COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate) global ocean RO data from 2007 to 2014 were used, and the extreme values of bending angle and refractivity gradient were used to determine the global marine PBL heights (respectively referred to as PBLBA and PBLN), and the relationship between the LSW at the PBL height, the vertical gradient of the refractivity, and the PBL difference between the bending angle and the refractivity (referred as PBLdiff, PBLdiff=PBLBA-PBLN)were discussed.The results show that there is a clear linear relationship between the vertical gradient of refractivity and LSW.At the first and second PBL height, the correlation coefficients can reach 0.60 and 0.68.The refractivity is mainly composed of dry and wet terms.In low latitudes, the wet term is the main contribution of the refractivity.The correlation coefficient between the vertical gradient of the wet term and the LSW in the first and second PBL height can reach 0.68 and 0.69.The first boundary layer PBLdiff increases with the vertical refractivity gradient.When the absolute value of the refractivity gradient reaches 80 N-unit·km-1 and 100 N-unit·km-1, PBLdiff can reach 100 meters and 160 meters.
Tian MENG
,
Shengpeng YANG
,
Hua CHENG
. Observation Error of GPS Radio Occultation and Discrimination of Planetary Boundary Layer Height[J]. Plateau Meteorology, 2021
, 40(5)
: 1189
-1201
.
DOI: 10.7522/j.issn.1000-0534.2020.00098
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