Category Archives: climate

Tibetan tree-rings and the sun

Via Maarten Blaauw’s Club du Soleil, I’ve found another paper reporting evidence of solar variability in tree-rings from Tibet. The evidence in the first was dubious, is Duan and Zhang (2014) any better? Readers familiar with this series critically evaluating … Continue reading

Posted in climate, Peer reviewed literature, solar variability | Tagged , | 7 Comments

Lasers, biomarkers and the Sun

The earliest work on Holocene palaeoecology focused on megafossils such as Pinus stumps. Then macrofossils such as hazel shells were used to reconstruct species distributions and climate. Then pollen analysis became important, complementing rather than supplanting the larger fossils. The end of this progress towards smaller … Continue reading

Posted in climate, Novel proxies, Peer reviewed literature, solar variability | Tagged , , | 1 Comment

An honest view of sea level change?

Writing for the National Parks Traveller, ecologist  Daniel Botkin claims the sea level has been rising since the end of the last Ice Age, starting about 14,000 years ago as the continental and mountain glaciers have melted and sea water … Continue reading

Posted in climate, Fake climate sceptics, Silliness | Tagged | Leave a comment

Climate implications of Holocene Sea level changes

A few years ago Andrew Kemp and coauthors published a sea level reconstruction for the last two millennia from two salt marshes in North Carolina. Reconstructed sea-level was relatively stable until the start of the 20th Century, when it started … Continue reading

Posted in climate, Fake climate sceptics, Peer reviewed literature, Silliness, WUWT | Tagged , , , | 10 Comments

Bob Irvine is bringing engineers into disrepute

Bob Irvine is touting his new paper at WUWT. He seems very happy with himself. He shouldn’t be: the paper comparing the efficacy of solar and greenhouse forcing is awful. The first indication that the paper is going to be bad (other … Continue reading

Posted in climate, Fake climate sceptics, Silliness, WUWT | Tagged | 30 Comments

Did the Sun tickle the diatoms of Disko Bugt?

Diatoms, transfer functions and claims of palaeoecological evidence of solar variability: how could I resist discussing Sha et al. (2014)? Sha et al develop a diatom-sea ice transfer function and apply it to a diatom record from a core from … Continue reading

Posted in climate, Peer reviewed literature, solar variability, transfer function | Tagged , , | Leave a comment

The Sun on the Nile: how many degrees of freedom?

In 1978, A. B. Pittock wrote a critical review of long-term Sun-weather relationships, complaining of the low quality of papers reporting solar effects on weather. One of the paper’s recommendations is that authors should 3. Critically examine the statistical significance of the result, making … Continue reading

Posted in climate, Peer reviewed literature, solar variability | Tagged , , | Leave a comment

Diatoms, sea-ice and temperature

Diatoms make good proxies for palaeoenvironmental reconstructions: their exquisite silica cell walls can be identified to species level (mostly); they preserve well in sediments (usually) and they are sensitive to multiple environmental variables. Being sensitive to multiple environmental variables is … Continue reading

Posted in climate, Peer reviewed literature, transfer function | Tagged , , | Leave a comment

Recipe for a hiatus

Fake climate sceptics love the hiatus, the period since the strong El Niño in 1998 where global mean temperature has not increased according to their simplistic notions of global warming. The longer the “hiatus”, the more they can deny that climate … Continue reading

Posted in climate, Fake climate sceptics, Peer reviewed literature, R | Tagged | 48 Comments

The perils of just reading the abstract (and of not understanding it)

The last interglacial is the early Holocene on steroids. Changes in the Earth’s orbit caused high latitudes to received increased summer insolation and they were consequently even warmer than the early Holocene. A large fraction of the Greenland Ice Sheet melted and … Continue reading

Posted in climate, Fake climate sceptics, Peer reviewed literature, WUWT | Tagged , , | 6 Comments