Spatiotemporal Variation Of Seawater Temperature In Peripheral Sea Area And Northwest Pacific Ocean

In this paper, using the Joining Area of Asia and Indian-Pacific Ocean Reanalysis data(AIPOcean1.0), developed by the Institute of Atmospheric Physics, Chinese Academy of Sciences. Using the Sen slope estimation and the Mann-Kendall trend test by Matlab software for data visualization, ocean temperature temporal changes in the differentiation characteristics were analyzed to China surrounding waters –the South China sea, East China sea, sea of Japan and the adjacent waters of the Northwest part of Pacific, mainly the following conclusions:(1) 12oN section southern South China Sea ocean temperature trends can be is divided into three layers, the Northwestern Pacific Ocean can be divided into two layers; 19oN section northern South China Sea is divided into four layers, the Northwestern Pacific Ocean is equally divided into two layers layers; 28oN section Kuroshio sea is divided into two layers, the Northwestern Pacific Ocean can be divided into three layers; 41oN section sea of Japan almost only one warming layer, and the northwest Pacific Ocean can be divided into three layers. From south to north, the edge of the sea waters stratification showed decreasing trend, the South China Sea more than the East China Sea Kuroshio, the East China Sea Kuroshio than the Sea of Japan; and the Northwestern Pacific Ocean is manifested in the opposite, gradually increasing stratification.(2) This paper studies four sections, sea surface temperature warming rate is not the maximum level(except 41oN section Northwestern Pacific Ocean) at the surface, roughly between 25-125 m layer. The maximum rate of warming performance of the South China Sea and the Sea of Japan is greater than the Northwest Pacific Ocean, while the Kuroshio Sea is less than the Northwest Pacific Ocean. View from the edge of the sea, the maximum warming rate 41oN section is maximum, followed by 12oN section, again 19oN section, 28oN section is minimum. View from the northwest Pacific Ocean, the difference is not obvious, 19oN, 28oN and 41oN section rate is consistent, 12oN section is the smallest.(3) This paper studies four sections, Ocean temperature cooling rate maximum depth varies, a huge difference. The maximum cooling rate the performance of the South China Sea greater than northwest Pacific Ocean, the Kuroshio Sea and the Sea of Japan is less than the northwest Pacific Ocean. View from the edge of the sea, the maximum cooling rate 19oN section largest, followed by 12oN section, again 28oN section, 41oN section minimum, the trend basic performance of decreases from south to noth. View from the northwest Pacific Ocean, the maximum cooling rate 41oN section largest, followed by 28oN section, again 19oN and 12oN sections, and the trend is just the opposite edge of the sea, the trend performance increases from south to north.(4) Based on average of the marginal sea and the Northwestern Pacific Ocean designated layer ocean temperature anomalies values correlation analysis, 19oN and 28oN section of the edge of the sea and the Northwestern Pacific Ocean temperature were highly correlated, 12oN and 41oN section of the edge of the sea and the Northwestern Pacific Ocean temperature was significantly correlated. Thus, the edge of the sea and the Pacific Northwest water exchange strong correlation coefficient is high, weak water exchange the correlation coefficient is low. Closed and semi-enclosed marginal sea waters affected by the Northwestern Pacific Ocean weaker, on the contrary, the stronger.