Global

Temperature of the water column; Snow and ice mass, thickness and extent

Inapplicable

Brief description of the data The SST and ice concentration data were taken from HadGEM1 simulations. The data was transformed from the HadGEM1 grid to the same 1x1 degree grid used for the HadISST1 dataset. The fields are monthly means. The datasets were constructed by Claire Barnett of the Met Office's Technology and Applied Science Group. These sea surface temperature (SST) and ice datasets has been constructed primarily for use as external forcing for proposed transient climate-chemistry models (CCMs) simulations supporting the upcoming WMO/UNEP ozone assesment report. The proposed simulations will use the IPCC SRES scencario AIB with SSTs and sea ice taken from coupled atmosphere-ocean model simulations following the same SRES scenario. For this purpose SST and ice datesets have been derived using output from UK Met Office HadGEM1 simulations performed for the IPCC fourth assessment report. The HadGEM1 simulations had historical anthropogenic forcing from December 1970 to November 1999 (simulation started December 1859) , and followed the SRES A1B scenario from December 1999 to December 2099. Volcanic stratospheric aerosols and solar irradiance were constant.

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