WATTS' WEATHER UNDERGROUND

WATTS' LATEST CROP OF ALTERNATIVE  CLIMATE FACTS ARE ARRIVED AT BY IGNORING BOTH  THE TITLE, WHICH CITES  GREENHOUSE GAS  FORCING -  
AND  THE CONCLUSIONS- OF  THE NATURE GEOSCIENCE  ARTICLE UPON WHICH HE SUPPOSEDLY REPORTS:

Contradicting consensus climate science: Study suggests ‘continual warming over the past 11,000 years’

Anthony Watts / 2 hours ago 

From the “settled science” department:

UNLV Geoscience Ph.D. student Jonathan Baker has found evidence that shows nearly continuous warming from the end of the last Ice Age to the present in the Ural Mountains in central Russia.

The research, which was published today in top geoscience journal Nature Geoscience, shows continual warming over the past 11,000 years, contradicting the current belief that northern hemisphere temperatures peaked 6,000 to 8,000 years ago and cooled until the pre-Industrial period.

ALAS FOR WUWT DISINFORMATEES, OSTENSIBLE JOURNALISTS INCLUDED, THE AUTHORS  WERE  NOT  WRITING  ABOUT  CLIMATE  AND   GLOBAL SURFACE TEMPERATURES,  BUT  WHAT  HAPPENED  DEEP   INSIDE  A  CAVE  IN  THE  INTERIOR  OF  SIBERIA:

NATURE GEOSCIENCE | ARTICLE

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Holocene warming in western continental Eurasia driven by glacial retreat and greenhouse forcing

• Jonathan L. Baker,
• Matthew S. Lachniet,
• Olga Chervyatsova,
• Yemane Asmerom
• & Victor J. Polyak

• Affiliations
• Contributions
• Corresponding author

doi:10.1038/ngeo2953

Received

 

16 January 2017 

Accepted

 

18 April 2017 

Published online

 

22 May 2017

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Abstract

• Abstract• 
• References• 
• Author information• 
• Supplementary information

The global temperature evolution during the Holocene is poorly known. Whereas proxy data suggest that warm conditions prevailed in the Early to mid-Holocene with subsequent cooling, model reconstructions show long-term warming associated with ice-sheet retreat and rising greenhouse gas concentrations. One reason for this contradiction could be the under-representation of indicators for winter climate in current global proxy reconstructions. Here we present records of carbon and oxygen isotopes from two U–Th-dated stalagmites from Kinderlinskaya Cave in the southern Ural Mountains that document warming during the winter season from 11,700 years ago to the present. Our data are in line with the global Holocene temperature evolution reconstructed from transient model simulations. We interpret Eurasian winter warming during the Holocene as a response to the retreat of Northern Hemisphere ice sheets until about 7,000 years ago, and to rising atmospheric greenhouse gas concentrations and winter insolation thereafter. We attribute negative δ¹⁸O anomalies 11,000 and 8,200 years ago to enhanced meltwater forcing of North Atlantic Ocean circulation, and a rapid decline of δ¹³C during the Early Holocene with stabilization after about 10,000 years ago to afforestation at our study site. We conclude that winter climate dynamics dominated Holocene temperature evolution in the continental interior of Eurasia, in contrast to regions more proximal to the ocean.