JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (10): 1718-1730.

• Resources Evaluation •

The Characteristics of Wind Speed Variation at Different Altitudes of Boundary Layer in Heilongjiang Province

YU Hong-min1, REN Guo-yu2, LIU Yu-lian1

1. 1. Heilongjiang Climate Center, Harbin 150030, China;
2. Laboratory for Climate Studies, National Climate Center, CMA, Beijing 100081, China
• Received:2012-07-19 Revised:2013-02-05 Online:2013-10-20 Published:2013-10-20
• Contact: 刘玉莲(1974- ),女,高级工程师,主要研究方向为区域气候变化。E-mail:liuyl74@qq.com E-mail:liuyl74@qq.com

Abstract: Using the data of upper air and surface wind speed observed from Harbin, Nenjiang, Qiqihar and Yichun of Heilongjiang Province, from 1961 to 2010, the characteristics of variation of wind speed in boundary layers are analyzed. The following conclusions are drawn: 1) The annual mean wind speed increases with height from the ground to 900 m, and the distribution of wind speed at different time of the year has obvious characteristics of seasonal variation, with the maximum in springtime and the minimum in wintertime at near-surface layer, and the minimum in summertime at the remaining height layers; the maximum wind speed vertical increasing rate appears between 10 m and 300 m. 2) In 1961-2010, the largest mean wind speed at 10 m height is in the 1970s, and gradually decreases from the 1970s to the 2000s, with the smallest value occurring in the 2000s; at 300 m, 600 m, 900 m heights, the largest mean wind speed is in the 1980s, and wind speed gradually reduces from the 1980s to the 2000s, with the smallest value being in the 1960s at 300 m and in the 1970s at 600 m and 900 m. 3) During 1961- 2010, the mean wind speed at 10 m is weakening and the diminishing rate is 0.162 m/(s· 10a), and the trend occurs mainly after the 1970s. At 300 m, 600 m and 900 m, the mean wind speed trends are not significant. 4) It seems that the significant slowdown trends of the surface wind speed in Heilongjiang Province is mostly caused by the fast urbanization and the change of observational environment.

CLC Number:

• P425