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Title Page

Contents

ABSTRACT 9

1. INTRODUCTION 11

2. Description of the study area and datasets 21

2.1. Study area 21

2.1.1. Korean peninsula 21

2.1.2. Mongolia 25

2.1.3. Australia 27

2.2. Ground Measurements Datasets 29

2.3. Global Land Datasets 30

2.3.1. Moderate resolution imaging Spectroradiometer (MODIS) 30

2.3.2. Global Land Data Assimilation System (GLDAS) 34

3. Methods 35

3.1. Satellite-based Evapotranspiration Algorithm 35

3.1.1. Modified Remote Sensing-based Penman-Monteith Algorithm 35

3.1.2. Model Improvement under All Sky Condition 42

3.2. Drought Indices 44

3.2.1. Standalone MODIS-based Evaporative Stress Index(stMOD_ESI) 44

3.2.2. Energy-based Water Deficit Index (EWDI) 45

3.2.3. Standardized Precipitation Index (SPI) 47

3.2.4. Palmer Drought Severity Index (PDSI) 48

4. Results and Discussions 49

4.1. Spatio-Temporal Distributions of Various Variables 49

4.1.1. Radiation Energy 49

4.1.2. Carbon Circulation Variables 59

4.1.3. MOD16 Evapotranspiration Product 63

4.1.4. Evapotranspiration 67

4.2. Evaluation of Drought Indices 75

4.2.1. Spatial Distributions of Drought Indices 75

4.2.2. Temporal Distributions of Drought Indices 82

4.2.3. Validation with Other Drought Indices 86

4.2.4. Large-scale Drought Analysis 93

5. Summary and Conclusions 112

References 114

초록 133

List of Tables

Table 1. Site descriptions of the Korean peninsula 23

Table 2. Site descriptions of Mongolia 26

Table 3. Site descriptions of Australia 28

Table 4. Validations of Rld with flux tower measured data 51

Table 5. Statistical comparing observed and estimated GPP 62

Table 6. Statistical comparing observed and estimated MOD16 ET 66

Table 7. Statistical comparing observed and estimated ET 72

Table 8. Drought severity range for wet and dry status of the various drought indices 82

Table 9. Statistical comparison of the drought indices 87

List of Figures

Figure 1. Geographic location of the Korean peninsula and validation sites 22

Figure 2. Geographic locations of Mongolia and validation sites 25

Figure 3. Geographic location of Australia and validation sites 28

Figure 4. Validation results for each Rld model(이미지참조) 54

Figure 5. Spatial distributions of Rld based on Abramowitz's equation(이미지참조) 57

Figure 6. Spatial distribution of GPP in South Korea 60

Figure 7. Time series of observed and estimated GPP 61

Figure 8. Relationship between MODIS-based GPP and fluxtower measurement GPP 62

Figure 9. Spatial distribution of ET in South Korea 64

Figure 10. Time series of observed and estimated ET 65

Figure 11. Relationship between MODIS-based ET and fluxtower measurement GPP 66

Figure 12. Temporal variations of daily estimated ET in 2012 69

Figure 13. Comparison between observed and estimated ET 70

Figure 14. Spatial distribution of monthly estimated ET under all sky condition in 2012 73

Figure 15. Seasonal anomalies in EWDI for 2004-2013 77

Figure 16. Seasonal anomalies of various drought indices 80

Figure 17. Temporal variations of various drought indices for the Uisung region 84

Figure 18. Temporal variations of various drought indices for the Boeun region 84

Figure 19. Temporal variations of various drought indices for the Imsil region 85

Figure 20. Scatterplots among anomaly drought indices for the Uisung region 88

Figure 21. Scatterplots among anomaly drought indices for the Boeun region 89

Figure 22. Scatterplots among anomaly drought indices for the Imsil region 90

Figure 23. Spatial distributions of EWDI and stMOD_ESI for the Korean peninsula in 2010 94

Figure 24. Spatial distributions of EWDI and stMOD_ESI for Australia in 2010 95

Figure 25. Spatial distributions of EWDI and stMOD_ESI for Mongolia in 2010 95

Figure 26. Temporal variations of various drought indices for the Anju site 98

Figure 27. Temporal variations of various drought indices for the Hamheung site 98

Figure 28. Temporal variations of various drought indices for the Kimchaek site 99

Figure 29. Temporal variations of various drought indices for the Perth site 100

Figure 30. Temporal variations of various drought indices for the Melbourne site 101

Figure 31. Temporal variations of various drought indices for the Brisbane site 101

Figure 32. Temporal variations of various drought indices for the Adelaide site 102

Figure 33. Temporal variations of various drought indices for the Darwin site 102

Figure 34. Temporal variations of various drought indices for the Giles site 103

Figure 35. Temporal variations of various drought indices for the Tsetserleg site 104

Figure 36. Temporal variations of various drought indices for the Darkhan site 104

Figure 37. Temporal variations of various drought indices for the Sainshand site 105

Figure 38. Temporal variations of various drought indices for the Khovd site 105

Figure 39. Temporal variations of drought indices for the Dalanzadgad site 106

Figure 40. Temporal variations of various drought indices for the Murun site 106

Figure 41. The results of ROC analysis at the Korean peninsula study sites 107

Figure 42. The results of ROC analysis at the Australia study sites 108

Figure 43. The results of ROC analysis at the Mongolia study sites 109

초록보기

 가뭄은 농업, 경제 및 환경적인 피해를 초래하는 자연 재해 중 하나이다. 광역적인 피해를 주는 가뭄은 시작과 끝을 정확히 알기 어렵고, 진행 방향을 예측하기 힘들기 때문에 이에 대한 피해상황이나 피해대책을 강구하는 것이 쉽지 않다. 최근, 가뭄을 분석하기 위해 새로운 가뭄지수를 개발하거나 기존의 가뭄지수들을 개선하는 연구들이 많이 수행되고 있다. 대부분의 가뭄 연구들은 지상 관측 자료를 활용하여 가뭄현상을 분석하고 있지만 지상 관측 자료를 활용한 가뭄 분석 연구는 지상 관측 망이 조밀하지 않기 때문에 해당 지역을 대표하는 값을 설정하는 데에 한계가 따른다. 이러한 문제를 해결하기 위해 많은 연구들이 정확한 가뭄 상태를 공간적으로 파악할 수 있는 인공위성을 활용한 가뭄 지수 개발에 박차를 가하고 있다.

본 연구에서는 증발산, 토양수분, 태양복사에너지, 식생 활동 등과 같은 수문기상인자들을 활용하여 새로운 가뭄 지수(Energy-based Water Deficit Index(EWDI)를 개발하였고 이는 Moderate Resolution Imaging Spectroradiometer(MODIS)에서 제공되는 산출물들을 활용하였다. EWDI는 물의 순환과 탄소 순환을 동시에 고려하여 기존에 활용되는 다른 가뭄지수들보다 다양한 측면에서 가뭄을 분석할 수 있는 장점을 가지고 있으며 산정된 EWDI는 증발산 기반의 가뭄지수인 Stand-alone MODIS based Evaporative Stress Index(stMOD_ESI)와 함께 시공간적인 변동성을 비교하여 전 세계적으로 가뭄 피해가 심각한 지역인 몽골, 호주, 한반도 지역에 대해 2000년에서 2010년까지 적용성을 파악하였다. 또한, 본 연구에서는 각 지수들 간의 상관관계를 파악하고 수문기상 인자들과 가뭄 현상 사이에 관계성을 파악하기 위해 Receiver Operating Characteristics(ROC) 분석을 수행하였다. 위에서 언급한 여러 분석 결과를 토대로, EWDI와 stMOD_ESI는 기존에 많이 쓰였던 가뭄 지수인 표준강수지수(Standardized Precipitation Index, SPI)에 비해 가뭄 상태를 더욱 잘 파악할 수 있는 것으로 나타났으며 EWDI와 stMOD_ESI가 광역적인 범위에서의 적용성이 높음을 파악하였다. 본 연구를 통해 수문기상학 및 수자원 분야에서의 인공위성을 활용한 가뭄 분석 연구의 기틀이 마련되길 기대해 볼 수 있다.

참고문헌 (162건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 On the information content of surface meteorology for downward atmospheric long‐wave radiation synthesis 네이버 미소장
2 Elevated CO 2 increases water use efficiency by sustaining photosynthesis of water-limited maize and sorghum 네이버 미소장
3 1998. Crop evapotranspiration: Guidelines for computing crop water requirements. United Nations FAO Irrigation and Drainage, Rome. 미소장
4 Satellite-Based Energy Balance for Mapping Evapotranspiration with Internalized Calibration (METRIC)-Model 네이버 미소장
5 A climatological study of evapotranspiration and moisture stress across the continental United States based on thermal remote sensing: 2. Surface moisture climatology 네이버 미소장
6 A climatological study of evapotranspiration and moisture stress across the continental United States based on thermal remote sensing: 2. Surface moisture climatology 네이버 미소장
7 Evaluation of Drought Indices Based on Thermal Remote Sensing of Evapotranspiration over the Continental United States 네이버 미소장
8 An Intercomparison of Drought Indicators Based on Thermal Remote Sensing and NLDAS-2 Simulations with U.S. Drought Monitor Classifications 네이버 미소장
9 Primary Production and Rain Use Efficiency across a Precipitation Gradient on the Mongolia Plateau 네이버 미소장
10 Evaluation of remotely sensed actual evapotranspiration products from COMS and MODIS at two different flux tower sites in Korea 네이버 미소장
11 SEBAL Model with Remotely Sensed Data to Improve Water-Resources Management under Actual Field Conditions 네이버 미소장
12 Estimation and comparison of evapotranspiration from MODIS and AVHRR sensors for clear sky days over the Southern Great Plains 네이버 미소장
13 MODTRAN Cloud and Multiple Scattering Upgrades with Application to AVIRIS 네이버 미소장
14 Estimation of the net radiation using MODIS (Moderate Resolution Imaging Spectroradiometer) data for clear sky days 네이버 미소장
15 2010. Estimation of net radiation from the MODIS data under all sky conditions: Southern Great Plains case study. Remote Sensing of Environment, 114, 1522-1534, doi: 10.1016/j.rse.2010.02.007. 미소장
16 Examination of the Surface Energy Budget: 네이버 미소장
17 Notes on radiation in the atmosphere. I 네이버 미소장
18 On a derivable formula for long‐wave radiation from clear skies 네이버 미소장
19 1982. Evaporation into the Atmosphere: Theory, History, and Applications. D. Reidel, Dordrecht, Holland. 미소장
20 1978. The Environment as Hazard. Oxford University Press: U.K., 240. 미소장
21 Dual-model approaches for evapotranspiration analyses over homo- and heterogeneous land surface conditions 네이버 미소장
22 Remotely Sensed Interannual Variations and Trends in Terrestrial Net Primary Productivity 1981–2000 네이버 미소장
23 Estimation of Root Zone Soil Moisture Using Apparent Thermal Inertia With MODIS Imagery Over a Tropical Catchment in Northern Thailand 네이버 미소장
24 Water content estimation from hyperspectral images and MODIS indexes in Southeastern Arizona 네이버 미소장
25 Remote sensing observatory validation of surface soil moisture using Advanced Microwave Scanning Radiometer E, Common Land Model, and ground based data: Case study in SMEX03 Little River Region, Georgia, U.S. (DOI 10.1029/2006WR005578) 네이버 미소장
26 Assessment of clear and cloudy sky parameterizations for daily downwelling longwave radiation over different land surfaces in Florida, USA (DOI 10.1029/2008GL035731) 네이버 미소장
27 2009. An intercomparison of three remote sensing-based surface energy balance algorithms over a corn and soybean production region (Iowa, U.S.)during SMACEX. Agricultural and Forest Meteorology, 149, 2082-2097. 미소장
28 Evapotranspiration estimation using the Landsat-5 Thematic Mapper image over the Gyungan watershed in Korea 네이버 미소장
29 Evaluation of multiple surface soil moisture for Korean regional flux monitoring network sites: Advanced Microwave Scanning Radiometer E, land surface model, and ground measurements 네이버 미소장
30 A microwave-optical/infrared disaggregation for improving spatial representation of soil moisture using AMSR-E and MODIS products 네이버 미소장
31 Parameterizing daytime downward longwave radiation in two Korean regional flux monitoring network sites 네이버 미소장
32 Evaluation of drought indices via remotely sensed data with hydrological variables 네이버 미소장
33 Comparing global models of terrestrial net primary productivity (NPP): the importance of water availability 네이버 미소장
34 Regional evaporation estimates from flux tower and MODIS satellite data 네이버 미소장
35 2004. Carbon exchange and venting anomalies in an upland deciduous forest in northern Wisconsin, USA. Agricultural and Forest Meteorology, 2004, 126, 271-295. 미소장
36 Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model. 네이버 미소장
37 A Global Dataset of Palmer Drought Severity Index for 1870-2002: Relationship with Soil Moisture and Effects of Surface Warming 네이버 미소장
38 Satellite-based estimates of longwave radiation for agricultural applications 네이버 미소장
39 An evaluation of AMSR–E derived soil moisture over Australia 네이버 미소장
40 2008. Regional mapping of gross light-use efficiency using MODIS spectral indices. Remote Sensing of Environment, 2008, 112, 3064-3078. 미소장
41 Assessing daytime downward longwave radiation estimates for clear and cloudy skies in Southern Brazil 네이버 미소장
42 2007. Estimates of total downwelling surface radiation using a high-resolution GOES-based cloud product along with MODIS and AIRS products. Eos, Transactions AGU 88 Fall Meeting, Abstract H31A-0134. 미소장
43 Global land cover mapping from MODIS: algorithms and early results 네이버 미소장
44 The responses of vegetation water content (EWT) and assessment of drought monitoring along a coastal region using remote sensing 네이버 미소장
45 Integrating Remote Sensing and Ground Methods to Estimate Evapotranspiration 네이버 미소장
46 New drought frequency index: Definition and comparative performance analysis (DOI 10.1029/2005WR004308) 네이버 미소장
47 Forest Carbon Sinks in the Northern Hemisphere 네이버 미소장
48 Remote sensing of contrasting tillage practices in the Texas Panhandle 네이버 미소장
49 COMPARING THE PALMER DROUGHT INDEX AND THE STANDARDIZED PRECIPITATION INDEX 네이버 미소장
50 Downscaling of Land Surface Temperature Maps in the Texas High Plains with the TsHARP Method 네이버 미소장
51 2003. User’s guide: GPP and NPP (MOD17A2/A3) products, NASA MODIS LandAlgorithm. http://www.forestry.umt.edu/ntsg/2003. 미소장
52 Standardization of KoFlux Eddy-Covariance Data Processing 소장
53 Overview of the radiometric and biophysical performance of the MODIS vegetation indices 네이버 미소장
54 Amazon rainforests green-up with sunlight in dry season (DOI 10.1029/2005GL025583) 네이버 미소장
55 A comparison of vegetation indices over a global set of TM images for EOS-MODIS 네이버 미소장
56 Convergence across biomes to a common rain-use efficiency 네이버 미소장
57 Seasonal trends of satellite-based evapotranspiration algorithms over a complex ecosystem in East Asia 네이버 미소장
58 Estimation of instantaneous and daily net radiation from MODIS data under clear sky conditions: a case study in East Asia 네이버 미소장
59 Evaluating drought effect on MODIS Gross Primary Production (GPP) with an eco‐hydrological model in the mountainous forest, East Asia 네이버 미소장
60 Thermal radiation from the atmosphere 네이버 미소장
61 IPCC report, Climate change: Synthesis report, 2007. 미소장
62 Evaluation of shortwave irradiance and evapotranspiration derived from moderate resolution imaging spectroradiometer (MODIS) 소장
63 Mapping evapotranspiration using MODIS and MM5 Four-Dimensional Data Assimilation 네이버 미소장
64 Monitoring daily evapotranspiration in Northeast Asia using MODIS and a regional Land Data Assimilation System 네이버 미소장
65 Evapotranspiration and water use efficiency in different-aged Pacific Northwest Douglas-fir stands 네이버 미소장
66 Consistency of MODIS surface bidirectional reflectance distribution function and albedo retrievals: 2. Validation 네이버 미소장
67 Continental-scale net radiation and evapotranspiration estimated using MODIS satellite observations 네이버 미소장
68 2011. The effects of drought and timing of precipitation on the inter-annual variation in ecosystematmosphere exchange in a Mediterranean grassland. Agricultural and Forest Meteorology, 151, 595-606. 미소장
69 Droughts 네이버 미소장
70 Estimating Land Surface Evaporation: A Review of Methods Using Remotely Sensed Surface Temperature Data 네이버 미소장
71 Errors of MODIS product of Gross Primary Production by using Data Assimilation Office Meteorological Data 소장
72 A regional phenology model for detecting onset of greenness in temperate mixed forests, Korea: an application of MODIS leaf area index 네이버 미소장
73 Drought monitoring using a Soil Wetness Deficit Index (SWDI) derived from MODIS satellite data 네이버 미소장
74 Tools for atmospheric radiative transfer: Streamer and FluxNet 네이버 미소장
75 An aggregate drought index: Assessing drought severity based on fluctuations in the hydrologic cycle and surface water storage (DOI 10.1029/2003WR002610) 네이버 미소장
76 Validation of MODIS 16 global terrestrial evapotranspiration products in various climates and land cover types in Asia 소장
77 HydroKorea and CarboKorea : cross-scale studies of ecohydrology and biogeochemistry in a heterogeneous and complex forest catchment of Korea 네이버 미소장
78 Enhancing the reliability of MODIS gross primary productivity (GPP) by improving input data 소장
79 Comparison of models for calculating daytime long-wave irradiance using long term data set 네이버 미소장
80 Atmospheric Transmittance/Radiance: Computer Code LOWTRAN 6. Supplement: Program Listings 네이버 미소장
81 Global Drought Watch from Space 네이버 미소장
82 Downward longwave radiation estimates for clear and all-sky conditions in the Sertãozinho region of São Paulo, Brazil 네이버 미소장
83 A two-source approach for estimating turbulent fluxes using multiple angle thermal infrared observations 네이버 미소장
84 Error assessment of climate variables for FAO-56 reference evapotranspiration 네이버 미소장
85 Quality Control and Assurance of Eddy Covariance Data at the Two KoFlux Sites 소장
86 Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation 네이버 미소장
87 Effects of climate change on the thermal structure of lakes in the Asian Monsoon Area 네이버 미소장
88 Satellite‐based actual evapotranspiration estimation in the middle reach of the Heihe River Basin using the SEBAL method 네이버 미소장
89 A review of current methodologies for regional evapotranspiration estimation from remotely sensed data. 네이버 미소장
90 Forest Stand Structure, Site Characteristics and Carbon Budget of the Kwangneung Natural Forest in Korea 소장
91 Estimating Longwave Net Radiation at Sea Surface from the Special Sensor Microwave/Imager (SSM/I) 네이버 미소장
92 An algorithm for the retrieval of albedo from space using semiempirical BRDF models 네이버 미소장
93 Flux Sampling Errors for Aircraft and Towers 네이버 미소장
94 2005. Drought Detection and Quantification using Field-Based Spectral Measurements of Vegetation in Semi-Arid Regions. New Mexico Institute of Mining and Technology Department of Earth and Environmental Science (M.S Thesis). 미소장
95 2002. Integrating remotely sensed data with an ecosystem model to estimate net primary productivity in East Asia. Remote Sensing of Environment, 81, 58-66. 미소장
96 Enhanced absorption of UV radiation due to multiple scattering in clouds: Experimental evidence and theoretical explanation 네이버 미소장
97 2006. Cameron, D.A. Carbon dioxide and energy fluxes from a boreal mixed wood forest ecosystems in Ontario, Canada. Agricultural and Forest Meteorology, 140, 79-96. 미소장
98 1993. The relationship of drought frequency and duration to time scales. In Preprints of the 8th Conference on Applied Climatology, January 17-22, Anaheim, CA, 179-184. 미소장
99 A Groundwater Resource Index (GRI) for drought monitoring and forecasting in a mediterranean climate 네이버 미소장
100 2002. MODIS atmospheric profile retrieval algorithm theoretical basis document (MOD07). University of Winconsin-Madison Press: Madison, 39 pp. 미소장
101 A regional analysis of event runoff coefficients with respect to climate and catchment characteristics in Austria (DOI 10.1029/2008WR007163) 네이버 미소장
102 Use of atmospheric radiation measurement program data from Barrow, Alaska, for evaluation and development of snow-albedo parameterizations 네이버 미소장
103 Evaporation and environment. 네이버 미소장
104 1973. Principles of environmental physics. Edward Arnold, London. 미소장
105 CO₂and Energy Exchange in a Rice Paddy for the Growing Season of 2002 in Hari, Korea 소장
106 Eddy flux measurements above a pine forest 네이버 미소장
107 Chapter 8: Rural African American Older Adults and the Black Helping Tradition 네이버 미소장
108 Monitoring global vegetation using moderate-resolution satellites 네이버 미소장
109 Development of a global evapotranspiration algorithm based on MODIS and global meteorology data 네이버 미소장
110 Evolution of hydrological and carbon cycles under a changing climate. Part III: global change impacts on landscape scale evapotranspiration 네이버 미소장
111 A REMOTELY SENSED GLOBAL TERRESTRIAL DROUGHT SEVERITY INDEX 네이버 미소장
112 Global products of vegetation leaf area and fraction absorbed PAR from year one of MODIS data 네이버 미소장
113 Annual and Seasonal Variations of the Sea Surface Heat Fluxes in the East Asian Marginal Seas 네이버 미소장
114 Climate-Driven Increases in Global Terrestrial Net Primary Production from 1982 to 1999 네이버 미소장
115 Comparison of surface radiative flux parameterizations 네이버 미소장
116 Soil moisture retrieval from AMSR-E 네이버 미소장
117 Flash flood warning based on rainfall thresholds and soil moisture conditions: An assessment for gauged and ungauged basins 네이버 미소장
118 Source approach for estimating soil and vegetation energy fluxes in observations of directional radiometric surface temperature 네이버 미소장
119 1965. Meteorological Drought. Research Paper No. 45. US Weather Bureau: Washington, DC, 58. 미소장
120 Natural Evaporation from Open Water, Bare Soil and Grass 네이버 미소장
121 Variability in Light-Use Efficiency for Gross Primary Productivity on Great Plains Grasslands 네이버 미소장
122 Comparison of ecosystem water‐use efficiency among Douglas‐fir forest, aspen forest and grassland using eddy covariance and carbon isotope techniques 네이버 미소장
123 A new long‐wave formula for estimating downward clear‐sky radiation at the surface 네이버 미소장
124 On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters 네이버 미소장
125 Tower and Aircraft Eddy Covariance Measurements of Water Vapor, Energy, and Carbon Dioxide Fluxes during SMACEX 네이버 미소장
126 2000. S-SEBI: A simple remote sensing algorithm to estimate the surface energy balance. Physics and Chemistry of the Earth, Part B: Hydrology. Oceans and Atmosphere, 25, 147-157. 미소장
127 An Intercomparison of ERS-Scat and AMSR-E Soil Moisture Observations with Model Simulations over France 네이버 미소장
128 2000. Global Terrestrial Gross and Net Primary Productivity from the Earth Observing System. Methods in Ecosystem Science, 44-57. 미소장
129 Evaluation of land surface radiation balance derived from moderate resolution imaging spectroradiometer (MODIS) over complex terrain and heterogeneous landscape on clear sky days 네이버 미소장
130 On the temporal upscaling of evapotranspiration from instantaneous remote sensing measurements to 8-day mean daily-sums 네이버 미소장
131 Estimating daily gross primary production of maize based only on MODIS WDRVI and shortwave radiation data 네이버 미소장
132 Validation of the MODIS bidirectional reflectance distribution function and albedo retrievals using combined observations from the aqua and terra platforms 네이버 미소장
133 An improved equation for estimating long‐wave radiation from the atmosphere 네이버 미소장
134 2002. First operational BRDF, Albedo and Nadir Reflectance Products from MODIS. Remote Sensing of Environment, 83, 135-148. 미소장
135 Operational retrieval of atmospheric temperature, moisture, and ozone from MODIS infrared radiances 네이버 미소장
136 Spatial and Temporal Variability of Net Primary Productivity (NPP) over Terrestrial Biosphere of India Using NOAA-AVHRR Based GloPEM Model 네이버 미소장
137 On the development of a simple downwelling longwave radiation scheme 네이버 미소장
138 Utility of Penman–Monteith, Priestley–Taylor, reference evapotranspiration, and pan evaporation methods to estimate pasture evapotranspiration 네이버 미소장
139 Evaluating Ecohydrological Impacts of Vegetation Activities on Climatological Perspectives Using MODIS Gross Primary Productivity and Evapotranspiration Products at Korean Regional Flux Network Site 네이버 미소장
140 Long-wave radiation from clear skies 네이버 미소장
141 Estimation of instantaneous net surface longwave radiation from MODIS cloud-free data 네이버 미소장
142 An Approach toward a Rational Classification of Climate 네이버 미소장
143 Model estimates of net primary productivity, evapotranspiration, and water use efficiency in the terrestrial ecosystems of the southern United States during 1895–2007 네이버 미소장
144 Regional Drought Assessment Based on the Reconnaissance Drought Index (RDI) 네이버 미소장
145 Validating modelled NPP using statistical yield data 네이버 미소장
146 Correcting eddy-covariance flux underestimates over a grassland 네이버 미소장
147 2006. Soil Moisture Retrieval Using Thermal Inertia, Determined with Visible and Thermal Spaceborne Data, Validated for European Forests. Remote Sensing of Environment, 101, 299-314. 미소장
148 The ASCAT Soil Moisture Product: A Review of its Specifications, Validation Results, and Emerging Applications 네이버 미소장
149 Estimation of high-spatial resolution clear-sky longwave downward and net radiation over land surfaces from MODIS data 네이버 미소장
150 Primary Productivity and Water Use in Native Forest, Grassland, and Desert Ecosystems 네이버 미소장
151 A Self-Calibrating Palmer Drought Severity Index 네이버 미소장
152 1993. Drought Assessment, Management, and Planning: Theory and Case Studies. Natural Resource Management and Policy Series, Vol. 2, Kluwer, 293. 미소장
153 Understanding: the Drought Phenomenon: The Role of Definitions 네이버 미소장
154 Satellite-based modeling of gross primary production in an evergreen needleleaf forest 네이버 미소장
155 Prediction of Continental-Scale Evapotranspiration by Combining MODIS and AmeriFlux Data Through Support Vector Machine 네이버 미소장
156 On downward shortwave and longwave radiations over high altitude regions: Observation and modeling in the Tibetan Plateau 네이버 미소장
157 Monitoring Drought over the Conterminous United States Using MODIS and NCEP Reanalysis-2 Data 네이버 미소장
158 Water‐use efficiency of forest ecosystems in eastern China and its relations to climatic variables 네이버 미소장
159 Global estimates of evapotranspiration and gross primary production based on MODIS and global meteorology data 네이버 미소장
160 2012. Spatial and temporal variation of precipitation in Sudan and their possible cause during 1948-2005. Stochastic Environmental Research and Risk Assessment, 26, 429-441. 미소장
161 Improvements of the MODIS terrestrial gross and net primary production global data set 네이버 미소장
162 Drought-Induced Reduction in Global Terrestrial Net Primary Production from 2000 Through 2009 네이버 미소장

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