Radiation measurement at Lewis Glacier, Mount Kenya, Kenya
Open Access
- 1 January 1980
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Glaciology
- Vol. 25 (93) , 439-444
- https://doi.org/10.1017/s0022143000015288
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 4800 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−2, and smallest from the direction of the rock face of Nelion peak, where values are around 150–330 W m−2. 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.Keywords
This publication has 2 references indexed in Scilit:
- Heat-Budget Measurements on the Quelccaya Ice Cap, Peruvian AndesJournal of Glaciology, 1978
- Glazial-meteorologische Untersuchungen im KarakorumArchives for Meteorology, Geophysics, and Bioclimatology Series B, 1957