|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 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 | Evaluation of amberlite XAD-4 resin as an extractant for polyethylated material显示文摘 | Nickless | 1978 | J Chromatogr1978，156，： | 1 |
| 3 | EpichloO endophytes grow by intercalary hyphal extension in elongating grass leaves显示文摘 | Christensen M J Bennett R J Ansari H A Koga H Johnson R D Bryan G T Simpson W R Koolaard J P Nickless E M Voisey C R | 2008 | Fungal Genetics and Biology2008，45，2： | 1 |
| 4 | The extraction and recovery of chlorinated insecticides and polychlorinated biphenyls from water using porous polyurethene foams显示文摘 | Nickless G | 1974 | J Chromatogr1974，100，： | 1 |
| 5 | Heterxyclic azo dyestuffs in analytical chemistry(A Review)显示文摘 | Anderson R G Nickless G | 1967 | The Analyst1967，92，： | 1 |
| 6 | Separation of mixed halocarbons of environmental interest on a new type of silicabased porous-layer open tubular capillary gas chromatographic column显示文摘 | Brian R.Greally Graham Nickless Peter G.Simmonds | | 0，，： | 1 |
| 7 | An Automated System for Near-Real-Time Monitoring of Trace Atmospheric Halocarbons显示文摘 | MR Bassford P G Simmonds G Nickless | 1998 | Analytical Chemistry1998，70，5： | 1 |
| 8 | Use of mosses as collectors of airborne heavy metals near a smelting complex 显示文摘 | Cameron A J Nickless G | 1977 | Water Air Soil Poll1977，7，1： | 1 |
| 9 | Concentrations of cadmium, copper, lead, nickel and zinc in the alga Fucus Serratus in the severn estuary from 1971 to 1995 显示文摘 | Martin M H Nickless G Stenner R D | 1997 | Chemosphere1997，34，2： | 1 |
| 10 | Revolutionizing assessment in a clinical skills environment- a global approach: the recorded assessment 显示文摘 | JOY R NICKLESS L J | 2008 | Nurse Educ Pract2008，8，5： | 1 |
| 11 | Use of mosses as collectors of airborne heavy metalnear a smelting complex 显示文摘 | Cameron A J Nickless G | 1977 | Water Air Soil Pollition1977，7，： | 1 |
| 12 | Polymeric coordination compounds the synthesis and applications of selective ion-exchangers and polymeric chelate compounds 显示文摘 | Nickless G Marshall G R | 1964 | Chromatographic Reviews1964，，6： | 1 |
| 13 | Evaluation of ambedite XAD-4 resin as an extractant for polyethylated material显示文摘 | JONES P NICKLESS G | 1978 | J Chromatogr1978，156，： | 1 |
| 14 | Use of msses as collectors of airborne heavy metals near a smelting complex显示文摘 | A. J. Cameron G. Nickless | 1977 | Water Air and Soil Pollution1977，，1： | 1 |
| 15 | ' Use of mosses as collectors of air borne heavy metals near a smelting complex显示文摘 | Cameron A J Nickless G | 1977 | Water Air Soil Pollution1977，7，1： | 1 |
| 16 | The effect of metals on the growth of plants : the use of experimental design and response surfaces in a study of the influence of Tl, Cd, Zn, Fe and Pb on Barley Seedlings 显示文摘 | ALLUS M A BRERETON R G NICKLESS G | 1988 | Chemometrics and Intelligent Laboratory Systems1988，3，： | 1 |
| 17 | Use of mosses as collectors of airborne heavy metals near a smelting complex显示文摘 | Cameron A J Nickless G | 1977 | Water Air and Soil Pollution1977，7，1： | 1 |
| 18 | Separation of hydrohalocar- bons and chlomfluorocarbons using a eyclodextrin gas solid chm- matographyeapiUaryoohmn显示文摘 | Doherty S J O Nickless G Bassford M | 1999 | JournalofChmmatographyA1999，832，： | 1 |
| 19 | Urban tracer dis- persion experiment in London (DAPPLE) 2005: field study and comparison with empirical prediction 显示文摘 | Martin D Nickless G Price C S | 2010 | At- mospheric Science Letters2010，11，4： | 1 |
| 20 | Separation of hydrohalocarbons and chlorofluorocarbons using a cyclodextrin gas solid chromatography capillary column显示文摘 | O'Doherty SJ Nickless G Bassford M | 1999 | J Chromatogr A1999，832，12： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员