Publications by authors named "Andrew Hoell"
Article Synopsis
- Early warning systems for crop failures need to predict yields 6 to 12 months in advance, but such forecasts are currently limited.
- Recent advancements in climate forecasting have shown that it is possible to create skillful preseason crop yield forecasts for major crops like maize and wheat.
- These skillful forecasts can cover significant areas globally, especially in regions like Southeast Africa and Southeast Asia for maize, and parts of Asia, Australia, and South America for wheat, with some forecasts accurate over 18 months prior to harvest.
NOAA has developed a global reference evapotranspiration (ET) reanalysis using the UN Food and Agriculture Organization formulation (FAO-56) of the Penman-Monteith equation forced by MERRA phase 2 (MERRA2) meteorological and radiative drivers. The NOAA ET reanalysis is provided daily from January 1, 1980 to the near-present at a resolution of 0.5° latitude × 0.
View Article and Find Full Text PDFThe Climate Hazards group Infrared Precipitation with Stations (CHIRPS) dataset builds on previous approaches to 'smart' interpolation techniques and high resolution, long period of record precipitation estimates based on infrared Cold Cloud Duration (CCD) observations. The algorithm i) is built around a 0.05° climatology that incorporates satellite information to represent sparsely gauged locations, ii) incorporates daily, pentadal, and monthly 1981-present 0.
View Article and Find Full Text PDFSince 1980, the number of undernourished people in eastern and southern Africa has more than doubled. Rural development stalled and rural poverty expanded during the 1990s. Population growth remains very high, and declining per-capita agricultural capacity retards progress toward Millennium Development goals.
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