Distinct anthropogenic greenhouse gas and aerosol induced marine heatwaves
Distinct anthropogenic greenhouse gas and aerosol induced marine heatwaves
复制标题
DOI：
10.1088/2752-5295/ad13ac
复制
发表时间：
2023-12
期刊：
影响因子：
--
通讯作者：
Xianglin Ren;Wei Liu;Robert J. Allen;Se-Yong Song
中科院分区：
文献类型：
--
作者：
Xianglin Ren;Wei Liu;Robert J. Allen;Se-Yong Song
在气候变化不断升级的时代，了解人类对海洋热浪（MHW）的影响变得至关重要。这项研究利用气候模型的历史和单一强迫模拟，深入研究人为温室气体（GHG）和气溶胶在过去几十年中塑造全球MHW特征的个人作用。结果表明，温室气体的变化导致更持久，更频繁，和激烈的MHW。与此相反，人为气溶胶显着抑制MHWs的强度和增长。对海表温度（SST）概率分布的进一步分析表明，人为温室气体和气溶胶对SST概率分布的尾部有相反的影响，分别导致尾部扩大和收缩。相应地促进和减少了诸如MHW之类的极端气候。我们的研究强调了人为温室气体和气溶胶对MHWs的重大影响，这远远超出了传统的概念，即这些人为强迫通过改变平均状态SST来改变全球SST概率，从而调节极端气候。
In the era of escalating climate change, understanding human impacts on marine heatwaves (MHWs) becomes essential. This study harnesses climate model historical and single forcing simulations to delve into the individual roles of anthropogenic greenhouse gases (GHGs) and aerosols in shaping the characteristics of global MHWs over the past several decades. The results suggest that GHG variations lead to longer-lasting, more frequent, and intense MHWs. In contrast, anthropogenic aerosols markedly curb the intensity and growth of MHWs. Further analysis of the sea surface temperature (SST) probability distribution reveals that anthropogenic GHGs and aerosols have opposing effects on the tails of the SST probability distribution, causing the tails to expand and contract, respectively. Climate extremes such as MHWs are accordingly promoted and reduced. Our study underscores the significant impacts of anthropogenic GHGs and aerosols on MHWs, which go far beyond the customary concept that these anthropogenic forcings modulate climate extremes by shifting global SST probabilities via modifying the mean-state SST.