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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (1003092)

3/1/2017 1:06:25 PM

From: Brumar89

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TideGlider

Respond to of 1572677

A new temperature record from China gives no hint of any recent warming that can be attributed to atmospheric CO2

But medieval warm period observed

A 2000-Year Temperature History of China's Animaqin Mountains

Paper Reviewed: Chen, F., Zhang, Y., Shao, X., Li, M.Q. and Yin, Z.-Y. 2016. "A 2000-year temperature reconstruction in the Animaqin Mountains of the Tibet Plateau, China". The Holocene 26: 1904-1913.

Introducing their study, Chen et al. (2016) write that "high-resolution temperature reconstruction for the past 2000 years is imperative for understanding long-term natural climate variations and for estimating anthropogenic influence on the climate system." And, therefore, they developed an even longer April-June 2665-year tree-ring width chronology based on April-June maximum temperatures recorded at four meteorological stations located near Qilian juniper trees growing near the upper tree-line of the Animaqin Mountains on the eastern Tibetan Plateau.

And what did they learn by so doing?

As illustrated in the accompanying figure below, the four researchers report that "the warmest period occurred in AD 890-947, that "the coldest period occurred in AD 351-483," that "no obvious warming trend since the industrial revolution was observed," that "the mean of the most recent 50 years was only slightly higher than that of the whole series," and that it "has not yet reached the high values attained earlier."

In addition, Chen et al. note "the results of wavelet analysis showed the occurrence of significant quasi-periodic patterns at a number of occurring periods (2-8 years, 20-30 years, 30-60 years, and 60-130 years," as well as "some long-term periods (more than 200 years)," which they say were "consistent with those associated with ENSO [El Nino Southern Oscillation], PDO [the Pacific Decadal Oscillation], and solar activity."

Last of all, the five researchers report that "the warmest period was from AD 890 to 947, as opposed to the recent period," which finding implies that there has been nothing unusual, unnatural or unprecedented about the Animaqin Mountains' recent thermal history.

co2science.org

Peer reviewed science! The medieval warm period was warmer than now and was worldwide.

To: Brumar89 who wrote (1003092)	3/1/2017 1:09:48 PM
From: Heywood40	Read Replies (1) \| Respond to of 1572677

Drumpf spends more time doing his hair than getting security briefings.