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首页> 外文期刊>Atmospheric chemistry and physics >Estimating precipitation susceptibility in warm marine clouds using multi-sensor aerosol and cloud products from A-Train satellites
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Estimating precipitation susceptibility in warm marine clouds using multi-sensor aerosol and cloud products from A-Train satellites

机译：使用A-Train卫星的多传感器气溶胶和云产品估算温暖的海洋云中的降水敏感性

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Precipitation susceptibility to aerosol perturbation plays a?key role in understanding aerosol–cloud interactions and constraining aerosol indirect effects. However, large discrepancies exist in the previous satellite estimates of precipitation susceptibility. In this paper, multi-sensor aerosol and cloud products, including those from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO), CloudSat, Moderate Resolution Imaging Spectroradiometer (MODIS), and Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) from June?2006 to April?2011 are analyzed to estimate precipitation frequency susceptibility iS/isubPOP/sub, precipitation intensity susceptibility iS/isubI/sub, and precipitation rate susceptibility iS/isubR/sub in warm marine clouds. We find that iS/isubPOP/sub strongly depends on atmospheric stability, with larger values under more stable environments. Our results show that precipitation susceptibility for drizzle (with a ?15?dBZ rainfall threshold) is significantly different than that for rain (with a 0?dBZ rainfall threshold). Onset of drizzle is not as readily suppressed in warm clouds as rainfall while precipitation intensity susceptibility is generally smaller for rain than for drizzle. We find that iS/isubPOP/sub derived with respect to aerosol index (AI) is about one-third of iS/isubPOP/sub derived with respect to cloud droplet number concentration (CDNC). Overall, iS/isubPOP/sub demonstrates relatively robust features throughout independent liquid water path (LWP) products and diverse rain products. In contrast, the behaviors of iS/isubI/sub and iS/isubR/sub are subject to LWP or rain products used to derive them. Recommendations are further made for how to better use these metrics to quantify aerosol–cloud–precipitation interactions in observations and models.
机译：沉淀物对气溶胶扰动的敏感性在理解气溶胶与云之间的相互作用以及限制气溶胶间接影响方面起着关键作用。但是，以前的卫星对降水敏感性的估计存在很大差异。本文介绍了多传感器气溶胶和云产品，包括来自云气激光雷达和红外探路卫星观测（CALIPSO），CloudSat，中分辨率成像光谱仪（MODIS）以及用于地球观测系统的高级微波扫描辐射仪（分析了2006年6月至2011年4月的AMSR-E）以估算降水频率敏感性 S POP ，降水强度敏感性 S I 和暖海云中的降水率敏感性 S R 。我们发现 S POP 强烈依赖于大气稳定性，在更稳定的环境中其值更大。我们的结果表明，细雨（降雨阈值为15？dBZ）的降雨敏感性与降雨（降雨阈值为0？dBZ）的降雨敏感性显着不同。在温暖的云层中，细雨的发生不像降雨那样容易被抑制，而雨水的降水强度敏感性通常比细雨小。我们发现，关于气溶胶指数（AI）得出的 S POP 大约是 S POP 的三分之一关于云滴数浓度（CDNC）得出的。总体而言， S POP 在整个独立的液态水路径（LWP）产品和多种雨水产品中都表现出相对强大的功能。相反， S I 和 S R 的行为受LWP或用于导出它们的雨水的影响。 。对于如何更好地使用这些指标来量化观测和模型中的气溶胶-云-降水相互作用，还提出了一些建议。

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