Wednesday, November 14, 2012

New paper finds the highest storm activity is associated with global cooling periods




(http://hockeyschtick.blogspot.in) A new paper published in Nature Geoscience examines climate change over the past 11,500 years and finds, contrary to the claims of climate alarmists, that the highest storm activity is associated with cold periods. According to the authors,
"We find that high storm activity occurred periodically with a frequency of about 1,500 years, closely related to cold and windy periods." The paper adds to several others showing that global warming decreases storm activity and extreme weather.    

Nature Geoscience  (2012) 
doi:10.1038/ngeo1619

Received 
03 August 2012

Accepted 
04 October 2012 

Published online 
11 November 2012
Considerable climatic variability on decadal to millennial timescales has been documented for the past 11,500 years of interglacial climate. This variability has been particularly pronounced at a frequency of about 1,500 years, with repeated cold intervals in the North Atlantic However, there is growing evidence that these oscillations originate from a cluster of different spectral signaturs, ranging from a 2,500-year cycle throughout the period to a 1,000-year cycle during the earliest millennia. Here we present a reappraisal of high-energy estuarine and coastal sedimentary records from the southern coast of the English Channel, and report evidence for five distinct periods during the Holocene when storminess was enhanced during the past 6,500 years.

We find that high storm activity occurred periodically with a frequency of about 1,500 years, closely related to cold and windy periods diagnosed earlier. We show that millennial-scale storm extremes in northern Europe are phase-locked with the period of internal ocean variability in the North Atlantic of about 1,500 years. However, no consistent correlation emerges between spectral maxima in records of storminess and solar irradiation. We conclude that solar activity changes are unlikely to be a primary forcing mechanism of millennial-scale variability in storminess.

1 comment:

  1. Paraphrasing Richard Feynman: Regardless of how many experts believe it or how many organizations concur, if it doesn’t agree with observation, it’s wrong.

    The IPCC, some politicians and many others stubbornly continue to proclaim that increased atmospheric carbon dioxide was the primary cause of global warming. Measurements demonstrate that they are wrong.

    The average global temperature trend has been flat since 2001. No amount of spin can rationalize that the temperature increase to 2001 was caused by CO2 increase but that 25.9% additional CO2 increase had no effect on the average global temperature trend after 2001.

    Without human caused global warming there can be no human caused climate change.

    Average GLOBAL temperature anomalies are reported on the web by NOAA, GISS, Hadley, RSS, and UAH, all of which are government agencies. The first three all draw from the same data base of surface measurement data. The last two draw from the data base of satellite measurements. Each agency processes the data slightly differently from the others. Each believes that their way is most accurate. To avoid bias, I average all five. The averages are listed here.

    2001 0.3473
    2002 0.4278
    2003 0.4245
    2004 0.3641
    2005 0.4663
    2006 0.3930
    2007 0.4030
    2008 0.2598
    2009 0.4022
    2010 0.5298
    2011 0.3316

    A straight line (trend line) fit to these data has no slope. That means that, for over a decade, average global temperature has not changed. If the average thru September, 2012 (0.3526) is included, the slope is down.

    See, with 88% accuracy, what really caused the warm up during the 20th century and what caused it to stop warming at http://climaterealists.com/index.php?tid=145&linkbox=true

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