Thursday, August 14, 2014

From the Nongovernmental International Panel on Climate Change

Climate Change Reconsidered
 
Crops vs. Weeds at the Northern Edges of Their Current Ranges (5 Aug 2014)
Climate alarmists project weeds will increase. Experimental results indicate otherwise, deflating yet another one of the global warming scare stories...
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Simulations of Mediterranean and Northern Africa Precipitation (5 Aug 2014)
According to the authors of this study, "the failure [of present-day state-of-the-art climate models] to simulate observed mid-Holocene changes in the north African monsoon and the potentially linked failure to simulate the observed shift in rainfall seasonality in the Mediterranean raises concerns about the reliability of model projections of future climates in these regions." We could not agree more and policy makers would be wise to take note...
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Carbon-Nitrogen Cycle Models of Forest Responses to Elevated CO2 (5 Aug 2014)
How well do they represent reality? Not very, as "most models failed to simulate the sustained net primary production enhancement at the Duke FACE site," leaving the 23 researchers from 7 different countries who conducted this study to conclude "this tendency to underestimate the net transfer of N from soils to vegetation under elevated CO2 at Duke calls for a better representation of below-ground processes, in particular root allocation and microbial responses to enhanced rhizodeposition." How true that is...
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Can Earth's Two Hemispheres Get Their Climatic Act Together? (5 Aug 2014)
A new study reveals important differences between them that lead the authors of this study to conclude that "climate system predictability on decadal to century timescales may be lower than expected based on assessments of external climate forcing and Northern Hemisphere temperature variations alone." And in the final paragraph of the body of their paper, they state that the strong inter-hemispheric coupling in the climate model simulations they conducted "suggests that models overestimate the strength of externally-forced relative to internal climate system variability, therefore implying more limited predictability not only on regional but also hemispheric scales"...
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Millennial-Scale Climate Variability During the Holocene (6 Aug 2014)
In the case of the most recent phase of Holocene millennial-scale climate variability - i.e., the Little Ice Age-to-Current Warm Period warming - we must also consider the likelihood that it, too, may have been driven by the very same force or forces that were responsible for all of the many other episodes of millennial-scale climate change of the Holocene, which were clearly not driven by changes in the air's CO2 content...
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A Real-Life Non-Calcifying Anthozoan-Symbiodinium Symbiosis (6 Aug 2014)
Several marine species inhabit highly heterogeneous environments, such as intertidal habitats, and "have evolved the ability to exhibit high levels of physiological plasticity," which is "the mechanism whereby organisms alter their physiology enabling them to persist in new environmental conditions (i.e. phenotypic plasticity), including decreased pH" as illustrated in this study of sea anemones...
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The Modeling of Low-Frequency Rainfall Variability (6 Aug 2014)
How close do general circulation models come to matching what is observed in nature? As has been found to be the case in so many other studies of the integrity of state-of-the-art climate models, the findings of this new study clearly indicate that current GCMs are not yet up to the task of reliably representing low-frequency rainfall variability...
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Woody Plant Encroachment on the USA's Southwestern Desert (12 Aug 2014)
The historical increase in the air's CO2 content has been fostering a great greening of previously not-so-green portions of the Earth...
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A 3,000-Year Record of Solar Activity (12 Aug 2014)
How unique is the modern Grand maximum which occurred during solar cycles 19-23, i.e., 1950-2009? According to the authors of this study it was "a rare or even unique event, in both magnitude and duration, in the past three millennia"...
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The Likely Fate of Sea Stars in an Acidifying and Warming Ocean (12 Aug 2014)
It appears they and other stress tolerant intertidal species have pre-adaptive traits that "will convey resilience to near-future ocean change." Such findings are in stark contrast to the scary predictions offered up by climate alarmists about so-called "ocean acidification"...
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CMIP5 Climate Model Biases (12 Aug 2014)
The world's climate modelers still have a long and winding road to travel, in order to get to the point where they, or anyone else, can place any real confidence in their "simulations, predictions and projections"...
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Could Earth's Coral Reefs Adapt to Any Future Global Warming? (13 Aug 2014)
A new study suggests they probably will, as experimental analysis of corals shows "both short-term acclimatory and longer-term adaptive acquisition of climate resistance" that allows them to inhabit reef areas with water temperatures "far above their expected tolerances"...
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Antarctic Sea Ice Trends of the Southern Ocean (13 Aug 2014)
Do they pose a problem for CMIP5 climate models? Yes, the models "overestimate the strength of externally-forced [i.e., anthropogenic] relative to internal climate system variability, therefore implying more limited predictability not only on regional but also hemispheric scales," which conclusion is confirmed by the work of present study...
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The Climate Envelope Concept Is Not Applicable to the Real World (13 Aug 2014)
The simplistic concept is simply too simplistic, as the present study "adds to growing empirical evidence that physiological traits that determine a species' sensitivity to environmental stress vary in a complex manner across its distributional range"...
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