Mass‐induced sea level change in the northwestern North Pacific and its contribution to total sea level change
Mass‐induced sea level change in the northwestern North Pacific and its contribution to total sea level change
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DOI：
10.1002/grl.50748
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发表时间：
2013-08
影响因子：
5.2
通讯作者：
Xuhua Cheng;Lijuan Li;Yan Du;Jing Wang;R. Huang
中科院分区：
文献类型：
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作者：
Xuhua Cheng;Lijuan Li;Yan Du;Jing Wang;R. Huang
2003年至2011年期间，重力恢复和气候实验（GRACE）卫星对揭示了北太平洋西北部质量引起的海面高度（MSSH）的显着变化。 MSSH 与观测到的总海面高度 (SSH) 之间存在显着相关性，表明该地区正压变异性的重要性。 2003-2011年期间，MSSH以6.1±0.7毫米/年的速度上升，这对SSH上升（8.3±0.7毫米/年）有显着贡献。基于国家环境预测中心/国家大气研究中心再分析产品GRACE和测高数据对正压涡度方程的分析表明，MSSH信号主要是由与反气旋性大气环流异常相关的负风应力旋度引起的。回归分析表明，MSSH和地面风的趋势与太平洋十年涛动有关，其指数在过去十年中呈下降趋势。
Over the period 2003–2011, the Gravity Recovery and Climate Experiment (GRACE) satellite pair revealed a remarkable variability in mass‐induced sea surface height (MSSH) in the northwestern North Pacific. A significant correlation is found between MSSH and observed total sea surface height (SSH), indicative of the importance of barotropic variability in this region. For the period 2003–2011, MSSH rose at a rate of 6.1 ± 0.7 mm/yr, which has a significant contribution to the SSH rise (8.3 ± 0.7 mm/yr). Analysis of the barotropic vorticity equation based on National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis product, GRACE, and altimetry data suggests that the MSSH signal is primarily caused by negative wind stress curl associated with an anomalous anticyclonic atmospheric circulation. Regression analysis indicates that trends in MSSH and surface wind are related to the Pacific Decadal Oscillation, whose index had a decreasing trend in the last decade.