Is realistic Antarctic sea ice extent in climate models the result of excessive ice drift?

first_imgFor the first time, we compute the sea-ice concentration budget of a fully coupled climate model, the Australian ACCESS model, in order to assess its realism in simulating the autumn–winter evolution of Antarctic sea-ice. The sea-ice concentration budget consists of the local change, advection and divergence, and the residual component which represents the net effect of thermodynamics and ridging. Although the model simulates the evolution of sea-ice area reasonably well, its sea-ice concentration budget significantly deviates from the observed one. The modelled sea-ice budget components deviate from observed close to the Antarctic coast, where the modelled ice motion is more convergent, and near the ice edge, where the modelled ice is advected faster than observed due to inconsistencies between ice velocities. In the central ice pack the agreement between the model and observations is better. Based on this, we propose that efforts to simulate the observed Antarctic sea-ice trends should focus on improving the realism of modelled ice drift.last_img read more

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Farm to table

first_imgby: Anthony DemangoneI’m not a foodie. But I have many friends who are.More and more people take pictures of their food and post them to Twitter and Facebook. Not for me, but you can’t deny that it is a trend.Another trend that I actually like is learning the source of my food. Who grew my brussel sprouts? (Yes, I love them!) Who raised the beef? Who baked the bread?I like supporting local farms and businesses. I like fresh food. “Farm to table,” simply makes sense.That idea not only has legs, but it applies to credit unions and their volunteers.Remember It’s a Wonderful Life? Remember the bank run? continue reading » 6SHARESShareShareSharePrintMailGooglePinterestDiggRedditStumbleuponDeliciousBufferTumblrlast_img read more

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