Monitoring the production of main agricultural crops is important to predict and prepare for disruptions in food supply and fluctuations in global crop market prices.China’s global crop-monitoring system(CropWatch)us...Monitoring the production of main agricultural crops is important to predict and prepare for disruptions in food supply and fluctuations in global crop market prices.China’s global crop-monitoring system(CropWatch)uses remote sensing data combined with selected field data to determine key crop production indicators:crop acreage,yield and production,crop condition,cropping intensity,crop-planting proportion,total food availability,and the status and severity of droughts.Results are combined to analyze the balance between supply and demand for various food crops and if needed provide early warning about possible food shortages.CropWatch data processing is highly automated and the resulting products provide new kinds of inputs for food security assessments.This paper presents a comprehensive overview of CropWatch as a remote sensingbased system,describing its structure,components,and monitoring approaches.The paper also presents examples of monitoring results and discusses the strengths and limitations of the CropWatch approach,as well as a comparison with other global crop-monitoring systems.展开更多
基金The development of CropWatch and its operation was supported by grants from Major Programs of the Chinese Academy of Sciences during the 9th Five-Year Plan period(KZ951-A1-302-02[19982000])the Key Program of the Chinese Academy of Sciences(KZ95T-03-02[19982000])+4 种基金the Knowledge Innovation Programs of the Chinese Academy of Sciences(KZCX2-313[20002002],KZCX3-SW-338-2[20032007],KSCX1-YW-09-01[20082010])the National Key Technologies Research and Development Program of China during the 10th Five-Year Plan Period(2001BA513B02[20012003])the National High-Tech Research and Development Program of China(2003AA131050[20032005],2012AA12A307[20122014],2013AA12A302[20132015])the National Extension Program for Main Achievements(KJSX0504[20052007])the Conversion Program for Technical Achievements in Agriculture(GQ050006[20052007])by the Ministry of Science and Technology of China.
文摘Monitoring the production of main agricultural crops is important to predict and prepare for disruptions in food supply and fluctuations in global crop market prices.China’s global crop-monitoring system(CropWatch)uses remote sensing data combined with selected field data to determine key crop production indicators:crop acreage,yield and production,crop condition,cropping intensity,crop-planting proportion,total food availability,and the status and severity of droughts.Results are combined to analyze the balance between supply and demand for various food crops and if needed provide early warning about possible food shortages.CropWatch data processing is highly automated and the resulting products provide new kinds of inputs for food security assessments.This paper presents a comprehensive overview of CropWatch as a remote sensingbased system,describing its structure,components,and monitoring approaches.The paper also presents examples of monitoring results and discusses the strengths and limitations of the CropWatch approach,as well as a comparison with other global crop-monitoring systems.
