What do we know about Arctic sea ice trends?

by Dr. Ronan Connolly & Dr. Michael Connolly

Satellite observations indicate that the average Arctic sea ice extent has generally decreased since the start of the satellite records in October 1978. Is this period long enough to assess whether the current sea level trend is unusual, and to what extent the decline is caused by humans?

Continue reading

The blame game

by Judith Curry

For the sake of argument, let’s accept the IPCC conclusions regarding attribution of global warming, and their 21st century projections.  So, exactly who in the U.S. bears the blame for current and future damages?

Continue reading

Nature Unbound IV – The 2400 Bray cycle. Part C

by Javier

A possible mechanism for the effect of solar variability on climate, whereby solar variability acts over the stratospheric pressure system transmitting the changes top-down, and over ocean temperatures bottom-up.

Continue reading

Electricity in Texas. Part II: the cost of a 100% renewable grid

by Peter Davies

While onshore wind generation has been relatively inexpensive for some time, solar PV and lithium ion battery storage costs have recently shown dramatic reductions. So can Texas, with excellent onshore wind and solar resources, be powered economically entirely by renewables in the 2030-40 time frame? This article brings together the available public material to estimate the cost.

Continue reading

Week in review – science and policy edition

by Judith Curry

A few things that caught my eye this past week. Continue reading

Update on the strength of aerosol forcing

by Frank Bosse

Increasing evidence of small aerosol forcing supports the importance of internal variability in explaining inter hemispheric differences in temperature variability.

Continue reading

Stealth advocacy: a survey of weathercasters’ views on climate change

by Mike Smith

For a decade, the weathercaster and broadcast meteorology communities have been subject of a focused campaign to force them to cover global warming in a manner acceptable to the American Meteorological Society, the American Geophysical Union and other advocacy groups.

Continue reading