Using Space Lidar Observations to Decompose Longwave Cloud Radiative Effect Variations Over the Last Decade
Using Space Lidar Observations to Decompose Longwave Cloud Radiative Effect Variations Over the Last Decade
复制标题
利用空间激光雷达观测分解过去十年的长波云辐射效应变化
DOI：
10.1002/2017gl074628
复制
发表时间：
2017
影响因子：
5.2
通讯作者：
R. Plougonven
中科院分区：
文献类型：
--
作者：
T. Vaillant de Guélis;H. Chepfer;V. Noel;R. Guzman;D. Winker;R. Plougonven
大气层顶长波云辐射效应（LWCRE）的测量评估了云对地球变暖的贡献，但没有量化导致LWCRE变化的云属性变化。CALIPSO空间激光雷达直接观测云的详细轮廓、云的不透明度和云量。在这里，我们使用这些观测结果来量化云特性对2008年至2015年在热带和全球范围内观测到的LWCRE变化的影响。在全球范围内，这里提出的方法给出了良好的结果，除了在南大洋。我们发现，在海洋上观测到的全球LWCRE的变化主要是由于不透明的云属性的变化（82%），透明云柱贡献了18%。不透明云量的变化是LWCRE演变的第一贡献者（58%），不透明云温度是第二贡献者（28%）。
Measurements of the longwave cloud radiative effect (LWCRE) at the top of the atmosphere assess the contribution of clouds to the Earth warming but do not quantify the cloud property variations that are responsible for the LWCRE variations. The CALIPSO space lidar observes directly the detailed profile of cloud, cloud opacity, and cloud cover. Here we use these observations to quantify the influence of cloud properties on the variations of the LWCRE observed between 2008 and 2015 in the tropics and at global scale. At global scale, the method proposed here gives good results except over the Southern Ocean. We find that the global LWCRE variations observed over ocean are mostly due to variations in the opaque cloud properties (82%); transparent cloud columns contributed 18%. Variation of opaque cloud cover is the first contributor to the LWCRE evolution (58%); opaque cloud temperature is the second contributor (28%).