Global Surface Layer Salinity Change Detected by Argo and Its Implication for Hydrological Cycle Intensification
Global Surface Layer Salinity Change Detected by Argo and Its Implication for Hydrological Cycle Intensification
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DOI：
10.1007/s10872-009-0049-1
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发表时间：
2009-08-01
影响因子：
2.3
通讯作者：
Mizuno, Keisuke
中科院分区：
文献类型：
--
作者：
Hosoda, Shigeki;Suga, Toshio;Mizuno, Keisuke
通过比较2003-2007年Argo-float数据与世界海洋数据库2005年1960-1989年的年平均气候表层盐度数据，研究了全球表层盐度分布的变化。这两个数据集显示出相似的模式，亚极地和热带地区的值较低，而亚热带地区的值较高。最近的Argo数据表明，除北大西洋次极地外，所有地区的高盐度和低盐度的对比都有所加强。表层盐度对比在2003-2007年保持增强趋势。我们尝试用一种简单的方法，在表层盐度变化的基础上估算蒸发和降水的变化。结果表明，在过去的30年里，全球水文循环很有可能增加。
We investigated changes in the global distribution of surface-layer salinity by comparing 2003-2007 Argo-float data with annual mean climatological surface-layer salinity data for 1960-1989 from the World Ocean Database 2005. The two datasets showed similar patterns, with low values in subpolar and tropical regions and higher values in the subtropics. The recent Argo data indicate that the contrast between low and high salinity has intensified in all areas except the subpolar North Atlantic. The intensified contrast of the surface layer salinity was maintaining for 2003-2007. Using a simple method, we attempted to estimate evaporation and precipitation changes on the basis of surface-layer salinity changes. The results show a high probability that the global hydrological cycle has increased in the past 30 years.