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Written by Rick C. Hodgin, TGDaily
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Friday, 31 October 2008 |
Underwater methane plume
Boston (MA) - Scientists at MIT have recorded a nearly
simultaneous world-wide increase in methane levels. This is the first
increase in ten years, and what baffles science is that this data
contradicts theories stating man is the primary source of increase for
this greenhouse gas. It takes about one full year for gases generated
in the highly industrial northern hemisphere to cycle through and reach
the southern hemisphere. However, since all worldwide levels rose
simultaneously throughout the same year, it is now believed this may be
part of a natural cycle in mother nature - and not the direct result of
man's contributions.
Methane - powerful greenhouse gas
The two lead authors of a paper published in this week's Geophysical
Review Letters, Matthew Rigby and Ronald Prinn, the TEPCO Professor of
Atmospheric Chemistry in MIT's Department of Earth, Atmospheric and
Planetary Science, state that as a result of the increase, several
million tons of new methane is present in the atmosphere.
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Written by Dennis Avery, Canada Free Press
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Tuesday, 28 October 2008 |
Alaska’s glaciers grew this year, after shrinking for most of the
last 200 years. The reason? Global temperatures dropped over the past
18 months. The global mean annual temperature has been declining
recently because the solar wind thrown out by the sun has retreated to
its smallest extent in at least 50 years. This temperature downturn was
not predicted by the global computer models, but had been predicted by the sunspot index since 2000.
The solar wind normally protects the earth from 90 percent of the
high-energy cosmic rays that flash constantly through the universe.
Henrik Svensmark at the Danish Space Research Institute has
demonstrated that when more cosmic rays hit the earth, they create more
of the low, wet clouds that deflect heat back into outer space. Thus
the earth’s recent cooling.
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Written by CO2 Science
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Tuesday, 28 October 2008 |
Below you'll find the latest journal reviews from CO2 Science . Check them out as each is a good read:
Tropical Cyclone Genesis: How is it affected by rising sea surface temperatures, according to a recently modified model?
Australian-Region Tropical Cyclone Characteristics: How have they varied over the last 3.5 decades?
Rapid Evolution of a Plant in Response to a Change in Climate: What life history traits were altered? ... and how rapid were the alterations?
The Carbon Balance of Old-Growth Forests: Is it positive, neutral or negative?
Leaf-Galls and Leaf-Mines of Mature Oak Trees: How are they affected by medium-term atmospheric CO2 enrichment?
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Written by Craig Loehle, PhD, World Climate Report
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Saturday, 25 October 2008 |
Tree rings are widely used for reconstructing climate and past
climates are critical for putting the current climate (including global
temperatures) into the proper perspective. Is current warming unusual?
Only a comparison to the past can tell.
To help gain a better understanding of the past and how global
temperatures may have behaved, researchers frequently try to extract
climate information that may be stored in the annual growth ring of
trees. The standard practice is to calibrate annual tree ring width
(and/or wood density) to the temperature under which the trees were
growing using a linear model based on recent (e.g., 20th
Century) data, and then interpret past rings widths as indicators of
temperature. A linear model is one in which a unit change in
temperature produces a corresponding unit change in the tree ring
attributes—and a linear model assumes that this relationship applies
over the entire range of temperatures.
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Written by Prof. Ian Plimer, Jennifer Marohasy's blog
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Friday, 24 October 2008 |
In response to a question concerning the likelihood of our oceans
becoming acidic from global warming Ian Plimer, University of Adelaide,
has replied:
THE oceans have remained alkaline during the
Phanerozoic (last 540 million years) except for a very brief and poorly
understood time 55 million years ago.
Rainwater (pH 5.6)
reacts with the most common minerals on Earth (feldspars) to produce
clays, this is an acid consuming reaction, alkali and alkaline earths
are leached into the oceans (which is why we have saline oceans),
silica is redeposited as cements in sediments, the reaction consumes
acid and is accelerated by temperature (see below).
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Written by Science and Public Policy Institute
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Thursday, 23 October 2008 |
This report provides a review of Alabama’s climate history and reveals
that there is no observational evidence of unusual long-term climate
changes taking place that could be linked to anthropogenic “global
warming” — despite scientifically unsupportable claims and frequent
prognostications of gloom and doom.
Instead of rising temperatures, the state’s annual average temperature has declined over the past century.
When the statewide average temperature history for Alabama is broken
down into the four seasons, it can be seen that the same general
patterns persist throughout the year. The warmest decades were
typically prior to the mid-20th century, and recent decades show
nothing unusual — fluctuating from year to year on either side of the
long-term average.
Instead of an increasing frequency of drought, the state’s moisture conditions have improved over the long run.
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Written by Brett Anderson, AccuWeather
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Monday, 20 October 2008 |
We still have a blank sun. Image from earlier today, courtesy of SOHO.
As you can see from the image above, the sun remains very inactive
in terms of sunspot activity. This has been a common image of the sun
for quite some time now.
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