A global assessment of NASA airs v6 and EUMETSAT IASI v6 precipitable water vapor using ground-based GPS suominet stations

Jacola Ann Roman, Robert Knuteson, Thomas August, Tim Hultberg, Steve Ackerman, Hank Revercomb

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Satellite remote sensing of precipitable water vapor (PWV) is essential for monitoring moisture in real time for weather applications, as well as tracking the long-term changes in PWV for climate change trend detection. This study assesses the accuracies of the current satellite observing system, specifically the National Aeronautics and Space Administration (NASA) Atmospheric Infrared Sounder (AIRS) v6 PWV product and the European Organization for the Exploitation of Meteorological Satellite Studies (EUMETSAT) Infrared Atmospheric Sounding Interferometer (IASI) v6 PWV product, using ground-based SuomiNet Global Positioning System (GPS) network as truth. Elevation-corrected collocated matchups to each SuomiNet GPS station in North America and around the world were created, and results were broken down by station, ARM region, climate zone, and latitude zone. The greatest difference, exceeding 5%, between IASI and AIRS retrievals occurred in the tropics. Generally, IASI and AIRS fall within a 5% error in the PWV range of 20-40mm (a mean bias less than 2 mm), with a wet bias for extremely low PWV values (less than 5 mm) and a dry bias for extremely high PWV values (greater than 50 mm). The operational IR satellite products are able to capture the mean PWV but degrade in the extreme dry and wet regimes.

Original languageEnglish (US)
Pages (from-to)8925-8948
Number of pages24
JournalJournal of Geophysical Research
Volume121
Issue number15
DOIs
StatePublished - Jan 1 2016

Fingerprint

IASI
atmospheric sounding
precipitable water
global positioning systems
Global Positioning System
Steam
aeronautics
water vapor
Interferometers
Water vapor
NASA
Global positioning system
GPS
interferometers
stations
Infrared radiation
air
Air
AIRS
Acoustic waves

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

Roman, Jacola Ann ; Knuteson, Robert ; August, Thomas ; Hultberg, Tim ; Ackerman, Steve ; Revercomb, Hank. / A global assessment of NASA airs v6 and EUMETSAT IASI v6 precipitable water vapor using ground-based GPS suominet stations. In: Journal of Geophysical Research. 2016 ; Vol. 121, No. 15. pp. 8925-8948.
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A global assessment of NASA airs v6 and EUMETSAT IASI v6 precipitable water vapor using ground-based GPS suominet stations. / Roman, Jacola Ann; Knuteson, Robert; August, Thomas; Hultberg, Tim; Ackerman, Steve; Revercomb, Hank.

In: Journal of Geophysical Research, Vol. 121, No. 15, 01.01.2016, p. 8925-8948.

Research output: Contribution to journalArticle

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