by NASA/Goddard Space Flight Center, March 21, 2017
Arsia Mons produced one new lava flow at its summit every 1 to 3 million years during the final peak of activity, about 50 million years ago. The last volcanic activity there ceased about 50 million years ago — around the time of Earth’s Cretaceous-Paleogene extinction, when large numbers of our planet’s plant and animal species (including dinosaurs) went extinct.
Journal Reference:Jacob A. Richardson, James A. Wilson, Charles B. Connor, Jacob E. Bleacher, Koji Kiyosugi. Recurrence rate and magma effusion rate for the latest volcanism on Arsia Mons, Mars. Earth and Planetary Science Letters, 2017; 458: 170 DOI: 10.1016/j.epsl.2016.10.040
by VENCORE WEATHER, March 20, 2017
Third weakest solar cycle since 1755
A recent publication has analyzed the current solar cycle and has found that when sunspot anomalies are compared to the mean for the number of months after cycle start, there have been only two weaker cycles since observations began in 1755. Solar cycle 24 began in 2008 after a historically long and deep solar minimum which puts us more than eight years into the current cycle.
by David Archibald, March 8, 2010
The greenhouse gasses keep the Earth 30° C warmer than it would otherwise be without them in the atmosphere, so instead of the average surface temperature being -15° C, it is 15° C. Carbon dioxide contributes 10% of the effect so that is 3° C. The pre-industrial level of carbon dioxide in the atmosphere was 280 ppm. So roughly, if the heating effect was a linear relationship, each 100 ppm contributes 1° C. With the atmospheric concentration rising by 2 ppm annually, it would go up by 100 ppm every 50 years and we would all fry as per the IPCC predictions.
But the relationship isn’t linear, it is logarithmic. In 2006, Willis Eschenbach posted this graph on Climate Audit showing the logarithmic heating effect of carbon dioxide relative to atmospheric concentration
by David Middleton, March 20, 2017
Firstly, the prime minister is exactly correct: “No country would find 173 billion barrels of oil in the ground and just leave them there.” Particularly if those 173 billion barrels were proved reserves. At $50/bbl, 173 billion barrels is worth a lot of dollars… both US and Canadian.
Secondly, the prime minister is exactly correct here too: “The prime minister has long maintained that developing fossil-fuel resources can go ‘hand in hand’ with fighting climate change.” Since fighting climate change is about as possible as fighting plate tectonics or entropy, it absolutely “can go ‘hand in hand’ with” developing fossil fuel resources.
by Kenneth Richard, March 20, 2017
According to an estimate of global sea surface temperature (SST) changes during the last 2,000 years (“Robust global ocean cooling trend for the pre-industrial Common Era“), the addition of the last 2 centuries (1800 to 2000 C.E.) of relatively modest SST warming only changes the overall per-millennium global cooling trend (~0.4°C) by one tenth of one degree. In other words, using a long-term perspective, the Holocene cooling trend has continued largely uninterrupted during the last two centuries.
International Energy Agency, March 17, 2017
The biggest drop came from the United States, where carbon dioxide emissions fell 3%, or 160 million tonnes, while the economy grew by 1.6%. The decline was driven by a surge in shale gas supplies and more attractive renewable power that displaced coal. Emissions in the United States last year were at their lowest level since 1992, a period during which the economy grew by 80%.
by Columbia University, Earth Observatory, February 5, 2015
Vast ranges of volcanoes hidden under the oceans are presumed by scientists to be the gentle giants of the planet, oozing lava at slow, steady rates along mid-ocean ridges. But a new study shows that they flare up on strikingly regular cycles, ranging from two weeks to 100,000 years …
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.