Fred Michel, an Arctic specialist from Carleton University, in an interview, discusses Arctic ice shelf break-up. http://www.cfra.com/chum_audio/Fred_Michel_Jan10.mp3
Looking at the Ward Hunt Ice Shelf, the specialist literature distinguished between “basement” ice that is relatively old and firn ice that is much younger. The “basement ice” period ended with the end of the “first ablation period” which Crary 1960 dated to ~1600 BP – a date which Lyons et al 1973 noted to […]
It’s a dangerous practice to let your eye get teased into visual comparisons, but I was struck by a comparison between the G Bulloides series from the Arabian Sea (which is an upwelling proxy) and Stott’s Warm Pool SST proxies.
I plotted up the tracks of all Atlantic hurricanes with peak winds of at lest 110 knots in time-tranches color-coding the track in 30-knot groups. One thing that intrigued me – it’s probably nothing particular remarkable to specialists – is that many of the big hurricanes had surprisingly similar tracks. Look at the plots below […]
The Ward Hunt Ice Shelf has a rather complicated history and stratigraphy. Fortunately, the original studies of the Ward Hunt Ice Shelf in the 1960s and 1970s were done by geologists rather than climatologists and, as a result, there are decent maps in the early literature showing relevant details of the stratigraphy. (Compare their maps […]
Late last year and early this year, various news stories reported the demise of the Ayles Ice Shelf, Ellesmere Island. On Dec. 29, 2006, National Geographic reported Giant Ice Shelf Breaks Off in Canadian Arctic and on Jan 4, 2007, CNN reported the story. The catastrophe actually occurred in August 2005, but no one noticed […]
The Team (at both realclimate and NOAA) have stated in the strongest possible terms that the Holocene Optimum was restricted to summer in the NH extratropics. Reviewing their positions, realclimate here The [Holocene Optimum] is a somewhat outdated term used to refer to a sub-interval of the Holocene period from 5000-7000 years ago during which […]
Earlier we noted that the number of hurricane-days in 1933 actually exceeded the number of hurricane-days in 2005. However, the 2005 PDI was significantly higher than 1933 PDI, which indicates fairly trivially that hurricane speeds in 2005 were estimated to be higher than 1933. So here is a histogram of 1933 compared to 2005 wind-speed […]
Paul Linsay contributes the following: Using Landsea’s data from here, plus counts of 15 and 5 hurricanes in 2005 and 2006 respectively, I plotted up the yearly North Atlantic hurricane counts from 1945 to 2004 and added error bars equal to as is appropriate for counting statistics. The result is in Figure 1. Figure 1. […]
Here’s a figure showing Judith Curry’s PDI as compared to calculations from my collation of the ATL track data previously archived, also comparing PDI – which is the integral of wind speed cubed against other measures: a count of hurricane-days, an integral of wind speed and an integral of wind speed squared (which I think […]
Climate Audit 