Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface‐sensitive microwave channels
Abstract 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 wi...
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crwiley:10.1002/qj.4492 2024-06-02T08:01:28+00:00 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 http://dx.doi.org/10.1002/qj.4492 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4492 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Quarterly Journal of the Royal Meteorological Society volume 149, issue 754, page 2011-2030 ISSN 0035-9009 1477-870X journal-article 2023 crwiley https://doi.org/10.1002/qj.4492 2024-05-03T11:45:27Z Abstract 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. We conducted 1D‐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 1D‐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. Article in Journal/Newspaper Arctic Sea ice Wiley Online Library Arctic Quarterly Journal of the Royal Meteorological Society 149 754 2011 2030 |
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Wiley Online Library |
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English |
description |
Abstract 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. We conducted 1D‐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 1D‐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. |
format |
Article in Journal/Newspaper |
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 |
spellingShingle |
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 |
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 |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/qj.4492 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4492 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 149, issue 754, page 2011-2030 ISSN 0035-9009 1477-870X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/qj.4492 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
149 |
container_issue |
754 |
container_start_page |
2011 |
op_container_end_page |
2030 |
_version_ |
1800745838380580864 |