Measurements of spectral snow albedo at Neumayer, Antarctica
Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70 390 S, 8 150 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 decre...
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ftunivhannover:oai:www.repo.uni-hannover.de:123456789/80 2023-07-16T03:54:08+02:00 Measurements of spectral snow albedo at Neumayer, Antarctica Wuttke, Sigrid Seckmeyer, Gunther König-Langlo, Gert 2006-03-07 http://www.repo.uni-hannover.de/handle/123456789/80 https://doi.org/10.15488/62 eng eng Göttingen : Copernicus DOI:http://dx.doi.org/10.5194/angeo-24-7-2006 ISSN:0992-7689 http://dx.doi.org/10.15488/62 http://www.repo.uni-hannover.de/handle/123456789/80 CC BY 3.0 Unported http://creativecommons.org/licenses/by/3.0/ frei zugänglich Annales Geophysicae 24 (2006), Nr. 1 polar meteorology radiative process atmospheric composition atmospheric structure transmission of radiation scattering of radiation meteorology atmospheric dynamics inhomogeneous surface albedo radiative-transfer uv irradiance erythemal irradiance davis station sea-ice ultraviolet spectroradiometers eflectance model Antarctica Polarmeteorologie Strahlungsprozess Zusammensetzung Struktur Atmosphäre Strahlungsübertragung Strahlungsstreuung Meteorologie Atmosphärische Dynamik Antarktis ddc:550 ddc:551 Strahlung Ultraviolett Albedo status-type:publishedVersion doc-type:Article doc-type:Text 2006 ftunivhannover https://doi.org/10.15488/6210.5194/angeo-24-7-2006 2023-06-28T10:35:54Z Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70 390 S, 8 150 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 Antarktis* Sea ice Institutional Repository of Leibniz Universität Hannover Austral Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) Neumayer |
institution |
Open Polar |
collection |
Institutional Repository of Leibniz Universität Hannover |
op_collection_id |
ftunivhannover |
language |
English |
topic |
polar meteorology radiative process atmospheric composition atmospheric structure transmission of radiation scattering of radiation meteorology atmospheric dynamics inhomogeneous surface albedo radiative-transfer uv irradiance erythemal irradiance davis station sea-ice ultraviolet spectroradiometers eflectance model Antarctica Polarmeteorologie Strahlungsprozess Zusammensetzung Struktur Atmosphäre Strahlungsübertragung Strahlungsstreuung Meteorologie Atmosphärische Dynamik Antarktis ddc:550 ddc:551 Strahlung Ultraviolett Albedo |
spellingShingle |
polar meteorology radiative process atmospheric composition atmospheric structure transmission of radiation scattering of radiation meteorology atmospheric dynamics inhomogeneous surface albedo radiative-transfer uv irradiance erythemal irradiance davis station sea-ice ultraviolet spectroradiometers eflectance model Antarctica Polarmeteorologie Strahlungsprozess Zusammensetzung Struktur Atmosphäre Strahlungsübertragung Strahlungsstreuung Meteorologie Atmosphärische Dynamik Antarktis ddc:550 ddc:551 Strahlung Ultraviolett Albedo Wuttke, Sigrid Seckmeyer, Gunther König-Langlo, Gert Measurements of spectral snow albedo at Neumayer, Antarctica |
topic_facet |
polar meteorology radiative process atmospheric composition atmospheric structure transmission of radiation scattering of radiation meteorology atmospheric dynamics inhomogeneous surface albedo radiative-transfer uv irradiance erythemal irradiance davis station sea-ice ultraviolet spectroradiometers eflectance model Antarctica Polarmeteorologie Strahlungsprozess Zusammensetzung Struktur Atmosphäre Strahlungsübertragung Strahlungsstreuung Meteorologie Atmosphärische Dynamik Antarktis ddc:550 ddc:551 Strahlung Ultraviolett Albedo |
description |
Spectral albedo in high resolution, from 290 to 1050 nm, has been measured at Neumayer, Antarctica, (70 390 S, 8 150 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 |
Wuttke, Sigrid Seckmeyer, Gunther König-Langlo, Gert |
author_facet |
Wuttke, Sigrid Seckmeyer, Gunther König-Langlo, Gert |
author_sort |
Wuttke, Sigrid |
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 |
Göttingen : Copernicus |
publishDate |
2006 |
url |
http://www.repo.uni-hannover.de/handle/123456789/80 https://doi.org/10.15488/62 |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) |
geographic |
Austral Davis Station Davis-Station Neumayer |
geographic_facet |
Austral Davis Station Davis-Station Neumayer |
genre |
Antarc* Antarctica Antarktis* Sea ice |
genre_facet |
Antarc* Antarctica Antarktis* Sea ice |
op_source |
Annales Geophysicae 24 (2006), Nr. 1 |
op_relation |
DOI:http://dx.doi.org/10.5194/angeo-24-7-2006 ISSN:0992-7689 http://dx.doi.org/10.15488/62 http://www.repo.uni-hannover.de/handle/123456789/80 |
op_rights |
CC BY 3.0 Unported http://creativecommons.org/licenses/by/3.0/ frei zugänglich |
op_doi |
https://doi.org/10.15488/6210.5194/angeo-24-7-2006 |
_version_ |
1771551350118678528 |