IPCC: climate change already having effects in real time, far worse to come.

Guardian: “A United Nations report raised the threat of climate change to a whole new level on Monday, warning of sweeping consequences to life and livelihood. The report from the UN’s intergovernmental panel on climate change concluded that climate change was already having effects in real time – melting sea ice and thawing permafrost in the Arctic, killing off coral reefs in the oceans, and leading to heat waves, heavy rains and mega-disasters.”
“And the worst was yet to come. Climate change posed a threat to global food stocks, and to human security, the blockbuster report said.
“Nobody on this planet is going to be untouched by the impacts of climate change,” said Rajendra Pachauri, chair of the IPCC.
Monday’s report was the most sobering so far from the UN climate panel and, scientists said, the most definitive. The report – a three year joint effort by more than 300 scientists – grew to 2,600 pages and 32 volumes.
….The report said climate change had already cut into the global food supply. Global crop yields were beginning to decline – especially for wheat – raising doubts as to whether production could keep up with population growth.
….The future looks even more grim. Under some scenarios, climate change could lead to dramatic drops in global wheat production as well as reductions in maize.
….Other food sources are also under threat. Fish catches in some areas of the tropics are projected to fall by between 40% and 60%, according to the report.
The report also connected climate change to rising food prices and political instability, for instance the riots in Asia and Africa after food price shocks in 2008.
….The report acknowledged that there were a few isolated areas where a longer growing season had been good for farming. But it played down the idea that there may be advantages to climate change as far as food production is concerned.
….The report also warned for the first time that climate change, combined with poverty and economic shocks, could lead to war and drive people to leave their homes.”
http://ipcc.ch/pdf/ar5/pr_wg2/140330_pr_wgII_spm_en.pdf
http://unfccc.int/files/press/press_releases_advisories/application/pdf/pr20143103_ipccwg2.pdf