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
• 负责人: Martin Jeffries
• 金额: $ 38.07万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-05-01 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614844&HistoricalAwards=false
• 关键词: Dynamic; Thermodynamic; Processes; Their; Contribution

This project is a study of the effects of antarctic sea ice in the global climate system, through an examination of how the spatial distribution of ice and snow thickness and of open water is reflected in satellite-based synthetic aperture radar (SAR) imagery. The field investigations will be carried out from the RVIB Nathaniel B. Palmer in winter 1998 and summer 1999, and will produce observations of the snow and ice distribution, the crystal structure, stable isotopes, salinity and temperature structure of ice cores, and the stratigraphy, grain size, and water content of the snow cover. The SAR images from ERS-2 and RADARSAT will be acquired at the McMurdo ground station, and processed at the Alaska SAR Facility. These will provide information about the large-scale ice motion field and the small-scale ice deformation field, both of which contribute to the observed ice thickness distribution. In addition, a study of the spatial and temporal variation of the backscattered microwave energy will contribute to the development of numerical models that simulate the dynamic and thermodynamic interactions among the sea ice, ocean, and atmosphere. The surface data is vital for the extraction of environmental information from the radar data, and for the ultimate validation of interactive models.

该项目是通过检查冰雪厚度和开阔水域的空间分布如何反映在基于卫星的合成孔径雷达（SAR）图像中，研究南极海冰对全球气候系统的影响。 现场调查将在RVI B Nathaniel B进行。Palmer在1998年冬季和1999年夏季进行了一次实地考察，并将对冰雪分布、晶体结构、稳定同位素、冰芯的盐度和温度结构以及雪盖的地层学、粒度和含水量进行观测。 将在麦克默多地面站获取ERS-2和RADARSAT的合成孔径雷达图像，并在阿拉斯加合成孔径雷达设施进行处理。 这些将提供有关大尺度冰运动场和小尺度冰变形场的信息，这两者都有助于观测到的冰厚度分布。 此外，对后向散射微波能量的空间和时间变化的研究将有助于模拟海冰、海洋和大气之间的动力学和热力学相互作用的数值模式的发展。 地面数据对于从雷达数据中提取环境信息和最终验证交互式模型至关重要。