The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements
The temporal and spatial variations in the surface albedo of the Vatnajökull ice cap, Iceland, are investigated. A time series of the surface albedo is composed for the summer of 1996 using satellite radiance measurements from the Advanced Very High Resolution Radiometer (AVHRR). This time series is...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/21582 2023-07-23T04:19:45+02:00 The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements Reijmer, C. Knap, W.H. Oerlemans, J. 1999 image/pdf https://dspace.library.uu.nl/handle/1874/21582 en eng 1573-1472 https://dspace.library.uu.nl/handle/1874/21582 info:eu-repo/semantics/ClosedAccess Natuur- en Sterrenkunde Surface albedo Iceland Satellite-derived measurements Temporal variability Spatial variability Article 1999 ftunivutrecht 2023-07-01T23:19:05Z The temporal and spatial variations in the surface albedo of the Vatnajökull ice cap, Iceland, are investigated. A time series of the surface albedo is composed for the summer of 1996 using satellite radiance measurements from the Advanced Very High Resolution Radiometer (AVHRR). This time series is compared with ground measurements carried out during a glacio-meteorological experiment during the same summer on the ice cap. The AVHRR is able to reproduce the development in time of the surface albedo fairly well. The large systematic differences found for some of the stations on the ice are attributed to sub-pixel-scale variations in the albedo. An attempt is made to confirm this hypothesis using satellite radiance measurements carried out by the Thematic Mapper (TM) and measurements made with a portable albedometer. The TM has a pixel size of 30 X 30 m whereas the pixel size of the AVHRR is 1 X 1 km. Although the TM measurements show greater variability in the albedo than do the AVHRR measurements, the large systematic difference remains. Measurements with the portable albedometer show a large spread in the albedo at sites with large systematic differences. This implies that the scale of the albedo variations is smaller than the scale of the AVHRR and TM pixels. Article in Journal/Newspaper Ice cap Iceland Vatnajökull Utrecht University Repository Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Natuur- en Sterrenkunde Surface albedo Iceland Satellite-derived measurements Temporal variability Spatial variability |
spellingShingle |
Natuur- en Sterrenkunde Surface albedo Iceland Satellite-derived measurements Temporal variability Spatial variability Reijmer, C. Knap, W.H. Oerlemans, J. The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
topic_facet |
Natuur- en Sterrenkunde Surface albedo Iceland Satellite-derived measurements Temporal variability Spatial variability |
description |
The temporal and spatial variations in the surface albedo of the Vatnajökull ice cap, Iceland, are investigated. A time series of the surface albedo is composed for the summer of 1996 using satellite radiance measurements from the Advanced Very High Resolution Radiometer (AVHRR). This time series is compared with ground measurements carried out during a glacio-meteorological experiment during the same summer on the ice cap. The AVHRR is able to reproduce the development in time of the surface albedo fairly well. The large systematic differences found for some of the stations on the ice are attributed to sub-pixel-scale variations in the albedo. An attempt is made to confirm this hypothesis using satellite radiance measurements carried out by the Thematic Mapper (TM) and measurements made with a portable albedometer. The TM has a pixel size of 30 X 30 m whereas the pixel size of the AVHRR is 1 X 1 km. Although the TM measurements show greater variability in the albedo than do the AVHRR measurements, the large systematic difference remains. Measurements with the portable albedometer show a large spread in the albedo at sites with large systematic differences. This implies that the scale of the albedo variations is smaller than the scale of the AVHRR and TM pixels. |
format |
Article in Journal/Newspaper |
author |
Reijmer, C. Knap, W.H. Oerlemans, J. |
author_facet |
Reijmer, C. Knap, W.H. Oerlemans, J. |
author_sort |
Reijmer, C. |
title |
The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
title_short |
The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
title_full |
The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
title_fullStr |
The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
title_full_unstemmed |
The surface albedo of the Vatnajökull ice cap, Iceland: comparison between satellite-derived and ground-based measurements |
title_sort |
surface albedo of the vatnajökull ice cap, iceland: comparison between satellite-derived and ground-based measurements |
publishDate |
1999 |
url |
https://dspace.library.uu.nl/handle/1874/21582 |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Vatnajökull |
geographic_facet |
Vatnajökull |
genre |
Ice cap Iceland Vatnajökull |
genre_facet |
Ice cap Iceland Vatnajökull |
op_relation |
1573-1472 https://dspace.library.uu.nl/handle/1874/21582 |
op_rights |
info:eu-repo/semantics/ClosedAccess |
_version_ |
1772183133187211264 |