wind speed increase


A 240 yr run of the ECHAM4/OPYC3 coupled ocean-atmosphere model with transient greenhouse gas (GHG) forcing according to the IPCC IS92a scenario is examined with respect to simulated changes in boreal winter cyclone activity and 10 m wind speeds over Europe, the North Atlantic and Eastern North America. ..

Increases of mean wind speeds and of wind speed extremes are identified over Northern Europe and parts of the East Atlantic. The wind signal is due to an increase in wind speed variability and an intensification of the westerly mean current connected with an enhanced mean pressure gradient…

There are also strong wind speed increases over Hudson Bay and the Greenland Sea.

They are restricted to the planetary boundary layer and appear to be connected to the reduction in winter mean sea-ice cover, which leads to locally decreased static stability and‹over the Greenland Sea‹also to a reduction in surface roughness.

P.Knippertz and others, Inter-Research Climate Research, published in CR Vol 15, No 2, online publication date July 20 2000.