Origin of minor planets’ rings revealed

Published on September 18, 2016

Written by Kobe University

Visualization of Chariklo and its rings ( left; ESO/L. Calçada/M. Kornmesser/Nick Risinger). Visualization of the rings as seen from Chariklo’s surface (right ESO).

Credit: ESO/L. Calçada/Nick Risinger (skysurvey.org)

A team of researchers has clarified the origin of the rings recently discovered around two minor planets known as centaurs, and their results suggest the existence of rings around other centaurs. These findings were published on August 29 in Astrophysical Journal Letters, and introduced in AAS Nova, a website for research highlights from the journals of the American Astronomical Society.

Did the University of Washington Just Cover Up Research Misconduct?

Published on September 17, 2016

Written by Roger Pielke, Jr.

The University of Washington has completed an investigation into the alleged effort by one of its medical school faculty to influence funding decisions by the National Institutes of Health that were based on donations by the NFL. The researcher, Richard Ellenbogen, is also the chair of the NFL’s Head, Neck and Spine Committee. The UW investigation was prompted by an investigation by Democrats on the House Energy and Commerce Committee (here in PDF), released last May. washington

The NIH had awarded funds using the NFL donation to a group at Boston University, and a group that Ellenbogen was affiliated with had been ranked second. USA Today says of the UW investigation (emphasis added):

Uranus & Neptune: Role in Solar Grand Minima and Solar Cycle Modulation?

Published on September 17, 2016

Written by Geoff J. Sharp

Are Uranus & Neptune Responsible for Solar Grand Minima and Solar Cycle Modulation? Study by Geoff J. Sharp. Published in the International Journal of Astronomy and Astrophysics.

ABSTRACT

Detailed solar Angular Momentum (AM) graphs produced from the Jet Propulsion Laboratory (JPL) DE405 ephemeris display cyclic perturbations that show a very strong correlation with prior solar activity slowdowns. These same AM perturbations also occur simultaneously with known solar path changes about the Solar System Barycentre (SSB). The AM perturbations can be measured and quantified allowing analysis of past solar cycle modulations along with the 11,500 year solar proxy records (14C & 10Be). The detailed AM information also displays a recurring wave of modulation that aligns very closely with the observed sunspot record since 1650. The AM perturbation and modulation is a direct product of the outer gas giants (Uranus & Neptune).

uranus-neptune

September 17th Temperatures Plummeting In The US

Published on September 17, 2016

Written by Tony Heller

Prior to 60 years ago, September 17 was normally a very hot day in the US, with the hottest years being 1927, 1895, 1931, 1925 and 1955.

graph-1

On September 17, 1927 almost half of the US was over 90F, and a large percent was over 100F.

Peak Oil: gone and forgotten?

Published on September 16, 2016

Written by bloomberg.com

Google Inc. searches for the idea that once helped propel oil prices to nearly $150 per barrel have dwindled to almost nothing, according to a Sanford C. Bernstein analysis.

The theory that oil prices would have to rise as supply inevitably declined gained hold on popular imaginations in the mid- to late 2000s, but has since languished in internet obscurity, as new discoveries and technology, including the shale revolution that helped push U.S. oil production to a 40-year high, have ensured plentiful amounts of crude in recent years.

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New Climate Paper: Eurasian Tree ring Chronology Not Reliable

Published on September 16, 2016

Written by PSI staff

By revealing complex climate constraints on the productivity of Eurasia’s northern forests, our results question the a priori suitability of boreal tree-ring width chronologies for reconstructing summer temperatures. Diverse growth trends and climate responses across Eurasia’s boreal forest

Lena Hellmann et al (2016) Environmental Research Letters, Volume 11, Number

tree-rings

Abstract

The area covered by boreal forests accounts for ~16{154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117} of the global and 22{154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117} of the Northern Hemisphere landmass. Changes in the productivity and functioning of this circumpolar biome not only have strong effects on species composition and diversity at regional to larger scales, but also on the Earth’s carbon cycle. Although temporal inconsistency in the response of tree growth to temperature has been reported from some locations at the higher northern latitudes, a systematic dendroecological network assessment is still missing for most of the boreal zone. Here, we analyze the geographical patterns of changes in summer temperature and precipitation across northern Eurasia >60 °N since 1951 AD, as well as the growth trends and climate responses of 445 Pinus, Larixand Picea ring width chronologies in the same area and period. In contrast to widespread summer warming, fluctuations in precipitation and tree growth are spatially more diverse and overall less distinct. Although the influence of summer temperature on ring formation is increasing with latitude and distinct moisture effects are restricted to a few southern locations, growth sensitivity to June–July temperature variability is only significant at 16.6{154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117} of all sites (p ≤ 0.01). By revealing complex climate constraints on the productivity of Eurasia’s northern forests, our results question the a priorisuitability of boreal tree-ring width chronologies for reconstructing summer temperatures. This study further emphasizes regional climate differences and their role on the dynamics of boreal ecosystems, and also underlines the importance of free data access to facilitate the compilation and evaluation of massively replicated and updated dendroecological networks.

Read full paper at iopscience.iop.org

Climate Alarmists Promote Junk Time Series Cartoon

Published on September 16, 2016

Written by William M Briggs

The popular web cartoon xkcd has provided a wonderful opportunity to plug my must-read (and too expensive) book Uncertainty: The Soul of Modeling, Probability & Statistics. Buy a copy and follow along.

In this award-eligible book, which has the potential to be read by millions and which has the power to change more lives than even the Atkins Diet, I detail (in the ultimate chapter) the common errors made in time series analysis. Time series are the kind of data you see in, for example, temperature or stock price plots through time.

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Astronomers shed light on different galaxy types

Published on September 14, 2016

Written by International Centre for Radio Astronomy Research (ICRAR)

Galaxies of Stephan’s Quintet in the constellation Pegasus, observed by the Hubble Space Telescope.

Credit: NASA, ESA, and the Hubble SM4 ERO Team.

Australian scientists have taken a critical step towards understanding why different types of galaxies exist throughout the Universe.

The research, made possible by cutting-edge instrumentation, means that astronomers can now classify galaxies according to their physical properties rather than human interpretation of a galaxy’s appearance.

For the past 100 years, telescopes have been capable of observing galaxies beyond our own galaxy, the Milky Way.

Only a few were visible to begin with but as telescopes became more powerful, more galaxies were discovered, making it crucial for astronomers to come up with a way to consistently group different types of galaxies together.

In 1926, the famous American astronomer Edwin Hubble refined a system that classified galaxies into categories of spiral, elliptical, lenticular or irregular shape. This system, known as the Hubble sequence, is the most common way of classifying galaxies to this day.

Despite its success, the criteria on which the Hubble scheme is based are subjective, and only indirectly related to the physical properties of galaxies. This has significantly hampered attempts to identify the evolutionary pathways followed by different types of galaxies as they slowly change over billions of years.

Dr Luca Cortese, from The University of Western Australia node of the International Centre for Radio Astronomy Research (ICRAR), said the world’s premier astronomical facilities are now producing surveys consisting of hundreds of thousands of galaxies rather than the dozens that Hubble and his contemporaries were working with.

“We really need a way to classify galaxies consistently using instruments that measure physical properties rather than a time consuming and subjective technique involving human interpretation,” he said.

In a study led by Dr Cortese, a team of astronomers has used a technique known as Integral Field Spectroscopy to quantify how gas and stars move within galaxies and reinterpret the Hubble sequence as a physically based two-dimensional classification system.

“Thanks to the development of new technologies, we can map in great detail the distribution and velocity of different components of galaxies. Then, using this information we’re able to determine the overall angular momentum of a galaxy, which is the key physical quantity affecting how the galaxy will evolve over billions of years.

“Remarkably, the galaxy types described by the Hubble scheme appear to be determined by two primary properties of galaxies-mass and angular momentum. This provides us with a physical interpretation for the well known Hubble sequence whilst removing the subjectiveness and bias of a visual classification based on human perception rather than actual measurement.”

The new study involved 488 galaxies observed by the 3.9m Anglo Australian Telescope in New South Wales and an instrument attached to the telescope called the Sydney-AAO Multi-object Integral-field spectrograph or ‘SAMI’.

The SAMI project, led by the University of Sydney and the ARC Centre of Excellence for All-sky Astrophysics (CAASTRO), aims to create one of the first large-scale resolved survey of galaxies, measuring the velocity and distribution of gas and stars of different ages in thousands of systems.

“Australia has a lot of expertise with this type of astronomy and is really at the forefront of what’s being done,” said Professor Warrick Couch, Director of the Australian Astronomical Observatory and CAASTRO Partner Investigator.

“For the SAMI instrument we succeeded in putting 61 optical fibres within a distance that’s less than half the width of a human hair.

“That’s no small feat, it’s making this type of work possible and attracting interest from astronomers and observatories from around the world.”

Future upgrades of the instrument are planned that will allow astronomers to obtain even sharper maps of galaxies and further their understanding of the physical processes shaping the Hubble sequence.

“As we get better at doing this and the instruments we’re using are upgraded, we should be able to look for the physical triggers that cause one type of galaxy to evolve into another — that’s really exciting stuff,” Dr Cortese said.

Story Source:

The above post is reprinted from materials provided byInternational Centre for Radio Astronomy Research (ICRAR).Note: Content may be edited for style and length.

Journal Reference:

L. Cortese, L. M. R. Fogarty, K. Bekki, J. van de Sande, W. Couch, B. Catinella, M. Colless, D. Obreschkow, D. Taranu, E. Tescari, D. Barat, J. Bland-Hawthorn, J. Bloom, J. J. Bryant, M. Cluver, S. M. Croom, M. J. Drinkwater, F. d’Eugenio, I. S. Konstantopoulos, A. Lopez-Sanchez, S. Mahajan, N. Scott, C. Tonini, O. I. Wong, J. T. Allen, S. Brough, M. Goodwin, A. W. Green, I.-T. Ho, L. S. Kelvin, J. S. Lawrence, N. P. F. Lorente, A. M. Medling, M. S. Owers, S. Richards, R. Sharp, S. M. Sweet. The SAMI Galaxy Survey: the link between angular momentum and optical morphology. Monthly Notices of the Royal Astronomical Society, September 2016

NASA’s Cassini Probe & Evidence of Electromagnetism on Saturn and its Moons

Published on September 18, 2016

Written by PSI staff

This latest article is one of a series addressing the work of science writer Edsel Chromie. Now retired Chromie has been at the forefront of helping discern unexplained electrical forces in nature. Below we show how NASA’s 2004 Cassini-Huygens space mission not only contradicted conventional explanations about volcanism and gravitational forces but enhanced the credibility of an electromagnetic influence in the Saturn system. cassini

In the previous article,‘Electromagnetism, Saturn’s Rings & The “Geysers” Of Enceladus’ we saw that Chromie had alighted upon a fascinating re-interpretation of perceived “geysers” on the moon of Enscheladus when applying the well-established science of electricity. [Image: NASA]

The BBC on thick ice again…Ship of Fools Scrapes Home

Published on September 17, 2016

Written by Christopher Booker

We have regularly over the years been regaled by the BBC with the exploits of those intrepid climate activists who travel up to the Arctic to prove that, thanks to global warming, its ice is melting away so fast that there will soon be none left.

In 2008 there was the bid by Gordon Pugh to paddle a kayak all the way to the North Pole. Alas, after only a few days he found it was so cold and the ice so thick that he had hastily to be rescued. In 2009 it was the expedition led by Pen Hadow which planned to walk 600 miles to the Pole, measuring just how rapidly the ice was thinning. They too found it so cold and the ice so dangerously thick that they soon had to be airlifted to safety.

Four New Studies Find ‘No Observable Sea-Level Effect’ due to Humans

Published on September 17, 2016

Written by Barbara Hollingsworth

Ten years after former Vice President Al Gore warned in his 2006 Oscar-winning film, An Inconvenient Truth, that if nothing was done to stop man-made global warming, melting Antarctic and Greenland ice sheets could raise sea levels by up to 20 feet, four peer-reviewed scientific studies found “no observable sea-level effect of anthropogenic global warming.”

gore

“It is widely assumed that sea levels have been rising in recent decades largely in response to anthropogenic global warming,” Kenneth Richard writes at NoTricksZone. “However, due to the inherently large contribution of natural oscillatory influences on sea level fluctuations, this assumption lacks substantiation….

“Scientists who have recently attempted to detect an anthropogenic signal in regional sea level rise trends have had to admit that there is ‘no observable sea-level effect of anthropogenic global warming’,” Richard points out, listing four peer-reviewed studies published this year that have all come to the same conclusion.

In a paper published on May 18, Hindumathi Palanisamy at the Laboratoire d’Etudes en Geophysique et Oceanograhie Spatiales (LEGOS) in Toulouse, France and her co-authors explain that “sea level is an integrated climate parameter that involves interactions of all components of the climate system (oceans, ice sheets, glaciers, atmosphere, and land water reservoirs) on a wide range of spatial and temporal scales….

“Since 1993, sea level variations have been measured precisely by satellite altimetry. They indicated a faster sea level rise of 3.3 mm/yr over 1993-2015. Owing to their global coverage, they also reveal a strong regional seal level variability that sometimes is several times greater than the global mean sea level rise,” the researchers state.

“Considering the highly negative impact of sea level rise for society, monitoring sea level change and understanding its causes are henceforth high priorities.”

Comparing sea level changes between 1950 and 2009 in the Indian Ocean, South China and Caribbean Seas, Palanisamy’s team found that the “tropical Pacific displays the highest magnitude of sea level variations.”

the remaining residual sea level trend pattern does not correspond to externally forced anthropogenic sea level signalHowever, by studying “sea level spatial trend patterns in the tropical Pacific and attempting to eliminate signal corresponding to the main internal climate mode, we show that the remaining residual sea level trend pattern does not correspond to externally forced anthropogenic sea level signal.”

Another group of scientists led by Mohammad Hadi Bordbar from the Helmholtz Centre for Ocean Researchin Kiel, Germany also concluded in a study published in April that the recent sea level trends in the tropical Pacific “are still within the range of long-term internal decadal variability.

“Further, such variability strengthens in response to enhanced greenhouse gas concentrations, which may further hinder detection of anthropogenic climate signals in that region,” the study found.

In another study also published in April, a research team led by Sonke Dangendorf of the Research Institute for Water and Environment at the University of Siegen, Germany said that “superimposed on any anthropogenic trend there are also considerable decadal to centennial signals linked to intrinsic natural variability in the climate system… In the Arctic, for instance, the casual uncertainties are even up to 8 times larger than previously thought.

“This result is consistent with recent findings that beside the anthropogenic signature, a non-negligible fraction of the observed 20^th century sea level rise still represents a response to pre-industrial natural climate variations such as the Little Ice Age” – a period of low temperatures which occurred between 1300 and 1850.

In a fourth paper published online in January in the Journal of Coastal Research, lead author Jens Morten Hansen of the Geological Survey of Denmark and Greenland and his co-authors studied sea level patterns from the eastern North Sea to the central Baltic Sea over a 160-year period (1849-2009).

“Identification of oscillators and general trends over 160 years would be of great importance for distinguishing long-term, natural developments from possible, more recent anthropogenic sea-level changes,” the researchers note.

“However, we found that a possible candidate for such anthropogenic development, i.e. the large sea-level rise after 1970, is completely contained by the found small residuals, long-term oscillators, and general trend. Thus, we found that there is (yet) no observable sea-level effect of anthropogenic global warming in the world’s best recorded region.”

In addition, the Earth’s coasts actually gained land over the past 30 years, according to another study published August 25 in Nature Climate Change.

Researchers led by Gennadii Donchyts from the Deltares Research Institute in the Netherlands found that the Earth’s surface gained a total of 58,000 square kilometers (22,393 square miles) of land over the past 30 years, including 33,700 sq. km. (13,000 sq. mi.) in coastal areas.

“We expected that the coast would start to retreat due to sea level rise, but the most surprising thing is that the coasts are growing all over the world,” study co-author Fedor Baart told the BBC.

“We were able to create more land than sea level rising was taking.”

Barbara Hollingsworth

Bio | Archive

Organisms May be Quantum Machines

Published on September 16, 2016

Written by Martha Henriques

If there’s any subject that perfectly encapsulates the idea that science is hard to understand, it’s quantum physics. Scientists tell us that the miniature denizens of the quantum realm behave in seemingly impossible ways: they can exist in two places at once, or disappear and reappear somewhere else instantly.

The one saving grace is that these truly bizarre quantum behaviours don’t seem to have much of an impact on the macroscopic world as we know it, where “classical” physics rules the roost.

Or, at least, that’s what scientists thought until a few years ago.

Arctic Ice Growing Rapidly

Published on September 16, 2016

Written by Paul Homewood

http://ocean.dmi.dk/arctic/icecover.uk.php

It is now safe to confirm that the minimum Arctic sea ice extent has now been passed this year, with an area of 4.083 million sq km on 7th September.

This is 22% greater than in 2012, despite two major storms in August that led to break up of ice.

The ice has been regrowing remarkably rapidly for the last week, and already stands above the start of the month. Tentatively, we may be seeing one of the fastest September growths on record.

”Climate Experts” Obsessed With CO2, Ignored Remaining Universe Of Factors

Published on September 16, 2016

Written by Pierre L. Gosselin

High profile German food chemist Udo Pollmer here at German public radio brings the following video to our attention.

In the video biologist and public speaker Allan Savory tells an audience how climate change and desertification has a lot more to do with the elimination of roaming herd animals over grasslands and vegetated areas over the 20th century.

Another tragedy of consensus science

Tragically, it used to be consensus science that the desertification of vast areas of land on all continents was caused by the over-grazing by herds of animals. As they chomped on the vegetation and moved on, they left the soil barren and exposed to evaporation and wind erosion. Animals that had lived there for thousands of years were suddenly deemed by consensus science to be the culprits.

Unprecedented atmospheric disruption of a most regular climate cycle

Published on September 14, 2016

Written by Natural Environment Research Council

Wind over the ocean. An unexpected change in wind direction has been caused by atmospheric waves in the Northern Hemisphere.

The normal flow of air high up in the atmosphere over the equator, known as the quasi-biennial oscillation, was seen to break down earlier this year. These stratospheric winds are found high above the tropics, their direction and strength changes in a regular two- to three-year cycle which provides forecasters with an indication of the weather to expect in Northern Europe. Westerly winds are known to increase the chance of warm and wet conditions, while easterlies bring drier and colder weather.

How our brain slows down the effects of aging

Published on September 14, 2016

Written by Ruhr-Universitaet-Bochum

Older people pay more attention to the details and look more closely than younger people.

The older we get, the more difficult it becomes to put the world around us in order. Yet, our brain develops remarkable strategies to slow down the effects of aging.

In order to process the information that we receive every day, we build categories into which we sort everything that makes up the world around us. Neuroscientists from Ruhr-Universität Bochum (RUB) found out: the way we categorise things changes throughout our lifetimes. Their research results were now published in the journal Neuropsychologia.

The team surrounding Sabrina Schenk and Prof. Dr. Boris Suchan observed young and older people during a categorisation task. The participants of the study were asked to sort circles with varying colour combinations into one of two categories. Some of the circles were very similar to each other; others were distinctly different. To which category the circles belonged was indicated by a feedback during the test.

Brain waves and gaze direction offer insights

The scientists not only documented the test subjects’ answers, they also recorded their brain waves via an EEG and used an eye tracker to trace their line of vision. The results showed that both young and older subjects had no difficulties categorising the similar looking circles — the learning mechanism of both groups were comparable. It was only in the later stages of the experiment, when distinct looking circles where shown, that differences between the test groups became apparent. Older subjects found it more difficult to categorise these exceptions than their younger counterparts.

Brain compensates with attentiveness

“There are two main strategies which we use to categorise things. While we perceive similar looking members of a category holistically, we must specifically learn exceptions and memorise them,” Schenk explains. “Older people find it harder to switch from one strategy to the other.” But measurements of brain waves also showed that the elderly develop a particular selective attentiveness.

To put it simply: they pay more attention to the details and look more closely than younger people. This is also confirmed by the eye tracker, which records in which direction the participants are looking. “To a certain extent, the brain is able to slow down negative effects of aging by increasing its level of attentiveness,” summarises Schenk.

Further studies with gamers

A computer simulation at Canada’s University of Western Ontario has confirmed the results of the scientists in Bochum. In a next step the RUB team would like to test people whose attention level has been especially trained, like that of avid computer players. If these gamers do particularly well in the categorisation task, then the results may help the elderly specifically train their attentiveness.

Story Source:

The above post is reprinted from materials provided by Ruhr-Universitaet-Bochum. Note: Content may be edited for style and length.

Journal Reference:

Sabrina Schenk, John P. Minda, Robert K. Lech, Boris Suchan. Out of sight, out of mind: Categorization learning and normal aging. Neuropsychologia, 2016; 91: 222 DOI: 10.1016/j.neuropsychologia.2016.08.013

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