Pedosphere 15(5): 585--594, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Interannual and interdecadal variability of atmospheric water vapor transport in the Haihe River Basin |
WEI Jie1 , LIN Zhao-Hui1, XIA Jim2 and TAO Shi-Yan1 |
1 Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 (China). E-mail: wjie@mail.iap.ac.cn
2 Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100044 (China) |
| ABSTRACT |
| The seasonal mean atmospheric precipitable water and water vapor transport over the Haihe River Basin (HRB) in North China with a focus on their interannual to interdecadal variability, and then the relationships of the interannual and interdecadal variability of the water cycle over the HRB to the Pacific Decadal Oscillation (PDO) and El Nino-Southern Oscillation (ENSO) phenomena were investigated using the observational and National Centers for Environmental Prediction (NCEP) reanalysis data. There was a strong interdecadal variability for the water cycle (such as precipitation and water vapor transport) over the region, with an abrupt change occurring mostly in the mid 1970s. The intensity of the East Asian summer monsoon largely affected the atmospheric water vapor transport. Generally, the net meridional convergence of the water vapor flux over the region was relatively large before 1965, and it declined gradually from then on with a further notable decrease since mid 1970s. Zonal water vapor transport was similar to meridional, but with a much smaller magnitude and no noteworthy turning in the mid 1970s. Results also suggested that the wind field played an important role in the water vapor transport over the HRB before the mid 1960s, and the interdecadal variability of the water cycle (precipitation, water vapor transport, etc.) in the summer was related to the PDO; however, interannual variation of the water vapor transport could also be related to the ENSO phenomena. |
| Key Words: interannual variability, interdecadal variability, Haihe River Basin, water vapor transport |
| Citation: Wei, J., Lin, Z. H., Xia, J. and Tao, S. Y. 2005. Interannual and interdecadal variability of atmospheric water vapor transport in the Haihe River Basin. Pedosphere. 15(5): 585-594. |
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