A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion
A twentieth century perspective on summer Antarctic pressure change and variability and contributions from tropical SSTs and ozone depletion
复制标题
二十世纪对夏季南极气压变化和变异性以及热带海温和臭氧消耗的贡献的展望
DOI：
10.1002/2017gl075079
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发表时间：
2017
影响因子：
5.2
通讯作者：
Hallie E. Dusselier
中科院分区：
文献类型：
--
作者：
R. Fogt;Chad A. Goergens;Julie M. Jones;D. Schneider;J. Nicolas;D. Bromwich;Hallie E. Dusselier
在二十世纪后期，南极大气环流通过包括绕极西风向极地移动等过程改变并显著影响了整个南极气候。然而，关于1979年前南极大陆上空大气压力的全部空间模式，人们知之甚少。在这里，我们研究了整个南极大陆自1905年以来的地面气压变化，建立了一个新的60°S夏季气压重建极。我们发现，只有整个东南极最近的气压明显低于20世纪初的气压；我们还发现了20世纪初南极沿海南大西洋部分的显著正气压趋势。气候模式模拟显示，热带海面温度变率和其他辐射强迫机制，除了臭氧消耗外，在推动最近观察到的负趋势方面发挥了重要作用。
During the late twentieth century, the Antarctic atmospheric circulation has changed and significantly influenced the overall Antarctic climate, through processes including a poleward shift of the circumpolar westerlies. However, little is known about the full spatial pattern of atmospheric pressure over the Antarctic continent prior to 1979. Here we investigate surface pressure changes across the entire Antarctic continent back to 1905 by developing a new summer pressure reconstruction poleward of 60°S. We find that only across East Antarctica are the recent pressures significantly lower than pressures in the early twentieth century; we also discern periods of significant positive pressure trends in the early twentieth century across the coastal South Atlantic sector of Antarctica. Climate model simulations reveal that both tropical sea surface temperature variability and other radiative forcing mechanisms, in addition to ozone depletion, have played an important role in forcing the recent observed negative trends.
影响因子：
8
作者：
Raphael, M. N.;Marshall, G. J.;Hobbs, W. R.
通讯作者：
Hobbs, W. R.