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Agricultural, Water, and Health-Related Satellite Products from NESDIS-STAR Felix Kogan NOAA/NESDIS Center for Satellite Applications and Research October 2010
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2 AVHRR Data for Land Use Sensor: Advanced Very High Resolution Radiometer (AVHRR) Satellites:NOAA-7, 9, 11, 14, 16, 17 (morn.), 18, 19 Data Resolution: Spatial - 4 km (GAC), 8 & 16 km ; Temporal - 7-day composite Period: 30-year(1981-2010) Coverage: World (75 N to 55 S) Channels: VIS (ch1), NIR (ch2), Thermal (ch4, ch5)
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3 THEORY Vegetation vs. VIS & NIR reflectance
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4 THEORY Crops’ Reflectance (Citrus, Tomatoes, Sorghum, Cotton) VIS reflectance depends on CHLOROPHYLL CAROTENOID NIR reflectance depends on WATER CONTENT CELL STRUCTURE
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5 NDVI & Reflectance Cover TypeCh1Ch2NDVI Vegetation: Dense.050.1500.500 Medium.080.1100.140 Light.100.1200.090 Bare Soil.269.2830.025 Clouds.227.2280.002 Water.022.013-0.26 NDVI= (Ch2-Ch1)/(Ch2+Ch1)
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6 NDVI & Smoothed NDVI Eliminate high frequency noise Emphasize seasonal cycle Separate medium & low frequency variations
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7 NDVI & Rainfall (% mean), SUDAN 95% 115% 73% 51%
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8 NDVI & BT by Ecosystem Type Central USA
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9 AVHRR PRODUCTS Vegetation condition index (VCI), values 0 - 100 VCI=(NDVI-NDVImin)/(NDVImax-NDVImin) NDVImax, and NDVImin – climatology (1981-2000 maximum and minimum NDVI for a pixel; Temperature condition index (TCI), values 0 - 100 TCI=(BTmax-BTmin)/(BTmax-BTmin) NDVImax, and NDVImin – climatology (1981-2000 maximum and minimum NDVI for a pixel Vegetation Health Index (VHI), values 0 – 100 VHI=a*VCI+(1-a)*TCI 0 – indicates extreme stress 100 – indicates favorable conditions MOISTURE THERMAL VEG. HEALTH
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NDVI & Vegetation Health (VH) 10 NDVI VH
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11 Drought 1988, USA June 28 Severe Moisture and Thermal Vegetation Stress
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12 Drought 1988, Week 27, Satellite & In Situ Data
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13 Vegetation Condition Index (VCI), USSR southeast
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14 Wheat Density vs VCI 1991 1992 May Jun Jul Aug Sep
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Sep 30, 2010: VCI vs Soil Moisture UKRAINE 15 VCI 0-20 cm Soil Moisture Anomaly
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16 VHI and Biomass, Mongolia 1988 1989
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17 Corn Yield vs VCI Midwest, USA Corn Yield - normalized for Midwestern CRD VCI – mean for CRD
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18 VH and Crop Yield MOROCCO -Wheat MONGOLIA - Pasture RUSSIARUSSIA ARGENTINAARGENTINA Kansas, USA
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19 Correlation of Wheat Yield anomaly with VH Indices, Precipitation & Temperature anomaly Saratov, RUSSIA dY vs VHI, VCI & TCI dY vs dP dY vs dT Yield
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dY vs VCI Correlation, KANSAS P S H H P HH
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Modeling Agricultural Production KANSAS, USA
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22 Vegetation Health and Agriculture, UKRAINE 2003 – Intensive Drought (red) caused 35% losses in grain yield (1.84 t/ha) versus the years before and after 2002 & 2004 – NOAA-16 satellite identify good vegetation health (green) resulted in high yield 2.75 & 2.84 t/ha ADDRESS: - Ecosystem Health - Agriculture - Food Security PLAN Use NOAA/AVHRR Data 4 km resolution 2.7 1.8 2.8 t/ha
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2007 Drought Dynamics: Focus on Southern RUSSIA & UKRAINE from NOAA-18 Vegetation Health Index (VHI) -Vegetation Health (red) deteriorated from April through the end of the growing season, especially in the main areas of winter wheat -VHI is derived from NOAA/AVHRR data and estimates greenness, vigor and thermal conditions of vegetation UKRAINE Russia Turkey Rumania Beloruss BulgariaGeorgia SyriaIraq
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www.rsindexbasedcropinsurance2010.com 24 JUNE
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Vegetation Condition 2010 25
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Vegetation Health Dynamics, USA DROUGHT DETECTION (DD)
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27 DD: Drought Dynamics from Vegetation Health Index Drought No Drought 1999 2000
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DD: 2007 Vegetation Health, Odessa obl., UKRAINE 28 DROUGHT Healthy Moisture Thermal
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Drought Area & Intensity (DAI) Severe-to-Exceptional Drought (% from the World area), 2000-2010 29
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30 DAI: Estimated from AVHRR-based Vegetation Health Index No Data
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DAI: UKRAINE, All MAX 10% 20% 50% 80%
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Extreme Drought Area, 1991-2009
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Vegetation stress, June, 2008 DROUHGT-red Soil Saturation- white
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Soil Saturation Index (SSI) June 8-27, 2008, Midwest, USA June 8-14 June 15-21 June 22-27
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Area (% from a state) of saturated and flooded soil Midwestern states, USA, 2008 Week MAY JUNE % 1 15 31 1 15
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36 Web http://www.orbit.nesdis.noaa.gov /smcd/emb/vci
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Vegetation Health October 21, 2010 37
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Vegetation Health October 21 38
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Drought & Fire Risk October 21, 2010 39 Drought Fire Risk
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Percent drought area in the major corn belt of BRAZIL 40
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Oct 21, 2010 VH Change from Oct 14, 2010 (A) & Oct 21, 2009 (B) 41
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Drought change on Oct 21, 2010 42
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Wheat Yield RUSSIA Russia produces 65% WW & 35% SW Figure shows dynamics of Vegetation health (VH) 2007 WW analogue was 2001 VH WW yield is expected at or 1-3% below LTT or 1.9 t/ha Figure shows dynamics of Vegetation health (VH) 2007 SW analogue was 2001 VH SW yield is expected 5-7% above long-term trend (LTT) Total wheat is expected at or slightly below LTT (1.96 t/ha)
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Mean Moisture (VCI) & Thermal (TCI) conditions for the major crop growing area of BRAZIL, 2010 44
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Vegetation Health, Soybeans area, BRAZIL 45
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VCI & TCI Dynamics Soybeans area 2010 vs 2008, BRAZIL 46
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PROBLEMS? 47
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NDVI 2010 week 40 GVI-x N18 MGVI N19 Difference
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BT4 2010 week 40 MGVI N18 MGVI N19 Difference
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