| 项目编号: | 1341688
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| 项目名称: | Oceanic Response to a Coastal Polynya, Terra Nova Bay, Antarctica |
| 作者: | Christopher Zappa
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| 承担单位: | Columbia University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD898464
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| 资助来源: | US-NSF
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| 项目类别: | Continuing 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: | polynya
; coastal antarctic polynya
; near-surface oceanic observation
; large antarctic polynya system
; antarctic coastal polyna
; terra nova bay
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| 英文摘要: | Antarctic coastal polynas are, at the same time, sea-ice free sites and sea-ice factories. They are open water surface locations where water mass transformation and densification occurs, and where direct atmospheric exchanges with the deep ocean circulation are established. Various models of the formation and persistence of these productive and diverse ocean ecosystems are hampered by the relative lack of in situ meteorological and physical oceanographic observations. This is especially so during the inhospitable conditions of their formation and activity during autumn to winter transition and the polar night. The Western Ross Sea, downstream from two of the largest coastal Antarctic polynyas, happens to be a region where there continues to be net sea-ice production, as indicated by satellite measurements of areal extent, duration and concentration.
Characterization of the lower atmosphere properties, air-sea surface heat fluxes and corresponding ocean depth profiles of the Terra Nova Bay (TNB) polynya, is sought for a more detailed understanding of the role of polynyas in the production of latent-heat type sea ice and the formation, through sea ice brine rejection, of dense ocean bottom waters. This observational program will simultaneously identify mechanisms responsible for water mass modification within TNB and document aspects of dense shelf water formation within a large Antarctic polynya system. This study will characterize the water masses within a polyna over the course of an annual cycle using moorings yielding in-situ column and near-surface oceanic observation. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95868
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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: | |
Christopher Zappa. Oceanic Response to a Coastal Polynya, Terra Nova Bay, Antarctica. 2013-01-01.
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