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Melting of a major glacier system in western Antarctica may be caused by underwater volcanoes, and not by global climate change, according to new research.
Thwaites Glacier, a massive outlet for ice that empties into Pine Island Bay, is flowing at a rate of one-and-a-quarter miles per year. The bay opens up into the Amundsen Sea.
The Thwaites Glacier has been the subject of scrutiny by climatologists in the last few years, as new information about the severity of the melting becomes available. Traditional models had assumed heating from subterranean sources was fairly even around the region. New data provides details about areas where little was previously known.
University of Texas researchers studied how water moves underground in the region. They found liquid water was present in a greater number of sources than previously believed, and it is warmer than estimated in previous studies.
"It's the most complex thermal environment you might imagine. And then you plop the most critical, dynamically unstable ice sheet on planet Earth in the middle of this thing, and then you try to model it. It's virtually impossible," Don Blankenship, senior research scientist at the University of Texas, said.
...
originally posted by: onequestion
a reply to: eriktheawful
Hey I'm trying to understand your post a little here, I may be a little mentally challenged here so forgive me...
What exactly do you think is happening? I don't need evidence im just curious about your perspective.
doi:10.1016/j.quaint.2007.06.001
Copyright © 2007 Elsevier Ltd and INQUA All rights reserved.
Extreme Nile floods and famines in Medieval Egypt (AD 930–1500) and their climatic implications
References and further reading may be available for this article. To view references and further reading you must purchase this article.
Fekri A. Hassana,
aInstitute of Archaeology, University College London, 31-34 Gordon Square, WC1H 0PY, London, UK
Available online 7 June 2007.
Abstract
Nile gauge records of variations in Nile floods from the 9th century to the 15th century AD reveal pronounced episodes of low Nile and high Nile flood discharge. Historical data reveal that this period was also characterized by the worst known famines on record. Exploratory comparisons of variations in Nile flood discharge with high-resolution data on sea surface temperature of the North Atlantic climate from three case studies suggest that rainfall at the source of the Nile was influenced by the North Atlantic Oscillation. However, there are apparently flip-flop reversals from periods when variations in Nile flood discharge are positively related to North Atlantic warming to periods where the opposite takes place. The key transitions occur atAD 900, 1010, 1070, 1180, 1350 and 1400. The putative flip-flop junctures, which require further confirmation, appear to be quite rapid and some seem to have had dramatic effects on Nile flood discharge, especially if they recurred at short intervals, characteristic of the period from the 9th to the 14th century, coincident with the so-called Medieval Warm Period. The transition from one state to the other was characterized by incidents of low, high or a succession of both low and high extreme floods. The cluster of extreme floods was detrimental causing famines and economic disasters that are unmatched over the last 2000 years.
Late Holocene Environmental and Hydrologic Conditions in Northwestern Florida Derived from Seasonally Resolved Profiles of delta18O and Sr/Ca of Fossil Bivalves.
Elliot, M.; de Menocal, P. B.; Linsley, B. K.; Howe, S. S.; Guilderson, T.; Quitmyer, I. R.
American Geophysical Union, Fall Meeting 2002, abstract #PP72A-0429
...
The average annual and summer Sr/Ca of 4 fossil shells are higher than that of modern bivalves from the same location suggesting that annual coastal water temperatures were 3 to 4° C warmer than today. The bulk δ18O values show a marked trend towards more positive values. 24 fossil shells have bulk δ18O values 0.2permil to 0.7permil more positive than modern bivalves from the same location. These results suggest that the coastal waters off northwest Florida were warmer and less saline compared to today and attest of considerable differences of the regional climate and hydrological balance during the Medieval Warm Period and Roman Warm Period.
...
Oceanic Influences on Recent Continental Warming
GILBERT P. COMPO
PRASHANT D. SARDESHMUKH
Climate Diagnostics Center,
Cooperative Institute for Research in Environmental Sciences,
University of Colorado, and
Physical Sciences Division, Earth System Research Laboratory,
National Oceanic and Atmospheric Administration
325 Broadway R/PSD1
Boulder CO 80305-3328
[email protected]
(303) 497-6115
(303) 497-6449
Citation:
Compo, G.P., and P.D. Sardeshmukh, 2008: Oceanic influences on recent continental warming. Climate
Dynamics, doi: 10.1007/s00382-008-0448-9.
This article is published by Springer-Verlag. This author-created version is distributed courtesy of Springer-Verlag.
The original publication is available from www.springerlink.com at
www.springerlink.com...
Abstract
Evidence is presented that the recent worldwide land warming has occurred largely in response to a worldwide warming of the oceans rather than as a direct response to increasing greenhouse gases (GHGs) over land.
Atmospheric model simulations of the last half-century with prescribed observed ocean temperature changes, but without prescribed GHG changes, account for most of the land warming. The oceanic influence has occurred through hydrodynamic-radiative teleconnections, primarily by moistening and warming the air over land and increasing the downward longwave radiation at the surface. The oceans may themselves have warmed from a combination of natural and anthropogenic influences.
originally posted by: ElectricUniverse
a reply to: Rezlooper
We forgot, Rezlooper has lived so many lives on Earth that he should know what is normal and what isn't normal for Earth's climate...
Yes, the climate is changing... Tell me when has the climate NEVER changed...
Let's see...
Medieval Warm Period... warmer...
Roman Warm Period... Warmer...
Minoan Warm Period...warmer...
Here is the temperature reconstruction from GISP2 ice core data in Greenland for the past 4,000 years.
Those are some examples, there are many others like those. Yet according to some, "we are at unprecedented times"... "It's warmer now than EVER before"
Does anyone who subscribes to the Anthropogenic Global Warming false claims knows how many past civilizations have been displaced because of past climate changes? INCLUDING warming?,,, Anyone?...
i find it extremely telling how the Anthropogenic Global Warming doom pron brigade always ignore the fact that there are other changes happening on Earth such as the weakening magnetic field, which has been weakening even more rapidly since the beginning of 2014.
But of course, according to the AGW doom porn brigade "it's not possible that whatever is causing the changes to Earth's magnetic field could also be behind the climate changes"...
It's not like other planets in the solar system, and even the sun have been undergoing similar extreme changes right?.... right?....
Hey Electric, I'm not talking about past life times, I'm talking about the NOW!
originally posted by: onequestion
a reply to: Rezlooper
Hey Electric, I'm not talking about past life times, I'm talking about the NOW!
Thats a problem man because past data is all we really have to determining future outcomes. If you look at the past the weather is constantly changing in an oscillating pattern as we move through the galaxy/ universe the weather is always changing depending on our place in the greater universal engine.
Nature require balance so we can on some level use these variables to predict future outcomes.
...
Current warmth seems to be occurring nearly everywhere at the same time and is largest at high latitudes in the Northern Hemisphere. Over the last 50 years, the largest annual and seasonal warmings have occurred in Alaska, Siberia and the Antarctic Peninsula. Most ocean areas have warmed. Because these areas are remote and far away from major cities, it is clear to climatologists that the warming is not due to the influence of pollution from urban areas.