Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica
The surface spectral albedo was measured over coastal landfast sea ice in Prydz Bay (off Zhongshan Station), East Antarctica from 5 October to 26 November of 2016. The mean albedo decreased from late-spring to early-summer, mainly responding to the change in surface conditions from dry (phase I) to...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2021-02-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143020000908/type/journal_article |
| _version_ | 1811155834176012288 |
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| author | Guanghua Hao Roberta Pirazzini Qinghua Yang Zhongxiang Tian Changwei Liu |
| author_facet | Guanghua Hao Roberta Pirazzini Qinghua Yang Zhongxiang Tian Changwei Liu |
| author_sort | Guanghua Hao |
| collection | DOAJ |
| description | The surface spectral albedo was measured over coastal landfast sea ice in Prydz Bay (off Zhongshan Station), East Antarctica from 5 October to 26 November of 2016. The mean albedo decreased from late-spring to early-summer, mainly responding to the change in surface conditions from dry (phase I) to wet (phase II). The evolution of the albedo was strongly influenced by the surface conditions, with alternation of frequent snowfall events and katabatic wind that induce snow blowing at the surface. The two phases and day-to-day albedo variability were more pronounced in the near-infrared albedo wavelengths than in the visible ones, as the near-infrared photons are more sensitive to snow metamorphism, and to changes in the uppermost millimeters and water content of the surface. The albedo diurnal cycle during clear sky conditions was asymmetric with respect to noon, decreasing from morning to evening over full and patchy snow cover, and decreasing more rapidly in the morning over bare ice. We conclude that snow and ice metamorphism and surface melting dominated over the solar elevation angle dependency in shaping the albedo evolution. However, we realize that more detailed surface observations are needed to clarify and quantify the role of the various surface processes. |
| first_indexed | 2024-04-10T04:40:15Z |
| format | Article |
| id | doaj.art-f5cac555a60948eaac9ffcd65dbdd7a1 |
| institution | Directory Open Access Journal |
| issn | 0022-1430 1727-5652 |
| language | English |
| last_indexed | 2024-04-10T04:40:15Z |
| publishDate | 2021-02-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj.art-f5cac555a60948eaac9ffcd65dbdd7a12023-03-09T12:41:02ZengCambridge University PressJournal of Glaciology0022-14301727-56522021-02-016712613610.1017/jog.2020.90Spectral albedo of coastal landfast sea ice in Prydz Bay, AntarcticaGuanghua Hao0Roberta Pirazzini1Qinghua Yang2https://orcid.org/0000-0002-7114-2036Zhongxiang Tian3Changwei Liu4Key Laboratory of Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Ministry of Natural Resources, Beijing 100081, ChinaFinnish Meteorological Institute, Helsinki 00101, FinlandSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, ChinaKey Laboratory of Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Ministry of Natural Resources, Beijing 100081, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, ChinaThe surface spectral albedo was measured over coastal landfast sea ice in Prydz Bay (off Zhongshan Station), East Antarctica from 5 October to 26 November of 2016. The mean albedo decreased from late-spring to early-summer, mainly responding to the change in surface conditions from dry (phase I) to wet (phase II). The evolution of the albedo was strongly influenced by the surface conditions, with alternation of frequent snowfall events and katabatic wind that induce snow blowing at the surface. The two phases and day-to-day albedo variability were more pronounced in the near-infrared albedo wavelengths than in the visible ones, as the near-infrared photons are more sensitive to snow metamorphism, and to changes in the uppermost millimeters and water content of the surface. The albedo diurnal cycle during clear sky conditions was asymmetric with respect to noon, decreasing from morning to evening over full and patchy snow cover, and decreasing more rapidly in the morning over bare ice. We conclude that snow and ice metamorphism and surface melting dominated over the solar elevation angle dependency in shaping the albedo evolution. However, we realize that more detailed surface observations are needed to clarify and quantify the role of the various surface processes.https://www.cambridge.org/core/product/identifier/S0022143020000908/type/journal_articleAntarcticobservationsea icespectral albedo |
| spellingShingle | Guanghua Hao Roberta Pirazzini Qinghua Yang Zhongxiang Tian Changwei Liu Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica Journal of Glaciology Antarctic observation sea ice spectral albedo |
| title | Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica |
| title_full | Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica |
| title_fullStr | Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica |
| title_full_unstemmed | Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica |
| title_short | Spectral albedo of coastal landfast sea ice in Prydz Bay, Antarctica |
| title_sort | spectral albedo of coastal landfast sea ice in prydz bay antarctica |
| topic | Antarctic observation sea ice spectral albedo |
| url | https://www.cambridge.org/core/product/identifier/S0022143020000908/type/journal_article |
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