Siberia Boreal

     Siberia Boreal (Environmental Impacts on major biomes)

+5 degrees C

increasing in total NPP (0.392 -0.426= - 0.034kgC/m2yr)

Cool grass (0392-0.426=-0.034)

→ all PFTs increasing

Precipitation +20%

increasing in total NPP = - 0.008kgC/m2yr)

Cool grass = - 0.008)

→ all PFTs increasing

CO2x2

increasing in total NPP =- 0.081kgC/m2yr)

Cool grass =-0.081)

→ all PFTs increasing

Combined

increase in total NPP = -0.142kgC/m2yr)

Cool grass =-0.142

IPCC at the High Level Summit on Climate Change

Nearly 100 world leaders accepted UN Secretary-General Ban Ki-moon's invitation to participate in an historic Summit on Climate Change.  During the opening ceremony, the Chairman of the IPCC,  Mr R.K. Pachauri addressed the Summit.

Summit of Climate Change

“Failure to reach broad agreement in Copenhagen would be morally inexcusable, economically short-sighted and politically unwise,” the Secretary-General said in his opening address. “Now is the moment to act in common cause.”

"There is little time left. The opportunity and responsibility to avoid catastrophic climate change is in your hands," Mr. Ban said, closing the day-long Summit on Climate Change.

The Summit marked the first UN visit for the Presidents of China and the United States as well as the newly elected Prime Minister of Japan.

Reasons of Ocean Change

A successful attempt has been made to assess the causes of observed sea level rise. During the peaked of last ice-age (21,000 years ago) the average global sea level was 120m lower than today. As fresh water continue to add into the oceans from melting down of ice sheets and glaciers, sea level rose over a meter per century. Global mean sea level change results from two major processes, mostly related to recent climate change, that alter the volume of water in the global ocean: i) thermal expansion, and ii) the exchange of water between oceans and other reservoirs (glaciers and ice caps, ice sheets, other land water reservoirs - including through anthropogenic change in land hydrology, and the atmosphere).Vertical land movements such as resulting from glacial isostatic adjustment (GIA), tectonics, subsidence and sedimentation influence local sea level measurements but do not alter ocean water volume; nonetheless, they affect global mean sea level through their alteration of the shape and the volume of the ocean basins containing the water. 


Meier.F and J.Whar in 2002 have explained this in much more detail in their article "Sea level is rising: Do we know why?" which can be found on "PNAS May 14, 2002 vol. 99 no. 10, 6524–6526.". So I would recommend this as further reading.