Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C
Middle atmospheric water vapour can be used as a tracer for dynamical processes. It is mainly measured by satellite instruments and ground-based microwave radiometers. Ground-based instruments capable of measuring middle-atmospheric water vapour are sparse but valuable as they complement satellite m...
Published in: | Atmospheric Measurement Techniques |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2013
|
Subjects: | |
Online Access: | https://doi.org/10.5194/amt-6-1725-2013 https://doaj.org/article/9caf6cbafcef46a7be99d16281aa7f4b |
id |
ftdoajarticles:oai:doaj.org/article:9caf6cbafcef46a7be99d16281aa7f4b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:9caf6cbafcef46a7be99d16281aa7f4b 2023-05-15T15:02:08+02:00 Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C B. Tschanz C. Straub D. Scheiben K. A. Walker G. P. Stiller N. Kämpfer 2013-07-01T00:00:00Z https://doi.org/10.5194/amt-6-1725-2013 https://doaj.org/article/9caf6cbafcef46a7be99d16281aa7f4b EN eng Copernicus Publications http://www.atmos-meas-tech.net/6/1725/2013/amt-6-1725-2013.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-6-1725-2013 1867-1381 1867-8548 https://doaj.org/article/9caf6cbafcef46a7be99d16281aa7f4b Atmospheric Measurement Techniques, Vol 6, Iss 7, Pp 1725-1745 (2013) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2013 ftdoajarticles https://doi.org/10.5194/amt-6-1725-2013 2022-12-31T14:59:17Z Middle atmospheric water vapour can be used as a tracer for dynamical processes. It is mainly measured by satellite instruments and ground-based microwave radiometers. Ground-based instruments capable of measuring middle-atmospheric water vapour are sparse but valuable as they complement satellite measurements, are relatively easy to maintain and have a long lifetime. MIAWARA-C is a ground-based microwave radiometer for middle-atmospheric water vapour designed for use on measurement campaigns for both atmospheric case studies and instrument intercomparisons. MIAWARA-C's retrieval version 1.1 (v1.1) is set up in a such way as to provide a consistent data set even if the instrument is operated from different locations on a campaign basis. The sensitive altitude range for v1.1 extends from 4 hPa (37 km) to 0.017 hPa (75 km). For v1.1 the estimated systematic error is approximately 10% for all altitudes. At lower altitudes it is dominated by uncertainties in the calibration, with altitude the influence of spectroscopic and temperature uncertainties increases. The estimated random error increases with altitude from 5 to 25%. MIAWARA-C measures two polarisations of the incident radiation in separate receiver channels, and can therefore provide two measurements of the same air mass with independent instrumental noise. The standard deviation of the difference between the profiles obtained from the two polarisations is in excellent agreement with the estimated random measurement error of v1.1. In this paper, the quality of v1.1 data is assessed for measurements obtained at two different locations: (1) a total of 25 months of measurements in the Arctic (Sodankylä, 67.37° N, 26.63° E) and (2) nine months of measurements at mid-latitudes (Zimmerwald, 46.88° N, 7.46° E). For both locations MIAWARA-C's profiles are compared to measurements from the satellite experiments Aura MLS and MIPAS. In addition, comparisons to ACE-FTS and SOFIE are presented for the Arctic and to the ground-based radiometer MIAWARA for the mid-latitude ... Article in Journal/Newspaper Arctic Sodankylä Directory of Open Access Journals: DOAJ Articles Arctic Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Atmospheric Measurement Techniques 6 7 1725 1745 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
spellingShingle |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 B. Tschanz C. Straub D. Scheiben K. A. Walker G. P. Stiller N. Kämpfer Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
Middle atmospheric water vapour can be used as a tracer for dynamical processes. It is mainly measured by satellite instruments and ground-based microwave radiometers. Ground-based instruments capable of measuring middle-atmospheric water vapour are sparse but valuable as they complement satellite measurements, are relatively easy to maintain and have a long lifetime. MIAWARA-C is a ground-based microwave radiometer for middle-atmospheric water vapour designed for use on measurement campaigns for both atmospheric case studies and instrument intercomparisons. MIAWARA-C's retrieval version 1.1 (v1.1) is set up in a such way as to provide a consistent data set even if the instrument is operated from different locations on a campaign basis. The sensitive altitude range for v1.1 extends from 4 hPa (37 km) to 0.017 hPa (75 km). For v1.1 the estimated systematic error is approximately 10% for all altitudes. At lower altitudes it is dominated by uncertainties in the calibration, with altitude the influence of spectroscopic and temperature uncertainties increases. The estimated random error increases with altitude from 5 to 25%. MIAWARA-C measures two polarisations of the incident radiation in separate receiver channels, and can therefore provide two measurements of the same air mass with independent instrumental noise. The standard deviation of the difference between the profiles obtained from the two polarisations is in excellent agreement with the estimated random measurement error of v1.1. In this paper, the quality of v1.1 data is assessed for measurements obtained at two different locations: (1) a total of 25 months of measurements in the Arctic (Sodankylä, 67.37° N, 26.63° E) and (2) nine months of measurements at mid-latitudes (Zimmerwald, 46.88° N, 7.46° E). For both locations MIAWARA-C's profiles are compared to measurements from the satellite experiments Aura MLS and MIPAS. In addition, comparisons to ACE-FTS and SOFIE are presented for the Arctic and to the ground-based radiometer MIAWARA for the mid-latitude ... |
format |
Article in Journal/Newspaper |
author |
B. Tschanz C. Straub D. Scheiben K. A. Walker G. P. Stiller N. Kämpfer |
author_facet |
B. Tschanz C. Straub D. Scheiben K. A. Walker G. P. Stiller N. Kämpfer |
author_sort |
B. Tschanz |
title |
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
title_short |
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
title_full |
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
title_fullStr |
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
title_full_unstemmed |
Validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer MIAWARA-C |
title_sort |
validation of middle-atmospheric campaign-based water vapour measured by the ground-based microwave radiometer miawara-c |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/amt-6-1725-2013 https://doaj.org/article/9caf6cbafcef46a7be99d16281aa7f4b |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Arctic Sodankylä |
geographic_facet |
Arctic Sodankylä |
genre |
Arctic Sodankylä |
genre_facet |
Arctic Sodankylä |
op_source |
Atmospheric Measurement Techniques, Vol 6, Iss 7, Pp 1725-1745 (2013) |
op_relation |
http://www.atmos-meas-tech.net/6/1725/2013/amt-6-1725-2013.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 doi:10.5194/amt-6-1725-2013 1867-1381 1867-8548 https://doaj.org/article/9caf6cbafcef46a7be99d16281aa7f4b |
op_doi |
https://doi.org/10.5194/amt-6-1725-2013 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
6 |
container_issue |
7 |
container_start_page |
1725 |
op_container_end_page |
1745 |
_version_ |
1766334125559513088 |