sunshine hours

February 22, 2014

Antarctic Glacier Melted Just as Fast 8,000 Years Ago

Filed under: Antarctic — sunshinehours1 @ 4:33 AM
Tags: , , , ,

The AGW Cult loved the word “unprecedented”. They claim the warming that stopped in 1998 was unprecedented.

It turned out that was not true. Another nail in the coffin for “unprecedented” is this paper.

“Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet, has been undergoing rapid thinning and retreat for the past two decades. Here we demonstrate, using glacial-geological and geochronological data, that Pine Island Glacier also experienced rapid thinning during the early Holocene, around 8,000 years ago. Cosmogenic 10Be concentrations in glacially-transported rocks show that this thinning was sustained for decades to centuries at an average rate of more than 100 cm yr−1, comparable to contemporary thinning rates. The most likely mechanism was a reduction in ice shelf buttressing. Our findings reveal that Pine Island Glacier has experienced rapid thinning at least once in the past, and that, once set in motion, rapid ice sheet changes in this region can persist for centuries.”

(h/t Register via GWPF)


October 10, 2013

Precedented Warming in Antarctica

Filed under: Antarctic,Precedented — sunshinehours1 @ 7:38 AM

Warmists like to claim warming in every part of the world is unprecedented.

This paper says just the opposite. Warming has been more dramatic in the 1700s and 1800s than today.

“We present a new stable isotope record from Ellsworth Land which provides a valuable 308-year record (1702-2009) of climate variability from coastal West Antarctica. Climate variability at this site is strongly forced by sea surface temperatures (SSTs) and atmospheric pressure in the tropical Pacific and related to local sea ice conditions. The record shows that this region has warmed since the late 1950s, at a similar magnitude to that observed in the Antarctic Peninsula and central West Antarctica, however, this warming trend is not unique. More dramatic isotopic warming (and cooling) trends occurred in the mid-19th and 18th centuries, suggesting that at present the effect of anthropogenic climate drivers at this location has not exceeded the natural range of climate variability in the context of the past ~300 years.



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