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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 | Goal setting outcomes: Examining the role of goal interaction in influencing the experience and learning outcomes of video game play for earthquake preparedness显示文摘 | Tanes Z Cho H | 2013 | Computers in Human Behavior2013，29，3： | 1 |
| 3 | Synthesis and characterization of S-doped ZnO nanowires produced by a simple solution conversion process 显示文摘 | SHEN G Z CHO J H JUNG S I | 2005 | Chem Phys Lett2005，401，456： | 1 |
| 4 | Effect of nano-CeO2 on cobalt-based alloy laser coatings 显示文摘 | Li M X Zhang S H Li H S He Y Z Jae-Hong Yoon and Tong- Yul Cho | 2008 | Journal of Materials Processing Technology2008，202，13： | 1 |
| 5 | Laser clad Ni-base alloy added nano- and micron-size CeO2 composites显示文摘 | Zhang S H Li M X Tong Yul Cho Jae Hong Yoon Chan Gyu Lee and He Y Z | 2008 | Optics & Laser Technology2008，40，5： | 1 |
| 6 | Targetedmetabolomic evaluation of arginine methylation andcardiovascular risks:potential mechanisms beyond ni-tric oxide synthase inhibition显示文摘 | WANG Z TANG W H CHO L | 2009 | ArteriosclerThromb Vasc2009，29，： | 1 |
| 7 | Effects of Bacillus subtil- & UBT-M02 on gt3wth pen%finance, relative immune organ weight, gas concentration in excreta, and intestinal microbial shedding in broiler chickens 显示文摘 | ZHANG Z F CHO J H KIM I H | 2013 | Livestock Science2013，155，2： | 1 |
| 8 | Density and hardness optimized pressureless sintered and post-hot isostatic pressed B4C 显示文摘 | CHO N BAO Z H SPERYER R F | 2005 | J Mater Res2005，20，8： | 1 |
| 9 | New findings of thecorrelation between acupoints and corresponding brain corticesusing functional MRI显示文摘 | Cho Z H Chung S C Jones J P | 1998 | Proc Natl Acad Sci U S A1998，95，5： | 1 |
| 10 | Physical and optical properties of plasma polymerized thin films deposited by PECVD method显示文摘 | Cho S H Park Z T Kim J G | 2003 | Surface and Coatings Technology2003，12，5： | 1 |
| 11 | Extension of analytic function expansion nodal method to multi-group problems in hexagonal-z geometry 显示文摘 | Cho N Z Kim Y H | 1997 | Nucl Sci Eng1997，126，3： | 1 |
| 12 | Effects of sludge retention time on membrane fouling and microbial com- munity structure in a membrane bioreactor显示文摘 | Ahmed Z Cho J Lim B R Song K G Ahn K H | 2007 | Journal of Mem- brane Science2007，287，2： | 1 |
| 13 | Syntheses,Structures and Photophysical Properties of Metal Carbonyl Clusters with Dansyl and Acridone Luminophores显示文摘 | WONG W Y CHO K H LIN Z Y | 2002 | Eur J Inorg Chem2002，8，： | 1 |
| 14 | Neural substrates,experimental evidences and functional hypothesis of acupunc-ture mechanisms显示文摘 | Cho Z H Hwang S C Wong E K | 2006 | Acta Neurol Scand2006，113，6： | 1 |
| 15 | Simulation of fuzzy reliability indexes 显示文摘 | Dong Y G Chen X Z Cho H D | 2003 | KSME (The Korean Society of Mechanical Engineers) International Journal2003，17，4： | 1 |
| 16 | Extension of analytic function expansion nodal method to multi group problems in hexagonal Z geometry显示文摘 | CHO N Z KIM Y H | 1997 | Nucl Sci Eng1997，126，3： | 1 |
| 17 | Augmented control strategies for radiant floor heating systems显示文摘 | Zaheer-uddin M Zhang Z L Cho S H | 2002 | International Journal of Energy Resource2002，26，1： | 1 |
| 18 | Effects of Bacillus subtilis UBTMO2on growth performance,relative immune organ weight,gas concentration in excreta,and intestinal microbial shedding in broiler chickens显示文摘 | Zhang Z F Cho J H Kim I H | 2013 | Livest Sci2013，155，2： | 1 |
| 19 | Microstructure and mechanical properties of super-strong nanocrystalline tungsten processed by high-pressure torsion显示文摘 | WEI Q ZHANG H T SCHUSTER B E RAMESH K T VALIEV R Z KECSKES L J DOWDING R J MAGNESS L CHO K | 2006 | Acta Materialia2006，54，15： | 1 |
| 20 | Teleoperation of a mobile robot using a force-reflection joystick with sensing mechanism of rotating magnetic field 显示文摘 | Cho S K Jin H Z Lee J M | 2010 | IEEE/ASME Transactions on Mechatronics2010，15，1： | 1 |
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