COSMIC-2 RO Profile Ending at PBL Top with Strong Vertical Gradient of Refractivity

COSMIC-2 RO Profile Ending at PBL Top with Strong Vertical Gradient of Refractivity

The Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (Satellite-7/COSMIC-2), which was successfully launched on 25 June 2019, provides dense radio occultation (RO) observations over the tropics and subtropics. This study examines the RO-observed lowest al...

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Veröffentlicht in:Remote sensing (Basel, Switzerland) Switzerland), 2022-05, Vol.14 (9), p.2189
Hauptverfasser: Xu, Xu, Zou, Xiaolei
Format: Artikel
Sprache:eng
Schlagworte:
Altitude
Boundary layers
Humidity
Investigations
Ionosphere
Meteorology
penetration
Perigees
Planetary boundary layer
Radio occultation
Receivers & amplifiers
Refractivity
Satellite constellations
Satellite observation
Satellites
Tropical environments
vertical gradient of refractivity
Weather forecasting
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Zusammenfassung:The Formosa Satellite-7/Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (Satellite-7/COSMIC-2), which was successfully launched on 25 June 2019, provides dense radio occultation (RO) observations over the tropics and subtropics. This study examines the RO-observed lowest altitude and its possible relationship to refractivity gradients and planetary boundary layer (PBL) heights. COSMIC-2 RO data over the Southeast Pacific region (SEP) and the South-Central Pacific (SCP) from August 2020 are employed to determine their RO-observed lowest altitudes, and the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA5 reanalysis data are used to obtain the gradients of refractivity. Results show that there are no ray perigees below the PBL top when the vertical gradient of N−N(r) is strong (
ISSN:2072-4292
2072-4292
DOI:10.3390/rs14092189