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What are the temporal and spatial resolution of AgMERRA?

The AgMERRA and AgCFSR climate forcing datasets were created as an element of the Agricultural Model Intercomparison and Improvement Project (AgMIP) to provide consistent, daily time series over the 1980-2010 period with global coverage of climate variables required for agricultural models. These datasets were designed to be useful for AgMIP's coordinated, protocol-based studies of agricultural impacts ranging from biophysical process studies to global agricultural economic models (Rosenzweig et al., 2013). The spatial resolution of AgMERRA divide to three different scales, namely 0.25 degree, 0.5 degree, and 1 degree for seven different weather variables. Mean, maximum, and minimum temperatures (degree Celsius) are in 0.5 degree. The values of precipitation (mm) are in 0.25 degree. The amount of solar radiation (MJ/m2/day) are in 1 degree. The values Relative Humidity at Time of Max Temp (%) are in 0.25 degree. The last weather variable is wind speed (m/s) that the spatial resolution of this variable in AgMERRA is equal to 0.25 degree. There is a complete table in the https://data.giss.nasa.gov/impacts/agmipcf/ that you can find further information about these resolutions. The temporal resolution of AgMERRA is daily scale. The seven variables are available in daily scale over 1980-2010. AgMERRA and AgCFSR were created to be used explicitly for research purposes with uses for impacts analysis and scenario generation, but it is important to recognize that they do not represent a climate observational record. These datasets may not be suitable for other applications, including including, but not limited to, detailed trend analysis or energy and water budget evaluation because they blend datasets and rely on reanalyses with changing inputs between 1980 and 2010. Rosenzweig, C., et al., 2013:

The Agricultural Model Intercomparison and Improvement Project (AgMIP): Protocols and pilot studies, Agr. Forest Meteorol., 170, 166-182, doi:dx.doi.org/10.1016/j.agrformet.2012.09.011.

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