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The SPARC water vap...
The SPARC water vapor assessment II: intercomparison of satellite and ground-based microwave measurements
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- Nedoluha, G.E. (author)
- Naval Research Laboratory
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- Kiefer, M. (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Lossow, Stefan, 1977 (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Gomez, R. Michael (author)
- Naval Research Laboratory
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- Kämpfer, N. (author)
- Universität Bern,University of Bern
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- Lainer, Martin (author)
- Universität Bern,University of Bern
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- Forkman, Peter, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Christensen, Ole Martin, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Oh, Jung Jin (author)
- Sookmyung Women's University
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- Hartogh, P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Anderson, John (author)
- Hampton University
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- Bramstedt, K. (author)
- Universität Bremen
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- Dinelli, B. M. (author)
- Institute of Atmospheric Sciences and Climate, Bologna
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- Garcia-Comas, M. (author)
- Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
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Hervig, M.E. (author)
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- Murtagh, Donal, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Raspollini, P. (author)
- Istituto Di Fisica Applicata Nello Carrara
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Read, W.G. (author)
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- Rosenlof, K. H. (author)
- University of Colorado at Boulder
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- Stiller, G.P. (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Walker, K. A. (author)
- University of Toronto
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(creator_code:org_t)
- 2017-12-06
- 2017
- English.
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In: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 17:23, s. 14543-14558
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Abstract
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- As part of the second SPARC (Stratosphere-troposphere Processes And their Role in Climate) water vapor assessment (WAVAS-II), we present measurements taken from or coincident with seven sites from which ground-based microwave instruments measure water vapor in the middle atmosphere. Six of the ground-based instruments are part of the Network for the Detection of Atmospheric Composition Change (NDACC) and provide datasets that can be used for drift and trend assessment. We compare measurements from these ground-based instruments with satellite datasets that have provided retrievals of water vapor in the lower mesosphere over extended periods since 1996. We first compare biases between the satellite and ground-based instruments from the upper stratosphere to the upper mesosphere. We then show a number of time series comparisons at 0.46 hPa, a level that is sensitive to changes in H2O and CH4 entering the stratosphere but, because almost all CH4 has been oxidized, is relatively insensitive to dynamical variations. Interannual variations and drifts are investigated with respect to both the Aura Microwave Limb Sounder (MLS; from 2004 onwards) and each instrument's climatological mean. We find that the variation in the interannual difference in the mean H2O measured by any two instruments is typically similar to 1%. Most of the datasets start in or after 2004 and show annual increases in H2O of 0-1% yr(-1). In particular, MLS shows a trend of between 0.5% yr(-1) and 0.7% yr(-1) at the comparison sites. However, the two longest measurement datasets used here, with measurements back to 1996, show much smaller trends of +0.1% yr(-1) (at Mauna Loa, Hawaii) and -0.1% yr(-1) (at Lauder, New Zealand).
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Keyword
- transport
- middle atmosphere
- stratosphere
- instruments
- millimeter-wave spectrometer
- validation
- retrieval
- temperature
- campaign
- radiometer
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Nedoluha, G.E.
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Kiefer, M.
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Lossow, Stefan, ...
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Gomez, R. Michae ...
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Kämpfer, N.
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Lainer, Martin
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show more...
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Forkman, Peter, ...
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Christensen, Ole ...
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Oh, Jung Jin
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Hartogh, P.
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Anderson, John
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Bramstedt, K.
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Dinelli, B. M.
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Garcia-Comas, M.
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Hervig, M.E.
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Murtagh, Donal, ...
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Raspollini, P.
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Read, W.G.
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Rosenlof, K. H.
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Stiller, G.P.
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Walker, K. A.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
- Articles in the publication
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Atmospheric Chem ...
- By the university
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Chalmers University of Technology