渤、黄、东海冬季海表冷暖水舌的时空变化及机理分析
发布时间：2018-10-18 15:03
【摘要】：海表冷暖水舌被广泛应用于定性描述海表水温(SST)的空间分布特征,但缺少定量的表述和研究。本文以海表冷暖水舌轴线的空间位置和温度为指标,用2006—2014年逐年冬季(2月)的遥感SST数据,分析了渤海、黄海和东海冬季的冷暖水舌的空间分布和年际变化,并探讨了其形成机理。结果表明,渤海、黄海和东海冬季存在2条冷水舌和6条暖水舌。水舌位置的EOF前三个模态(73.4%)基本解释了其年际变化,其中空间第一模态呈同相分布,在东海中部及西部的变动幅度最大;空间第二和第三模态主要呈反相分布,分别在九州岛南部及黄海区域变动幅度较大。水舌温度的EOF第一模态(69.6%)呈空间同相分布,变动幅度在渤、黄海较大,在东海南部较小。水舌位置和水舌温度都存在准2~3a周期的年际变化,但只有水舌位置EOF第二模态通过95%水平的显著性检验。海表相对较均匀的负净热通量(海洋向大气输送热量),使得浅水区SST比深水区下降得快,水深(上混合层深度)是冷暖水舌形成的原因之一;平流热输送的空间差异显著且在冷暖水舌区域中的作用最大,在冷舌区域起到降温作用,在暖舌区域起到增温作用,平流热输送是冷暖水舌形成的主要原因。
[Abstract]:Sea surface cold and warm water tongue is widely used to describe the spatial distribution of sea surface water temperature (SST) qualitatively, but it is lack of quantitative description and research. The spatial distribution and interannual variation of the cold and warm water tongue in the Bohai Sea, Huang Hai and the East China Sea in winter are analyzed by using the remote sensing SST data of the winter (February) of 2006-2014 based on the spatial position and temperature of the sea surface cold and warm water tongue axis. The formation mechanism was also discussed. The results show that there are 2 cold water tongue and 6 warm water tongue in Bohai Sea, Huang Hai and East China Sea in winter. The first three modes (73.4%) of the water tongue position explain the interannual variation, and the spatial first mode is the same phase distribution, and the amplitude of variation is the largest in the middle and west of the East China Sea, and the second and third modes are mainly inversely distributed. In the southern part of Kyushu Island and Huang Hai region, the range is larger. The first mode of EOF (69.6%) of the temperature of the water tongue is distributed in the same phase in space. The variation range is larger in the Bohai Sea, larger in Huang Hai, and smaller in the southern part of the East China Sea. The position of the water tongue and the temperature of the water tongue have interannual variations of quasi-2 ~ 3 years period, but only the second mode of the water tongue position EOF passes the 95% level significance test. The relatively uniform negative net heat flux (the heat from the ocean to the atmosphere) makes the SST decrease faster in shallow water than in deep water, and the water depth (upper mixing layer depth) is one of the reasons for the formation of warm and cold water tongue. The spatial difference of advection heat transport is significant and it plays the most important role in the region of cold and warm water tongue, and plays a cooling role in the cold tongue region and a warming effect in the warm tongue region. The advection heat transfer is the main reason for the formation of the cold and warm water tongue.
【作者单位】： 浙江大学海洋学院;卫星海洋环境动力学国家重点实验室;国家海洋局第二海洋研究所;
【基金】：国家重点基础研究发展计划项目资助(2011CB409803) 国家自然科学基金项目资助(41276028)
【分类号】：P731.11
本文编号：2279495
[Abstract]:Sea surface cold and warm water tongue is widely used to describe the spatial distribution of sea surface water temperature (SST) qualitatively, but it is lack of quantitative description and research. The spatial distribution and interannual variation of the cold and warm water tongue in the Bohai Sea, Huang Hai and the East China Sea in winter are analyzed by using the remote sensing SST data of the winter (February) of 2006-2014 based on the spatial position and temperature of the sea surface cold and warm water tongue axis. The formation mechanism was also discussed. The results show that there are 2 cold water tongue and 6 warm water tongue in Bohai Sea, Huang Hai and East China Sea in winter. The first three modes (73.4%) of the water tongue position explain the interannual variation, and the spatial first mode is the same phase distribution, and the amplitude of variation is the largest in the middle and west of the East China Sea, and the second and third modes are mainly inversely distributed. In the southern part of Kyushu Island and Huang Hai region, the range is larger. The first mode of EOF (69.6%) of the temperature of the water tongue is distributed in the same phase in space. The variation range is larger in the Bohai Sea, larger in Huang Hai, and smaller in the southern part of the East China Sea. The position of the water tongue and the temperature of the water tongue have interannual variations of quasi-2 ~ 3 years period, but only the second mode of the water tongue position EOF passes the 95% level significance test. The relatively uniform negative net heat flux (the heat from the ocean to the atmosphere) makes the SST decrease faster in shallow water than in deep water, and the water depth (upper mixing layer depth) is one of the reasons for the formation of warm and cold water tongue. The spatial difference of advection heat transport is significant and it plays the most important role in the region of cold and warm water tongue, and plays a cooling role in the cold tongue region and a warming effect in the warm tongue region. The advection heat transfer is the main reason for the formation of the cold and warm water tongue.
【作者单位】： 浙江大学海洋学院;卫星海洋环境动力学国家重点实验室;国家海洋局第二海洋研究所;
【基金】：国家重点基础研究发展计划项目资助(2011CB409803) 国家自然科学基金项目资助(41276028)
【分类号】：P731.11
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1 沈辉;渤黄东海海表冷暖水舌的时空变化及机理分析[D];浙江大学;2015年
，本文编号：2279495
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