by Nick Butler, March 13, 2017
After the dip last year, production of oil from shale rocks in the US is increasing again. Estimates for this year range from a net increase of between 400,000 and 800,000 b/d. And 2017 is not a one-off year. The Permian Basin in Texas — the main focus for the new activity — has oil reserves that exceed those of all the largest discovered fields globally, such as Ghawar in Saudi Arabia and Prudhoe Bay in Alaska
by Jesse Snyder, March 10, 2017
Vicky Hollub, the CEO of Occidental Petroleum Corp., speculated that Permian production could in coming years reach as high as four or five million barrels per day, up from around 2.2 million bpd today.
A confluence of factors has created “near nirvana” for the U.S. shale industry, analysts at Citi Group said in a recent research note. Among those factors was the OPEC-led agreement to curb oil supplies in an attempt to lift prices.
by U.S. Energy Information Administration, update March 7, 2017
Australia, rich in hydrocarbons and uranium resources, was the world’s largest coal exporter in 2015 and the second-largest liquefied natural gas (LNG) exporter in 2015.
Australia is rich in commodities, including fossil fuel and uranium reserves, and is one of the few countries belonging to the Organization for Economic Cooperation and Development (OECD) that is a significant net energy exporter. Australia sent about 68% of its total energy production (includes uranium exports and excludes total energy imports) overseas in fiscal year 2015 (July 2014—June 2015), according to data from the Australian government
par Peter Budgell, 12 février 2016
Si le Canada est le 5e producteur mondial de pétrole (derrière les États-Unis, l’Arabie saoudite, la Russie et la Chine), il le doit à ses gisements de sables bitumineux qui le placent au 3e rang en matière de réserves prouvées (derrière le Venezuela et l’Arabie saoudite). Face à la chute des cours du brut, l’Alberta est toutefois en difficultés et le Premier ministre canadien Justin Trudeau a récemment annoncé une aide financière pour relancer l’économie de cette province pétrolière. Les sables bitumineux sont d’autre part montrés du doigt en raison de leur impact environnemental. Quel sera l’avenir de ces ressources ?
Egalement : les ressources naturelles sont-elles inépuisables?
by B. Lynn Ingram, January 1, 2013
43-day storm that began in December 1861 put central and southern California underwater for up to six months, and it could happen again
Geologic evidence shows that truly massive floods, caused by rainfall alone, have occurred in California every 100 to 200 years. Such floods are likely caused by atmospheric rivers: narrow bands of water vapor about a mile above the ocean that extend for thousands of kilometers.
by Björn Baresel et al., March 6, 2017, Nature
Since the early days of stratigraphy, mass extinctions were noticed to coincide with major and global sea-level changes1,2 that significantly alter extinction patterns and time-series of geochemical proxies. In the case of the Permian-Triassic boundary mass extinction (PTBME), the system boundary itself has been initially placed during a global eustatic regression3, but was subsequently placed during a global transgression4 …
Shock finding : P-T mass extinction was due to an ice age, and not to warming
by University College London, March 1, 2017
Remains of microorganisms at least 3,770 million years old have been discovered by an international team led by UCL scientists, providing direct evidence of one of the oldest life forms on Earth.
Tiny filaments and tubes formed by bacteria that lived on iron were found encased in quartz layers in the Nuvvuagittuq Supracrustal Belt (NSB), Quebec, Canada.
The NSB contains some of the oldest sedimentary rocks known on Earth which likely formed part of an iron-rich deep-sea hydrothermal vent system that provided a habitat for Earth’s first life forms between 3,770 and 4,300 million years ago …
Analysis of tree rings reveals highly abnormal solar activity in the mid-Holocene
by Fusa Miyake et al., January 31, 2017
An international team led by researchers at Nagoya University, along with US and Swiss colleagues, has identified a new type of solar event and dated it to the year 5480 BC.
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.
Also this link
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
par Ales Bartos, 16 février 2017
Étant très marginalisées sur le champ médiatique, les problématiques liées aux sols échappent largement à l'attention du public. Pourtant, la pollution et l'érosion des sols fait annuellement baisser la capacité des sols de produire des aliments en qualité et quantité suffisantes pour nourrir une population mondiale croissante. Cet article tente d'ouvrir des pistes vers une meilleure gestion des sols, physique et réglementaire, s'inscrivant dans les logiques du développement durable.
par D. Swingedouw et al., CNRS, 15 février 2017
Dans le cadre du projet européen EMBRACE, une équipe d’océanographes a réexaminé ces 40 projections climatiques en se focalisant sur un point névralgique au nord-ouest de l’Atlantique Nord : la mer du Labrador. Cette mer est le siège d’un phénomène de convection, qui nourrit à plus grande échelle la circulation océanique de retournement. Ses eaux de surface se refroidissent fortement en hiver, deviennent plus denses que les eaux de profondeur et plongent vers le fond. La chaleur des eaux profondes est transférée vers la surface et empêche la formation de banquise
by Ph.F. Sexton et al., Nature, 2011
‘Hyperthermals’ are intervals of rapid, pronounced global warming known from six episodes within the Palaeocene and Eocene epochs (~65–34 million years (Myr) ago)1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13. The most extreme hyperthermal was the ~170 thousand year (kyr) interval2 of 5–7 °C global warming3 during the Palaeocene–Eocene Thermal Maximum (PETM, 56 Myr ago). The PETM is widely attributed to massive release of greenhouse gases from buried sedimentary carbon reservoirs1, 3, 6, 11, 14, 15, 16, 17, and other, comparatively modest, hyperthermals have also been linked to the release of sedimentary carbon3, 6, 11, 16, 17