Add PIOMAS (Arctic monthly mean sea ice thickness)

PIOMAS is a regional sea-ice-ocean modell which assimilates sea-ice and temperature data and is often considered a re-analysis.

• source: http://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/

• reference:

  • Volume time series and uncertainties: Schweiger, A., R. Lindsay, J. Zhang, M. Steele, H. Stern, Uncertainty in modeled arctic sea ice volume, J. Geophys. Res., doi:10.1029/2011JC007084, 2011
  • Model details: Zhang, J.L. and D.A. Rothrock, “Modeling global sea ice with a thickness and enthalpy distribution model in generalized curvilinear coordinates“, Mon. Weather Rev., 131, 845-861, 2003

• data: http://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/data/