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AGU: Journal of Geophysical Research, Atmospheres

 

Index Terms

  • Radio Science: Remote sensing
  • Atmospheric Composition and Structure: Troposphere: composition and chemistry
  • Hydrology: Climate impacts
  • Global Change: Climate variability
  • Global Change: Remote sensing
Abstract
Cited By (14)
 

Abstract

Aura Microwave Limb Sounder upper tropospheric and lower stratospheric H2O and relative humidity with respect to ice validation

W. G. Read

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

A. Lambert

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

J. Bacmeister

Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

R. E. Cofield

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

L. E. Christensen

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

D. T. Cuddy

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

W. H. Daffer

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

B. J. Drouin

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

E. Fetzer

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

L. Froidevaux

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

R. Fuller

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

R. Herman

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

R. F. Jarnot

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

J. H. Jiang

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Y. B. Jiang

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

K. Kelly

NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, Colorado, USA

B. W. Knosp

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

L. J. Kovalenko

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

N. J. Livesey

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

H.-C. Liu

Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

G. L. Manney

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

H. M. Pickett

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

H. C. Pumphrey

Department of Meteorology, University of Edinburgh, Edinburgh, UK

K. H. Rosenlof

NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, Colorado, USA

X. Sabounchi

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

M. L. Santee

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

M. J. Schwartz

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

W. V. Snyder

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

P. C. Stek

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

H. Su

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

L. L. Takacs

Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

R. P. Thurstans

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

H. Vömel

Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA

P. A. Wagner

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

J. W. Waters

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

C. R. Webster

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

E. M. Weinstock

Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts, USA

D. L. Wu

Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

The validation of version 2.2 (v2.2) H2O measurements from the Earth Observing System (EOS) Microwave Limb Sounder (Aura MLS) on the Aura satellite are presented. Results from comparisons made with Aqua Atmospheric Infrared Sounder (AIRS), Vaisala radiosondes, frost point hygrometer, and WB57 aircraft hygrometers are presented. Comparisons with the Aura MLS v1.5 H2O, Goddard global modeling and assimilation office Earth Observing System analyses (GEOS-5) are also discussed. For H2O mixing ratios less than 500 ppmv, the MLS v2.2 has an accuracy better than 25% between 316 and 147 hPa. The precision is 65% at 316 hPa that reduces to 25% at 147 hPa. This performance is better than expected from MLS measurement systematic error analyses. MLS overestimates H2O for mixing ratios greater than 500 ppmv which is consistent with a scaling error in either the calibrated or calculated MLS radiances. The validation of the accuracy of MLS v2.2 H2O from 121 to 83 hPa which is expected to be better than 15% cannot be confirmed at this time because of large disagreements among the hygrometers used in the AVE campaigns. The precision of the v2.2 H2O from 121 to 83 hPa is 10–20%. The vertical resolution is 1.5–3.5 km depending on height. The horizontal resolution is 210 × 7 km2 along and perpendicular to the Aura orbit track, respectively. Relative humidity is calculated from H2O and temperature. The precision, accuracy, and spatial resolution are worse than for H2O.

Received 4 April 2007; accepted 23 October 2007; published 28 December 2007.

Citation: Read, W. G., et al. (2007), Aura Microwave Limb Sounder upper tropospheric and lower stratospheric H2O and relative humidity with respect to ice validation, J. Geophys. Res., 112, D24S35, doi:10.1029/2007JD008752.

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