Validation of FORMOSAT-3/COSMIC level 2 &quot;atmPrf&quot; global temperature data in the stratosphere

NCUIR > College of Earth Sciences > DEPARTMENT OF SPACE SCIENCE AND ENGINEERING > journal & Dissertation > Item 987654321/102366

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/102366

Title:	Validation of FORMOSAT-3/COSMIC level 2 ";atmPrf";global temperature data in the stratosphere
Authors:	潘貞杰;Das, U.;Pan, C. J.
Contributors:	地球科學學院太空科學與工程學系
Keywords:	Atmosphere;Global Positioning System;Global positioning systems;Global temperatures;GPS;Ionosphere;Middle atmosphere;Relative humidity;Stratosphere;Upper atmosphere;Water vapor
Date:	2014-03-12
Issue Date:	2026-04-23 11:07:08 (UTC+8)
Publisher:	Copernicus Gesellschaft mbH;Katlenburg-Lindau: Copernicus Publications
Abstract:	摘要： GPS radio occultations by Formosa Satellite mission-3/Constellation Observing System for Meteorology, Ionosphere, and Climate (FORMOSAT-3/COSMIC) provide bending angle profiles, which are further processed to give profiles of temperature and water vapour in the lower atmosphere and electron density in the upper atmosphere. The level 2 "atmPrf" (atmospheric profile) product of version 2010.2640 gives temperature from surface to 0.2 hPa (~ 60 km). This is a dry temperature data product that does not include relative humidity in the inversion process and hence is reliable at altitudes < 100 hPa and erroneous at lower altitudes. In the current study we compare the COSMIC "atmPrf" data from December 2010 to November 2011 with other satellite (SABER/TIMED and MLS/Aura) temperatures from 50 to 0.2 hPa, COSMIC "wetPrf" data and reanalysis (NCEP, ERA-Interim and UKMO) outputs at 100, 10, 1 and 0.5 hPa pressure levels. The satellite comparisons show that below 1 hPa the observed median differences are most likely produced due to the biases in the retrievals of SABER and MLS. "atmPrf" and "wetPrf" temperatures compare extremely well in the common altitudes with differences being absolute zero between 200 and 10 hPa. When compared to reanalysis outputs, COSMIC seasonal means match NCEP and ECMWF seasonal mean temperatures very well, especially at 100 and 10 hPa. We conclude from this study that with the COSMIC dry temperature retrievals obtained from radio occultations of GPS, there is a 20 km extension of reliable data in the middle atmosphere. "atmPrf" data are of good quality and provide reliable and unprecedentedly large number of profiles at greater temporal and spatial resolutions for further studies and investigations of the middle atmosphere up to 1 hPa, i.e., approximately up to the stratopause at around 50 km. 出版者： Katlenburg-Lindau: Copernicus Publications 出版日期： 2014-03-12 出處： Atmospheric Measurement Techniques, 2014-03, Vol.7 (3), p.731-742 資源來源： Publicly Available Content Database 版權： COPYRIGHT 2014 Copernicus GmbH 版權： Copyright Copernicus GmbH 2014 識別號： ISSN: 1867-8548 識別號： ISSN: 1867-1381 識別號： EISSN: 1867-8548 識別號： DOI: 10.5194/amt-7-731-2014
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	34	View/Open

社群 sharing

Loading...