GridMET is a gridded meteorological dataset of multiple climate variables on a daily time scale across the United States. It is a hybrid of the National Land Data Assimilation System (NLDAS) (Mitchell et al., 2004) and the Parameter‐Elevation Regressions on Independent Slopes Model (PRISM) datasets (Daly, 2006).
ASCE Grass Reference Evapotranspiration (ETo): Penman-Monteith reference ET based on a grass reference crop defined by American Society of Civil Engineers (Allen et al., 2005)
ASCE Alfalfa Reference Evapotranspiration (ETr): Penman Monteith reference ET based on a alfalfa reference crop defined by American Society of Civil Engineers (Allen et al., 2005)
Precipitation (PPT): Daily precipitation
Potential Water Deficit (PPT-ETo): Difference between total precipitation and total ETo over specified time interval
Min Rel. Humidity: Daily minimum relative humidity (%)
Max Rel. Humidity: Daily maximum relative humidity (%)
Specific Humidity: The ratio of the mass of water vapor to the total mass of air for a unit volume (kg/kg)
Downward Shortwave Radiation: At surface daily average shortwave radiation (W/m^2)
Mean Temperature: Mean daily temperature
Min Temperature: Minimum daily temperature
Max Temperature: Maximum daily temperature
Vapor Pressure Deficit: Mean daily vapor pressure deficit (kPa)
Wind Speed: Mean daily wind speed at 2m height
Burning Index: Measure of fire intensity and related to the effort of containing a fire (NFDRS)
Energy Release Component (ERC): Index of large fire potential and component of the United States Forest Service National Fire Danger Rating System (Deeming et al.,1978)
100-HR Dead Fuel Moisture (FM-100): Moisture level of dead fuels within the 1-3 inch diameter class (%)
1000-HR Dead Fuel Moisture (FM-1000): Moisture level of dead fuels within the 3-8 inch diameter class (%)
Palmer Drought Severity Index (PDSI): A ~9 month timescale drought index based on precipitation and ASCE grass reference evapotranspiration (ETo) (Palmer 1965)
Evap. Demand Drought Index (EDDI): A multi-timescale drought index based on evaporative demand of the atmosphere (Hobbins et al., 2016; McEvoy et al., 2016)
Standard Precipitation Index (SPI): A multi-timescale drought drought index based on precipitation (McKee 1993)
Standard Precipitation Evaporation Index (SPEI): A multi-timescale drought index based on precipitation minus ASCE grass reference evapotranspiration (ETo) (Vicente-Serrano 2010)
Period of Record
Abatzoglou, J. T. (2013). Development of gridded surface meteorological data for ecological applications and modelling. International Journal of Climatology, 33(1), 121-131.
Allen, T. G., I. A. Walter, R. Elliot, and T. A. Howell (2005), ASCE-EWRI Standardization of Reference Evapotranspiration, Am. Soc. Civ. Eng. Water Int.
Daly, C., Halbleib, M., Smith, J.I., Gibson, W.P., Doggett, M.K., Taylor, G.H., Curtis, J., and Pasteris, P.A. 2008. Physiographically-sensitive mapping of temperature and precipitation across the conterminous United States. International Journal of Climatology, 28: 2031-2064
Deeming JE, Burgan RE, Cohen JD. 1978. The National Fire‐Danger Rating System—1978. Revisions to the 1978 National Fire‐Danger Rating System. General Technical Report INT‐39. Ogden, UT: US Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station; 63.
Hobbins, M. T., Wood, A., McEvoy, D. J., Huntington, J. L., Morton, C., Anderson, M., & Hain, C. (2016). The evaporative demand drought index. Part I: Linking drought evolution to variations in evaporative demand. Journal of Hydrometeorology, 17(6), 1745-1761.
McEvoy, D. J., Huntington, J. L., Hobbins, M. T., Wood, A., Morton, C., Anderson, M., & Hain, C. (2016). The evaporative demand drought index. Part II: CONUS-wide assessment against common drought indicators. Journal of Hydrometeorology, 17(6), 1763-1779.
McKee, T. B., N. J. Doesken, and J. Kliest, 1993: The relationship of drought frequency and duration to time scales. In Proceedings of the 8th Conference of Applied Climatology, 17-22 January, Anaheim, CA. American Meteorological Society, Boston, MA. 179-184.
Mitchell, K.E., Lohmann, D., Houser, P.R., Wood, E.F., Schaake, J.C., Robock, A., et al. (2004). The multi-institution North American Land Data Assimilation System (NLDAS): Utilizing multiple GCIP products and partners in a continental distributed hydrological modeling system. Journal of Geophysical Research D: Atmospheres, 109, 1–32. https://doi.org/10.1029/2003jd003823
NFDRS System Inputs and Outputs (Accessed 8/6/2020) https://www.nwcg.gov/publications/pms437/fire-danger/nfdrs-system-inputs-outputs#:~:text=The%20Burning%20Index%20is%20a,in%20feet%20multiplied%20by%20ten.
Palmer, W. C. (1965). Meteorological drought (Vol. 30). US Department of Commerce, Weather Bureau. https://www.ncdc.noaa.gov/temp-and-precip/drought/docs/palmer.pdf
Vicente-Serrano S.M., Santiago Beguería, Juan I. López-Moreno, (2010) A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696-1718.
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