A multi-instrument comparison of integrated water vapour measurements at a high latitude site
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, groundbased microwave radiometer, and...
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Online Access: | https://doi.org/10.5194/acp-12-10925-2012 https://research.chalmers.se/en/publication/168381 |
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ftchalmersuniv:oai:research.chalmers.se:168381 2023-05-15T17:04:14+02:00 A multi-instrument comparison of integrated water vapour measurements at a high latitude site Buehler, S.A. Östman, S. Melsheimer, C. Holl, G. Eliasson, S. John, V.O. Blumenstock, T. Hase, F. Elgered, Gunnar Raffalski, U. Nasuno, T. Satoh, M. Milz, M. Mendrok, J. 2012 text https://doi.org/10.5194/acp-12-10925-2012 https://research.chalmers.se/en/publication/168381 unknown http://dx.doi.org/10.5194/acp-12-10925-2012 https://research.chalmers.se/en/publication/168381 Meteorology and Atmospheric Sciences 2012 ftchalmersuniv https://doi.org/10.5194/acp-12-10925-2012 2022-12-11T07:07:52Z 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, groundbased 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 thedata are cloud-filtered. We also address two issues that aregeneral 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. Other/Unknown Material Kiruna Northern Sweden Subarctic Chalmers University of Technology: Chalmers research Kiruna Atmospheric Chemistry and Physics 12 22 10925 10943 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Meteorology and Atmospheric Sciences |
spellingShingle |
Meteorology and Atmospheric Sciences Buehler, S.A. Östman, S. Melsheimer, C. Holl, G. Eliasson, S. John, V.O. Blumenstock, T. Hase, F. Elgered, Gunnar Raffalski, U. Nasuno, T. Satoh, M. Milz, M. Mendrok, J. A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
topic_facet |
Meteorology and Atmospheric Sciences |
description |
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, groundbased 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 thedata are cloud-filtered. We also address two issues that aregeneral 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. |
author |
Buehler, S.A. Östman, S. Melsheimer, C. Holl, G. Eliasson, S. John, V.O. Blumenstock, T. Hase, F. Elgered, Gunnar Raffalski, U. Nasuno, T. Satoh, M. Milz, M. Mendrok, J. |
author_facet |
Buehler, S.A. Östman, S. Melsheimer, C. Holl, G. Eliasson, S. John, V.O. Blumenstock, T. Hase, F. Elgered, Gunnar Raffalski, U. Nasuno, T. Satoh, M. Milz, M. Mendrok, J. |
author_sort |
Buehler, S.A. |
title |
A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
title_short |
A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
title_full |
A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
title_fullStr |
A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
title_full_unstemmed |
A multi-instrument comparison of integrated water vapour measurements at a high latitude site |
title_sort |
multi-instrument comparison of integrated water vapour measurements at a high latitude site |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-10925-2012 https://research.chalmers.se/en/publication/168381 |
geographic |
Kiruna |
geographic_facet |
Kiruna |
genre |
Kiruna Northern Sweden Subarctic |
genre_facet |
Kiruna Northern Sweden Subarctic |
op_relation |
http://dx.doi.org/10.5194/acp-12-10925-2012 https://research.chalmers.se/en/publication/168381 |
op_doi |
https://doi.org/10.5194/acp-12-10925-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
22 |
container_start_page |
10925 |
op_container_end_page |
10943 |
_version_ |
1766058301207871488 |