Archives de catégorie : better to know…?

Température des océans: la fiabilité des calculs remise en cause

by Le Vif, 31 octobre 2017


Les scientifiques en déduisent que le réchauffement global actuel pourrait potentiellement être “sans précédent” sur les 100 derniers millions d’années. L’étude de ces géochimistes, publiée dans Nature Communications, constitue une sorte de pavé dans la mare des paléoclimatologues qui utilisent depuis les années 1950 ce “paléothermomètre” aidant à bâtir les modèles actuels sur le réchauffement climatique

Al Gore’s Apocalyptic Fantasy Lecture at Rice University

by Andy May, October 24, 2017 in WUWT


As promised, I attended Al Gore’s climate change lecture at Rice University last night. Rice University is one of the most beautiful university campuses I’ve ever seen, so it was a delight to see it again. The architecture is outstanding, and the buildings are placed in a garden-like setting. It was lovely to walk from the parking lot to the fieldhouse. The speech was held in a packed Tudor Fieldhouse which seats 5,750. By the time the Rice University Provost was introducing Al Gore, there were no empty seats that I could see, see Figure 1.

Durable Original Measurement Uncertainty

by Kip Hansen, October 14, 2017 in WUWT


Temperature and Water Level (MSL) are two hot topic measurements being widely bandied about and vast sums of money are being invested in research to determine whether, on a global scale, these physical quantities — Global Average Temperature and Global Mean Sea Level — are changing, and if changing, at what magnitude and at what rate. The Global Averages of these ever-changing, continuous variables are being said to be calculated to extremely precise levels — hundredths of a degree for temperature and millimeters for Global Sea Level — and minute changes on those scales are claimed to be significant and important.

Antarctique: des milliers de bébés manchots meurent de faim en terre Adélie

by l’express, 13 october 2017


La découverte a été effectuée par des scientifiques français du CNRS, dans ce groupe qui vivait sur l’île de Petrels, en terre Adélie. Hormis les deux bébés manchots survivants, ils n’ont retrouvé que des corps d’animaux affamés et des oeufs non-éclos. Ces chercheurs, soutenus par le Fonds mondial pour la nature (WWF), observaient depuis 2010 cette colonie. Selon eux, l’étendue inhabituelle de la banquise a contraint les parents à aller plus loin chercher leur nourriture. Leur progéniture ont succombé à la faim.

Incredible moment more than 230 polar bears descend on a Russian beach to feast on a giant whale carcass

by Will Stewart,  September 29, 2017 in ‘The Sun’ 


The extraordinary sight was witnessed by tourists on an Arctic cruise aboard the Finnish-built MV Akademik Shokalskiy.

A source at Wrangel Island Nature Reserve said: “There were at least 230 polar bears, including single males, single females, mothers with cubs and even two mothers with four cubs each.”

Experts called the sight of so many polar bears together “unique”. The huge number could in fact amount to as much one per cent of the entire world’s population of the creatures.

Techniques d’exploitation des mines de charbon

by Connaissance des Energies, 16 mars 2015


Les gisements sont des zones généralement profondes où l’on trouve de grandes quantités de charbon. Il faut forer des puits pour y accéder et extraire le minerai. Lorsque les réserves de charbon sont relativement proches de la surface de la terre, une exploitation à ciel ouvert peut être mise en place. Il existe également des gisements de charbon sous les océans, pour le moment inexploités.

Possible hominin footprints from the late Miocene (c. 5.7 Ma) of Crete?

by Gerard D. Gierlinski et al., August 31, 2017 in Proc.Geologist’sAssoc.


We describe late Miocene tetrapod footprints (tracks) from the Trachilos locality in western Crete (Greece), which show hominin-like characteristics. They occur in an emergent horizon within an otherwise marginal marine succession of Messinian age (latest Miocene), dated to approximately 5.7 Ma (million years), just prior to the Messinian Salinity Crisis.

Quantifying the causes of the recent decrease in US CO2 emissions

by Roger Andrews, August 23, 2017 in Energy Matters (blog)


Between 2007 and 2015 total annual US CO2 emissions decreased by 740 million tons (12%). An updated analysis shows that 35% of this decrease was caused by natural gas replacing coal in electricity generation, 30% by lower fuel consumption in the transportation sector, 28% by renewables replacing

NASA’s Secret Plan to Save Earth From Super-Volcanoes… Seriously?

by David Middleton, August 18, 2017 in WUWT


If “the supervolcano threat is substantially greater than the asteroid or comet threat,” does this mean we can stop fretting about Gorebal Warming and the Sixth Mass Extinction?  Is NASA really moving on to actual threats to the planet?  Well, not threats to the planet… The planet has handled supervolcanoes, asteroids and comets quite well over its 4.5 billion year lifespan.

Geologists warn us about dangerous volcanoes. Will we spend pennies for warnings?

by Larry Kummer, August 15, 2017


While we obsess about climate change and debate if we live in the Anthropocene, we prepare poorly or not at all for natural forces like volcanoes that can level cities. This is folly we can no longer afford. Experts recommend a simple first step to better protect ourselves. Let’s start listening, or nature will teach us an expensive lesson.

California is the State most at risk due to its volcanoes near major cities, as shown in this map from the website of the California Volcano Observatory

On Carbon Dioxide Toxicity

by Blair King, April 10, 2016


Specifically the Bureau of Land Management Health Risk Evaluation for Cabon Dioxyde  points out:

A value of 40,000 ppm is considered immediately dangerous to life and health based on the fact that a 30-minute exposure to 50,000 ppm produces intoxication, and concentrations greater than that (7-10%) produce unconsciousness (NIOSH 1996; Tox. Review 2005). Additionally, acute toxicity data show the lethal concentration low (LCLo) for CO2 is 90,000 ppm (9%) over 5 minutes (NIOSH 1996).

See also The Lake Nyos Disaster

See also here