Feed aggregator

Internal deformation of the subducted Nazca slab inferred from seismic anisotropy

Nature Geoscience Advanced Online - Mon, 11/23/2015 - 00:00

Nature Geoscience. doi:10.1038/ngeo2592

Authors: Caroline M. Eakin, Maureen D. Long, Alissa Scire, Susan L. Beck, Lara S. Wagner, George Zandt & Hernando Tavera

Within oceanic lithosphere a fossilized fabric is often preserved originating from the time of plate formation. Such fabric is thought to form at the mid-ocean ridge when olivine crystals align with the direction of plate spreading. It is unclear, however, whether this fossil fabric is preserved within slabs during subduction or overprinted by subduction-induced deformation. The alignment of olivine crystals, such as within fossil fabrics, can generate anisotropy that is sensed by passing seismic waves. Seismic anisotropy is therefore a useful tool for investigating the dynamics of subduction zones, but it has so far proved difficult to observe the anisotropic properties of the subducted slab itself. Here we analyse seismic anisotropy in the subducted Nazca slab beneath Peru and find that the fast direction of seismic wave propagation aligns with the contours of the slab. We use numerical modelling to simulate the olivine fabric created at the mid-ocean ridge, but find it is inconsistent with our observations of seismic anisotropy in the subducted Nazca slab. Instead we find that an orientation of the olivine crystal fast axes aligned parallel to the strike of the slab provides the best fit, consistent with along-strike extension induced by flattening of the slab during subduction (A. Kumar et al., manuscript in preparation). We conclude that the fossil fabric has been overprinted during subduction and that the Nazca slab must therefore be sufficiently weak to undergo internal deformation.

Selective environmental stress from sulphur emitted by continental flood basalt eruptions

Nature Geoscience Advanced Online - Mon, 11/23/2015 - 00:00

Nature Geoscience. doi:10.1038/ngeo2588

Authors: Anja Schmidt, Richard A. Skeffington, Thorvaldur Thordarson, Stephen Self, Piers M. Forster, Alexandru Rap, Andy Ridgwell, David Fowler, Marjorie Wilson, Graham W. Mann, Paul B. Wignall & Kenneth S. Carslaw

Flashback 1941: Scientist claimed Global Warming Caused Hitler – Warmer temps ‘may produce a trend toward dictatorial govts’ – ‘People are more docile & easily led in warm weather’

Climate Depot - Sun, 11/22/2015 - 14:31
Note: CFACT’s new skeptical documentary, Climate Hustle, is set to rock the UN climate summit with red carpet world premiere in Paris.  # RealClimateScience.com: http://realclimatescience.com/2015/11/science-1941-global-warming-caused-hitler/ Full Article:  Dr. Mills was a professor of experimental medicine at the University of Cincinnati. He was the author of more than eighty articles in scientific journals and of three books, ‘Living [...]

Climatologist: AP Guilty of ‘Yellow Journalism’ – Breaking News from AP: Seth Borenstein, Michael Mann & Andrew Dessler think climate skeptics are wrong!

Climate Depot - Sun, 11/22/2015 - 13:45
Associated Press article rating presidential candidates – November 22, 2015 AP features Michael Mann smearing Ted Cruz: ‘This individual understands less about science (and climate change) than the average kindergartner. That sort of ignorance would be dangerous in a doorman, let alone a president.’ Climate Depot’s Marc Morano reacts to AP: ‘What would AP have found [...]

Obama: Conducting ‘vital business’ at UN climate summit will show that the world is ‘not afraid’ of extremists

Climate Depot - Sun, 11/22/2015 - 11:51
http://www.france24.com/en/20151122-obama-attend-paris-climate-summit-cop-21-not-afraid-extremists-islamic-state?dlvrit=65413 Obama: “I think it’s absolutely vital for every country, every leader, to send a signal that the viciousness of a handful of killers does not stop the world from doing vital business,” Obama said following an Asia-Pacific summit in Malaysia. In addition to hunting down terrorists, missile strikes, curbing jihadist financing and other steps, [...]

Obama & Kerry preparing to travel to Paris for UN climate summit

Climate Depot - Sat, 11/21/2015 - 21:18

Warmist Naomi Klein: ‘Climate change is violence’ – ‘When govts & corporations knowingly fail to act to prevent catastrophic warming, that is an act of violence’

Climate Depot - Sat, 11/21/2015 - 20:57
http://www.theguardian.com/commentisfree/2015/nov/20/paris-climate-talks-protesters-hollande-violence?CMP=share_btn_tw UK Guardian:

37 senators warn Obama to tell the truth about the UN climate deal

Climate Depot - Sat, 11/21/2015 - 10:33
The Washington Examiner reports: Read the entire report.

Analysis: NOAA’s Fabricated ‘Record Temperatures’ – Meanwhile ‘satellites show current warmth well below previous El Nino peaks in 1998 and 2010, and a declining trend’

Climate Depot - Sat, 11/21/2015 - 10:30
Meanwhile, the much more accurate and comprehensive satellites show current warmth well below previous El Nino peaks in 1998 and 2010, and a declining trend.   http://www.woodfortrees.org/plot/rss/from:1998/plot/rss/from:1998/trend

Obama in Malaysia: ‘You’ll See Oceans Rise…More Drought, More Flooding, Bigger Hurricanes, Typhoons’

Climate Depot - Sat, 11/21/2015 - 09:59

Kerry: Doubters of Global-warming Apocalypse Must Be Silenced

Climate Depot - Sat, 11/21/2015 - 07:03

Warmist on skeptics: ‘Let’s Call Them What They Are: Climate Liars’ – Claims credit for coining phrase climate ‘deniers’

Climate Depot - Fri, 11/20/2015 - 13:08

‘Massively Altered’ – German Professor Examines NASA GISS Temperature Datasets

Climate Depot - Fri, 11/20/2015 - 13:01
“Massively Altered” …German Professor Examines NASA GISS Temperature Datasets! http://notrickszone.com/2015/11/20/german-professor-examines-nasa-giss-temperature-datasets-finds-they-have-been-massively-altered/ Veteran journalist Günter Ederer writes a piece reporting that massive alterations have been found in the NASA GISS temperature data series, citing a comprehensive analysis conducted by a leading German scientist. These results are now available to the public. Professor Dr. Friedrich Karl Ewert. Source: [...]

Laser refrigeration of hydrothermal nanocrystals [Applied Physical Sciences]

PNAS Early Edition Articles - Fri, 11/20/2015 - 13:01
Coherent laser radiation has enabled many scientific and technological breakthroughs including Bose–Einstein condensates, ultrafast spectroscopy, superresolution optical microscopy, photothermal therapy, and long-distance telecommunications. However, it has remained a challenge to refrigerate liquid media (including physiological buffers) during laser illumination due to significant background solvent absorption and the rapid (∼ps) nonradiative...

Synthetic CRISPR RNA-Cas9-guided genome editing [Genetics]

PNAS Early Edition Articles - Fri, 11/20/2015 - 13:01
Genome editing with the clustered, regularly interspaced, short palindromic repeats (CRISPR)-Cas9 nuclease system is a powerful technology for manipulating genomes, including introduction of gene disruptions or corrections. Here we develop a chemically modified, 29-nucleotide synthetic CRISPR RNA (scrRNA), which in combination with unmodified transactivating crRNA (tracrRNA) is shown to functionally...

High Court trial starts over UK decommissioning claim

World Nuclear News - Fri, 11/20/2015 - 11:19
Energy Solutions EU (ES EU) and the UK's Nuclear Decommissioning Authority (NDA) met in court this week over the company's claim the government agency violated its own rules last year when it awarded a contract to manage the Magnox Ltd and Research Site Restoration Ltd nuclear sites.

Japanese regulator approves full reactor licences

World Nuclear News - Fri, 11/20/2015 - 11:02
Three Japanese reactors have approval to operate for their full licence periods of 40 years after decisions by the Nuclear Regulation Authority (NRA). One of the units - Sendai 2 - is already in operation, the other two - Takahama 3 and 4 - are soon to restart.

Cold testing complete at UK vitrification plant

World Nuclear News - Fri, 11/20/2015 - 10:27
A demonstration plant to vitrify radioactive waste has completed initial commissioning prior to its deployment at the UK's Sellafield site. The full-scale GeoMelt In-Container Vitrification (ICV) plant is a collaboration between the UK's National Nuclear Laboratory (NNL) and US radioactive waste management specialist Kurion.
Syndicate content