Archive for May, 2010

Evidence of climate change

Thursday, May 13th, 2010

Changes in the atmosphere, the oceans and glaciers and ice caps now show unequivocally that the world is warming due to human activities, the Intergovernmental Panel on Climate Change (IPCC) said in report released in November 2007.

The Synthesis Report (AR4) was published on Saturday 17 November 2007.

The report is a landmark with respect to the positive messages about the potential to deal with climate change both in the short and long term. It concluded the following:

• Warming of the climate system is unequivocal and the role of human activities in the observed changes is now clearer than ever. The world is already committed to further warming from past emissions alone.

• The net effect of greenhouse gases and aerosols due to human activities since the pre-industrial era is one of warming (+1.6 Wm-2). This is substantially greater than natural warming or cooling effects over the same period, due to solar changes and volcanoes. (more…)