The Role of Snow in Antarctic Sea Ice Development and Ocean-Atmosphere Energy Exchange
雪在南极海冰发育和海洋-大气能量交换中的作用
基本信息
- 批准号:9316767
- 负责人:
- 金额:$ 45.1万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1994
- 资助国家:美国
- 起止时间:1994-09-01 至 1999-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The goal of this investigation is to understand the role of snow in sea ice development processes and air-ice-ocean heat exchange interactions in the seasonal and perennial sea ice zones of the Ross Sea, the Amundsen Sea, and the Bellingshausen Sea. Observations and measurements of the characteristics of sea ice and snow will be combined with numerical models of sea-ice flooding and the entrainment of snow into the ice cover in order to gain an understanding of the sea-ice heat and mass balance, and to quantify the energy exchange within the antarctic sea-ice cover. The snow measurement program, using the RVIB Nathaniel B. Palmer, will include depth, grain size and morphology, density, temperature, thermal conductivity, water content, and stable isotope ratio. The ice measurement program will include thickness, salinity, temperature, density, brine content, and included gas volume, as well as such structural properties as the fraction of frazil, platelet, and congelation ice in the seasonal antarctic pack ice. Differences in ice types are the result of differences in the environment in which the ice forms: frazil ice is formed in supercooled sea water, normally through wind or wave-induced turbulence, while platelet and congelation ice is formed under quiescent conditions. The fraction of frazil ice is an important variable in the energy budget of the upper ocean, and contributes significantly to the stabilization of the surface layers. The numerical models will involve the thermodynamics of phase changes from liquid water to ice, along with the resulting energy transfer, brine expulsion, and the modulating effect of a snow cover. The results are expected to have broad relevance and application to understanding the effects of sea-ice processes in global change, and atmospheric, oceanographic, and remote sensing investigations of the Southern Ocean.
本次调查的目的是了解雪在罗斯海,阿蒙森海和别林斯高晋海的季节性和常年海冰区的海冰发展过程和空气-冰-海洋热交换相互作用中的作用。 对海冰和积雪特性的观测和测量将与海冰泛滥和积雪卷入冰盖的数值模型相结合,以了解海冰热量和质量平衡,并量化南极海冰覆盖层内的能量交换。 雪测量程序,使用RVI B纳撒尼尔B。 Palmer的数据将包括深度、粒度和形态、密度、温度、热导率、含水量和稳定同位素比。 冰测量计划将包括厚度、盐度、温度、密度、盐水含量和包含的气体体积,以及诸如季节性南极浮冰中的碎片、血小板和碎冰的分数等结构特性。 冰的类型不同是由于冰形成的环境不同:碎冰是在过冷的海水中形成的,通常是通过风或波浪引起的湍流,而片状冰和碎冰是在静止条件下形成的。 冰的分数是海洋上层能量收支的一个重要变量,并对表层的稳定性有重要贡献。 数值模型将涉及从液态水到冰的相变热力学,沿着产生的能量转移,盐水排出和积雪的调节作用。 预计这些结果将具有广泛的相关性和应用,以了解海冰过程在全球变化中的影响,以及南大洋的大气,海洋学和遥感调查。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Martin Jeffries其他文献
Martin Jeffries的其他文献
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{{ truncateString('Martin Jeffries', 18)}}的其他基金
Measurement and Modelling of the Variability of Lake Ice Growth and Decay in Alaska
阿拉斯加湖冰生长和衰退变化的测量和建模
- 批准号:
0117645 - 财政年份:2001
- 资助金额:
$ 45.1万 - 项目类别:
Standard Grant
Planning Grant for Snow and Ice Research Experience to Provide Professional Development with Emerging Technologies and Promote Teacher Retention
为冰雪研究经验规划拨款,以利用新兴技术提供专业发展并促进教师保留
- 批准号:
0109082 - 财政年份:2001
- 资助金额:
$ 45.1万 - 项目类别:
Standard Grant
Symposium on Sea Ice and Its Interactions with the Ocean, Atmosphere, and Biosphere
海冰及其与海洋、大气和生物圈相互作用研讨会
- 批准号:
9872803 - 财政年份:1998
- 资助金额:
$ 45.1万 - 项目类别:
Standard Grant
Dynamic/Thermodynamic Processes and Their Contribution to the Sea Ice Thickness Distribution and Radar Backscatter in the Ross Sea
罗斯海动力/热力过程及其对海冰厚度分布和雷达后向散射的贡献
- 批准号:
9614844 - 财政年份:1997
- 资助金额:
$ 45.1万 - 项目类别:
Continuing Grant
Interrelations Between Structural Characteristics, Physical Properties, and SAR Signatures of Late-Summer Pack Ice in the Beaufort-Chukchi Sea
波弗特-楚科奇海夏末浮冰的结构特征、物理性质和 SAR 特征之间的相互关系
- 批准号:
9122948 - 财政年份:1992
- 资助金额:
$ 45.1万 - 项目类别:
Continuing Grant
Sea Ice Physical-Structrual Characteristics: Development and SAR Signature in the Pacific Sector of the Southern Ocean
海冰物理结构特征:南大洋太平洋区的发展和SAR特征
- 批准号:
9117721 - 财政年份:1992
- 资助金额:
$ 45.1万 - 项目类别:
Continuing Grant
Physical Properties and Structural-Stratographic Variations of Frazil, Platlet and Congelation Sea Ice, Ross Sea, Antarctica
南极洲罗斯海冰、片状海冰和凝结海冰的物理性质和结构地层变化
- 批准号:
8915863 - 财政年份:1990
- 资助金额:
$ 45.1万 - 项目类别:
Continuing Grant
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