A STUDY OF NEAR SURFACE WIND PROFILES IN THE HEBEI COASTAL AREA BASED ON OBSERVATIONAL EXPERIMENTS

作者：龚玺,朱蓉,李泽椿

摘要：In order to provide wind profiles for the microscale numerical simulation of wind farm with complex terrain, using the 100 m tower atmospheric turbulence observation experiment data in 2010 in Hebei Province offered by National Climate Center,the variation characteristics of wind profile under the different atmospheric stability conditions are analyzed,and the wind profile expression based on the local similarity theory is established.The results show that: (1)In spring,the occurrence probability of unstable stratification in the Hebei coastal area is as high as 28%,and the probability of stable stratification is more than 43% while,in summer,the probability of occurrence of unstable stratification is as high as 80% with a lower probability for stable stratification;and (2)for stable stratification,the characteristics of atmosphere change is dramatic in terms of the vertical direction,which need to be treated layer by layer. According to the atmospheric turbulence observation experiment data above,under stable stratification,the relationship between the dimensionless velocity gradient and the stability ζ can be expressed as 1+βmζ,with βm changing with the height:βm takes 4.1-4.3 under 30m,βm takes 4.6-4.7 between 30-50 in,and βm takes 6.3-6.7 over 50m.

发文机构：Nanjing University of Information Science and Technology China Academy of Meteorological Sciences National Climate Center National Meteorological Center

关键词：WINDprofileATMOSPHERICstabilityclassificationSIMILARITYTHEORYMonin-ObukhovlengthlocalSIMILARITYTHEORY

分类号： P468[天文地球—大气科学及气象学]