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| 1 | Comparison of two remote sensing models for estimating evapotranspiration: algorithm evaluation and application in seasonally arid ecosystems in South Africa显示文摘Remote sensing tools are becoming increasingly important for providing spatial information on water use by different ecosystems. Despite significant advances in remote sensing based evapotranspiration(ET) models in recent years, important information gaps still exist on the accuracy of the models particularly in arid and semi-arid environments. In this study, we evaluated the Penman-Monteith based MOD16 and the modified Priestley-Taylor(PT-JPL) models at the daily time step against three measured ET datasets. We used data from two summer and one winter rainfall sites in South Africa. One site was dominated by native broad leaf and the other by fine leafed deciduous savanna tree species and C4 grasses. The third site was in the winter rainfall Cape region and had shrubby fynbos vegetation. Actual ET was measured using open-path eddy covariance systems at the summer rainfall sites while a surface energy balance system utilizing the large aperture boundary layer scintillometer was used in the Cape. Model performance varied between sites and between years with the worst estimates(R2<0.50 and RMSE>0.80 mm/d) observed during years with prolonged mid-summer dry spells in the summer rainfall areas. Sensitivity tests on MOD16 showed that the leaf area index, surface conductance and radiation budget parameters had the largest effect on simulated ET. MOD16 ET predictions were improved by:(1) reformulating the emissivity expressions in the net radiation equation;(2) incorporating representative surface conductance values;and(3) including a soil moisture stress function in the transpiration sub-model. Implementing these changes increased the accuracy of MOD16 daily ET predictions at all sites. However, similar adjustments to the PT-JPL model yielded minimal improvements. We conclude that the MOD16 ET model has the potential to accurately predict water use in arid environments provided soil water stress and accurate biome-specific parameters are incorporated. | Sebinasi DZIKITI Nebo Z JOVANOVIC Richard DH BUGAN Abel RAMOELO Nobuhle P MAJOZI Alecia NICKLESS Moses A CHO David C LE MAITRE Zanele NTSHIDI Harrison H PIENAAR | 2019 | Journal of Arid Land2019，11，4： | 4 |
| 2 | Localiza-tion of deg- radative enzymes and their inhibitors in the degen-erate human intervertebral disc显示文摘 | Ie MAITRE C L FREEMONT AJ HOYLANDJ A | 2004 | J Pathol2004，204，： | 1 |
| 3 | Current under- standing of cellular and molecular events in intervertebral disc degeneration: implications for therapy显示文摘 | Freemont AJ Watkins A Le Maitre C | 2002 | J Pathol2002，196，4： | 1 |
| 4 | The role of interleukin-1 in the pathogenesis of human intervertebral disc degeneration 显示文摘 | Le MAITRE C L FREEMONT A J HOYLAND J A | 2005 | Arthritis Res Ther2005，7，4： | 1 |
| 5 | Current understanding of cellular and molecular events in intervertebral disc degeneration:implications for therapy显示文摘 | Freemont A J Watkins A Le Maitre C | | 0，，： | 1 |
| 6 | Amoxicillin plus clavulanic acid versus appendicectomy for treatment of acute uncomplicated appendicitis:an open-label,non-inferiority,randomised controlled trial显示文摘 | VONS C BARRY C MAITRE S | 2011 | Lancet2011，377，9777： | 1 |
| 7 | Endoplasmic reticulum stress:cell life and death decisions 显示文摘 | Xu C Bailly- Maitre B Reed JC | 2005 | J Clin Invest2005，115，10： | 1 |
| 8 | Current understanding of cellular and molecular events in intervertebral disc degeneration:implications for therapy显示文摘 | FREEMONT A J WATKINS A LE MAITRE C | 2002 | Pathol2002，196，： | 1 |
| 9 | Amoxicillin plus clavulanic acid versus appendicectomy fortreatment of acute uncomplicated appendicitis : an open-label, non-inferiority, randomised controlled trial显示文摘 | Vans C Barry C Maitre S | 2011 | Lancet2011，377，9777： | 1 |
| 10 | Linking ecosystem services and water resources:Landscape-scale hydrology of the Little Karoo显示文摘 | Le Maitre D C Milton S J Jarmain C | 2007 | Frontiers in Ecology and the Environment2007，5，5： | 1 |
| 11 | A Fusion Scheme for Joint Retrieval of Urban Height Map Classification from High resolu tion Interferometric SAR Images显示文摘 | Tison C Tupin F Maitre H | 2007 | IEEE Transactions on Geoscience and Remote Sensing2007，45，2： | 1 |
| 12 | Measurement of vitellogenin from rainbow trout by rokct immunoelectrophoresis : application to the kinetic analysis of estrogen stimulation in the male 显示文摘 | Maitre J L Guellce C L Derrien S | 1985 | Can J Biochem Cell Biol1985，53，： | 1 |
| 13 | Endoplasmie retieulum stress:eell life and death deeisions显示文摘 | Xu C Baill~Maitre B Reed JC | 2005 | J Clin Invest2005，115，10： | 1 |
| 14 | Investigation of the role of IL-1 and TNF in matrix degradation in the intervertebral disc显示文摘 | Hoyland JA Le Maitre C Freemont AJ | | 0，，： | 1 |
| 15 | Modelling horses for novel climate courses: insights from projecting potential distributions of native and alien Australian acacias with correlative and mechanistic models 显示文摘 | Webber B L Yates C J Le Maitre D C | 2011 | Diversity and Distributions2011，17，5： | 1 |
| 16 | Amoxicillin plus clavulanic acidversus appendicectomy for treatment of acute uncomplicatedappendicitis:an open-label, non-inferiority, randomised controlledtrial 显示文摘 | Vons C Barry C Maitre S | 2011 | Lancet2011，377，9777： | 1 |
| 17 | The Role of Interleukin-1 in the Pathogenesis of Human Intertebral Disc Degeneration显示文摘 | Le Maitre C L Freemont A J Hoyland J A | 2005 | Arthritis Res Ther2005，7，4： | 1 |
| 18 | 3D reconstruction of urban scenes from aerial stereo imagery: a focusing strategy显示文摘 | BAILLARD C MAITRE H | 1999 | Computer Vision and Image Understanding1999，76，3： | 1 |
| 19 | Partially cavitating hydrofoils: experimental and numerical analysis 显示文摘 | Maitre T Brian-Marjollet L | 2000 | Journal of Ship Research2000，44，1： | 1 |
| 20 | A review of information on interactions between vegetation and groundwater显示文摘 | Maitre D C Scott D F Colvin C | 1999 | Water SA1999，25，2： | 1 |
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