Temporal-spatial Distribution Of The Water Vapor Content And Evolution Character Of Water Vapor During Heavy Rain In Tianshan Mountains

Relation formula was established between water vapor content and groundwater vapor pressure, calculated the water vapor content of the Tianshan mountains,analysis of the temporal and spatial distribution of the water vapor characteristics andthe relationship with the precipitation. Combined with microwave radiometerobservation data, this paper analyzes the summer rain water vapor in the process ofevolution characters, draw the following conclusion:1. Establish a suitable formula of the W=1.6571e for TianShan mountains ofthe water vapor content and ground vapor pressure, the calculation results andsounding result is close, can be used in calculation the water vapor content inTianshan mountain and the surrounding areas.2. The high value of the water vapor content area for Tianshan mountain mainlydistributed in the north Tianshan plain zone and the river valley in Turpan basin, andthe east and middle area of Tianshan mountain is a minimum part, atmosphericmoisture a negative exponent regularity decreasing with height. In the whole time,the water vapor content is showed increasing, summer, autumn increase obviously, in1986has a mutation occurred, have consistency with northwest in climate change.EOF decomposition showed the water vapor content that space field main has twodistribution type in entire district consistency and north-south phase change.3. Water vapor content is one of the factors effects in tianshan mountain area ofprecipitation, atmospheric moisture and precipitation in summer have the most closerelations, rainfall and water vapor in EOF decomposition showed that the first twovector field of similarity high between the distribution of space and time.Precipitation conversion rate greater than the piedmont plain common mountain area,spring rains conversion rate is the largest, followed by winter, autumn is the smallest.4. Water vapor content and other climate change factors also have the certainrelations. Water vapor have negative feedback effect to global warming and climatechange, winter NAO and water vapor have relevant relations, winter AO and summerwater vapor have the most significant correlation.5. The Ili River Basin is the most drenched mountains of tianshan mountainwater vapor, and rainfall in the most, in the spatial distribution of the water vaporcontent on the main performance for the west more than the eastern plains,mountains, the windward side more than more than the characteristics of the leeward slope. Nearly49years is rising and the increase of water vapor mainly in thesummer.6. Microwave remote sensing water vapor is a new type of water vapordetection means, and sounding observation in water vapor contour line for overalltrends are consistent. It showed an obviously daily cycle characteristics for Urumqisummer total water content in the air (PWV), and basically the same withprecipitation change characteristics,.7. The summer rainfall process for PWV and liquid water content in timeevolution has the consistency. Certain water vapor will accumulation beforeprecipitation phase, before the peak jumped high, the peak precipitation general lagwater vapor peak about1hour, in precipitation process PWV changes greatly, whenPWV sharp reduction on the months mean precipitation comes to an end.