How Does the North Atlantic SST Pattern Respond to Anthropogenic Aerosols in the 1970s and 2000s?
How Does the North Atlantic SST Pattern Respond to Anthropogenic Aerosols in the 1970s and 2000s?
复制标题
DOI：
10.1029/2020gl092142
复制
发表时间：
2021-04-16
影响因子：
5.2
通讯作者：
Putrasahan, D.
中科院分区：
文献类型：
--
作者：
Fiedler, S.;Putrasahan, D.
我们展示了人为气溶胶的全球分布变化如何有利于北大西洋海表温度（NASST）的不同空间格局。NASST在很大程度上显示了20世纪70年代与人为气溶胶相关的预期减少，但也显示了北大西洋暖洞区域东次极地环流的异常变暖响应。2000年代与20世纪70年代相比，NASST对人为气溶胶的响应发生逆转。人为气溶胶的区域减少有利于：（1）变暖洞的加强和（2）与耦合的大气-海洋动力学变化相关的高纬度NASST增加。我们发现，在中高纬度地区的北大西洋热输送的环流组件是一个重要的驱动力与NASST模式的热辐合。MPI-ESM 1.2中至少有三分之二的NASST响应与气溶胶-云相互作用有关，这突出了更好地理解它们的必要性。
We show how changes in the global distribution of anthropogenic aerosols favor different spatial patterns in the North Atlantic sea-surface temperature (NASST). The NASSTs largely show the expected decrease associated with the anthropogenic aerosols in the 1970s, but also an unusual warming response in the eastern sub-polar gyre, the region of the North Atlantic warming hole. The NASST response reversed for the anthropogenic aerosols in the 2000s against 1970s. The regional reduction in anthropogenic aerosols favored as follows: (1) a strengthening of the warming hole and (2) a NASST increase at high latitudes associated with changes in the coupled atmosphere-ocean dynamics. We found that the gyre component of the northward Atlantic heat transport in mid-to high latitudes is an important driver for the heat convergence associated with the NASST patterns. At least two-thirds of the NASST response in MPI-ESM1.2 is associated with aerosol-cloud interactions, highlighting the need to better understand them.