Geosciences 2016, 6(2), 27; https://doi.org/10.3390/geosciences6020027
Surface Area Variability of a North-Central Tanzanian Crater Lake
Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm 106 91, Sweden
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Academic Editors: Mary J. Thornbush and Nir Y. Krakauer
Received: 18 February 2016 / Revised: 30 May 2016 / Accepted: 31 May 2016 / Published: 8 June 2016
(This article belongs to the Special Issue Climate Change and Geosciences)
Abstract
A history of modern (1973–2015) surface area variability for Lake Basotu in north-central Tanzania has been reconstructed using archived Landsat images from the dry season between June and October. This record was compared to local weather data as well as larger scale weather patterns. The lake has been in a state of decline interrupted by major flood events since the beginning of the satellite record. From 1973 to 1997, the lake area was between 0.97 km2 and 4.28 km2. Lake extent abruptly increased to 13.86 km2 in 1998, when a co-occurrence of El Niño and a positive Indian Ocean Dipole led to extensive flooding. It is hypothesized that local agricultural practices leading to soil erosion and subsequent basin sedimentation have most likely increased the sensitivity of Lake Basotu to climatic fluctuations. View Full-TextKeywords:
temperature fluctuations; El Niño; climate change; Indian Ocean
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Higgins, L.; Koutsouris, A.J.; Westerberg, L.-O.; Risberg, J. Surface Area Variability of a North-Central Tanzanian Crater Lake. Geosciences 2016, 6, 27.
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