Variation Characteristics of Meteorological Elements,Radiation and Energy Budget Components before and after the Rainy Season in the Surface Layer of Mt. Qomolangma Area
ZHONG Lei1-3,MA Yao-ming1,SU Z.(Bob)3,WANG Yong-jie1,L Ya-qiong1,ZHU Zhi-kun1(1.Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China;2.Chengdu Institute of Plateau Meteorology,China Meteorological Administration,Chengdu 610071,China;3.International Institute for Geo-Information Science and Earth Observation,Enschede 7500,the Netherlands)
Based on an eddy covariance measurement system set up at 4475 m on the northern slope of Mt.Qomolangma area,consecutive observation of atmospheric condition in Quzong was conducted.The variation characteristics of meteorological elements,radiation and energy budget components during the before rainy season(May),in rainy season(July) and after rainy season(November) season are analyzed.The results show that the diurnal mean variation of air temperature and relative humidity has one-peak-one-vale pattern.However,the diurnal mean variation is two-peak-two-vale for air pressure and one-peak pattern for wind speed.The wind speed always increases greatly in the afternoon.With the onset of Southwest monsoon,the air temperature,relative humidity,air pressure increase together with the decreasing of wind speed.The main wind direction changed from Northeast(NE) to Southwest(SW).In the before and after rainy season,there are also some clear variation trends for radiation and energy budget components.