by Hermann Harde, Global and Planetary Change, 24 February 2017
An alternative carbon cycle is presented in agreement with the carbon 14 decay.
The CO2 uptake rate scales proportional to the CO2 concentration.
Temperature dependent natural emission and absorption rates are considered.
The average residence time of CO2 in the atmosphere is found to be 4 years.
Paleoclimatic CO2 variations and the actual CO2 growth rate are well-reproduced.
The anthropogenic fraction of CO2 in the atmosphere is only 4.3%.
Human emissions only contribute 15% to the CO2 increase over the Industrial Era.
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Science Daily, February 23, 2017
A study of tiny mineral ‘inclusions’ within diamonds from Botswana has shown that diamond crystals can take billions of years to grow. One diamond was found to contain silicate material that formed 2.3 billion years ago in its interior and a 250 million-year-old garnet crystal towards its outer rim, the largest age range ever detected in a single specimen. Analysis of the inclusions also suggests that the way that carbon is exchanged and deposited between the atmosphere, biosphere, oceans and geosphere may have changed significantly over the past 2.5 billion years.
S. Timmerman, J.M. Koornneef, I.L. Chinn, G.R. Davies. Dated eclogitic diamond growth zones reveal variable recycling of crustal carbon through time. Earth and Planetary Science Letters, 2017; 463: 178 DOI: 10.1016/j.epsl.2017.02.001
by Polar Bear Science, February 15, 2017
The 2016 Scientific Working Group report on Baffin Bay and Kane Basin polar bears was released online without fanfare last week, confirming what local Inuit have been saying for years: contrary to the assertions of Polar Bear Specialist Group scientists, Baffin Bay and Kane Basin subpopulations have not been declining but are stable.
par Christophe Magdelaine, 27 juillet 2015
Les principales hypothèses avancées vont des extra-terrestres à l'effondrement du pergélisol, sous l'action du réchauffement climatique, en passant par une nouvelle chute de météorite.
par Christophe Magdelaine, 20 février 2017
Savez-vous combien y a-t-il de continents sur Terre ? 5 ou 6 ? Alors que la question divise encore certaines personnes, un nouveau continent caché en partie sous l'océan Pacifique vient d'être confirmé par une équipe de scientifiques après des dizaines d'années de recherche. Le 7e continent : Zealandia est maintenant officiellement reconnu.
Source : notre-planete.info, http://www.notre-planete.info/actualites/4586-nombre-continents-Terre-Zealandia
The American Interest, February 22, 2017
That’s a big turnaround—producers have succeeded not only in halting a slide predicted by a corresponding fall in global oil prices, but they’ve also been able to once again
by Judith Curry, Feb 2017
Professor Judith A. Curry is the author of over 180 scienti c papers on weather and climate and is a recipient of the Henry G. Houghton Research Award from the Amer- ican Meteorological Society in 1992. She recently retired from the Georgia Institute of Technology, where she held the positions of Professor and Chair of the School of Earth and Atmospheric Sciences. She is currently President of Climate Forecast Appli- cations Network.
by David Middleton, petroleum geologist/geophysicist, February 18, 2017
As the biomass is buried more deeply in the sedimentary column, increasing pressure compacts it, increasing temperature cooks it and over time, the hydrocarbons slowly migrate toward the surface because they are less dense than connate/formation water. The kerogen first cooks to heavy oil, then light oil, then wet thermogenic gas, then thermogenic light gas, then high temperature methane…
By Andy May, February 17, 2017
In November, 2016 the USGS (United States Geological Survey) reported their assessment of the recent discovery of 20 billion barrels of oil equivalent (technically recoverable) in the Midland Basin of West Texas. About the same time IHS researcher Peter Blomquist published an estimate of 35 billion barrels. Compare these estimates with Ghawar Field in Saudi Arabia, the largest conventional oil field in the world, which contained 80 billion barrels when discovered. There is an old saying in the oil and gas exploration business “big discoveries get bigger and small discoveries get smaller.” …
by Saswata Hier-Majumder et al., February 2017
Pervasive upper mantle melting beneath the western US, Earth and Planetary Science Letters (2017). DOI: 10.1016/j.epsl.2016.12.041
New research published in Earth and Planetary Science Letters describes how scientists have used the world’s largest array of seismic sensors to map a deep-Earth area of melting carbon covering 1.8 million square kilometres. Situated under the Western US, 350km beneath the Earth’s surface, the discovered melting region challenges accepted understanding of how much carbon the Earth contains – much more than previously understood …
Read more at: https://phys.org/news/2017-02-scientists-uncover-huge-reservoir-carbon.html#jCp