Purpose of Review

This paper reviews the self-aggregation of deep convection, its impact on the large-scale environment, its dependence on surface temperature, and its implications for climate.

Recent Findings

Self-aggregation generates significant humidity variability, dries the mean state, reduces high cloud cover, and increases the ability of the atmosphere to cool to space. Some studies find that convection is more self-aggregated at warmer temperatures but other studies, or other ways of measuring the degree of self-aggregation, disagree. There is not a simple, monotonic relationship between self-aggregation and surface temperature.

Summary

Self-aggregation, through its effect on the humidity distribution and radiative budget, can affect climate. However, there is uncertainty over how strong the modulation of climate by self-aggregation is, in part because of the ambiguity over its temperature dependence. There are some indications that self-aggregation may modestly reduce climate sensitivity even without a dramatic temperature dependence, but more research is needed to understand this behavior.

中文翻译：

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深对流的自聚集及其对气候的影响

审查目的

本文回顾了深对流的自聚集，对大尺度环境的影响，对地表温度的依赖性及其对气候的影响。

最近的发现

自聚集会产生明显的湿度变化，使平均状态变干，减少高云量，并增加大气层冷却至太空的能力。一些研究发现对流在温度较高时更容易自聚集，但其他研究或其他测量自聚集程度的方法则不同。自聚集与表面温度之间没有简单的单调关系。

概要

自聚集通过影响湿度分布和辐射预算，可以影响气候。但是，由于自身聚集对气候的调节强度有多强，因此存在不确定性，部分原因是对温度的依赖性不明确。有迹象表明，即使没有显着的温度依赖性，自聚集也可能会适度降低气候敏感性，但是需要更多的研究来了解这种行为。