Tag Archives: Holocene

Those who don’t learn from Yamal, are condemned to repeat it – Marcott’s YAD061

Posted on April 11, 2013 by

You’d think academics in the upside down Mann climate proxy world would pay attention, and not repeat the same mistakes of the past. Apparently not. WUWT readers surely recall the Yamal YAD06 (The most influential tree in the world) and … Continue reading →

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Posted in Marcott et al proxy paper | Tagged , , , , , , | 73 Comments

Evidence for a Global Medieval Warm Period

Posted on April 11, 2013 by

From CO2Science: Medieval Warm Period (Antarctica) — Summary Was there a Medieval Warm Period somewhere in the world in addition to the area surrounding the North Atlantic Ocean, where its occurrence is uncontested? This question is of utmost importance to … Continue reading →

Posted in Antarctic, Little Ice Age, MedievalWarmPeriod | Tagged , , , , , , , | 74 Comments

Marcott issues a FAQ on their paper

Posted on March 31, 2013 by

This is from Real Climate, who played the “he who must not be named” game again in not pointing out criticisms. Gavin dissapoints. UPDATE: McIntyre responded earlier today with The Marcott Filibuster Marcott et al have posted their long-promised FAQ at … Continue reading →

Posted in Marcott et al proxy paper | Tagged , | 60 Comments

Where’s the hockey stick? The ‘Marcott 9′ show no warming past 1950

Posted on March 26, 2013 by

More on the Marcott et al “hockey stick”. All of the ‘Marcott 9′ had altered dates. Guest post by John Kehr While it took me a while to get the time together to write an article about the Marcott paper, … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , | 120 Comments

Marcott’s uptick – a result of proxy sign inconsistency

Posted on March 16, 2013 by

Shades of upside down Tiljander. McIntyre is delving further into the Marcott proxy issue and it looks almost certain now there’s a statistical processing error (selection bias). Steve McIntyre writes: In the graphic below, I’ve plotted Marcott’s NHX reconstruction against … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , | 56 Comments

Tick, tick, tick – how long will the new Marcott et al hockey stick survive?

Posted on March 15, 2013 by

Steve McIntyre writes of the curious uptick in the 20th century, which doesn’t seem to be rooted in reality, or to have been in Marcott’s PhD thesis: While one expects a difference between NHX and SHX in the Holocene, the … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , , | 53 Comments

Another Hockey Stick?

Posted on March 14, 2013 by

Guest post by S. Fred Singer Green forces, eager to promote their theories of global warming, appear to be practicing intellectual recycling.  Is this the return of the notorious hockeystick – which, in 2001, was the central dogma of Anthropogenic … Continue reading →

Posted in Marcott et al proxy paper | Tagged , , | 37 Comments

Marcott’s proxies – 10% fail their own criteria for inclusion

Posted on March 13, 2013 by

Note: Steve McIntyre is also quite baffled by the Marcott et al paper, finding it currently unreproducible given the current information available. I’ve added some comments from him at the bottom of this post – Anthony Guest Post by Willis … Continue reading →

Posted in Proxies | Tagged , , , , , , | 128 Comments

Validity of Marcott et al. PART II

Posted on March 13, 2013 by

Validity of Marcott et al. contention that “Global temperatures are warmer than at any time in at least 4,000 years” and “Global temperature….. has risen from near the coldest to the warmest levels of the Holocene within the past century.” … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , , , , | 80 Comments

A Simple Test of Marcott et al., 2013

Posted on March 11, 2013 by

Guest Post by David Middleton The Gorebots are all atwitter about this new paper… Science 8 March 2013: Vol. 339 no. 6124 pp. 1198-1201 DOI: 10.1126/science.1228026 A Reconstruction of Regional and Global Temperature for the Past 11,300 Years Shaun A. … Continue reading →

Posted in Alarmism, Marcott et al proxy paper, Michael E. Mann, Paleoclimatology | Tagged , , | 91 Comments

Validity of “A Reconstruction of Regional and Global Temperature for the Past 11,300 Years”

Posted on March 11, 2013 by

It seems that Marcott et al isn’t all that it is cracked up to be. Dr. Easterbrook takes a good hard look at the paper. Guest post by Dr. Don J. Easterbrook (Note: Because of the far-reaching implications of the … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , | 97 Comments

Marcott et al claim of ‘unprecedented’ warming compared to GISP ice core data

Posted on March 8, 2013 by

The very first sentence of the Marcott et al (which is getting heavy press) abstract says: Surface temperature reconstructions of the past 1500 years suggest that recent warming is unprecedented in that time. Okay, let’s have a look at the … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , , | 116 Comments

New study: Ocean-driven warming along the western Antarctic Peninsula needs to be considered as part of a natural centennial timescale cycle of climate variability

Posted on January 23, 2013 by

From Cardiff University: Tiny fossils hold answers to big questions on climate change Research explores 12,000 year fossil record The western Antarctic Peninsula is one of the fastest warming regions on the planet, and the fastest warming part of the … Continue reading →

Posted in Antarctic, ENSO | Tagged , , , , , , , | 23 Comments

Now if we could only get them to stop using the “D” word, they might actually communicate better

Posted on January 22, 2013 by

From the University of Missouri: Public Acceptance of Climate Change Affected by Word Usage, Says MU Anthropologist Better science communication could lead to a more informed American public. Public acceptance of climate change’s reality may have been influenced by the … Continue reading →

Posted in Climate News | Tagged , , , , , , , | 100 Comments

New paper demonstrates that climate responds to short and long-term changes in solar activity

Posted on January 2, 2013 by

(Via the Hockey Schtick) A new peer reviewed paper published in The Holocene finds a significant link between solar activity and climate over the past 1000 years. According to the authors: “Our results suggest that the climate responds to both … Continue reading →

Posted in Solar | Tagged , , , | 143 Comments

On certainty: Truth is the Daughter of Time

Posted on December 3, 2012 by

This comment from Dr. Robert Brown at Duke University is elevated from a comment to a full post for further discussion. Since we have a new paper (Shepherd et al) that is being touted in the media as “certain” using … Continue reading →

Posted in Climate data, Uncertainty | Tagged , , , , , , , | 191 Comments

Claim: Five climate-forcing mechanisms govern 20,000 years of climate change

Posted on October 12, 2012 by

FOREWORD: I don’t agree with many of the claims made in this paper, particularly the retrograde tri-synodic Jupiter/Saturn cycle claims. This is not a peer reviewed paper. That said, I’m willing to allow discussion of it, so be skeptical of these … Continue reading →

Posted in Cosmic rays, Modeling, Paleoclimatology, Solar | Tagged , , , , | 347 Comments

Can we predict the duration of an interglacial?

Posted on October 2, 2012 by

Perspective by William McClenney on the paper of the same title by: P. C. Tzedakis, E.W. Wolff, L. C. Skinner, V. Brovkin, D. A. Hodell, J. F. McManus, and D. Raynaud http://www.clim-past.net/8/1473/2012/cp-8-1473-2012.pdf I can often be heard, when assailed by … Continue reading →

Posted in Glaciers | Tagged , , , , | 74 Comments

Onset of the Next Glaciation

Posted on September 16, 2012 by

Guest post by David Archibald Baby boomers like me have enjoyed the most benign period in human history. The superpower nuclear standoff gave us fifty years of relative peace, we had cheap energy from inherent over-supply of oil, grain supply … Continue reading →

Posted in Glaciers, Global cooling | Tagged , , , | 335 Comments

F10.7 Flux, Sea Level and the Holocene

Posted on September 15, 2012 by

Guest post by David Archibald George Orwell said,” He who controls the present, controls the past. He who controls the past, controls the future.” Some amongst us have used that as an instruction manual and have attempted to create confusion … Continue reading →

Posted in Sea level, Solar | Tagged , , | 163 Comments