Measurements of spectral snow albedo at Neumayer, Antarctica
Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70°39' S, 8°15' W) during the austral summer 2003/2004. At 500 nm, the spectral albedo nearly reaches unity, with slightly lower values below and above 500 nm. Above 600 nm, the spectral al...
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ftdoajarticles:oai:doaj.org/article:0e78fc1ebe1346a3a6fc021e9f45ac73 2023-05-15T13:53:54+02:00 Measurements of spectral snow albedo at Neumayer, Antarctica S. Wuttke G. Seckmeyer G. König-Langlo 2006-03-01T00:00:00Z https://doi.org/10.5194/angeo-24-7-2006 https://doaj.org/article/0e78fc1ebe1346a3a6fc021e9f45ac73 EN eng Copernicus Publications https://www.ann-geophys.net/24/7/2006/angeo-24-7-2006.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-24-7-2006 0992-7689 1432-0576 https://doaj.org/article/0e78fc1ebe1346a3a6fc021e9f45ac73 Annales Geophysicae, Vol 24, Pp 7-21 (2006) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2006 ftdoajarticles https://doi.org/10.5194/angeo-24-7-2006 2022-12-31T02:28:56Z Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70°39' S, 8°15' W) during the austral summer 2003/2004. At 500 nm, the spectral albedo nearly reaches unity, with slightly lower values below and above 500 nm. Above 600 nm, the spectral albedo decreases to values between 0.45 and 0.75 at 1000 nm. For one cloudless case an albedo up to 1.01 at 500 nm could be determined. This can be explained by the larger directional component of the snow reflectivity for direct incidence, combined with a slightly mislevelled sensor and the snow surface not being perfectly horizontal. A possible explanation for an observed decline in albedo is an increase in snow grain size. The theoretically predicted increase in albedo with increasing solar zenith angle (SZA) could not be observed. This is explained by the small range of SZA during albedo measurements, combined with the effect of changing snow conditions outweighing the effect of changing SZA. The measured spectral albedo serves as input for radiative transfer models, describing radiation conditions in Antarctica. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Austral Neumayer Annales Geophysicae 24 1 7 21 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 S. Wuttke G. Seckmeyer G. König-Langlo Measurements of spectral snow albedo at Neumayer, Antarctica |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70°39' S, 8°15' W) during the austral summer 2003/2004. At 500 nm, the spectral albedo nearly reaches unity, with slightly lower values below and above 500 nm. Above 600 nm, the spectral albedo decreases to values between 0.45 and 0.75 at 1000 nm. For one cloudless case an albedo up to 1.01 at 500 nm could be determined. This can be explained by the larger directional component of the snow reflectivity for direct incidence, combined with a slightly mislevelled sensor and the snow surface not being perfectly horizontal. A possible explanation for an observed decline in albedo is an increase in snow grain size. The theoretically predicted increase in albedo with increasing solar zenith angle (SZA) could not be observed. This is explained by the small range of SZA during albedo measurements, combined with the effect of changing snow conditions outweighing the effect of changing SZA. The measured spectral albedo serves as input for radiative transfer models, describing radiation conditions in Antarctica. |
format |
Article in Journal/Newspaper |
author |
S. Wuttke G. Seckmeyer G. König-Langlo |
author_facet |
S. Wuttke G. Seckmeyer G. König-Langlo |
author_sort |
S. Wuttke |
title |
Measurements of spectral snow albedo at Neumayer, Antarctica |
title_short |
Measurements of spectral snow albedo at Neumayer, Antarctica |
title_full |
Measurements of spectral snow albedo at Neumayer, Antarctica |
title_fullStr |
Measurements of spectral snow albedo at Neumayer, Antarctica |
title_full_unstemmed |
Measurements of spectral snow albedo at Neumayer, Antarctica |
title_sort |
measurements of spectral snow albedo at neumayer, antarctica |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doi.org/10.5194/angeo-24-7-2006 https://doaj.org/article/0e78fc1ebe1346a3a6fc021e9f45ac73 |
geographic |
Austral Neumayer |
geographic_facet |
Austral Neumayer |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Annales Geophysicae, Vol 24, Pp 7-21 (2006) |
op_relation |
https://www.ann-geophys.net/24/7/2006/angeo-24-7-2006.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-24-7-2006 0992-7689 1432-0576 https://doaj.org/article/0e78fc1ebe1346a3a6fc021e9f45ac73 |
op_doi |
https://doi.org/10.5194/angeo-24-7-2006 |
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Annales Geophysicae |
container_volume |
24 |
container_issue |
1 |
container_start_page |
7 |
op_container_end_page |
21 |
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1766259378202083328 |