By Kenneth Richard on 26. December 2024
Ice shelf collapse was much more pronounced and exceptional millennia ago than it has been over the last 47 years. The advent of post-1970s “climate change” and polar amplification due to the rapidly rising trend in human greenhouse gas emissions was supposed to unleash catastrophic ice calving losses and increases in iceberg size throughout the […]
Posted in Antarctic, Cryosphere |
By Kenneth Richard on 5. December 2024
Even though atmospheric CO2 rose from 337 ppm in 1979 to 420 ppm in 2022, there is no evidence of a warming trend across Antarctica during this period. According to a new study, Antarctica’s station data indicate a pronounced cooling trend by over -1°C (-0.53°C per decade) from 1979-1999. The cooling trend thereafter slowed to […]
Posted in Antarctic, Cooling/Temperature |
By Kenneth Richard on 22. November 2024
New research indicates there has been no reduction in sea ice in Antarctica’s Robertson Bay (Ross Sea) during the last century. Instead, the frigid Little Ice Age and its expanded sea ice conditions continue unabated through the 20th and 21st centuries. Between ~8000 and 3500 years before present the Antarctic ice sheet experienced several millennia […]
Posted in Antarctic, Cooling/Temperature, Sea Ice |
By Kenneth Richard on 8. November 2024
“Since the late 1970s, Antarctic sea ice area (SIA) has slowly increased, despite significant global warming. The increase in Antarctic SIA occurred largely between 2000 and 2014.” – Bonan et al., 2024 Scientists attribute the long-term (1979-2022) expanding Antarctic sea ice trend, as well as the abrupt decline in sea ice extent from 2016 to […]
Posted in Antarctic, Natural Variability, Sea Ice |
By Kenneth Richard on 8. August 2024
“Today there is no evidence that B. Gaini lives in permanently frozen lakes.” – Roman et al., 2024 Image Source: Public Domain Image According to a new study (Roman et al., 2024), fairy shrimp Branchinecta gaini occupied the Antarctic Peninsula’s seasonally ice-free Monolithic Lake throughout much of the last 2000 years. There were “longer ice-free […]
Posted in Antarctic, Paleo-climatology |
By P Gosselin on 27. July 2024
The Chinese Academy of Sciences found that the Antarctic cold spells shattered records amid global heat waves in late winter 2023, something we never heard from the mainstream media. Image: NASA (public domain) In report appearing in the online PhysOrg journal, 2023 “brought an unexpected twist with extreme cold events in Antarctica” – according to […]
Posted in Antarctic |
By Kenneth Richard on 16. May 2024
The phenomenon of increasing the concentration of greenhouse gases (water vapor, carbon dioxide, methane) is assumed to lead to sharply rising temperatures in polar regions, or “polar amplification.” As it turns out, it doesn’t. Per a new radiative forcing model (Notholt et al., 2024), increasing CO2 from pre-industrial to present levels (278 to 400 ppm) […]
Posted in Antarctic, Arctic, Climate Sensitivity |
By P Gosselin on 8. May 2024
German weather site wetteronline.de reported “extreme winter cold” in Antarctica as the mercury plummeted to “almost minus 80 degrees Celsius” on April 29, 2024. Image: NASA And it’s not even winter yet. Hat-tip: Heinz “On April 29, almost minus 80 degrees were measured at the Russian Vostok research station. Such extreme cold is rarely reached […]
Posted in Antarctic |
By Kenneth Richard on 15. April 2024
More evidence emerges that Antarctica has undergone rapid glacier and sea ice expansion in recent centuries, in line with the long-term and recent Antarctic cooling trend. West Antarctica’s mean annual surface temperatures cooled by more than -1.8°C (-0.93°C per decade) from 1999-2018 (Zhang et al., 2023). Not just West Antarctica, but most of the continent […]
Posted in Antarctic, Cooling/Temperature, Glaciers |
By Kenneth Richard on 26. February 2024
Retreat rates for the West Antarctic Ice Sheet (WAIS) were massive during the Early Holocene, when CO2 concentrations were low and stable (~265 ppm), dwarfing any retreat rates witnessed in the modern era. New research published in Nature Geoscience (Grieman et al., 2024) assesses the elevation of West Antarctica’s ice sheet fell by ~480 m within […]
Posted in Antarctic, Glaciers, Paleo-climatology |
By Kenneth Richard on 15. January 2024
“Negative TOA [top of atmosphere] forcing of CO2 increase also happens outside of Antarctica. The Arctic sometimes exhibits strong negative CO2 forcing. This phenomenon even occurs in the tropics and mid-latitudes…” – Chen et al., 2024 It has previously been reported that as CO2 increases from 380 ppm to 1000 ppm, the CO2 greenhouse effect […]
Posted in Antarctic, Arctic, Climate Sensitivity, CO2 and GHG |
By P Gosselin on 3. January 2024
Four new studies in prestigious journals show Antarctic ice shelf as stable as ever. Hat-tip: EIKE Klimaschau Andreasen et al (2023) finds net gain A study by Julia R. Andreasen and colleagues looked at the changes in ice shelves, Antarctic-wide, using MODIS (Moderate Resolution Imaging Spectroradiometer) satellite data from 2009 to 2019. Image: Andreasen et […]
Posted in Antarctic |
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