Open AccessA robust method to determine global distribution of atmospheric boundary layer top from COSMIC GPS RO measurements
Author(s) -
Ratnam M. V.,
Basha S. G.
Publication year - 2010
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.277
Subject(s) - planetary boundary layer , radio occultation , covariance , cosmic cancer database , radiosonde , global positioning system , environmental science , meteorology , remote sensing , mathematics , computer science , physics , geology , statistics , astronomy , telecommunications , turbulence
In this study, we introduce a robust method for precise determination of atmospheric boundary layer (ABL) top from COSMIC global positioning system radio occultation measurements. We apply a wavelet covariance transform to compute the convolution of COSMIC‐observed bending angle/refractivity profile with a Haar function and use the maximum covariance to identify the ABL top, making detection of even small transitions possible. Results obtained were compared with radiosonde N profiles for verification of the ABL top. This procedure developed was used to study the global distribution of ABL top with special reference to the inter‐tropical convergence zone. Copyright © 2010 Royal Meteorological Society