Analysis on the information of solar activities impacted on the climate over East China Sea

The information of influence of solar activities in the data series is picked-up by using step-by step filtering and analyzed.It is revealed that the interdecadal variability of the monsoon climate over the East China Sea is very clear and represented in the following aspects.(1) The abrupt change.The atmospheric temperature at the sea level pressure layer and in the troposphere in July (summer) over the East China Sea has under gone a sharp change in the past half century which occurred in July 1978.Since July 1978,a period of persistent high temperature has began after a period of more than 30 a with comparatively low temperature.It lasted until the end of the 20th century.The temperature rising was more than 0.4℃.The data analysis indicates that the atmosphere temperature at all levels in the troposphere over the East China Sea in summer has this interdecadal variability.(2) Persistent increasing of the air temperature at the upper levels of the atmosphere.The atmosphere temperature at the middle part of the stratosphere (10 hPa) over the East China Sea in July (summer) is a persistent process of temperaturer ising with a wave form.The temperature has increased over 4 in the recent more than 50 years.The yearly ratio of the temperature rising is more than 0.075℃/a.The temperature at the bottom of the strato sphere (100 hPa) over the East China Sea also has the characteristic of the persistent rising of the temperature,which has shown a tendency of slowly rising since 1948 and has increased by 1.9℃ in the recent 53 a.The yearly ratio of the temperature rising is 0.036℃/a.(3) The periodicity.The air temperatures at different atmosphere levels over the East China Sea have the interdecadal variability with a 22 a period in various degrees.The amplitudes of the 22 a components rapidly decrease from upper to lower atmosphere levels.This indicates that the 22 a period is clear at the upper air,but not clear at the lower levels.There are also obvious decadal variations with an 11 a period at the middle part of the troposphere and the bottom of the stratosphere over the East China Sea.Based on the analysis,it is known that the 22 a period is caused by the period magnetic variation of the magnetic field of the sunspots.The 11 a period corresponds to the 11 a period of the relative number of the sunspots,and both are the reflection of the solar activity in the atmospheric climate.