Mass-induced sea level variations in the Gulf of Carpentaria

Mass-induced sea level variations in the Gulf of Carpentaria
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卡奔塔利亚湾质量引起的海平面变化

DOI:
10.1007/s10872-015-0304-6
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发表时间:
2015-06
影响因子:
2.3
通讯作者:
Cheng, Xuhua
Cheng, Xuhua
中科院分区:
地球科学4区
文献类型:
--
作者:
Wang, Juan;Wang, Jing;Cheng, Xuhua

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在这项工作中,质量引起的海面高度(SSHmass,洋底压力)在卡奔塔利亚湾的变化进行了调查,在季节性到十年的时间尺度上使用测高数据,重力恢复和气候实验(GRACE)的估计,和空间海面高度测量来自次表层温度和盐度分析。海湾平均SSHmass的季节变化可归因于当地风强迫。在年际和年代际时间尺度上,SST是影响海平面高度的主导因子,并与厄尔尼诺南方涛动(ENSO)和太平洋年代际涛动(PDO)等大尺度模态有关。从西太平洋传播的海浪和相应的深海和浅卡奔塔利亚湾之间的水交换,而不是当地的风变率与气候模式,是负责SSHmassin海湾的低频变化。在2003-2011年期间,SSH质量以约8.0 ± 1.5 mm/年的速度上升,PDO占海湾尺度质量变化的约65%。
In this work, variations in mass-induced sea surface height (SSHmass, ocean bottom pressure) in the Gulf of Carpentaria are investigated on seasonal to decadal timescales using altimetry data, Gravity Recovery and Climate Experiment (GRACE) estimates, and steric sea surface height measurements derived from subsurface temperature and salinity analyses. Seasonal variability in gulf-mean SSHmasscan be attributed to local wind forcing. On an interannual and decadal timescale, SSHmassis the dominant factor affecting total sea surface height, and is related to large-scale modes such as the El Niño Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO). Oceanic waves propagating from the western Pacific and the corresponding water exchange between the deep ocean and the shallow Gulf of Carpentaria, rather than local wind variability associated with climate modes, are responsible for the low-frequency variations in SSHmassin the gulf. Over 2003–2011, SSHmassrose at a rate of about 8.0 ± 1.5 mm/year, and the PDO accounted for about 65 % of gulf-scale mass variation.
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发表时间: 2010-11
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