Climate Etc.

Nature Unbound V – The elusive 1500-year Holocene cycle

Nature Unbound V – The elusive 1500-year Holocene cycle

by Javier The existence of a 1500-year climatic cycle during the Holocene, related to the glacial Dansgaard-Oeschger cycle, is a matter of intense debate. However, by introducing precise timing requirements it can be shown that the 1500-year cycle displayed in Northern Hemisphere glacial records is also observed in Holocene records from all over the world.

Continue reading
Hurricane Harvey: long-range forecasts

Hurricane Harvey: long-range forecasts

by Judith Curry The 12 year drought of major hurricane landfalls in the U.S. is over, with catastrophic impacts in Texas.  Predictions of Hurricane Harvey illustrate the realization of extended- and long-range hurricane forecasts.

Continue reading
What do we know about Arctic sea ice trends?

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 […]

Continue reading
The blame game

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

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

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 […]

Continue reading
Nature Unbound IV – The 2400-year Bray cycle. Part B

Nature Unbound IV – The 2400-year Bray cycle. Part B

by Javier In Part A, we established the existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray. This climate cycle correlates in period and phase with a ~ 2400-year cycle in the production of cosmogenic isotopes, that corresponds with clusters of solar grand minima at times of abrupt cooling and climate […]

Continue reading
Alarm about alarmism

Alarm about alarmism

by Judith Curry The climate change debate has entered what we might call the “Campfire Phase”, in which the goal is to tell the scariest story. – Oren Cass (twitter)

Continue reading
Nature Unbound IV – The 2400-year Bray cycle. Part A

Nature Unbound IV – The 2400-year Bray cycle. Part A

By Javier The existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray, is supported by abundant evidence from vegetation changes, glacier re-advances, atmospheric changes reflected in alterations in wind patterns, oceanic temperature and salinity changes, drift ice abundance, and changes in precipitation and temperature. This is established with proxy records from […]

Continue reading