Posts Tagged ‘Antarctic temperatures’

Antarctic ice shelves not melting at all, new field data show

Tuesday, June 26th, 2012

Source:  Register

Image Source Page: http://www.3dwallpapers.co.in/view/eroded-iceberg-in-the-lemaire-channel-antarctica-1600x1200.html

Crafty boffins got elephant seals to survey for them

By Lewis Page

Twenty-year-old models which have suggested serious ice loss in the eastern Antarctic have been compared with reality for the first time – and found to be wrong, so much so that it now appears that no ice is being lost at all.

“Previous ocean models … have predicted temperatures and melt rates that are too high, suggesting a significant mass loss in this region that is actually not taking place,” says Tore Hattermann of the Norwegian Polar Institute, member of a team which has obtained two years’ worth of direct measurements below the massive Fimbul Ice Shelf in eastern Antarctica – the first ever to be taken. (more…)

The Antarctica climate evidence is irrefutable – the southern polar region is cooling, not warming as IPCC predicted

Saturday, January 21st, 2012

Source: C3Headlines

Antarctica: IPCC Proven Conclusively Wrong By Newest Research – South Pole Cooling

(click on images to enlarge)

Antarctica cooling last 30 years chart Antarctica Cooling and CO2 oct2011

Read here. The chart on the left is new empirical evidence released by the German climate research organization, the Alfred Wegener Institute. Their polar weather station temperature records clearly confirm the cooling trend as previously measured by satellite over the last 30 years (chart on the right). (more…)

New paper finds some Antarctic temperature measurements show false warming of up to 10°C (18°F)

Thursday, August 11th, 2011

Source:  Hockey Schtick

A paper published today in the Journal of Atmospheric and Oceanic Technologyfinds that temperature measurements on the Antarctic plateau “are shown to be significantly warm biased by solar radiation,” resulting in temperature measurements up to 10°C (18°F) warmer than actual temperatures. The authors find that the summer Sun heats the housing for the electronic thermometers causing the warming bias during summer, which is also exacerbated by low wind conditions. Surface temperature measurements are particularly important at the poles, because satellite measurements of temperature do not include data poleward of 82.5° North and 70° South and the only available measurements in these areas are from surface temperature stations. Considering the tiny change in global temperature over the past 161 years of only 0.7°C, this newly-discovered large warming bias of up to 10°C calls into question data from areas critical to the AGW debate.Journal of Atmospheric and Oceanic Technology 2011 ; e-View (more…)

O’Donnell et al 2010 Refutes Steig et al 2009

Saturday, December 11th, 2010

Source:  Climate Audit

by Steve McIntyre

Do some of you remember Steig et al 2009, a pre-Climategate Nature cover story? Like so many Team efforts, it applied a little-known statistical method, the properties of which were poorly known, to supposedly derive an important empirical result. In the case of Steig et al 2009, the key empirical claim was that strong Antarctic warming was not localized to the Antarctic Peninsula (a prominent antecedent position), but was also very pronounced in West Antarctic. Their claims are set out firmly in the opening sentences of their abstract as follows:

Assessments of Antarctic temperature change have emphasized the contrast between strong warming of the Antarctic Peninsula and slight cooling of the Antarctic continental interior in recent decades. This pattern of temperature change has been attributed to the increased strength of the circumpolar westerlies, largely in response to changes in stratospheric ozone. This picture, however, is substantially incomplete owing to the sparseness and short duration of the observations. Here we show that significant warming extends well beyond the Antarctic Peninsula to cover most of West Antarctica, an area of warming much larger than previously reported. West Antarctic warming exceeds 0.1 deg C per decade over the past 50 years, and is strongest in winter and spring. Although this is partly offset by autumn cooling in East Antarctica, the continent-wide average near-surface temperature trend is positive.

Their claims were illustrated on the cover of Nature as shown below:

Again, to be very clear about this, the “novelty” of Steig et al 2009 were their results for West Antarctica – the location of the West Antarctic Ice Sheet. Otherwise, there was nothing in their article that warranted an article in Nature, let alone a cover. (more…)