基于均一化观测序列的成山头海表温度气候变化特征分析

Climate Change Analysis of Sea Surface Temperature in Chengshantou Based on Homogenized Observatony Array

文中利用加拿大环境部气候研究中心研发的惩罚最大t检验方法,选取均一的邻近气象站为参考站,结合元数据信息,对1960-2017年成山头海洋站海表温度序列进行了均一性检验与订正。利用订正后的海表温度序列对成山头海温气候变化特征进行分析。结果表明,订正前后年平均海表温度趋势发生了明显改变,表现出海温上升趋势较订正前加强的特征,增暖趋势由订正前的0.04℃/10 a上升到0.15℃/10 a,其中最暖的5个年份多发生在1980年以后,分别为1973年、1989年、2002年、2007年和2017年。海表温度总体呈显著上升趋势和明显的年代际波动,20世纪60年代至80年代末为偏冷阶段,之后开始增暖,20世纪90年代至今为偏暖阶段。1960-2017年,成山头的海温突变点在1987年,是一次增暖性突变,与中国大陆的气温突变特征和气温变化阶段性特征非常一致。

The observational sea surface temperature(SST)data obtained from 1960 to 2017 of the Chengshantou marine station have been detected and adjusted by the Penalized Maximal t test(PMT)developed by the Climate Research Center of the Environment Ministry of Canada,and the detailed metadata archive.In this study,the homogenous surface air temperature(SAT)data from neighboring meteorological observation stations are used to construct the reference series by correlation coefficient weighted averaged method.The climate change characteristics of Chengshantou SST were analyzed using the homogenized data.Results show that the annual average SST trend has changed significantly before and after the homogenization.The warming trend increased from 0.04°C/10 a before revision to 0.15°C/10 a.The warmest five years occurred mostly after 1980,that is,1973,1989,2002,2007 and 2017.SST generally showed a significant upward trend and significant inter-decadal fluctuations.From the 1960s to the end of the 1980s,it was a colder stage,and then began to warm up.It was a warmer period from the 1990s to the present.From 1960 to 2017,the jump point occurred in 1987,which is very consistent with the temperature characteristics of the continent of China.