Category Archives: Climate Changes

Record 2018 Snowfall Contrary to UN IPCC Report

“The record snowfalls of 2018 that are sweeping across the Northern Hemisphere and continuing the growth trend in winter snowfall levels provide yet more compelling evidence that the UN IPCC AR5 WG1 climate report and models are flawed because this report concludes that future snowfall level trends will only decline.” click here

Ice-Free Greenland Cooling, Not Warming

Andreas Westergaard-Nielsen et al. Contrasting temperature trends across the ice-free part of Greenland. Scientific Reports, volume 8, Article number: 1586 (2018)

Temperature changes in the Arctic have notable impacts on ecosystem structure and functioning, on soil carbon dynamics, and on the stability of permafrost, thus affecting ecosystem functions and putting man-built infrastructure at risk. Future warming in the Arctic could accelerate important feedbacks in permafrost degradation processes. Therefore it is important to map vulnerable areas most likely to be impacted by temperature changes and at higher risk of degradation, particularly near communities, to assist adaptation to climate change. Currently, these areas are poorly assessed, especially in Greenland. Here we quantify trends in satellite-derived land surface temperatures and modelled air temperatures, validated against observations, across the entire ice-free Greenland. Focus is on the past 30 years, to characterize significant changes and potentially vulnerable regions at a 1 km resolution. We show that recent temperature trends in Greenland vary significantly between seasons and regions and that data with resolutions down to single km2 are critical to map temperature changes for guidance of further local studies and decision-making. Only a fraction of the ice-free Greenland seems vulnerable due to warming when analyzing year 2001–2015, but the most pronounced changes are found in the most populated parts of Greenland. As Greenland represents important gradients of north/south coast/inland/distance to large ice sheets, the conclusions are also relevant in an upscaling to greater Arctic areas.

North Atlantic climate variability consistent with Atlantic Multidecadal Oscillation

Marie Nicolle et al. Climate variability in the subarctic area for the last 2 millennia. Climate of the Past, 14, 101–116, 2018

To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A ∼ 16–30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas ∼ 20–30- and ∼ 50– 90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice–temperature positive feedback.

Australia’s Great Barrier Reef is Doing Just Fine, Thank You

“The truth, of course, is that the Great Barrier Reef (GBR) isn’t dying at all. (As we’ve written here and here)

In fact it’s doing just fine and the gagged professor – Peter Ridd of James Cook University – has plenty of solid scientific evidence to prove it.” click here

500-Year Cycle Signals in Solar Activity

Lihua Ma, Zhiqiang Yin, Yanben Han. Quasi 500-Year Cycle Signals in Solar Activity, Earth Science Research; Vol. 7, No. 1; 2018

Direct observations of solar activity are available for the past four century, so some proxies reflecting solar activity such as 14C, 10Be and geomagnetic variations are used to reconstruct solar activity in the past. In this present paper, the authors use rectified wavelet power transform and time-averaged wavelet power spectrum to investigate long-term fluctuations of the reconstructed solar activity series. The results show an obvious quasi 500-year cycle exists in the past solar activity. Three reconstructed solar activity series from 14C variations confirm the periodic signals.

Global warming doomsday scenarios are not credible

“A new study published in the prestigious journal Nature finds that all those global warming doomsday scenarios aren’t credible. Not that you would ever know based on how little coverage this study is getting.” click here

Cold periods due to natural cycles, not global warming

“Yet, as the cold approaches, global warming activists are now feverishly scrambling to blame it on “global warming” in a desperate bid to dampen the embarrassment of their earlier predictions of balmy, snowless winters. They insist that the cold shots are due to global warming disrupting weather patterns.” click here