Measurements of spectral snow albedo at Neumayer, Antarctica
International audience 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...
Main Authors: | , , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.science/hal-00317910 https://hal.science/hal-00317910/document https://hal.science/hal-00317910/file/angeo-24-7-2006.pdf |
id |
ftccsdartic:oai:HAL:hal-00317910v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00317910v1 2024-02-11T09:58:54+01:00 Measurements of spectral snow albedo at Neumayer, Antarctica Wuttke, S. Seckmeyer, G. König-Langlo, G. Institute of Meteorology and Climatology Hannover (IMUK) Leibniz Universität Hannover=Leibniz University Hannover Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association 2006-03-07 https://hal.science/hal-00317910 https://hal.science/hal-00317910/document https://hal.science/hal-00317910/file/angeo-24-7-2006.pdf en eng HAL CCSD European Geosciences Union hal-00317910 https://hal.science/hal-00317910 https://hal.science/hal-00317910/document https://hal.science/hal-00317910/file/angeo-24-7-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317910 Annales Geophysicae, 2006, 24 (1), pp.7-21 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2024-01-21T00:48:52Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Austral Neumayer |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Wuttke, S. Seckmeyer, G. König-Langlo, G. Measurements of spectral snow albedo at Neumayer, Antarctica |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
Institute of Meteorology and Climatology Hannover (IMUK) Leibniz Universität Hannover=Leibniz University Hannover Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association |
format |
Article in Journal/Newspaper |
author |
Wuttke, S. Seckmeyer, G. König-Langlo, G. |
author_facet |
Wuttke, S. Seckmeyer, G. König-Langlo, G. |
author_sort |
Wuttke, S. |
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 |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00317910 https://hal.science/hal-00317910/document https://hal.science/hal-00317910/file/angeo-24-7-2006.pdf |
geographic |
Austral Neumayer |
geographic_facet |
Austral Neumayer |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317910 Annales Geophysicae, 2006, 24 (1), pp.7-21 |
op_relation |
hal-00317910 https://hal.science/hal-00317910 https://hal.science/hal-00317910/document https://hal.science/hal-00317910/file/angeo-24-7-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1790594704894590976 |