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首页> 外文期刊>Bulletin of the American Meteorological Society >GLOBAL PRECIPITATION MEASUREMENT COLD SEASON PRECIPITATION EXPERIMENT (GCPEX) For Measurement's Sake, Let It Snow
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GLOBAL PRECIPITATION MEASUREMENT COLD SEASON PRECIPITATION EXPERIMENT (GCPEX) For Measurement's Sake, Let It Snow

机译：全球降水量测量冷季降水量试验（GCPEX）

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摘要

As a component of Earth's hydrologic cycle, and especially at higher latitudes, falling snow creates snowpack accumulation that in turn provides a large proportion of the freshwater resources required by many communities throughout the world. To assess the relationships between remotely sensed snow measurements with in situ measurements, a winter field project, termed the Global Precipitation Measurement (GPM) Cold Season Precipitation Experiment (GCPEx), was carried out in the winter of 2011/12 in Ontario, Canada. Its goal was to provide information on the precipitation microphysics and processes associated with cold season precipitation to support GPM snowfall retrieval algorithms that make use of a dual-frequency precipitation radar and a passive microwave imager on board the GPM core satellite and radiometers on constellation member satellites. Multiparameter methods are required to be able to relate changes in the microphysical character of the snow to measureable parameters from which precipitation detection and estimation can be based. The data collection strategy was coordinated, stacked, high-altitude, and in situ cloud aircraft missions with three research aircraft sampling within a broader surface network of five ground sites that in turn were taking in situ and volumetric observations. During the field campaign 25 events were identified and classified according to their varied precipitation type, synoptic context, and precipitation amount. Herein, the GCPEx field campaign is described and three illustrative cases detailed.
机译：作为地球水文循环的一部分，尤其是在高纬度地区，落雪会形成积雪，这反过来又提供了世界上许多社区所需的大部分淡水资源。为了评估遥感雪测量与原位测量之间的关系，于2011/12冬季在加拿大安大略省开展了一个冬季野外项目，称为全球降水测量（GPM）寒冷季节降水实验（GCPEx）。其目标是提供有关降水微物理学和与寒冷季节降水有关的过程的信息，以支持GPM降雪检索算法，该算法利用GPM核心卫星上的双频降水雷达和无源微波成像仪以及星座成员卫星上的辐射计。需要多参数方法，以便能够将雪的微物理特征的变化与可测量的参数相关联，从而可以基于这些参数进行降水检测和估算。数据收集策略是经过协调，堆叠，高空和原地云飞机飞行任务，在由五个地面站点组成的更广泛的地表网络中进行了三架研究飞机采样，这些站点依次进行了实地和体积观测。在野战期间，根据事件的不同降水类型，天气背景和降水量，对25个事件进行了识别和分类。在此，对GCPEx野外活动进行了描述，并详细说明了三个说明性案例。

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