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Basin patterns of upper ocean warming for 1993-2009

机译:1993-2009年高空增暖的盆地格局

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A previous study (Lyman et al., Nature 465:334-337, 2010) showed a robust warming signal of the global upper ocean (0-700 m). They examined several sources of uncertainty that contribute to differences among heat content estimations. However, their focus was limited to globally averaged estimation. This study presents the spatial pattern of the global heat content change based on observed gridded datasets (Levitus et al., Geophys Res Lett 36:L07608, 2009). The western Pacific, Atlantic, and Indian Oceans showed significant warming trends, whereas eastern Pacific and some areas of the Gulf Stream experienced negative trends during 1993-2009. Steady wanning trend was obtained from the first EOF mode when El Nino and Southern Oscillation (ENSO)-related signals were removed. This result implies that the rapid increase in heat content of the upper ocean around 2000-2005 is not related to a sampling transition from XBT to Argo observations but is associated with a natural variability dominated by strong ENSO-related signals.
机译:先前的研究(Lyman等人,Nature 465:334-337,2010)显示了全球上层海洋(0-700 m)的强烈变暖信号。他们研究了几种不确定性来源,这些不确定性导致热量含量估算之间的差异。但是,他们的重点仅限于全球平均估计。这项研究基于观察到的网格化数据集,提出了全球热量含量变化的空间格局(Levitus等,Geophys Res Lett 36:L07608,2009)。西太平洋,大西洋和印度洋显示出明显的变暖趋势,而东太平洋和墨西哥湾流的某些地区在1993-2009年期间则出现了负趋势。当消除厄尔尼诺和南方涛动(ENSO)相关信号时,从第一个EOF模式获得了稳定的下降趋势。该结果表明,在2000-2005年期间,上层海洋热量的快速增加与从XBT观测到Argo观测的采样过渡无关,但与强烈的ENSO相关信号主导的自然变化有关。

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