Decadal trends of the upper ocean salinity in the tropical Indo-Pacific since mid-1990s.
Decadal trends of the upper ocean salinity in the tropical Indo-Pacific since mid-1990s.
复制标题
20世纪90年代中期以来热带印度洋-太平洋上层海洋盐度的年代际趋势
DOI：
10.1038/srep16050
复制
发表时间：
2015-11-02
影响因子：
4.6
通讯作者：
Wijffels S
中科院分区：
文献类型：
--
作者：
Du Y;Zhang Y;Feng M;Wang T;Zhang N;Wijffels S
2004-2013年，热带西太平洋（WTP）和热带东南印度洋（SETIO）表层海水盐度变化呈现出明显的对比趋势，WTP表层海水盐度显著增加，SETIO表层海水盐度显著变淡。在这项研究中，我们表明，海洋大陆（MC）周围的降水增加，降水减少，在热带太平洋中西部，海洋平流过程有助于该地区的盐度趋势。从更长的历史记录来看，这些盐度趋势始于20世纪90年代中期，比1998年至今的全球变暖中断早几年。盐度趋势与热带印度洋-太平洋上空步行者环流的加强趋势有关，这扭转了全球变暖导致的热带印度洋-太平洋长期盐度变化。了解热带印度洋-太平洋SSS的年代际变化将更好地了解热带水文循环将如何受到自然变率和气候变暖的影响。
A contrasting trend pattern of sea surface salinity (SSS) between the western tropical Pacific (WTP) and the southeastern tropical Indian Ocean (SETIO) is observed during 2004–2013, with significant salinity increase in the WTP and freshening in the SETIO. In this study, we show that increased precipitation around the Maritime Continent (MC), decreased precipitation in the western-central tropical Pacific, and ocean advection processes contribute to the salinity trends in the region. From a longer historical record, these salinity trends started in the mid-1990s, a few years before the Global Warming Hiatus from 1998 to present. The salinity trends are associated a strengthening trend of the Walker Circulation over the tropical Indo-Pacific, which have reversed the long-term salinity changes in the tropical Indo-Pacific as a consequence of global warming. Understanding decadal variations of SSS in the tropical Indo-Pacific will better inform on how the tropical hydrological cycle will be affected by the natural variability and a warming climate.