netcdf files/d569728/ALL/SMM_CCI_0.25.nc {
  dimensions:
    lon = 1440;
    lat = 184;
  variables:
    float lon(lon=1440);
      :_FillValue = NaNf; // float
      :long_name = "longitude";
      :standard_name = "longitude";
      :units = "degrees_east";
      :axis = "X";

    float lat(lat=184);
      :_FillValue = NaNf; // float
      :long_name = "latitude";
      :standard_name = "latitude";
      :units = "degrees_north";
      :axis = "Y";

    double SMM(lat=184, lon=1440);
      :_FillValue = NaN; // double
      :long_name = "Random error adjusted soil moisture memory for all months over the tropics (23°S–23°N)";
      :unit = "days";
      :valid_min = 0.0; // double
      :valid_max = 365.0; // double
      :_ChunkSizes = 184U, 1440U; // uint

    double delta_sigma(lat=184, lon=1440);
      :long_name = "Relative measurement error= SD(SM random error)/SD(SM) for all months over the tropics (23°S–23°N)";
      :_FillValue = NaN; // double
      :units = "Dimensionless";
      :_ChunkSizes = 184U, 1440U; // uint

    float sigma2(lat=184, lon=1440);
      :_FillValue = NaNf; // float
      :long_name = "Variance of observed SM for all months over the tropics (23°S–23°N)";
      :units = "1";
      :_ChunkSizes = 184U, 1440U; // uint

    double delta2(lat=184, lon=1440);
      :_FillValue = NaN; // double
      :long_name = "Variance of observed SM random error for all months over the tropics (23°S–23°N)";
      :units = "1";
      :_ChunkSizes = 184U, 1440U; // uint

  // global attributes:
  :Institution = "George Mason University, Virginia, USA";
  :Contact = "Nazanin Tavakoli (ntavakol@gmu.edu), Paul A Dirmeyer (pdirmeye@gmu.edu)";
  :Description = "Random error adjusted soil moisture memory (SMM), the relative measurement error (δ/σ), variance of the observed SM random error (δ**2), and variance of the observed SM (σ**2) derived from the Climate Change Initiative (CCI) covering all months from 1979 to 2023 across the tropics (23°S–23°N).";
  :Reference = "Tavakoli and Dirmeyer";
  :Creation_date = "2025";
  :Title = "A Global Dataset of Land–Atmosphere Coupling Metrics Based on Observations for Evaluating Earth System Models";
  :Version = "1.0";
  :Acknowledgment = "This work was supported by National Aeronautics and Space Administration under grant award 80NSSC20K1803 and 80NSSC21K1801";
}