Spectral characteristics of turbulence in the hurricane boundary layer over the ocean between the outer rain bands

被引:39
作者
Zhang, Jun A. [1 ]
机构
[1] NOAA, AOML, Hurricane Res Div, Miami, FL 33149 USA
关键词
spectra; universal spectral curves; turbulent fluxes; HIGH-RESOLUTION SIMULATIONS; TROPICAL CYCLONE CORE; IN-SITU OBSERVATIONS; SURFACE-LAYER; PART II; POTENTIAL INTENSITY; VELOCITY SPECTRA; WIND STRUCTURE; MOMENTUM FLUX; SENSIBLE HEAT;
D O I
10.1002/qj.610
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Spectra and cospectra of wind velocity, potential temperature and humidity have been analysed using data collected in the atmospheric boundary layer in Hurricanes Fabian (2003) and Isabel (2003) during the Coupled Boundary Layer Air Sea Transfer (CBLAST) - Hurricane experiment. The spectra and cospectra are normalized following the surface layer scaling methods according to similarity theory. It is found that the CBLAST data gathered in the mixed layer between the outer rain bands below 400 m can be grouped into well-defined curves for spectra of wind velocity, potential temperature and humidity, and for cospectra of momentum and humidity flux. However, the cospectra of sensible heat flux do not exhibit well-defined universal shape. The CBLAST universal shape spectra and cospectra generally resemble the shapes of those from previous studies, but shift to higher frequencies that correspond to smaller wavelengths of turbulent eddies that contain most of the energy. This work highlights the structural difference between the hurricane boundary layer and the standard atmospheric boundary layer over land and ocean. Copyright (C) 2010 Royal Meteorological Society
引用
收藏
页码:918 / 926
页数:9
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