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Category Archives: paleoclimatology
Gradually heading to hell in a handbasket just as bad as instant doom
From the National Science Foundation: Global Extinction: Gradual Doom as Bad as Abrupt In “The Great Dying” 250 million years ago, the end came slowly The deadliest mass extinction of all took a long time to kill 90 percent of … Continue reading
Mann: Trees aren’t behaving like I want them to – volcanoes to blame
From Penn State Tree rings may underestimate climate response to volcanic eruptions Some climate cooling caused by past volcanic eruptions may not be evident in tree-ring reconstructions of temperature change because large enough temperature drops lead to greatly shortened or … Continue reading
New paper speculates on volcanoes during the Little Ice Age
From NCAR/UCAR, they’re still trying to stamp out solar influence as a potential cause of the Little Ice Age. One of the things I wonder about is that during low sunspot activity, does the reduced solar-magnetic influence have any effect … Continue reading
Frequency of strong Florida hurricanes decreased in last 600 years
The next time some alarmist caterwauls about hurricanes becoming worse and more frequent due to global warming, show them this study. Noting that “the brief observational record is inadequate for characterizing natural variability in hurricane activity occurring on longer than … Continue reading
Posted in hurricanes, paleoclimatology, weather
27 Comments
The Message in the Dye 3 Data
Guest post by David Archibald The story so far: in this recent post – Ap Index Neutrons and Climate, we had looked at the Dye 3 oxygen isotope-derived temperature record to see how big climate swings have been over the … Continue reading
Posted in climate data, glaciers, paleoclimatology
Tagged Central England Temperature, Dye 3, Finland, greenland, Medieval Warm Period, Roman Warm Period
95 Comments
The behind the scenes bumbling of the hockey stick
Mann oh Mann. Tom Nelson continues to wade through the 5000+ Climategate 2 emails. I’ve selected a few he’s highlighted in the vein of behind the scenes discussion of Dr. Michael Mann’s infamous “hockey stick” which claimed we were living … Continue reading
Mercury fingered in Permian-Triassic extinction
Hmmm. This sounds a bit like a sales pitch against “dirty coal” in support of the recent EPA Mercury ruling instead of regular geological research. I question this research claim because they only have evidence that there were spikes of … Continue reading
Paging Mike Mann – your dendrochronologist will see you now
Tom Nelson has another Climategate 2 email well worth reading Dendrochronologists get spanked by guy with expertise in tree physiology and wood anatomy ClimateGate Email 1738 “However, there are bounds to dendrochronology, as there are to every field of investigation, … Continue reading
Posted in Michael E. Mann, paleoclimatology, peer review, post-normal science
Tagged Age-Dating Techniques, Bristlecone pine, Climatic Research Unit email controversy, Dendrochronology, Earth Sciences, Intergovernmental Panel on Climate Change, Peer review, Quaternary Studies, Watts Up With That?
148 Comments
SST’s cooler now than in the Medieval Warming Period
From “The Hockey Schtick“, some inconvenient truth that breaks Mann’s already broken hockey stick into even smaller pieces. A new paper finds significant cooling of Atlantic Ocean over past millennium, making the MWP warmer in terms of sea surface temperature … Continue reading
In China, there are no hockey sticks
Reposted from Jo Nova’s site Chinese 2485 year tree ring study shows shows sun or ocean controls climate, temps will cool til 2068 A blockbuster Chinese study of Tibetan Tree rings by Lui et al 2011 shows, with detail, that … Continue reading
Hockey stick falsification – so easy a caveman kid can do it
With apologies to the Geico caveman, paleoclimatology isn’t just for grant enabled scientists anymore. Priceless Climategate email 682: Tom Wigley tells Michael Mann that his son did a tree ring science fair project (using trees behind NCAR) that invalidated the … Continue reading
“hide the decline” – worse than we thought
Some background from the original “hide the decline” from Steve McIntyre here Despite relatively little centennial variability, Briffa’s reconstruction had a noticeable decline in the late 20th century, despite warmer temperatures. In these early articles [e.g. Briffa 1998], the decline … Continue reading
Posted in Climategate, paleoclimatology
102 Comments
Climategate 2 email – Rob Wilson replicates McIntyre & McKitrick – produces hockey sticks out of noise
Reader Crosspatch writes in comments: 4241.txt is where Briffa Rob Wilson apparently believes he recreates what McIntyre is talking about the hockey stick showing up no matter what data you feed into it. Briffa Wilson creates randomly generated time series, … Continue reading
John L. Daly’s message to Mike Mann and The Team
Ric Werme writes in comments: When I realized the Climategate 2009 Emails went back many years, one of the first things that occurred to me was there might be Emails from John Daly. He died before I became involved in … Continue reading
Posted in Climategate, paleoclimatology
Tagged Dendrochronology, Hockey Stick, Holocene, Keith Briffa, Phil Jones
85 Comments
Carbon, on the uptake
From the University of Bristol Carbon cycling was much smaller during last ice age than in today’s climate Atmospheric carbon dioxide (CO2) is one of the most important greenhouse gases and the increase of its abundance in the atmosphere by … Continue reading
Shock news: trees grow better in a warmer climate with more carbon dioxide
The geniuses at Columbia University’s Lamont -Doherty Earth Observatory have discovered Liebigs Law of the Minimum. The tree researcher exclaims: “I was expecting to see trees stressed from the warmer temperatures,”…“What we found was a surprise.” Trees on Tundra’s Border … Continue reading
New study shows temperature in Greenland significantly warmer than present several times in the last 4000 years
Kobashi et al 2011 was just published in GRL, and it looks like it will be upsetting the paleoclimate apple cart. The conclusions of Kaufman et al 2009 look to be minimized in comparison to this much more complete study. … Continue reading
Posted in Arctic, glaciers, paleoclimatology
Tagged global warming, greenland, Greenland ice sheet, Medieval Warm Period, temperature
80 Comments
Roman Period “megadrought” found in the USA southwest
From the University of Arizona, one wonders how such a thing could happen when CO2 was at “safe” levels. They are using bristlecone pines again, which may very well be a better proxy for rainfall than for temperature. At least … Continue reading
Posted in paleoclimatology
Tagged Dendrochronology, San Juan Mountains, University of Arizona
194 Comments
Scientific consensus fails again: Start of “Anthropocene” pushed back to Late Pleistocene, scientist vindicated
Guest Post by David Middleton From The Seattle Times SEATTLE (AP) – It’s not unusual for an archaeologist to get stuck in the past, but Carl Gustafson may be the only one consumed by events on the Olympic Peninsula in … Continue reading
Posted in paleoclimatology
Tagged Clovis culture, Gustafson, Washington State University
156 Comments
A short anthology of changing climate
Guest post by Tony Brown Context is everything, and nowhere more so than in climate history, where a graphic such as this seems to illustrate an alarming uptick in temperatures that has been blamed on modern man and his profligate … Continue reading
No global climate change in the past 20,000 years?
Guest post by Dr. Don J. Easterbrook Dept. of Geology, Western Washington University, Bellingham, WA In a paper entitled “Current global warming appears anomalous in relation to the climate of the last 20 000 years,” Svante Björck claims that, over … Continue reading
Posted in paleoclimatology
Tagged Ice age, Little Ice Age, Medieval Warm Period, Southern Hemisphere
72 Comments
The Durban ramp-up begins – now the Earth only warms by hemispheres, and not simultaneously – until now
From Lund University, a new way to blame modern man. Look for more nuttiness like this as the Durban climate conference approaches. Read the conclusion of the paper below, which is a long winded treatise of speculation. New study shows … Continue reading
New science field: “paleoblameatology”
Some days you just have to shake your head and say to yourself that there’s irrational fixation on CO2 that has deep roots in the psyche when we see things like this. The 10:10 video was proof enough, but now … Continue reading
Posted in paleoclimatology, ridiculae, Science
Tagged Christopher Columbus, Columbus Day, global warming, Little Ice Age, Science News
126 Comments
BBC: The Little Ice Age was all about solar UV variability… wasn’t an ice age at all
Mike Bromley writes in: BBC has the explanation for the European LIA… it wasn’t really an ice age at all. See this strange quote.
Posted in paleoclimatology
Tagged BBC, Little Ice Age, Mike Lockwood, Ultraviolet, University of Reading
122 Comments
Evaporation, not outflow, drained ancient Lake Agassiz during the Younger Dryas
From the University of Cincinnati: Long-Lost Lake Offers Clues to Climate Change What caused water levels to drop in an immense yet long-vanished lake? Research by a University of Cincinnati geologist suggests that conditions 12,000 years ago encouraged evaporation. Not long … Continue reading























