基于卫星观测安徽淮北地区水汽分布特征研究

Water vapour distribution characteristics of Huaibei area in Anhui Province based on satellite observation

为合理评估水汽资源,利用大气红外探测仪(AIRS)和先进微波探测器(AMSU)联合反演的2006―2015年AIRSL2标准反演产品AIRX2RETV006,研究了安徽淮北地区水汽分布和变化特征,重点分析了该地区整层大气可降水量和若干层累积水汽月均值、季均值的年际变化,以及水汽和温度的关系。研究发现:从2006年到2015年这10年间,淮北地区月平均整层大气可降水量呈现逐年减小的趋势。1000~850、850~500和500~100hPa层累积水汽和整层大气可降水量四季分布一致,呈现夏季>秋季>春季>冬季。四季整层大气可降水量与三层累积水汽年际变化也呈现出较高的一致性,表现为夏季逐年变化相对较大,呈线性减小趋势;秋季次之,除500~100hPa层外,在2006至2011年期间呈现逐年线性增大趋势;春、冬两季年际变化相对较小,且无明显的线性关系。

In order to reasonably evaluate water vapor resources,the distribution and variation characteristics of water vapour in Huaibei region of Anhui Provice,China,from 2006 to 2015 were studied using AIRS Level 2 Standard Physical Retrieval V006 data,a joint inversion product from atmospheric infrared detectors(AIRS)and advanced microwave detectors(AMSU).Interannual variations of monthly and seasonal average characteristics of total precipitable water vapour and integrated water vapour of different layers(viz.1000-850,850-500 and 500-100 hPa)were mainly analyzed,as well as the relationship between temperature and water vapour.The results show that monthly average of total precipitation water vapour over the Huaibei area shows a decreasing trend year by year from 2006 to 2015.The seasonal distributions of the layer integrated water vapour in 1000-850,850-500 and 500-100 hPa are consistent with that of total precipitable water vapour,showing the trend of summer>autumn>spring>winter.The interannual variations of the layer integrated water vapour in 1000-850,850-500 and 500-100 hPa are also consistent with that of the total precipitable water vapour.And the largest annual variation appears in summer with a linear decreasing trend,followed by autumn with a increasing linearly year by year from 2006 to 2011 except for 500-100 hPa layer.The interannual variation of spring and winter is relatively small,and there is no significant linear relationship.