INFLUENCE OF WATER VAPOR ON ATMOSPHERIC GRAVITY LOADING EFFECT
Jiang Wei 1,2) ; Luo Shaocong 1,3) ;and Sun Heping 1)
1)Key Laboratory Dynamic Geodesy,Institute of Geodesy and Geophysics,CAS,Wuhan 4300772)Graduate University of Chinese Academy of Science,Beijing 1000493)Key Lavoratory of Geospace Enviroment & Geodesy of Ministry of Education,WHU,Wuhan 430072
Abstract The air contains water vapor which has influences on air density. Therefore, when we correct the atmospheric loading effect of the gravity observations, we need to consider the influence of water vapor. Former researches did not analyze the influence of water vapor quantitatively. We construct a water vapor influence model and take Wuhan superconducting gravity observation for example, according to the radio sounding data in Wuhan district, calculate the influence of water vapor accurately. The result shows that the influence of water vapor to gravity observation can reach to 1.6×10 -8 ms -2, which means that the influence of water vapor on the precise gravity survey should not be ignored.
