Posts Tagged ‘climate extremes’

Hansen’s Temperature Analysis: Today’s Normal is Yesterday’s Extreme–and Nobody Cares

Thursday, August 23rd, 2012

Source:  MasterResource

by Chip Knappenberger

Hansen arrested

Yesteryear’s climate extremes are today’s climate normals. Yet we are largely oblivious and better off. A hundred years from now the same will be true. Ho hum….

But not everyone thinks this way. Take NASA’s James Hansen for example.

Hansen has recently published a prominent paper (in the Proceedings of the National Academy of Sciences, PNAS) and placed a prominent op-ed (in the Washington Post) that are aimed at raising the public’s awareness of the impacts of climate change, both now and in the future. In a rather candid admission for a scientific paper (and one which in most cases would have resulted in an immediate rejection), Hansen (and co-authors) proclaim that “…we were motivated in this research by an objective to expose effects of human-made global warming as soon as possible…” To drive the point home further, Hansen’s op-ed was headlined “Climate change is here — and worse than we thought.” (more…)

IPCC Confirms: We Do Not Know If The Climate Is Becoming More Extreme

Friday, March 30th, 2012

Source:  Climate policy network

CCNet –  29 March 2012
The Climate Policy Network

IPCC Confirms: We Do Not Know If The Climate Is Becoming More Extreme

The full IPCC Special Report on Extremes is out today, and I have just gone through the sections in Chapter 4 that deal with disasters and climate change. Kudos to the IPCC — they have gotten the issue just about right, where “right” means that the report accurately reflects the academic literature on this topic. Over time good science will win out over the rest — sometimes it just takes a little while. –Roger Pielke Jr, 28 March 2012

FAQ 3.1 Is the Climate Becoming More Extreme? [...]None of the above instruments has yet been developed sufficiently as to allow us to confidently answer the question posed here. Thus we are restricted to questions about whether specific extremes are becoming more or less common, and our confidence in the answers to such questions, including the direction and magnitude of changes in specific extremes, depends on the type of extreme, as well as on the region and season, linked with the level of understanding of the underlying processes and the reliability of their simulation in models.–IPCC Special Report on Extreme Events and Disasters

There is medium evidence and high agreement that long-term trends in normalized losses have not been attributed to natural or anthropogenic climate change… The statement about the absence of trends in impacts attributable to natural or anthropogenic climate change holds for tropical and extratropical storms and tornados… The absence of an attributable climate change signal in losses also holds for flood losses.  –IPCC Special Report on Extremes, Chapter 4

Plans to force companies to declare the size of their greenhouse gas emissions have been put on hold and could even be abolished, the environment secretary will tell parliament this week, raising fresh questions over the government’s commitment to fighting climate change. –Kiran Stacey, Financial Times, 28 March 2012 (more…)