Estimating Atmospheric Boundary Layer Depth Using COSMIC Radio Occultation Data
نویسندگان
چکیده
منابع مشابه
The seasonal cycle of planetary boundary layer depth determined using COSMIC radio occultation data
[1] The seasonal cycle of planetary boundary layer (PBL) depth is examined globally using observations from the Constellation Observing System for the Meteorology, Ionosphere, and Climate (COSMIC) satellite mission. COSMIC uses GPS radio occultation to derive the vertical profile of refractivity at high vertical resolution (~100m). Here, we apply an algorithm to determine PBL top height and thu...
متن کاملMonitoring the atmospheric boundary layer by GPS radio occultation signals recorded in the open-loop mode
[1] A new type of radio occultation (RO) data, recorded in open-loop (OL) mode from the SAC-C satellite, has been tested for monitoring refractivity in the Atmospheric Boundary Layer (ABL). Previously available RO signals, recorded in phase-locked loop mode were often unusable for sensing the lower troposphere (LT) or resulted in significant inversion errors, especially in the tropics. The OL R...
متن کاملPotential Impact of COSMIC GPS Radio Occultation Data on Regional
A major challenge for operational numerical weather prediction over the Antarctic and Southern Ocean is the lack of traditional meteorological observations. This increases uncertainty in the model initial condition and results in inferior forecast skills as compared with numerical weather prediction in mid-latitudes over the Northern Hemisphere. With the lack of traditional observations over th...
متن کاملAnalysis of vertical wave number spectrum of atmospheric gravity waves in the stratosphere using COSMIC GPS radio occultation data
GPS radio occultation (RO) is characterized by high accuracy and excellent height resolution, which has great advantages in analyzing atmospheric structures including small-scale vertical fluctuations. The vertical resolution of the geometrical optics (GO) method in the stratosphere is about 1.5 km due to Fresnel radius limitations, but full spectrum inversion (FSI) can provide superior resolut...
متن کاملEstimation of tropospheric profiles using COSMIC GPS radio occultation data with neural networks
In this work we have proposed a method based on neural networks to directly retrieve dry and wet refractivity and dry pressure profiles in troposphere (which in turn can be used to obtain temperature and humidity profiles) by using COSMIC GPS radio occultation (RO) data. To overcome the constraint of an independent knowledge of one atmospheric parameter at each GPS occultation, we trained diffe...
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ژورنال
عنوان ژورنال: Journal of the Atmospheric Sciences
سال: 2011
ISSN: 0022-4928,1520-0469
DOI: 10.1175/2011jas3612.1