Recent [[model (abstract)|model]]s forecast that even in the unlikely event of greenhouse gases stabilisingstabilizing at present levels, the earth would warm by an additional 0.5°C by 2100, a similar rise in temperature to that seen during the 20th century. In 2050, as much as 64% of that commitment would be due to ''past'' natural forcings. Over time, andtheir thatcontribution influencecompared diminishesto overthe timehuman influence will diminish. Overall, the warming committmentcommitment at 2005 greenhouse gas levels could exceed 1°C.(Wigley 2005). As ocean waters expand in response to this warming, global [[sea level]]s would mount by about 10 centimetrescentimeters during that time. These models do not take into account [[ice cap]] and [[glacier]] melting; including those [[climate feedback]] effects would give a 1°C - 1.5°C estimated temperature increase.<ref>{{cite web |url= http://www.nature.com/news/2005/050314/full/050314-13.html |title= Oceans extend effects of climate change |author= Deirdre Lockwood |date= 2005-05-17 |work= |publisher= [[Nature Publishing Group]] |accessdate=2010-05-07}} </ref>
