Undersea volcanoes may be impacting long-term climate change
…EU scientists say Volcanoes, Asteroids are unimaginably worse than climate change
EU scientists say Volcanoes, Asteroids are unimaginably worse than climate change
Experts say that climate change is the worst threat we face, except for the worse ones. Scientists warn over super-volcano threat Experts at the European Science Foundation said volcanoes – especially super-volcanoes like the one at Yellowstone National Park, Wyoming, which has a caldera measuring 34 by 45 miles (55 by 72 km) – pose more threat to Earth and the survival of humans than asteroids, earthquakes, nuclear war and global warming. What could be worse than 1.5 degrees of warming? [After] … a major eruption, the team said, millions of people would die and earth’s atmosphere would be poisoned with ash and other toxins “beyond the imagination of anything man’s activity and global warming could do over 1,000 years. We are talking about an “extinction-level event”: Experts at the European Science Foundation said volcanoes – especially super-volcanoes like the one at Yellowstone National Park, Wyoming, which has a caldera measuring 34 by 45 miles (55 by 72 km) – pose more threat to Earth and the survival of humans than asteroids, earthquakes, nuclear war and global warming. But the UN and Obama will save us right? There are few real contingency […]Rating: 8.5/10 (4 votes cast)
— gReader Pro…
Number of volcanoes erupting right now greater than 20th century YEARLY average
…Analysis: ‘No Underlying Global Temperature Increase For 20 Years’
No Underlying Global Temperature Increase For 20 Years
By Paul Homewood I was reminded about a paper from last year, authored by Ben Santer amongst others, Volcanic contribution to decadal changes in tropospheric temperature. The paper looked at recent temperature trends in the lower troposphere, and attempted to isolate the effect of volcanoes and ENSO changes. ABSTRACT Despite continued growth in atmospheric levels of greenhouse gases, global mean surface and tropospheric temperatures have shown slower warming since 1998 than previously1, 2, 3, 4, 5. Possible explanations for the slow-down include internal climate variability3, 4, 6, 7, external cooling influences1, 2, 4, 8, 9, 10, 11 and observational errors12, 13. Several recent modelling studies have examined the contribution of early twenty-first-century volcanic eruptions1, 2, 4, 8 to the muted surface warming. Here we present a detailed analysis of the impact of recent volcanic forcing on tropospheric temperature, based on observations as well as climate model simulations. We identify statistically significant correlations between observations of stratospheric aerosol optical depth and satellite-based estimates of both tropospheric temperature and short-wave fluxes at the top of the atmosphere. We show that climate model simulations without the effects of early twenty-first-century volcanic eruptions overestimate the tropospheric warming observed since 1998. In two simulations with more realistic volcanic influences following the 1991 Pinatubo eruption, differences between simulated and observed tropospheric temperature trends over the period 1998 to 2012 are up to 15% smaller, with large uncertainties in the magnitude of the effect. To reduce these uncertainties, better observations of eruption-specific properties of volcanic aerosols are needed, as well as improved representation of these eruption-specific properties in climate model simulations. http://www.nature.com/ngeo/journal/v7/n3/full/ngeo2098.html Ignore the misdirection about early twenty-first-century volcanic eruptions. What the paper addresses are the El Chichon and Pinatubo eruptions of 1982 and 1991 respectively, generally reckoned to be the two biggest eruptions, in terms of stratospheric input, of the last century. Santer’s charts below show the raw data, after adjusting for ENSO, and finally adjusting for the volcanic eruptions as well. Note that the black line represents the average of the models. After taking out the effect of ENSO and eruptions, it is apparent that temperatures have been flat since the early 1990’s; indeed they have arguably been falling since. This is significant. We are often told that the 17-year pause, with which we are all familiar, is solely dependent on cherry picking the big El …
Inconvenient study: Seafloor volcano pulses may alter climate – models may be wrong
Inconvenient study: Seafloor volcano pulses may alter climate – models may be wrong
New data show strikingly regular patterns, from weeks to eons From The Earth Institute at Columbia University: 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 […]
— gReader Pro…
Which is it? Time Mag. goes both ways on volcanoes! TIME Mag.: ‘Climate Change Leads to Volcanoes’ – OR Flashback Time Mag 2014: ‘Volcanoes May Be Slowing Down Climate Change’
…Which is it? Time Mag. goes both ways on volcanoes! TIME Mag.: ‘Climate Change Leads to Volcanoes (Really)’ – Rebuttal: Study: Volcanoes ARE cooling Earth – So AGW causes more volcanoes which cool the Earth?!
http://time.com/3687893/volcanoes-climate-change/ If you enjoyed that, there’s more of the same coming. At the current pace, the researchers predict, the uplift rate in parts of Iceland will rise to 15.7 in (40 mm) per year by the middle of the next decade, liberating more calderas and leading to one Eyjafjallajökull-scale blow every seven years. The Earth, we are learning yet again, demands respect. Mess with it and there’s no end to the problems you create. If you enjoyed that, there’s more of the same coming. At the current pace, the researchers predict, the uplift rate in parts of Iceland will rise to 15.7 in (40 mm) per year by the middle of the next decade, liberating more calderas and leading to one Eyjafjallajökull-scale blow every seven years. The Earth, we are learning yet again, demands respect. Mess with it and there’s no end to the problems you create. Perhaps anticipating the climate change deniers’ uncanny ability to put two and two together and come up with five, the researchers took pains to point out that no, it’s not the very fact that Icelandic ice sits above hot magma deposits that’s causing the glacial melting. The magma’s always been there; it’s the rising global temperature that’s new. At best, only 5% of the accelerated melting is geological in origin.…
New excuse #56 for the ‘pause’ in global warming: Satellites underestimate cooling from volcanic aerosols – Published in Geophysical Research Letters
…New paper finds West Antarctic glacier likely melting from geothermal heat below from volcanoes – Published in Earth and Planetary Science Letters
New paper finds West Antarctic glacier likely melting from geothermal heat below
http://hockeyschtick.blogspot.com/2014/10/new-paper-finds-west-antarctic-glacier.html
A paper published today in Earth and Planetary Science Letters finds evidence that one of the largest glaciers in West Antarctica, the Thwaites Glacier, is primarily melting from below due to geothermal heat flux from volcanoes located along the West Antarctic Volcanic Rift System, not due to man-made CO2. CAGW proponents have alleged that West Antarctic glaciers such as such as the Thwaites Glacier and the neighboring Pine Island Glacier are rapidly melting due to man-made greenhouse gases and/or ocean heating, despite observations showing the air temperature in the Antarctic hasn’t risen since 1979, Antarctic sea surface temperatures have fallen since 2006, and ARGO ocean heat content of the Southern Ocean shows no increase at any level of the top 2000 meters since the system was put in place in 2004. The authors find the neighboring Pine Island Glacier also overlies the same volcanic rift system and thus may also be melting from geothermal heat below. The West Antarctic Volcanic Rift System is illustrated by JoNova below, and just so happens to correspond to the areas of notable glacier melt and alleged warming. In contrast, East Antarctica, which holds 80% of Antarctic ice mass and does not have any known underlying volcanoes, is significantly increasing in ice mass. The paper joins several others finding geothermal heat largely if not entirely responsible for glacier melt in multiple locations in both Antarctica and Greenland, i.e. not anthropogenic. Excerpts from post “The “pause” of global sea ice. Up by ~76% in 2013 & 2014 from the 2007-2012 minima”: The air temperature in the Antarctic hasn’t risen since 1979: And Antarctic sea surface temperature has fallen since 2006, which would explain the extra sea ice: And if we look at ARGO OHC measurements in the Antarctic we see there is no warming at any level in the ocean: Variable crustal thickness beneath Thwaites Glacier revealed from airborne gravimetry, possible implications for geothermal heat flux in West Antarctica Theresa M. Damiania, , , Tom A. Jordanb, , Fausto Ferracciolib, , Duncan A. Youngc, , Donald D. Blankenshipc • The Byrd Subglacial Basin beneath Thwaites Glacier is part of Mesozoic widespread rifting. • Thin crust (18–24 km) exists in eastern Marie Byrd Land and beneath Thwaites Glacier. • Gravity evidence supports hypothesis of warm mantle beneath Marie Byrd Land. • Supports the use …