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Numerical Model Generation of Test Frames for Pre-launch Studies of EarthCARE’s Retrieval Algorithms and Data Management System
Atmospheric Measurement Techniques ( IF 3.8 ) Pub Date : 2022-11-21 , DOI: 10.5194/amt-2022-300
Zhipeng Qu, David P. Donovan, Howard W. Barker, Jason N. S. Cole, Mark W. Shephard, Vincent Huijnen

Abstract. The Earth Cloud, Aerosol and Radiation Explorer (EarthCARE) satellite consists of active and passive sensors whose observations will be acted on by an array of retrieval algorithms. Earth-CARE’s retrieval algorithms have undergone pre-launch verifications within a virtual observing system that consists of 3D atmosphere-surface data produced by the Global Environmental Multi-scale (GEM) NWP model, and instrument simulators that when applied to NWP data yield syn-thetic observations for EarthCARE’s four sensors. Retrieval algorithms operate on the synthetic observations and their estimates go into radiative transfer models that produce top-of-atmosphere solar and thermal broadband radiative quantities, which are compared to synthetic broadband measurements thus mimicking EarthCARE’s radiative closure assessment. Three high-resolution test frames were simulated; each measures ~6,200 km along-track by 200 km across-track. Hori-zontal grid-spacing is 250 m and there are 57 atmospheric layers up to 10 mb. The frames span wide ranges of conditions and extend over: i) Greenland to The Caribbean crossing a cold front off Nova Scotia; ii) Nunavut to Baja California crossing over Colorado’s Rooky Mountains; and iii) central equatorial Pacific Ocean that includes a mesoscale convective system. This report discusses how the test frames were produced and presents their key geophysical features. All data are publicly available and, owing to their high-resolution, could be used to simulate observations for other measurement systems.

中文翻译:

EarthCARE 检索算法和数据管理系统启动前研究测试框架的数值模型生成

摘要。地球云、气溶胶和辐射探测器(EarthCARE) 卫星由主动和被动传感器组成,这些传感器的观测结果将由一系列检索算法处理。Earth-CARE 的检索算法已经在虚拟观测系统中进行了预启动验证,该系统由全球环境多尺度 (GEM) NWP 模型生成的 3D 大气表面数据和应用于 NWP 数据的仪器模拟器组成EarthCARE 的四个传感器的主题观察。检索算法对综合观测进行操作,并将它们的估计值输入辐射传输模型,该模型产生大气层顶部的太阳能和热宽带辐射量,将其与合成宽带测量进行比较,从而模仿 EarthCARE 的辐射闭合评估。模拟了三个高分辨率测试帧;每个措施〜6,沿轨道 200 公里,跨轨道 200 公里。水平网格间距为250米,10兆大气层有57层。这些框架涵盖了广泛的条件,并延伸到:i) 格陵兰岛到加勒比海地区,穿过新斯科舍省的冷锋;ii) Nunavut 到 Baja California,穿越科罗拉多州的 Rooky 山脉;iii) 包括中尺度对流系统的中赤道太平洋。本报告讨论了测试框架是如何产生的,并介绍了它们的关键地球物理特征。所有数据都是公开的,并且由于其高分辨率,可用于模拟其他测量系统的观测。i) 格陵兰到加勒比海穿过新斯科舍的冷锋;ii) Nunavut 到 Baja California,穿越科罗拉多州的 Rooky 山脉;iii) 包括中尺度对流系统的中赤道太平洋。本报告讨论了测试框架是如何产生的,并介绍了它们的关键地球物理特征。所有数据都是公开的,并且由于其高分辨率,可用于模拟其他测量系统的观测。i) 格陵兰到加勒比海穿过新斯科舍的冷锋;ii) Nunavut 到 Baja California,穿越科罗拉多州的 Rooky 山脉;iii) 包括中尺度对流系统的中赤道太平洋。本报告讨论了测试框架是如何产生的,并介绍了它们的关键地球物理特征。所有数据都是公开的,并且由于其高分辨率,可用于模拟其他测量系统的观测。
更新日期:2022-11-22
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