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Show simple item record Ramoelo, Abel Majozi, N Mathieu, Renaud SA Jovanovic, Nebojsa Nickless, A Dzikiti, Sebinasi 2014-10-09T12:07:07Z 2014-10-09T12:07:07Z 2014-08
dc.identifier.citation Ramoelo, A., Majozi, N., Mathieu, R., Jovanovic, N., Nickless, A. and Dzikiti, S. 2014. Validation of global evapotranspiration product (MOD16) using flux tower data in the African savanna, South Africa. Remote Sensing, vol. 6(8), pp 7406-7423 en_US
dc.identifier.issn 2072-4292
dc.description Copyright: 2014 MDPI. This is an OA journal. The journal authorizes the publication of the information herewith contained. Published in Remote Sensing, vol. 6(8), pp 7406-7423 en_US
dc.description.abstract Globally, water is an important resource required for the survival of human beings. Water is a scarce resource in the semi-arid environments, including South Africa. In South Africa, several studies have quantified evapotranspiration (ET) in different ecosystems at a local scale. Accurate spatially explicit information on ET is rare in the country mainly due to lack of appropriate tools. In recent years, a remote sensing ET product from the MODerate Resolution Imaging Spectrometer (MOD16) has been developed. However, its accuracy is not known in South African ecosystems. The objective of this study was to validate the MOD16 ET product using data from two eddy covariance flux towers, namely; Skukuza and Malopeni installed in a savanna and woodland ecosystem within the Kruger National Park, South Africa. Eight day cumulative ET data from the flux towers was calculated to coincide with the eight day MOD16 products over a period of 10 years from 2000 to 2010. The Skukuza flux tower results showed inconsistent comparisons with MOD16 ET. The Malopeni site achieved a poorer comparison with MOD16 ET compared to the Skukuza, and due to a shorter measurement period, data validation was performed for 2009 only. The inconsistent comparison of MOD16 and flux tower-based ET can be attributed to, among other things, the parameterization of the Penman-Monteith model, flux tower measurement errors, and flux tower footprint vs. MODIS pixel. MOD16 is important for global inference of ET, but for use in South Africa’s integrated water management, a locally parameterized and improved product should be developed. en_US
dc.language.iso en en_US
dc.publisher MDPI en_US
dc.relation.ispartofseries Workflow;13412
dc.subject Evapotranspiration en_US
dc.subject MODerate Resolution Imaging Spectrometer en_US
dc.subject MOD16 en_US
dc.subject African Savanna en_US
dc.subject Eddy covariance en_US
dc.subject Flux tower en_US
dc.subject Penman-Monteith en_US
dc.title Validation of global evapotranspiration product (MOD16) using flux tower data in the African savanna, South Africa en_US
dc.type Article en_US

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