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The global long-term microwave Vegetation Optical Depth Climate Archive (VODCA)
Since the late 1970s, space-borne microwave radiometers have been providing measurements of radiation emitted by the Earth's surface. From these measurements it is possible to derive vegetation optical depth (VOD), a model-based indicator related to the density, biomass, and water content of ve...
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Published in: | Earth system science data 2020-01, Vol.12 (1), p.177-196 |
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description | Since the late 1970s, space-borne microwave radiometers have been providing measurements of radiation emitted by the Earth's surface. From these measurements it is possible to derive vegetation optical depth (VOD), a model-based indicator related to the density, biomass, and water content of vegetation. Because of its high temporal resolution and long availability, VOD can be used to monitor short- to long-term changes in vegetation. However, studying long-term VOD dynamics is generally hampered by the relatively short time span covered by the individual microwave sensors. This can potentially be overcome by merging multiple VOD products into a single climate data record. However, combining multiple sensors into a single product is challenging as systematic differences between input products like biases, different temporal and spatial resolutions, and coverage need to be overcome. |
doi_str_mv | 10.5194/essd-12-177-2020 |
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From these measurements it is possible to derive vegetation optical depth (VOD), a model-based indicator related to the density, biomass, and water content of vegetation. Because of its high temporal resolution and long availability, VOD can be used to monitor short- to long-term changes in vegetation. However, studying long-term VOD dynamics is generally hampered by the relatively short time span covered by the individual microwave sensors. This can potentially be overcome by merging multiple VOD products into a single climate data record. However, combining multiple sensors into a single product is challenging as systematic differences between input products like biases, different temporal and spatial resolutions, and coverage need to be overcome.</description><identifier>ISSN: 1866-3516</identifier><identifier>ISSN: 1866-3508</identifier><identifier>EISSN: 1866-3516</identifier><identifier>DOI: 10.5194/essd-12-177-2020</identifier><language>eng</language><publisher>Katlenburg-Lindau: Copernicus GmbH</publisher><subject>Advanced Very High Resolution Radiometer ; Anomalies ; Archives & records ; Autocorrelation ; C band ; Climate ; Climate and vegetation ; Climatic data ; Cloud cover ; Consistency ; Datasets ; Distribution functions ; Earth ; Earth surface ; Ecological monitoring ; Ecosystems ; Environmental changes ; Instruments ; Interpolation ; Leaf area ; Leaf area index ; Leaves ; Long-term changes ; Matching ; Microwave imagery ; Microwave radiometers ; Microwave sensors ; Moisture content ; Optical analysis ; Optical thickness ; Outliers (statistics) ; Plant cover ; Products ; Radiation ; Radiation measurement ; Radiometers ; Random errors ; Scaling ; Sensors ; Soil ; Soil moisture ; Soil surfaces ; Special Sensor Microwave Imager ; Spectral bands ; Structural members ; Superhigh frequencies ; Tropical environments ; Vegetation ; Video-on-demand ; Water content ; Water depth</subject><ispartof>Earth system science data, 2020-01, Vol.12 (1), p.177-196</ispartof><rights>COPYRIGHT 2020 Copernicus GmbH</rights><rights>2020. 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From these measurements it is possible to derive vegetation optical depth (VOD), a model-based indicator related to the density, biomass, and water content of vegetation. Because of its high temporal resolution and long availability, VOD can be used to monitor short- to long-term changes in vegetation. However, studying long-term VOD dynamics is generally hampered by the relatively short time span covered by the individual microwave sensors. This can potentially be overcome by merging multiple VOD products into a single climate data record. However, combining multiple sensors into a single product is challenging as systematic differences between input products like biases, different temporal and spatial resolutions, and coverage need to be overcome.</description><subject>Advanced Very High Resolution Radiometer</subject><subject>Anomalies</subject><subject>Archives & records</subject><subject>Autocorrelation</subject><subject>C band</subject><subject>Climate</subject><subject>Climate and vegetation</subject><subject>Climatic data</subject><subject>Cloud cover</subject><subject>Consistency</subject><subject>Datasets</subject><subject>Distribution functions</subject><subject>Earth</subject><subject>Earth surface</subject><subject>Ecological monitoring</subject><subject>Ecosystems</subject><subject>Environmental changes</subject><subject>Instruments</subject><subject>Interpolation</subject><subject>Leaf area</subject><subject>Leaf area index</subject><subject>Leaves</subject><subject>Long-term 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From these measurements it is possible to derive vegetation optical depth (VOD), a model-based indicator related to the density, biomass, and water content of vegetation. Because of its high temporal resolution and long availability, VOD can be used to monitor short- to long-term changes in vegetation. However, studying long-term VOD dynamics is generally hampered by the relatively short time span covered by the individual microwave sensors. This can potentially be overcome by merging multiple VOD products into a single climate data record. 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subjects | Advanced Very High Resolution Radiometer Anomalies Archives & records Autocorrelation C band Climate Climate and vegetation Climatic data Cloud cover Consistency Datasets Distribution functions Earth Earth surface Ecological monitoring Ecosystems Environmental changes Instruments Interpolation Leaf area Leaf area index Leaves Long-term changes Matching Microwave imagery Microwave radiometers Microwave sensors Moisture content Optical analysis Optical thickness Outliers (statistics) Plant cover Products Radiation Radiation measurement Radiometers Random errors Scaling Sensors Soil Soil moisture Soil surfaces Special Sensor Microwave Imager Spectral bands Structural members Superhigh frequencies Tropical environments Vegetation Video-on-demand Water content Water depth |
title | The global long-term microwave Vegetation Optical Depth Climate Archive (VODCA) |
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