 2017-09-15
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| 结束日期: | 2020-08-31
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| 资助金额: | 607455
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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
; arctic surface air temperature
; winter
; day-to-month variability
; arctic science
; winter season
; arctic sea ice
; physical mechanism
; ocean temperature
; surface energy budget analysis
; warm moist air intrusion
; high arctic region
; arctic process
; day-to-month time scale variability
; warm moist air
; arctic temperature field
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| 英文摘要: | The scientific objectives of this proposal are to advance understanding of the physical mechanisms behind day-to-month time scale variability in Arctic surface air temperature during the cold season. Over the past several decades, the Arctic has been warming twice as fast as the rest of the planet, and most of this warming has occurred during winter when the Arctic receives very little sunlight. Until recently, the primary research focus in Arctic science has been on warm season processes; however, recent studies show that during winter when there is virtually no sunlight over the Arctic, warm moist air associated with weather systems is transported from the midlatitudes into the Arctic. These warm moist air intrusions, which can even warm high Arctic regions, have been occurring more frequently during recent years.
This research will improve extended and seasonal prediction of Arctic sea ice. It will also support a graduate student. The team will collaborate with The Center for Science and The Schools (CSATS) at Penn State University to lead two single-day workshops on Arctic processes for middle school teachers from urban and rural Pennsylvania school districts serving populations highly underrepresented in science, technology, engineering, and math fields. The workshop activity will enhance the teachers' awareness of the importance of studying the Arctic for the winter season. CSATS will evaluate the effectiveness of the workshop through pre/post tests, making necessary adjustments to the pedagogy sessions and activities for the second workshop.
Mechanisms that drive day-to-month variability of Arctic surface air temperature will be investigated. The evolution of dominant patterns of Arctic temperature field will be examined and quantified by performing surface energy budget analysis and moist static energy analysis for the atmosphere. The analysis will also include calculations of wave energy propagation. These data analyses will be complemented by computations with a numerical model of the atmosphere. The research will also include an examination of ocean currents and ocean temperatures, as well as sea ice data. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/88779
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Sukyoung Lee. Investigation of the mechanisms that drive intraseasonal Arctic surface air temperature variability during the winter. 2017-01-01.
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