Ground-Based Water Vapor Retrieval in Antarctica: An Assessment
The atmospheric water vapor is an important indicator of the Earth’s climate state and evolution. We therefore aimed at calculating the content and long-term variation of the precipitable water vapor at five coastal Antarctic stations, i.e., Casey, Davis, Mawson, McMurdo, and Mario Zucchelli. To do...
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ftinstnastrofisi:oai:openaccess.inaf.it:20.500.12386/24983 2023-05-15T13:37:51+02:00 Ground-Based Water Vapor Retrieval in Antarctica: An Assessment NEGUSINI, MONIA Petkov, Boyan H. SARTI, PIERGUIDO Tomasi, Claudio ITA 2016 https://hdl.handle.net/20.500.12386/24983 https://doi.org/10.1109/TGRS.2015.2509059 https://ieeexplore.ieee.org/document/7378970 en eng IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 0196-2892 http://hdl.handle.net/20.500.12386/24983 doi:10.1109/TGRS.2015.2509059 2-s2.0-84954195623 000374968500036 https://ieeexplore.ieee.org/document/7378970 2016ITGRS.54.2935N open Article 2016 ftinstnastrofisi https://doi.org/20.500.12386/24983 https://doi.org/10.1109/TGRS.2015.2509059 2022-07-06T15:58:39Z The atmospheric water vapor is an important indicator of the Earth’s climate state and evolution. We therefore aimed at calculating the content and long-term variation of the precipitable water vapor at five coastal Antarctic stations, i.e., Casey, Davis, Mawson, McMurdo, and Mario Zucchelli. To do that, we processed the 12-year time series of GPS and radiosounding (RS) observations acquired at those stations, with the purpose of ensuring the utmost accuracy of the results adopting homogeneous, consistent, and up-to-date processing strategies for both data sets. Using the two fully independent techniques, rather consistent contents and seasonal variations of precipitable water were detected, mainly ranging from 1 (Austral winter) to 10 mm (Austral summer). At each site, correlation coefficients varying from 0.86 to 0.91 were found between the GPS and RS time series, with mean discrepancies ≤0.75 mm. There is no clear indication regarding the possible dry or wet biases of one technique with respect to the other, with only a notable GPS wet bias identified at Mawson and a dry bias at Casey that, nevertheless, correspond to an average difference of < 1 mm on the two series; the biases at the other sites are much smaller. Although extremely small, i.e., ranging from−0.03 to 0.04 mm/year, the linear trends of the series are not always consistent in sign. In accordance with the major climate models, the RS linear trends are mostly positive, whereas depending on the site, GPS exhibits a (very small) decrease or increase in water vapor. Article in Journal/Newspaper Antarc* Antarctic Antarctica OA@INAF (Istituto Nazionale di Astrofisica) Antarctic Austral Mario Zucchelli ENVELOPE(164.123,164.123,-74.695,-74.695) |
institution |
Open Polar |
collection |
OA@INAF (Istituto Nazionale di Astrofisica) |
op_collection_id |
ftinstnastrofisi |
language |
English |
description |
The atmospheric water vapor is an important indicator of the Earth’s climate state and evolution. We therefore aimed at calculating the content and long-term variation of the precipitable water vapor at five coastal Antarctic stations, i.e., Casey, Davis, Mawson, McMurdo, and Mario Zucchelli. To do that, we processed the 12-year time series of GPS and radiosounding (RS) observations acquired at those stations, with the purpose of ensuring the utmost accuracy of the results adopting homogeneous, consistent, and up-to-date processing strategies for both data sets. Using the two fully independent techniques, rather consistent contents and seasonal variations of precipitable water were detected, mainly ranging from 1 (Austral winter) to 10 mm (Austral summer). At each site, correlation coefficients varying from 0.86 to 0.91 were found between the GPS and RS time series, with mean discrepancies ≤0.75 mm. There is no clear indication regarding the possible dry or wet biases of one technique with respect to the other, with only a notable GPS wet bias identified at Mawson and a dry bias at Casey that, nevertheless, correspond to an average difference of < 1 mm on the two series; the biases at the other sites are much smaller. Although extremely small, i.e., ranging from−0.03 to 0.04 mm/year, the linear trends of the series are not always consistent in sign. In accordance with the major climate models, the RS linear trends are mostly positive, whereas depending on the site, GPS exhibits a (very small) decrease or increase in water vapor. |
author2 |
ITA |
format |
Article in Journal/Newspaper |
author |
NEGUSINI, MONIA Petkov, Boyan H. SARTI, PIERGUIDO Tomasi, Claudio |
spellingShingle |
NEGUSINI, MONIA Petkov, Boyan H. SARTI, PIERGUIDO Tomasi, Claudio Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
author_facet |
NEGUSINI, MONIA Petkov, Boyan H. SARTI, PIERGUIDO Tomasi, Claudio |
author_sort |
NEGUSINI, MONIA |
title |
Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
title_short |
Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
title_full |
Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
title_fullStr |
Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
title_full_unstemmed |
Ground-Based Water Vapor Retrieval in Antarctica: An Assessment |
title_sort |
ground-based water vapor retrieval in antarctica: an assessment |
publishDate |
2016 |
url |
https://hdl.handle.net/20.500.12386/24983 https://doi.org/10.1109/TGRS.2015.2509059 https://ieeexplore.ieee.org/document/7378970 |
long_lat |
ENVELOPE(164.123,164.123,-74.695,-74.695) |
geographic |
Antarctic Austral Mario Zucchelli |
geographic_facet |
Antarctic Austral Mario Zucchelli |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 0196-2892 http://hdl.handle.net/20.500.12386/24983 doi:10.1109/TGRS.2015.2509059 2-s2.0-84954195623 000374968500036 https://ieeexplore.ieee.org/document/7378970 2016ITGRS.54.2935N |
op_rights |
open |
op_doi |
https://doi.org/20.500.12386/24983 https://doi.org/10.1109/TGRS.2015.2509059 |
_version_ |
1766098365182902272 |