Decadal Shift of the Extreme High Temperature in China and Its Relationship with Sea Surface Temperature
Based on daily observation temperatures data of 730 stations with 50 year series from 1961 to 2010,we have studied the temporal and spatial distribution characteristics of extreme "high temperature" events and explore its relation with the sea surface temperature.It was showed that the frequency of extreme high temperature events had an obvious increase trend,but it differed in different area.It increased more quickly in the north and southwest but relatively slow in the south,it even decreased in some areas.The change of the frequency had a significant decadal mutation from the end of 1990s to the beginning of the 21st century.Based on empirical orthogonal function (EOF) analysis,there are two leading modes:the consistent mode (first mode) and the concussion of the north and south mode (second mode).The variance contribution rates are 18.8％ and 17.2％ respectively and reflect two decadal transition characteristics in the end of 1990's and the beginning of 21st century.The first mode is mainly related to Atlantic Multidecadal Oscillation and change of the Indo-Pacific warm pool.The second mode is mainly related to the transition of positive and negative phase about AMO and ENSO.
China extreme high temperaturespatial and temporal distributionENSO
国家科技期刊平台
NSTL
万方数据
维普
