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Analysis of monthly variability of thermocline in the South China Sea 被引量:2
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作者 peng hanbang PAN Aijun +1 位作者 ZHENG Quan'an HU Jianyu 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第2期205-215,共11页
This study analyzes monthly variability of thermocline and its mechanism in the South China Sea (SCS). The study is based on 51-year (1960-2010) monthly seawater temperature and surface wind stress data from Simpl... This study analyzes monthly variability of thermocline and its mechanism in the South China Sea (SCS). The study is based on 51-year (1960-2010) monthly seawater temperature and surface wind stress data from Simple Ocean Data Assimilation (SODA), together with heat flux, precipitation and evaporation data from the National Centers for Environmental Prediction (NCEP), the National Oceanic and Atmospheric Administration (NOAA) and the Woods Hole Oceanographic Institution, respectively. The results reveal that the upper boundary depth (Zup), lower boundary depth (Zlow), thickness (AZ) and intensity (Tz) of thermocline in the SCS show remarkable monthly variability. Being averaged for the deep basin of SCS, Zup deepens gradually from May to the following January and then shoals from February to May, while Zow varies little throughout the whole year. Further diagnostics indicates that the monthly variability of Zup is mainly caused by the buoyancy flux and wind stress curl. Using a linear method, the impacts of the buoyancy flux and wind stress curl on Zup can be quantitatively distinguished. The results suggest that Zup tends to deepen about 4.6 m when the buoyancy flux increases by 1 × 10.5 kg/(m·s3), while it shoals about 2.5 m when the wind stress curl strengthens by 1 × 10-7 N/m3. 展开更多
关键词 South China Sea THERMOCLINE upper boundary depth buoyancy flux wind stress curl
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基于海洋调查实测资料的中尺度涡旋识别结果的验证及边界拟合技术 被引量:1
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作者 彭汉帮 王金虎 +1 位作者 吴克亮 杨春辉 《海洋学报》 CAS CSCD 北大核心 2021年第1期61-68,共8页
结合卫星高度计资料,本文在海洋中尺度涡旋综合识别法(综合法)的基础上,利用实测资料对识别的涡旋边界和中心点进行比对验证,得出以下结论:(1)通过诊断涡旋识别的边界切线与实测海流矢量的夹角,结果表明综合法识别的涡旋边界形态基本可... 结合卫星高度计资料,本文在海洋中尺度涡旋综合识别法(综合法)的基础上,利用实测资料对识别的涡旋边界和中心点进行比对验证,得出以下结论:(1)通过诊断涡旋识别的边界切线与实测海流矢量的夹角,结果表明综合法识别的涡旋边界形态基本可以反映实测涡旋的水平形态;(2)利用实测海流和温度资料反演涡旋中心,通过与综合法识别的涡旋中心进行比对,结果显示涡旋识别的中心位置与反演的涡旋中心位置基本吻合。此外,通过比对圆与椭圆对识别涡旋的边界拟合效果,结果显示椭圆拟合准确率高于圆拟合准确率。 展开更多
关键词 中尺度涡 涡旋识别 圆拟合 椭圆拟合
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A study of response of thermocline in the South China Sea to ENSO events
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作者 peng hanbang PAN Aijun +1 位作者 ZHENG Quan'an HU Jianyu 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第4期1166-1177,共12页
This paper investigates the response of the thermocline depth(TD) in the South China Sea(SCS) to the El Ni?o-Southern Oscillation(ENSO) events using 51-year(from 1960 to 2010) monthly seawater temperature and surface ... This paper investigates the response of the thermocline depth(TD) in the South China Sea(SCS) to the El Ni?o-Southern Oscillation(ENSO) events using 51-year(from 1960 to 2010) monthly seawater temperature and surface wind stress data acquired from the Simple Ocean Data Assimilation(SODA), together with heat flux data from the National Centers for Environmental Prediction(NCEP), precipitation data from the National Oceanic and Atmospheric Administration(NOAA) and evaporation data from the Woods Hole Oceanographic Institution(WHOI). It is indicated that the response of the SCS TD to the El Ni?o or La Ni?a events is in opposite phase. On one hand, the spatial-averaged TDs in the SCS(deeper than 200 m) appear as negative and positive anomalies during the mature phase of the El Ni?o and La Ni?a events, respectively. On the other hand, from June of the El Ni?o year to the subsequent April, the spatial patterns of TD in the north and south of 12°N appear as negative and positive anomalies, respectively, but present positive and negative anomalies for the La Ni?a case. However, positive and negative TD anomalies occur almost in the entire SCS in May of the subsequent year of the El Ni?o and La Ni?a events, respectively. It is suggested that the response of the TD in the SCS to the ENSO events is mainly caused by the sea surface buoyancy flux and the wind stress curl. 展开更多
关键词 South China Sea (SCS) thermocline depth El Nifio-Southern Oscillation (ENSO) buoyancy flux wind stress curl
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