Archives par mot-clé : CO2

Les émissions de CO2 augmenteraient de 50 % d’ici 2030 si les centrales nucléaires fermaient

by Le Vif Express, 9 décembre 2017


La fermeture des centrales nucléaires belges pourrait entraîner une augmentation de 50% des émissions de CO2 liées à la production d’énergie d’ici 2030, selon le professeur d’économie Johan Albrecht (UGent – Université de Gand), qui est également membre de l’institut de réflexion Itinera. Cela alors que le gouvernement fédéral et les entités fédérées doivent négocier dans les semaines à venir le Pacte énergétique, qui doit fixer l’avenir de la production d’électricité en Belgique.

Australia overdoes carbon reduction by 294mt: could cool world by 0.0002C extra (maybe)

by JoNova, January 3, 2018


Other countries are failing to meet their targets, but we’re not only achieving them, we’re overdoing it. And this is despite our obvious handicaps: like that we have rapid population growth, are further from everywhere and anywhere* except for Antarctica, and we’re the largest coal exporter in the world;

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Carbon isotopes, Part 2 : The Delta Notation

by David Kirtley, December 28, 2017, in SkepticalScicence


In Part 1, we learned about carbon isotopes: how 14C forms in the atmosphere, how different isotopes move through the Carbon Cycle, and how isotopic measurements reveal clues about our changing climate. In this post we will look at how measurements of changing isotopic ratios are described.

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Check out this NOAA link for more. And if you have more time check out the entire series on isotopes. I can’t recommend it enough!

Carbon Loophole: Why Is Wood Burning Counted as Green Energy?

by Fred Pearce, December 19, 2017 in Yale Environment360


In September, some 200 scientists wrote to the EU insisting that “bioenergy [from forest biomass] is not carbon-neutral” and calling for tighter rules to protect forests and their carbon. Yet just a month later, EU ministers rubber-stamped the existing carbon accounting rules, reaffirming that the burning of wood pellets is renewable energy.

CONTAMINATED ICE CORES: EVERYTHING WE KNOW ABOUT PALEO-CLIMATE MAY BE WRONG

by University of York, December 20, 2017 in GWPF

For the first time scientists have directly observed living bacteria in polar ice and snow — an environment once considered sterile. “As microbial activity and its influence on its local environment has never been taken into account when looking at ice-core gas samples it could provide a moderate source of error in climate history interpretations.”

 

OLYMPUS DIGITAL CAMERA

See also here

La modélisation du climat, science ou scientisme ?

by Uzbek, 21 novembre 2017, in Climato-Réalistes


Les prévisions climatiques à très long terme (2100) sont établies à l’aide de modèles qui ne sont rien d’autre des logiciels très complexes, dont le but est de reproduire le comportement du climat terrestre.

Comme on ne peut pas décrire ce qui se passe en tous les points de la terre, celle-ci est découpée en mailles de quelques centaines de kilomètres de côté. Les modèles utilisés par le GIEC pour son cinquième rapport d’évaluation (2013) avaient des résolutions relativement grossières (supérieures à 100 km). La situation évolue toutefois rapidement et les modèles climatiques les plus récents auraient une résolution plus fine (de l’ordre de 20 km).

Egalement ici et ici

Study: no acceleration in global warming, climate sensitivity to CO2 too high

by Anthony Watts, November 29, 2017 in WUWT


New research yields old result: Climate warming slow, steady. Observed value is half that of CMIP5 climate models.

The rate at which Earth’s atmosphere is warming has not significantly accelerated over the past 23 years, according to research at The University of Alabama in Huntsville (UAH).

If you take away the transient cooling in 1983 and 1992 caused by two major volcanic eruptions in the preceding years, the remaining underlying warming trend in the bottom eight kilometers (almost five miles) of the atmosphere was 0.096 C (about 0.17° Fahrenheit) per decade between January 1979 and June 2017.

That was unexpectedly close to the 0.09 C warming trend found when similar research was published in 1994 with only 15 years of data, said Dr. John Christy, director of UAH’s Earth System Science Center.

See also here

Temperatures, Sea Levels, Climate Dynamics ‘Have No Apparent Relationship To Atmospheric CO2’

by Kenneth Richard, November 23, 2017 in NoTricksZone


According to the most basic precepts of anthropogenic global warming (AGW), variations in CO2 concentrations exert significant control on sea surface temperatures, glaciers, sea levels, and generalized climate dynamics (i.e., precipitation patterns).

In particular, high CO2 concentrations, driven by human activity, are presumed to cause dangerously warming ocean waters, rapid glacier melt and sea level rise, and overall disruption to the Earth’s biosphere.

Newly published scientific papers wholly undermine this popularized conceptualization.

In fact, according to Bertrand et al. (2017), there has been a “marked cooling” of sea surface temperatures in the southernmost South America region during the last ~800 years — 3°C to 4°C colder than during the Medieval and Roman warm periods — that has continued unabated into “the most recent decades”.

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