2021 年诺贝尔物理学奖授予了两位气候学家和一位理论物理学家，以表彰他们在“ 理解复杂物理系统领域所做出的开创性贡献”. 相信很多人会感到惊讶，为什么诺贝尔物理学奖授予了两位气候学家. 本文将从以下几方面给予解读：为什么气候系统被称为复杂的物理系统，全球变暖的现状和未来，全球变暖的物理基础和科学简史，两位气候学家是如何基于基础物理理论建立了预测全球变暖的模型，以及检测和归因人类活动导致全球变暖的方法.

The 2021 Nobel Prize in Physics is awarded to two climatologists and a theoretical physicist “for groundbreaking contributions to our understanding of complex physical systems”. Many of us would be surprised why two climatologists win the Nobel Prize in Physics. Here I present you my reading of the 2021 Nobel Prize in Physics, by addressing the following aspects: why is the climate system is called a complex physical system? The global greenhouse warming in the past century and possible future warming. The physical basis and brief history of global greenhouse warming. What are the contributions of the two climatologists, based on physical principles, to modeling of Earth climate, quantifying climate variability, reliably predicting global warming, and detecting and attributing global warming to anthropogenic activity.