(SGER) BOREAS SSA Precipitation Radar

(SGER) BOREAS SSA 降水雷达

• 批准号: 9321105
• 负责人: Dennis Lettenmaier
• 金额: $ 4万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-03-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9321105&HistoricalAwards=false
• 关键词: SGER; BOREAS; SSA; Precipitation; Radar

9321105 Lettenmier The goal of BOREAS is "to improve our understanding of the interactions between the boreal forest biome and the atmosphere. The experimental design is based on intensive observations during summer, 1994, of two study areas of approximate size 400-600 km2, near the northern and southern limits of the boreal forest biome. The study areas, which are about 600 km apart, are near Thompson, Manitoba, and Nipawin, Saskatchewan. The objectives of this project are to acquire a radar data set for the BOREAS Southern Study Area (SSA) to define the spatial variability of precipitation in the summer of 1994 in 160 km diameter circle centered in the SSA. The precipitation is maximum in mid-summer and is associated with convective storms. Understanding the spatial distribution of summer precipitation, and the associated dynamics of soil moisture, are critical to the goal of BOREAS. Knowledge of the space-time distribution of soil moisture, and related runoff-generation mechanisms that affect evaporative fluxes under conditions of soil limitation, will be essential for studies exploring the interactions of boreal vegetation, trace gas fluxes, and other aspects of land-atmosphere dynamics in northern climates. Upscaling detailed local-scale energy and mass balances, and biophysical studies using remote sensing and modelling is an essential component. Upscaling is important because transport mechanisms occur at the scale of hundreds of km, but the governing processes are largely measure at the field scale. The PI's BOREAS research is funded by NASA and the proposed funding would, in its entirety, go toward the cost of locating, operating, and processing data collected from a C-band precipitation radar. The cost would be shared with the Canadian Atmospheric Environment Service (AES). The proposal should be considered as representative of a general need of the BOREAS community. ***

[321105] Lettenmier BOREAS的目标是“提高我们对北方森林生物群落和大气之间相互作用的理解。实验设计是根据1994年夏季对靠近北方森林生物群落北部和南部边界的两个面积约为400-600平方公里的研究区进行的密集观测。这两个研究区域相距约600公里，分别位于马尼托巴省的汤普森和萨斯喀彻温省的尼帕温附近。这个项目的目标是为北极气象系统南部研究区（SSA）获取一套雷达数据，以确定1994年夏季以SSA为中心的160公里直径圆圈内降水的空间变异性。盛夏降水最多，与对流风暴有关。了解夏季降水的空间分布，以及与之相关的土壤水分动态，对实现BOREAS的目标至关重要。了解土壤水分的时空分布，以及在土壤限制条件下影响蒸发通量的相关径流产生机制，对于探索北方植被、微量气体通量和北方气候中陆地-大气动力学的其他方面的相互作用的研究至关重要。提高详细的局部尺度能量和质量平衡，以及利用遥感和建模进行生物物理研究是一个重要组成部分。升级尺度很重要，因为运输机制发生在数百公里的尺度上，但控制过程主要是在野外尺度上测量的。PI的BOREAS研究由NASA资助，拟议的资金将全部用于定位、操作和处理从c波段降水雷达收集的数据的费用。费用将由加拿大大气环境服务局（AES）分担。这项建议应被视为代表了北纬as社区的一般需要。＊＊＊