Analysis On Interseasonal Oscillation Of Summer Atmospheric Heat Source In Asian Monsoon

The climatic and anomalous characteristics of summer atmospheric heat source in Asian Summer Monsoon and Tibetan Platean are investigated by using the daily atmospheric heat source, data about the entire level atmosphere from the 1000 to 100hPa during the period from 1950 to 2006. On this basis, the basic features of 10-20day oscillation of summer atmospheric heat source in Asian Summer Monsoon Tibetan Platean and Lasa are analyzed especially by using Morlet wavelet and Lanczos filter.And then the relationship between Asian Summer Monsoon and South Asia High,India Low is studied.The effect of atmospheric heat source in Tibetan Platean on summer temperature and precipitation in China is studied too. The main results are as follows:1) Tropical Asian monsoon region has six regional atmospheric heatstable high-value centers are located in the seasonal tropical convergence zone. Tropical regions of the central area of six high heat are the high rate areas; In addition, there are two tropical heat outside the high rate areas, they are located in the Northwest Pacific and near Lake Balkhash.2) Tibetan Plateau and the main zone (3000m above) was significantly lower than the heat source and the variability of tropical convergence zone of the high central area, is the largest Asian monsoon region and the low variability low heat zone. In this century, the plateau in the low intensity of the heat source (an average of close to 0 in Lhasa in summer), it is not obvious as the heat source. Eastern and southwestern plateau of the eat source for the relatively high value area of the east is the high variability of the heat source area.3)10-20d oscillations in the summer heat plateau an importantcomponent of intraseasonal oscillation. It is significant inter-annual changes and changes in the quarter, more than half of the plateaueast of the year 10-20d oscillations significantly, the strongest oscillations occur early in July before the summer season.4) South Asia high, low inter-annual exception of India and the Asian monsoon region (rather than the main plateau area) was significantly related to abnormal heat, pressure and heat of India in South Asia high correlation was stronger. Relevant mainly in the center of the system anomaly and longitudeλ。of the Asian monsoon region over the same period the link between the heat source anomaly, the South Asian high pressure, low pressure center east of India, the heat source anomaly east to west negative, and vice versa.5) Qinghai-Tibet Plateau in spring and summer heat and Summer temperature and precipitation between the broad and complex delay, contact the relevant period, the statistical relationship, especially the mechanism needs further analysis and research.