THE RELATION OF SURFACE HEATING FIELDlS OVER THE QINGHAI-XIZANG PLATEAU TO THE EAST ASIAN CIRCULATION AND THE EARLY SUMMER DROUGHT IN NORTHWEST OF CHINA
According to the indices,the evolution of surface heating field and its relation tothe East Asian circulation and Northwest early summer drought are estimated statistically. Theconclution can be used for a long—range weather forecasting of the early summer drought innorthwest of China.
2)Ultra-long waves at middle and lower latitudes during winter and spring, particularly the positions of ridge-trough ofwavenumber 1 and the intensity of the west wind in March, are well correlated with the precipitation over the basin of the lower Changjiang River in summer and with the summer circulation over East Asia as well.
The influence of snow cover ever Eurasia on the general circulation over East Asia and the weather over Northwest China is analysed with snow cover data of NOAA satellite from 1967 to 1980 and snow cover chart from 1979 to 1984. It is found that atmospheric cooling caused by abnormal snow cover is very clear.
This paper discusses the spatial and temporal characteristics of the convection over the Tibetan Plateau and its association with the circulation over East Asia based on the Black-Body Temperature(TBB) data of Geostationary Meteorological Satellite(GMS) from Japan Meteorological Agency (JMA) and the reanalysis dataset during 19801998 from the NCEP/NCAR reanalysis project.
This paper discusses the spatial and temporal characteristics of the convection over the Tibetan Plateau and its association with the circulation over East Asia based on the Black-Body Temperature(TBB) data of Geostationary Meteorological Satellite(GMS) from Japan Meteorological Agency (JMA) and the reanalysis dataset during 19801998 from the NCEP/NCAR reanalysis project.
In the present paper, some features of the El Nio events during 1991~1995 and the anomalous features of the weather and climate in China and the atmospheric circulation in East Asia have been analyzed based on a variety of data.
The relationships between the snow cover anomalies for half years winter and the distributions of circulation for the following half years summer on continuous evolutions have been investigated by using the rotated extended principal component analysis based on the data of the snow cover in Eurasia and the 500 hPa height anomalies field over East Asia for the period 1973 through 1994,and the possible mechanisms are discussed.
The sea surface temperature(SST) over equatorial eastern Pacific was the most important force factor for the seasonal and annual variation of East Asian monsoon circulation.
These findings also suggest a weakening of the winter monsoon circulation over East Asia.
例句来源
For the purpose of describing objectively the main characteristics of monthly mean circulation at 500rob level and thus establishing the correlation between the circulation at the same level of the middle and lower latitudes and the precipitation in the later part of the period over the basin of the lower Ghangjiang River, monthly mean 500rob height fields are expanded by use of mixed Chebyshev-Fourier polynomials, then the behavior of ultra-long waves is examined and finally these waves are classified in F...
Statistical analysis has shown that there exists the obvious difference between large area and local heavy rain. The characteristics of large area heavy rain are not only great rain-area, rich in vapour moist in whole layer and high potential energy, but also nearly all typhoon-caused. At least, so are nine heavy rains which had the greatest affecting area in Jilin province. The large area heavy rain is in close relationship with background circulation, but the local heavy rain is not. It is found by calcul...
Based on the oblique model scheme provided in the Appendix analysisis made of the teleconnectional structure (TCS) of the January 500 hPacontour field over the Northern Hemisphere, resulting in a series of telecon-nectional patterns representative of the main features of the TCS. Amongthem, the WPAA (Western Pacific/Asia/America ) pattern is found forthe first time to be closely related to the circulation over East Asia. Con-trol analysis indicates that the TCS is highly sensitive to the march ofseasons. Th...