Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site
Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under active development. This work presents a detailed intercomparison of water vapour total column measurements taken between 2006 and 2014 at a...
Published in: | Atmospheric Measurement Techniques |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus GmbH
2017
|
Subjects: | |
Online Access: | https://espace.library.uq.edu.au/view/UQ:682045 |
id |
ftunivqespace:oai:espace.library.uq.edu.au:UQ:682045 |
---|---|
record_format |
openpolar |
spelling |
ftunivqespace:oai:espace.library.uq.edu.au:UQ:682045 2023-05-15T15:00:50+02:00 Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site Weaver, Dan Strong, Kimberly Schneider, Matthias Rowe, Penny M. Sioris, Chris Walker, Kaley A. Mariani, Zen Uttal, Taneil McElroy, C. Thomas Vomel, Holger Spassiani, Alessio Drummond, James R. 2017-08-01 https://espace.library.uq.edu.au/view/UQ:682045 eng eng Copernicus GmbH doi:10.5194/amt-10-2851-2017 issn:1867-8548 issn:1867-1381 Not set 256961 1161460 PLR 1543236 1543236 Biochemistry & Molecular Biology Physiology Zoology 1902 Atmospheric Science Journal Article 2017 ftunivqespace https://doi.org/10.5194/amt-10-2851-2017 2020-12-22T13:08:13Z Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under active development. This work presents a detailed intercomparison of water vapour total column measurements taken between 2006 and 2014 at a Canadian High Arctic research site (Eureka, Nunavut). Instruments include radiosondes, sun photometers, a microwave radiometer, and emission and solar absorption Fourier transform infrared (FTIR) spectrometers. Close agreement is observed between all combination of datasets, with mean differences ≤1.0 kgm and correlation coefficients ≥0.98. The one exception in the observed high correlation is the comparison between the microwave radiometer and a radiosonde product, which had a correlation coefficient of 0.92. A variety of biases affecting Eureka instruments are revealed and discussed. A subset of Eureka radiosonde measurements was processed by the Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) for this study. Comparisons reveal a small dry bias in the standard radiosonde measurement water vapour total columns of approximately 4 %. A recently produced solar absorption FTIR spectrometer dataset resulting from the MUSICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water) retrieval technique is shown to offer accurate measurements of water vapour total columns (e.g. average agreement within-5.2% of GRUAN and-6.5% of a co-located emission FTIR spectrometer). However, comparisons show a small wet bias of approximately 6% at the high-latitude Eureka site. In addition, a new dataset derived from Atmospheric Emitted Radiance Interferometer (AERI) measurements is shown to provide accurate water vapour measurements (e.g. average agreement was within 4% of GRUAN), which usefully enables measurements to be taken during day and night (especially valuable during polar night). Article in Journal/Newspaper Arctic Eureka Nunavut polar night The University of Queensland: UQ eSpace Arctic Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Nunavut Atmospheric Measurement Techniques 10 8 2851 2880 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Biochemistry & Molecular Biology Physiology Zoology 1902 Atmospheric Science |
spellingShingle |
Biochemistry & Molecular Biology Physiology Zoology 1902 Atmospheric Science Weaver, Dan Strong, Kimberly Schneider, Matthias Rowe, Penny M. Sioris, Chris Walker, Kaley A. Mariani, Zen Uttal, Taneil McElroy, C. Thomas Vomel, Holger Spassiani, Alessio Drummond, James R. Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
topic_facet |
Biochemistry & Molecular Biology Physiology Zoology 1902 Atmospheric Science |
description |
Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under active development. This work presents a detailed intercomparison of water vapour total column measurements taken between 2006 and 2014 at a Canadian High Arctic research site (Eureka, Nunavut). Instruments include radiosondes, sun photometers, a microwave radiometer, and emission and solar absorption Fourier transform infrared (FTIR) spectrometers. Close agreement is observed between all combination of datasets, with mean differences ≤1.0 kgm and correlation coefficients ≥0.98. The one exception in the observed high correlation is the comparison between the microwave radiometer and a radiosonde product, which had a correlation coefficient of 0.92. A variety of biases affecting Eureka instruments are revealed and discussed. A subset of Eureka radiosonde measurements was processed by the Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) for this study. Comparisons reveal a small dry bias in the standard radiosonde measurement water vapour total columns of approximately 4 %. A recently produced solar absorption FTIR spectrometer dataset resulting from the MUSICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water) retrieval technique is shown to offer accurate measurements of water vapour total columns (e.g. average agreement within-5.2% of GRUAN and-6.5% of a co-located emission FTIR spectrometer). However, comparisons show a small wet bias of approximately 6% at the high-latitude Eureka site. In addition, a new dataset derived from Atmospheric Emitted Radiance Interferometer (AERI) measurements is shown to provide accurate water vapour measurements (e.g. average agreement was within 4% of GRUAN), which usefully enables measurements to be taken during day and night (especially valuable during polar night). |
format |
Article in Journal/Newspaper |
author |
Weaver, Dan Strong, Kimberly Schneider, Matthias Rowe, Penny M. Sioris, Chris Walker, Kaley A. Mariani, Zen Uttal, Taneil McElroy, C. Thomas Vomel, Holger Spassiani, Alessio Drummond, James R. |
author_facet |
Weaver, Dan Strong, Kimberly Schneider, Matthias Rowe, Penny M. Sioris, Chris Walker, Kaley A. Mariani, Zen Uttal, Taneil McElroy, C. Thomas Vomel, Holger Spassiani, Alessio Drummond, James R. |
author_sort |
Weaver, Dan |
title |
Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
title_short |
Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
title_full |
Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
title_fullStr |
Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
title_full_unstemmed |
Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site |
title_sort |
intercomparison of atmospheric water vapour measurements at a canadian high arctic site |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:682045 |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Eureka Nunavut |
geographic_facet |
Arctic Eureka Nunavut |
genre |
Arctic Eureka Nunavut polar night |
genre_facet |
Arctic Eureka Nunavut polar night |
op_relation |
doi:10.5194/amt-10-2851-2017 issn:1867-8548 issn:1867-1381 Not set 256961 1161460 PLR 1543236 1543236 |
op_doi |
https://doi.org/10.5194/amt-10-2851-2017 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
10 |
container_issue |
8 |
container_start_page |
2851 |
op_container_end_page |
2880 |
_version_ |
1766332889912311808 |