Radiation Measurements Mount Kenya, At Lewis Kenya
ABSTRACT. Short- and long-wave radiation on variously oriented vertical surfaces, direct solar radiation, global radiation, and long-wave radiation on a horizontal surface were measured on Lewis Glacier, Mount Kenya, at 4 800 m. For the orientation of vertical surfaces, the following azimuths were s...
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University of Nairobi
1980
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ftunivnairobi:oai:http://erepository.uonbi.ac.ke:11295/72637 2024-09-15T18:17:49+00:00 Radiation Measurements Mount Kenya, At Lewis Kenya Hastenrath, Stefan Patnaik, J. K. 1980 application/pdf http://hdl.handle.net/11295/72637 en eng University of Nairobi Hastenrath, Stefan., Patnaik, J K., (1980). Radiation Measurements Mount Kenya. Jounud of Glaciology, 25 (93), PP.439-444 http://hdl.handle.net/11295/72637 en_US 1980 ftunivnairobi 2024-07-26T03:52:59Z ABSTRACT. Short- and long-wave radiation on variously oriented vertical surfaces, direct solar radiation, global radiation, and long-wave radiation on a horizontal surface were measured on Lewis Glacier, Mount Kenya, at 4 800 m. For the orientation of vertical surfaces, the following azimuths were selected: 45°, facing the steep slope of the upper glacier; 135°, facing a rock ridge and some glacier surface in the foreground; 225°, facing down-glacier towards the Teleki valley with open sky occupying much of the view; and 315°, directed towards the steep south-east face of the Nelion peak. The horizontal components of diffuse short-wave radiation reach a magnitude comparable to those of direct radiation. As a result of contrastingly different albedos of natural surfaces, the horizontal component of diffuse short-wave radiation is particularly large from the direction of the upper glacier, with values around 330-500 W m-', and smallest from the direction of the rock face of Nelion peak, where values are around 150-330 W m-'. Long-wave radiation seems enhanced from the direction of the Nelion face, and reduced from the azimuth of the upper glacier, thus apparently reflecting differences in emissivity and temperature. Other/Unknown Material Lewis Glacier University of Nairobi Digital Repository |
institution |
Open Polar |
collection |
University of Nairobi Digital Repository |
op_collection_id |
ftunivnairobi |
language |
English |
description |
ABSTRACT. Short- and long-wave radiation on variously oriented vertical surfaces, direct solar radiation, global radiation, and long-wave radiation on a horizontal surface were measured on Lewis Glacier, Mount Kenya, at 4 800 m. For the orientation of vertical surfaces, the following azimuths were selected: 45°, facing the steep slope of the upper glacier; 135°, facing a rock ridge and some glacier surface in the foreground; 225°, facing down-glacier towards the Teleki valley with open sky occupying much of the view; and 315°, directed towards the steep south-east face of the Nelion peak. The horizontal components of diffuse short-wave radiation reach a magnitude comparable to those of direct radiation. As a result of contrastingly different albedos of natural surfaces, the horizontal component of diffuse short-wave radiation is particularly large from the direction of the upper glacier, with values around 330-500 W m-', and smallest from the direction of the rock face of Nelion peak, where values are around 150-330 W m-'. Long-wave radiation seems enhanced from the direction of the Nelion face, and reduced from the azimuth of the upper glacier, thus apparently reflecting differences in emissivity and temperature. |
format |
Other/Unknown Material |
author |
Hastenrath, Stefan Patnaik, J. K. |
spellingShingle |
Hastenrath, Stefan Patnaik, J. K. Radiation Measurements Mount Kenya, At Lewis Kenya |
author_facet |
Hastenrath, Stefan Patnaik, J. K. |
author_sort |
Hastenrath, Stefan |
title |
Radiation Measurements Mount Kenya, At Lewis Kenya |
title_short |
Radiation Measurements Mount Kenya, At Lewis Kenya |
title_full |
Radiation Measurements Mount Kenya, At Lewis Kenya |
title_fullStr |
Radiation Measurements Mount Kenya, At Lewis Kenya |
title_full_unstemmed |
Radiation Measurements Mount Kenya, At Lewis Kenya |
title_sort |
radiation measurements mount kenya, at lewis kenya |
publisher |
University of Nairobi |
publishDate |
1980 |
url |
http://hdl.handle.net/11295/72637 |
genre |
Lewis Glacier |
genre_facet |
Lewis Glacier |
op_relation |
Hastenrath, Stefan., Patnaik, J K., (1980). Radiation Measurements Mount Kenya. Jounud of Glaciology, 25 (93), PP.439-444 http://hdl.handle.net/11295/72637 |
_version_ |
1810455922138415104 |