论文标题
在巨大大气下沉淀对表面温度的敏感性较小
Smaller Sensitivity of Precipitation to Surface Temperature under Massive Atmospheres
论文作者
论文摘要
降水及其对强迫的反应是行星气候系统的重要方面。在这项研究中，我们使用三种全球大气通用循环模型（GCM）和一个区域云分辨模型（CRM）检查了不同大气质量的实验中降水的强度及其对表面变暖的反应。我们发现，对于给定的表面温度，大气质量较大时，降水较弱。此外，在较大的大气质量下，随着表面温度升高的降水速率的增加小于较小的大气质量下的降水速度。这些行为可以根据大气或表面能量平衡来理解。大气质量会影响瑞利散射，大气中的多个散射，压力扩大，失去速度，从而降水强度。这些结果对早期地球，早期火星和海洋系外行星的气候和宜居性具有重要意义。
Precipitation and its response to forcings is an important aspect of planetary climate system. In this study, we examine the strength of precipitation in the experiments with different atmospheric masses and their response to surface warming, using three global atmospheric general circulation models (GCMs) and one regional cloud-resolving model (CRM). We find that precipitation is weaker when atmospheric mass is larger for a given surface temperature. Furthermore, the increasing rate of precipitation with increasing surface temperature under a larger atmospheric mass is smaller than that under a smaller atmospheric mass. These behaviors can be understood based on atmospheric or surface energy balance. Atmospheric mass influences Rayleigh scattering, multiple scattering in the atmosphere, pressure broadening, lapse rate, and thereby precipitation strength. These results have important implications on the climate and habitability of early Earth, early Mars, and exoplanets with oceans.
