HOLIVAR 2006 :: News Feeds

HOLIVAR 2006 :: News Feeds

Climate and Environment News Feeds

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RealClimate

22nd May 2008 > How to cook a graph in three easy lessons
These days, when global warming inactivists need to trot out somebody with some semblance of scientific credentials (from the dwindling supply who have made themselves available for such purposes), it seems that they increasingly turn to Roy Spencer, a Principal Research Scientist at the University of Alabama. Roy does have a handful […]

18th May 2008 > Climate Change and Tropical Cyclones (Yet Again)
By Rasmus Benestad & Michael Mann Just as Typhoon Nargis has reminded us of the destructive power of tropical cyclones (with its horrible death toll in Burma–around 100,000 according to the UN), a new paper by Knutson et al in the latest issue of the journal Nature Geosciences purports to project a reduction in […]

13th May 2008 > The Global Cooling Bet – Part 2
Last week we proposed a bet against the “pause in global warming” forecast in Nature by Keenlyside et al. and we promised to present our scientific case later – so here it is. This is why we do not think that the forecast is robust:

12th May 2008 > What the IPCC models really say
Over the last couple of months there has been much blog-viating about what the models used in the IPCC 4th Assessment Report (AR4) do and do not predict about natural variability in the presence of a long-term greenhouse gas related trend. Unfortunately, much of the discussion has been based on graphics, energy-balance models and descriptions […]

8th May 2008 > Global Cooling-Wanna Bet?
By Stefan Rahmstorf, Michael Mann, Ray Bradley, William Connolley, David Archer, and Caspar Ammann Global cooling appears to be the ?flavour of the month?. First, a rather misguided media discussion erupted on whether global warming had stopped, based on the observed temperatures of the past 8 years or so (see our post). Now, an entirely new […]

30th Apr 2008 > Back to the future
A few weeks ago I was at a meeting in Cambridge that discussed how (or whether) paleo-climate information can reduce the known uncertainties in future climate simulations. The uncertainties in the impacts of rising greenhouse gases on multiple systems are significant: the potential impact on ENSO or the overturning circulation in the North Atlantic, probable feedbacks […]

23rd Apr 2008 > Butterflies, tornadoes and climate modelling
Many of you will have seen the obituaries (MIT, NYT) for Ed Lorenz, who died a short time ago. Lorenz is most famous scientifically for discovering the exquisite sensitivity to initial conditions (i.e. chaos) in a simple model of fluid convection, which serves as an archetype for the weather prediction problem. He is most […]

22nd Apr 2008 > Impressions from the European Geophysical Union conference 2008
Last week, the European Geophysical Union held its annual general assembly, with thousands of geophysicists converging on the city of Vienna, Austria. It was time to take the pulse of the geophysical community. When registering at the conference, we got a packet called ‘Planet Earth; Directions for Use’. As far as I know, this is […]

18th Apr 2008 > Moulins, Calving Fronts and Greenland Outlet Glacier Acceleration
Guest Commentary by Mauri Pelto The net loss in volume and hence sea level contribution of the Greenland Ice Sheet (GIS) has doubled in recent years from 90 to 220 cubic kilometers/year has been noted recently (Rignot and Kanagaratnam, 2007). The main cause of this increase is the acceleration of several large outlet glaciers. […]

10th Apr 2008 > Model-data-comparison, Lesson 2
In January, we presented Lesson 1 in model-data comparison: if you are comparing noisy data to a model trend, make sure you have enough data for them to show a statistically significant trend. This was in response to a graph by Roger Pielke Jr. presented in the New York Times Tierney Lab Blog that compared […]

 

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