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More facts against the Mann – ‘late 20th century warming has not been unique within…the past 750 years ‘



http://wattsupwiththat.com/2015/09/25/more-facts-against-the-mann-late-20th-century-warming-has-not-been-unique-within-the-past-750-years/

https://www.blogs.uni-mainz.de/fb09climatology/files/2012/03/Esper_2015_Geochron.pdf
"America will never be destroyed from the outside,
if we falter and lose our freedoms,
it will be because we destroyed ourselves."
Abraham Lincoln

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I like this from the second link

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Received 28 July 2014

Accepted 6 February 2015

Abstract: Substantial effort has recently been put into the development of climate reconstructions
from tree-ring stable carbon isotopes, though the interpretation of long-term trends retained in such
timeseries remains challenging. Here we use detrended δ13C measurements in Pinus uncinata treerings,
from the Spanish Pyrenees, to reconstruct decadal variations in summer temperature back to the
13th century. The June-August temperature signal of this reconstruction is attributed using decadally
as well as annually resolved, 20th century δ13C data. Results indicate that late 20th century warming
has not been unique within the context of the past 750 years. Our reconstruction contains greater amplitude
than previous reconstructions derived from traditional tree-ring density data, and describes
particularly cool conditions during the late 19th century. Some of these differences, including early
warm periods in the 14th and 17th centuries, have been retained via δ13C timeseries detrending — a
novel approach in tree-ring stable isotope chronology development. The overall reduced variance in
earlier studies points to an underestimation


"America will never be destroyed from the outside,
if we falter and lose our freedoms,
it will be because we destroyed ourselves."
Abraham Lincoln

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rushmc

Old news.....



You do not actually READ and comprehend anything from any source other than your Denier approved sites do you....:S

OLD NEWS.. Really????
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Indeed, last week we learned from the National Oceanic and Atmospheric Administration that the first eight months of 2015 were the hottest such stretch yet recorded for the globe’s surface land and oceans, based on temperature records going to 1880. It’s just the latest evidence that we are, indeed, on course for a record-breaking warm year in 2015.

Yet, if you look closely, there’s one part of the planet that is bucking the trend. In the North Atlantic Ocean south of Greenland and Iceland, the ocean surface has seen very cold temperatures for the past eight months. What’s up with that?




Indeed

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