Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels
Data assimilation of satellite microwave measurements is one of the important keys to improving weather forecasting over the Arctic region. However, the use of surface-sensitive microwave-sounding channel measurements for data assimilation or retrieval has been limited, especially during winter, due...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Online Access: | http://www.osti.gov/servlets/purl/1975666 https://www.osti.gov/biblio/1975666 https://doi.org/10.1002/qj.4492 |
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ftosti:oai:osti.gov:1975666 2023-07-30T04:01:18+02:00 Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels Kang, Eui‐Jong Sohn, Byung‐Ju Tonboe, Rasmus Tage Noh, Young‐Chan Kwon, In‐Hyuk Kim, Sang‐Woo Maturilli, Marion Kim, Hyun‐Cheol Liu, Chao 2023-06-06 application/pdf http://www.osti.gov/servlets/purl/1975666 https://www.osti.gov/biblio/1975666 https://doi.org/10.1002/qj.4492 unknown http://www.osti.gov/servlets/purl/1975666 https://www.osti.gov/biblio/1975666 https://doi.org/10.1002/qj.4492 doi:10.1002/qj.4492 54 ENVIRONMENTAL SCIENCES 2023 ftosti https://doi.org/10.1002/qj.4492 2023-07-11T10:27:22Z Data assimilation of satellite microwave measurements is one of the important keys to improving weather forecasting over the Arctic region. However, the use of surface-sensitive microwave-sounding channel measurements for data assimilation or retrieval has been limited, especially during winter, due to the poorly constrained sea ice emissivity. In this study, aiming at more use of those channel measurements in the data assimilation, we propose an explicit method for specifying the surface radiative boundary conditions (namely emissivity and emitting layer temperature of snow and ice). These were explicitly determined with a radiative transfer model for snow and ice and with snow/ice physical parameters (i.e., snow/ice depths and vertical distributions of temperature, density, salinity, and grain size) simulated from the thermodynamically-driven snow/ice growth model. Here we conducted 1-D Var experiments in order to examine whether this approach can help to use the surface-sensitive microwave temperature channel measurements over the Arctic sea ice region for data assimilation. Results show that (1) the surface-sensitive microwave channels can be used in the 1-D Var retrieval, and (2) the specification of the radiative boundary condition at the surface using the snow/sea ice emission model can significantly improve the atmospheric temperature retrieval, especially in the lower troposphere (500 hPa to surface). The successful retrieval suggests that useful information can be extracted from surface-sensitive microwave-sounding channel radiances over sea ice surfaces through the explicit determination of snow/ice emissivity and emitting layer temperature. Other/Unknown Material Arctic Sea ice SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Quarterly Journal of the Royal Meteorological Society |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Kang, Eui‐Jong Sohn, Byung‐Ju Tonboe, Rasmus Tage Noh, Young‐Chan Kwon, In‐Hyuk Kim, Sang‐Woo Maturilli, Marion Kim, Hyun‐Cheol Liu, Chao Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Data assimilation of satellite microwave measurements is one of the important keys to improving weather forecasting over the Arctic region. However, the use of surface-sensitive microwave-sounding channel measurements for data assimilation or retrieval has been limited, especially during winter, due to the poorly constrained sea ice emissivity. In this study, aiming at more use of those channel measurements in the data assimilation, we propose an explicit method for specifying the surface radiative boundary conditions (namely emissivity and emitting layer temperature of snow and ice). These were explicitly determined with a radiative transfer model for snow and ice and with snow/ice physical parameters (i.e., snow/ice depths and vertical distributions of temperature, density, salinity, and grain size) simulated from the thermodynamically-driven snow/ice growth model. Here we conducted 1-D Var experiments in order to examine whether this approach can help to use the surface-sensitive microwave temperature channel measurements over the Arctic sea ice region for data assimilation. Results show that (1) the surface-sensitive microwave channels can be used in the 1-D Var retrieval, and (2) the specification of the radiative boundary condition at the surface using the snow/sea ice emission model can significantly improve the atmospheric temperature retrieval, especially in the lower troposphere (500 hPa to surface). The successful retrieval suggests that useful information can be extracted from surface-sensitive microwave-sounding channel radiances over sea ice surfaces through the explicit determination of snow/ice emissivity and emitting layer temperature. |
author |
Kang, Eui‐Jong Sohn, Byung‐Ju Tonboe, Rasmus Tage Noh, Young‐Chan Kwon, In‐Hyuk Kim, Sang‐Woo Maturilli, Marion Kim, Hyun‐Cheol Liu, Chao |
author_facet |
Kang, Eui‐Jong Sohn, Byung‐Ju Tonboe, Rasmus Tage Noh, Young‐Chan Kwon, In‐Hyuk Kim, Sang‐Woo Maturilli, Marion Kim, Hyun‐Cheol Liu, Chao |
author_sort |
Kang, Eui‐Jong |
title |
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
title_short |
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
title_full |
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
title_fullStr |
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
title_full_unstemmed |
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface–sensitive microwave channels |
title_sort |
explicitly determined sea ice emissivity and emission temperature over the arctic for surface–sensitive microwave channels |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1975666 https://www.osti.gov/biblio/1975666 https://doi.org/10.1002/qj.4492 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
http://www.osti.gov/servlets/purl/1975666 https://www.osti.gov/biblio/1975666 https://doi.org/10.1002/qj.4492 doi:10.1002/qj.4492 |
op_doi |
https://doi.org/10.1002/qj.4492 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
_version_ |
1772812037757337600 |