MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations
We developed an algorithm for the retrieval of the atmospheric water vapour column from Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations in the yellow and red spectral range. The retrieval is based on the so-called geometric approximation and does not depend on explici...
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ftdoajarticles:oai:doaj.org/article:e54382edb650412a844a1307d12ecfeb 2023-05-15T13:06:27+02:00 MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations T. Wagner M. O. Andreae S. Beirle S. Dörner K. Mies R. Shaiganfar 2013-01-01T00:00:00Z https://doi.org/10.5194/amt-6-131-2013 https://doaj.org/article/e54382edb650412a844a1307d12ecfeb EN eng Copernicus Publications http://www.atmos-meas-tech.net/6/131/2013/amt-6-131-2013.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-6-131-2013 1867-1381 1867-8548 https://doaj.org/article/e54382edb650412a844a1307d12ecfeb Atmospheric Measurement Techniques, Vol 6, Iss 1, Pp 131-149 (2013) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2013 ftdoajarticles https://doi.org/10.5194/amt-6-131-2013 2022-12-31T10:11:56Z We developed an algorithm for the retrieval of the atmospheric water vapour column from Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations in the yellow and red spectral range. The retrieval is based on the so-called geometric approximation and does not depend on explicit a priori information for individual observations, extensive radiative transfer simulations, or the construction of large look-up tables. Disturbances of the radiative transfer due to aerosols and clouds are simply corrected using the simultaneously measured absorptions of the oxygen dimer, O 4 . We applied our algorithm to MAX-DOAS observations made at the Max Planck Institute for Chemistry in Mainz, Germany, from March to August 2011, and compared the results to independent observations. Good agreement with Aerosol Robotic Network (AERONET) and European Centre for Medium-Range Weather Forecasting (ECMWF) H 2 O vertical column densities (VCDs) is found, while the agreement with satellite observations is less good, most probably caused by the shielding effect of clouds for the satellite observations. Good agreement is also found with near-surface in situ observations, and it was possible to derive average daily H 2 O scale heights (between 1.5 km and 3 km). MAX-DOAS measurements use cheap and simple instrumentation and can be run automatically. One important advantage of our algorithm is that the H 2 O VCD can be retrieved even under cloudy conditions (except clouds with very high optical thickness). Article in Journal/Newspaper Aerosol Robotic Network Directory of Open Access Journals: DOAJ Articles Atmospheric Measurement Techniques 6 1 131 149 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
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Environmental engineering TA170-171 Earthwork. Foundations TA715-787 T. Wagner M. O. Andreae S. Beirle S. Dörner K. Mies R. Shaiganfar MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
We developed an algorithm for the retrieval of the atmospheric water vapour column from Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations in the yellow and red spectral range. The retrieval is based on the so-called geometric approximation and does not depend on explicit a priori information for individual observations, extensive radiative transfer simulations, or the construction of large look-up tables. Disturbances of the radiative transfer due to aerosols and clouds are simply corrected using the simultaneously measured absorptions of the oxygen dimer, O 4 . We applied our algorithm to MAX-DOAS observations made at the Max Planck Institute for Chemistry in Mainz, Germany, from March to August 2011, and compared the results to independent observations. Good agreement with Aerosol Robotic Network (AERONET) and European Centre for Medium-Range Weather Forecasting (ECMWF) H 2 O vertical column densities (VCDs) is found, while the agreement with satellite observations is less good, most probably caused by the shielding effect of clouds for the satellite observations. Good agreement is also found with near-surface in situ observations, and it was possible to derive average daily H 2 O scale heights (between 1.5 km and 3 km). MAX-DOAS measurements use cheap and simple instrumentation and can be run automatically. One important advantage of our algorithm is that the H 2 O VCD can be retrieved even under cloudy conditions (except clouds with very high optical thickness). |
format |
Article in Journal/Newspaper |
author |
T. Wagner M. O. Andreae S. Beirle S. Dörner K. Mies R. Shaiganfar |
author_facet |
T. Wagner M. O. Andreae S. Beirle S. Dörner K. Mies R. Shaiganfar |
author_sort |
T. Wagner |
title |
MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
title_short |
MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
title_full |
MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
title_fullStr |
MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
title_full_unstemmed |
MAX-DOAS observations of the total atmospheric water vapour column and comparison with independent observations |
title_sort |
max-doas observations of the total atmospheric water vapour column and comparison with independent observations |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/amt-6-131-2013 https://doaj.org/article/e54382edb650412a844a1307d12ecfeb |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Atmospheric Measurement Techniques, Vol 6, Iss 1, Pp 131-149 (2013) |
op_relation |
http://www.atmos-meas-tech.net/6/131/2013/amt-6-131-2013.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-6-131-2013 1867-1381 1867-8548 https://doaj.org/article/e54382edb650412a844a1307d12ecfeb |
op_doi |
https://doi.org/10.5194/amt-6-131-2013 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
6 |
container_issue |
1 |
container_start_page |
131 |
op_container_end_page |
149 |
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1766006521962954752 |