ENSEMBLES RT1: Experimental set up: Boundary forcings

• Greenhouse Gas Impact on Seasonal Experiments (cont.) (18/05/2006)

A paper by Doblas-Reyes et al. describing the impact of a variable GHG concentration on seasonal forecasts has been published in GRL.

• S2D Boundary Forcings (17/12/2004)

Information about the boundary forcings to be used in the s2d integrations can be found here.

• Greenhouse Gas Impact on Seasonal Experiments (24/9/2004)

Results of the experiment carried out at ECMWF to assess the impact on seasonal forecasts of a varying greenhouse gas concentration. The figures show the 2-4 month global average T2m for 2 9-member ensemble experiments carried out with the ECMWF coupled model. The difference between the two experiments consists only the treatment of the greenhouse gas concentration, that is constant (fixed to the 1991 value) in the first plot and varies in the second. As usual, the red dots represent the ERA40 values, the blue ones the ensemble mean and the green box and whiskers the ensemble range. The results are for the May start dates and for the period 1958-1969 and 1991-2001.