Acta Geographica Sinica ›› 2015, Vol. 70 ›› Issue (3): 392-406.doi: 10.11821/dlxb201503004

• Orginal Article • Previous Articles     Next Articles

Comprehensive evaluation of precipitation heterogeneity in China

Yonglin LIU1(), Junping YAN1(), Minyi CEN1,2   

  1. 1. College of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China
    2. Institute of Healthy Geography, Shaanxi Normal University, Xi'an 710062, China
  • Received:2015-01-14 Revised:2014-02-10 Online:2015-03-20 Published:2015-06-14
  • Supported by:
    National Natural Science Foundation of China, No.41171090;National Social Science Foundation of China, No.14AZD094

Abstract:

Through comparisons of various methods, the method of precipitation concentration degree (PCD) was used to study precipitation heterogeneity. In addition to PCD, normal distribution functions, cumulative frequencies, and percentiles were used to establish a graded evaluation index of precipitation heterogeneity. A comprehensive evaluation of precipitation heterogeneity and its spatiotemporal variation in China in 1960-2013 were analyzed. Results indicated that: (1) seven categories of precipitation heterogeneity could be identified: high centralization, moderate centralization, mild centralization, normal, mild dispersion, moderate dispersion, and high dispersion; (2) during the study period, the precipitation in more parts of China tended to be normal or dispersed, which is beneficial to human activities.

Key words: heterogeneity, precipitation concentration degree, evaluation index, comprehensive evaluation, China