JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (7): 1163-1171.doi: 10.11849/zrzyxb.2015.07.009

• Resource Evaluation • Previous Articles     Next Articles

The Characteristics of the Moist Pool over the Tibet Plateau Based on ERA-Interim Data

XIE Qi-yu1,2, GONG Yuan-fa1, YANG Rong1, LIAN Fan1   

  1. 1. Chengdu University of Information Technology, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu 610225, China;
    2. Qinghai Province Haibei State Observatory, Xihai 810200, China
  • Received:2014-06-24 Revised:2014-12-31 Online:2015-07-20 Published:2015-07-14

Abstract:

The regional distribution characteristics of high precipitable water vapor centers (the Moist Pool) over the Tibet Plateau are analyzed with two reanalysis datasets of ERA-Interim (0.5° × 0.5° ) and NCEP/NCAR2 (2.5° × 2.5° ) and sonde observation data. Then the variation characteristics of the Moist Pool are analyzed by using ERA data, and some new facts are found. The high water vapor centers, which are the Moist Pools, exist both in summer (July) and winter (January) in the middle-upper layer of troposphere. The Moist Pool has the strongest intensity in July. In addition to the existence of continuous wet centers of precipitable water vapor over the southern highlands of the Plateau, there is a wet center over the northwestern part of the Plateau as shown by ERA data. But NCEP2 data show that wet centers only exist over the southeastern and southwestern areas of the Plateau by. In January, both data show there are wet centers only over the southeast of the Plateau. In general, the wet centers shown by the ERA data is more close to those detected by sonde observation. The intensity of the centers over the southern highlands has kept been strong since the mid-1990s (1994-1996), while the northwest center has alternately been weak-strong-weak-strong. In January, the centers have continuously been strong since the late1980s. The high water vapor centers over the southern region of the Plateau are almost a continuous area in July, and this feature is more obvious since 1996, but there are two wet zones in January.

Key words: the Moist Pool over the Tibet Plateau, atmospheric precipitable water vapor, ERAInterim data

CLC Number: 

  • P426