Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan.
Department of Earth System Science, University of California at Irvine, Irvine, California, USA.
Sci Rep. 2019 Oct 8;9(1):14411. doi: 10.1038/s41598-019-51076-1.
Interbasin interactions have been increasingly emphasized in recent years due to their roles in shaping climate trends and the global warming hiatus in the northern hemisphere. The profound influence from the North Atlantic on the Tropical Pacific has been a primary focus. In this study, we conducted observational analyses and numerical modeling experiments to show that the North Atlantic has also strongly influenced the Extratropical North Pacific. A rapid and synchronous change in the atmospheric and oceanic circulations was observed in the North Pacific during the late 1990s. The change was driven by the transbasin influence from the Atlantic Ocean. During the positive phase of the Atlantic Multidecadal Oscillation (AMO) since the 1990s, the anomalously warm North Atlantic triggers a series of zonally symmetric and asymmetric transbasin teleconnections involving the Inter-tropical Convergence Zone (ITCZ), Walker and Hadley circulations, and Rossby wave propagation that lead to a decrease in wind stress curls over the Pacific subtropics, resulting in an abrupt weakening in the North Pacific subtropical gyre (NPSG) and the Kuroshio Current.
近年来，由于其在塑造气候趋势和北半球全球变暖停滞中的作用，流域间相互作用受到越来越多的关注。北大西洋对热带太平洋的深远影响一直是主要关注点。在这项研究中，我们进行了观测分析和数值模拟实验，以表明北大西洋也强烈影响了北太平洋的温带地区。在 20 世纪 90 年代末，北太平洋的大气和海洋环流出现了快速而同步的变化。这种变化是由大西洋的跨流域影响驱动的。自 20 世纪 90 年代以来，大西洋多年代际振荡（AMO）处于正相位，异常温暖的北大西洋引发了一系列纬向对称和非对称的跨流域遥相关，涉及热带辐合带（ITCZ）、沃克和哈德利环流以及罗斯贝波传播，导致太平洋亚热带地区的风应力卷减弱，从而导致北太平洋副热带环流（NPSG）和黑潮急流的突然减弱。
