A multi-instrument comparison of integrated water vapour measurements at a high latitude site

Buehler, Stefan (author): Luleå tekniska universitet,Rymdteknik,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

Östman, S. (author): Luleå tekniska universitet,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

Melsheimer, C. (author): Institute of Environmental Physics, University of Bremen, Germany,Universität Bremen

Holl, Gerrit (author): Luleå tekniska universitet,Rymdteknik,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

Eliasson, Salomon (author): Luleå tekniska universitet,Rymdteknik,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

Blumenstock, T. (author): Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany,Karlsruher Institut für Technologie (KIT)

Hase, F. (author): Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany,Karlsruher Institut für Technologie (KIT)

Elgered, Gunnar, 1955 (author): Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, Onsala, Sweden,Chalmers tekniska högskola,Chalmers University of Technology

Raffalski, U. (author): The Swedish Institute of Space Physics, Kiruna, Sweden,Institutet for rymdfysik (IRF),The Swedish Institute of Space Physics (IRF)

Nasuno, T. (author): Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan,Japan Agency for Marine-Earth Science and Technology

Satho, M. (author): University of Tokyo, Japan,Atmosphere and Ocean Research Institute, University of Tokyo, Tokyo, Japan

Milz, Mathias (author): Luleå tekniska universitet,Rymdteknik,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

Mendrok, Jana (author): Luleå tekniska universitet,Rymdteknik,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)

(creator_code:org_t)

2012-11-20
2012
English.
In: Atmospheric Chemistry And Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 12:22, s. 10925-10943

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Abstract Subject headings

We compare measurements of integrated water vapour (IWV) over a subarctic site (Kiruna, Northern Sweden) from five different sensors and retrieval methods: Radiosondes, Global Positioning System (GPS), ground-based Fourier-transform infrared (FTIR) spectrometer, ground-based microwave radiometer, and satellite-based microwave radiometer (AMSU-B). Additionally, we compare also to ERA-Interim model reanalysis data. GPS-based IWV data have the highest temporal coverage and resolution and are chosen as reference data set. All datasets agree reasonably well, but the ground-based microwave instrument only if the data are cloud-filtered. We also address two issues that are general for such intercomparison studies, the impact of different lower altitude limits for the IWV integration, and the impact of representativeness error. We develop methods for correcting for the former, and estimating the random error contribution of the latter. A literature survey reveals that reported systematic differences between different techniques are study-dependent and show no overall consistent pattern. Further improving the absolute accuracy of IWV measurements and providing climate-quality time series therefore remain challenging problems.

By the author/editor: Buehler, Stefan; Östman, S.; Melsheimer, C.; Holl, Gerrit; Eliasson, Salomo ...; John, V.O.; show more...; Blumenstock, T.; Hase, F.; Elgered, Gunnar, ...; Raffalski, U.; Nasuno, T.; Satho, M.; Milz, Mathias; Mendrok, Jana; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

By the university: Luleå University of Technology; Chalmers University of Technology

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