by Richard Gray, February 6, 2015 in MailOnline
- Geophysicists at Columbia University have found underwater volcanoes erupt in regular cycles that range from a fortnight to 100,000 years
- They claim that volcanoes on the sea floor are currently experiencing a lull
- They warn an increase in eruptions will contribute more to climate change
- Some climate models have assumed they erupt at a steady rate over time
- The new research shows they change with the seasons and Earth’s orbit
See also here
by E.H. van Nes et al., March 30, 2015 in Nature Climate Change
The statistical association between temperature and greenhouse gases over glacial cycles is well documented, but causality behind this correlation remains difficult to extract directly from the data.
We show that such variable time lags are typical for complex nonlinear systems such as the climate, prohibiting straightforward use of correlation lags to infer causation.
by Eric Worrall, November 22, 2017 in WUWT
Figure 1 shows one example of data derived from such proxy sources. The top panel of the figure shows a declining temperature trend over the 8,000-year period from the Holocene Climate Optimum to the modern warm period (left-hand scale). It also shows that this location experienced numerous cycles of warming and cooling that involved temperature changes of the order of two degrees Celsius.
by Steve Penn, November 22, 2017 in ClimateChangeDispatch
(…) It seemed obvious to me that there was a climate change problem. I heard about it—and read about it—every day in the news. Eventually, I started to study the issue, thinking that I needed to understand it better to write informed articles on the subject (…)
by Antero Ollila, November 21, 2017 in WUWT
The error of the IPCC climate model is about 50% in the present time. There are two things that explain this error:
1) There is no positive water feedback in the climate, and 2) The radiative forcing of carbon dioxide is too strong.
See also here
by Anthony Watts, November 21, 2017 in WUWT
Rapid expansion of the Arctic sea ice cover is the norm for October as solar input dwindles and the remaining heat in the upper ocean is released upwards, warming the lower atmosphere and escaping to space. Because of late season growth, the seasonal Antarctic maximum we previously reported as occurring on September 15 was exceeded, with a new maximum set on October 11 and 12. This is the second-lowest and second-latest seasonal maximum extent in the satellite record.