Proportion of times in the preceding ten years that sea ice concentration of at least 15% was observed in each grid box. Array of dimension year by longitude by latitude. Computed from NASA Boostrap sea ice concentration product.
data(clim_9_2005_2007)array
Comiso, J., 2017: Bootstrap sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS. version 3. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/7Q8HCCWS4I0R