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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 | Role of Integrins in Cell Invasion and Migration显示文摘 | John DH David AC | 2002 | Nat Cancer Rev2002，，2： | 1 |
| 3 | Common gait abnormalities of the knee in cerebral palsy显示文摘 | Sutherland DH Davids JR | 1993 | Oin Orthopaedics Related Res1993，，288： | 1 |
| 4 | Development and Testing of a 2-D Transfer CCD显示文摘 | David RS Andrew DH Adrian Martin | 2006 | IEEE Transactions on electron devices2006，53，11： | 1 |
| 5 | Serum γ- Glutamyhransferase was differently associated with microalbuminuria by status of hyperten- sion or diabetes : the coronary artery risk development in young adults (CARDIA) study显示文摘 | Lee DH J R David G Myron | 2005 | Clin Chem2005，51，： | 1 |
| 6 | Physician behaviors that predict patient trust显示文摘 | David DH | 2001 | The Journal of Family Practice2001，4，50： | 1 |
| 7 | Phase II trial of paclitaxel,carboplatin,and etoposide in advanced poorly differentiated neuroendocrine carcinoma: a minnie pearl cancer research network study 显示文摘 | John DH David R Litchy S | 2006 | J Clin Oncol2006，24，22： | 1 |
| 8 | Hemorrhagic cystitis in bone marrow transplantation显示文摘 | Claire YC David DH Douglas CL | 1994 | Urology1994，44，3： | 1 |
| 9 | The human serum metabolome 显示文摘 | Psychogios N David DH Jun P | 2011 | PloS One2011，6，2： | 1 |
| 10 | Physical evidence of McsS,a QTL controlling mammary carcinoma susceptibility,in congenic rats显示文摘 | Jill DH Hong L Dinelli MM Millicent AS Bradley DK Michael NG | 2003 | Carcinogenesis2003，24，9： | 1 |
| 11 | Adhesion testing of dentin bonding agents:A review显示文摘 | David H Pashley DH Sano H | 1995 | Dent Mater1995，10，： | 1 |
| 12 | Bone marrow as a source of endothelial cells and neu N-expressing cells after stroke 显示文摘 | David CH William DH Angeline Martin-Studdard | 2002 | Stroke2002，33，： | 1 |
| 13 | Quadriceps tendon ruptures after total knee arthroplasty 显示文摘 | Ryan ED Arlen DH David G | 2005 | JBJS2005，，： | 1 |
| 14 | Phase Ⅱ trial of paclitaxel,carboplatin,and etoposide in advanced poorly differentiated neuroendocrine carcinoma:A minnie pearl cancer research network study显示文摘 | John DH David R | | J Clin Oncol0，24，： | 1 |
| 15 | Serum γ-Glutamyltransferase was differently associated with microalbuminuria by status of hypertension or diabetes:the coronary artery risk devepment in young adults(CARDIA)study显示文摘 | Lee DH David JR Myron G | 2005 | Clin Chem2005，51，： | 1 |
| 16 | γ-Glutamyltransferase is a predictor of incident diabetes and hypertension:the coronary artery risk development in young adults(CARDIA)study显示文摘 | Lee DH David RJ Myron G | 2003 | Clin Chem2003，49，： | 1 |
| 17 | Phase H trial of paclitaxel,car-boplatin, and etoposide in advanced poorly differentiated neuroen-docrine carcinoma : A minnie pearl cancer research network study显示文摘 | John DH David R Litchy S | 2006 | J Clin Oncol2006，24，22： | 1 |
| 18 | Patriline composition of worker populations in honeybee (Apis mellifera) colonies headed by queens inseminated with semen from African and European drones 显示文摘 | GLORIA DH DAVID RT STANLEY SS | 2003 | Apidology2003，34，： | 1 |
| 19 | Hypnosis decreases presurgical distress in excisional breast biopsy patients显示文摘 | Schnur JB Bovbjerg DH David D | | 0，，02： | 1 |
| 20 | Structural basis for agonism and antagonism of hepatoeyte growth factor 显示文摘 | W David T Jennifer DH Ermanno G | 2010 | Proceedings of the National Academy of Sciences of the United States of America2010，107，13： | 1 |
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