Tag Archives: Antarctica

Antarctica is cooling driven by natural variability

Sebastian Lüning, Mariusz Gałka, Fritz Vahrenholt, The Medieval Climate Anomaly in Antarctica, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 532, 15 October 2019, 109251

The Medieval Climate Anomaly (MCA) is a well-recognized climate perturbation in many parts of the world, with a core period of 1000–1200 CE. Here we are mapping the MCA across the Antarctic region based on the analysis of published palaeotemperature proxy data from 60 sites. In addition to the conventionally used ice core data, we are integrating temperature proxy records from marine and terrestrial sediment cores as well as radiocarbon ages of glacier moraines and elephant seal colonies. A generally warm MCA compared to the subsequent Little Ice Age (LIA) was found for the Subantarctic Islands south of the Antarctic Convergence, the Antarctic Peninsula, Victoria Land and central West Antarctica. A somewhat less clear MCA warm signal was detected for the majority of East Antarctica. MCA cooling occurred in the Ross Ice Shelf region, and probably in the Weddell Sea and on Filchner-Ronne Ice Shelf. Spatial distribution of MCA cooling and warming follows modern dipole patterns, as reflected by areas of opposing temperature trends. Main drivers of the multi-centennial scale climate variability appear to be the Southern Annular Mode (SAM) and El Niño-Southern Oscillation (ENSO) which are linked to solar activity changes by nonlinear dynamics.

Click here for further discussion of this paper.

Antarctic sea ice declining — cause unknown

Claire L. Parkinson. A 40-y record reveals gradual Antarctic sea ice increases followed by decreases at rates far exceeding the rates seen in the Arctic, Proc Natl Acad Sci, https://doi.org/10.1073/pnas.1906556116

A newly completed 40-y record of satellite observations is used to quantify changes in Antarctic sea ice coverage since the late 1970s. Sea ice spreads over vast areas and has major impacts on the rest of the climate system, reflecting solar radiation and restricting ocean/atmosphere exchanges. The satellite record reveals that a gradual, decades-long overall increase in Antarctic sea ice extents reversed in 2014, with subsequent rates of decrease in 2014–2017 far exceeding the more widely publicized decay rates experienced in the Arctic. The rapid decreases reduced the Antarctic sea ice extents to their lowest values in the 40-y record, both on a yearly average basis (record low in 2017) and on a monthly basis (record low in February 2017).

Coastal Antarctic stations show zero warming

Over the past few years, climate alarmists have increasingly been resorting to weather-ambulance chasing, which has necessitated the trotting of the globe in the search of weather anomalies to behold as proof of man-made climate change.

But one place they have been avoiding like the plague is Antarctica as a number of studies have been showing the opposite of what what predicted earlier has been happening down at the South Pole, except for volcanic activity beneath parts of the Antarctic ice shelf.” click here

Antarctic ice sheet melt not so alarming after all

“So, if the Antarctic ice sheet weighs 26,500,000 gigatonnes or 26500000000000000 tonnes

252 billion tonnes is 252 gigatonnes

Really simple math says:  252gt/26,500,000gt x 100 = 9.509433962264151e-4 or 0.00095% change per year

But this is such a tiny loss in comparison to the total mass of the ice sheet, it’s microscopic…statistically insignificant.” click here

Seabed volcanoes influence West Antarctic glacier melts

“New evidence now updates and confirms a column I wrote in June 2014 that some or all of the highly publicized melting of western coastal Antarctic glaciers may be caused by seabed volcanoes rather than having much or anything to do with climate change.” click here

How to lie with maps and data smoothing – NASA

“Here is an infographic I prepared that illustrates the problem. There’s only one datapoint, the Amundsen-Scot south pole station, where there data from it is being smeared over a 1200 kilometer radius in the image above on Reddit, but in the image below, using the controls available at NASA GISTEMP, set to the 250 kilometer smoothing, we can see lots of missing data in Antarctica:” click here

Only mm of sea level rise expected if Antarctic ice shelf melts

“The new study shows that a collapse of Larsen C would result in inland ice discharging about 4 mm to sea level, while the response of glaciers to George VI collapse could contribute over five times more to global sea levels, around 22 mm.” click here