Precipitation in Northeast Mexico Primarily Controlled by the Relative Warming of Atlantic SSTs
Precipitation in Northeast Mexico Primarily Controlled by the Relative Warming of Atlantic SSTs
复制标题
DOI：
10.1029/2022gl098186
复制
发表时间：
2022-02
影响因子：
5.2
通讯作者：
K. Wright;K. Johnson;Tripti Bhattacharya;Gabriela Serrato Marks;D. McGee;D. Elsbury;Y. Peings;Jean-Louis Lacaille-Múzquiz;Gianna Lum;L. Beramendi-Orosco;G. Magnusdottir
中科院分区：
文献类型：
--
作者：
K. Wright;K. Johnson;Tripti Bhattacharya;Gabriela Serrato Marks;D. McGee;D. Elsbury;Y. Peings;Jean-Louis Lacaille-Múzquiz;Gianna Lum;L. Beramendi-Orosco;G. Magnusdottir
重建平方纪的水文气候对于理解降水变化的主要机制和改进气候模式预测至关重要，目前气候模式预测表明墨西哥东北部未来将变得更加干燥。树木年轮重建表明，区域降雨主要受太平洋海面温度（SSTs）的控制。然而，树木年轮记录倾向于反映冬季-春季降雨量，因此可能无法准确记录年总降水量。利用跨越过去千年的第一个多代理洞穴记录，结合大气环流模式的结果，我们证明墨西哥东北部的年平均降雨量对大西洋海温变率高度敏感。我们的研究结果表明，相对于热带太平洋，墨西哥东北部未来的降水更依赖于热带大西洋海温的变暖。
Reconstructing hydroclimate over the Common Era is essential for understanding the dominant mechanisms of precipitation change and improving climate model projections, which currently suggest Northeast Mexico will become drier in the future. Tree‐ring reconstructions have suggested regional rainfall is primarily controlled by Pacific sea‐surface temperatures (SSTs). However, tree ring records tend to reflect winter‐spring rainfall, and thus may not accurately record total annual precipitation. Using the first multiproxy speleothem record spanning the last millennium, combined with results from an atmospheric general circulation model, we demonstrate mean annual rainfall in Northeast Mexico is highly sensitive to Atlantic SST variability. Our findings suggest future precipitation in Northeast Mexico is more dependent upon the warming of Tropical Atlantic SSTs relative to the Tropical Pacific.