Some corrections, clarifications, afterthoughts, and related paraphernalia concerning my book On the Moor.
Chapter 5: Trig Point
Since I wrote this chapter, the Ordnance Survey has published an interesting blog post entitled A history of the trig pillar.
Chapter 9: Heather
The environmental impact of burning moorland heather to increase grouse numbers has recently become a political hot topic (no pun intended). For more on this subject, see the British Ornithologists’ Union’s blog post Impacts of driven shooting of Red Grouse.
Chapter 10: Identity Crisis
But do the Yorkshire folk kick up a fuss when the good people of Nottinghamshire claim the man in Lincoln green and his merrie men all for their own? And even name their airport after him?
Ironically, in a chapter about local identity, I committed something of a howler, here. Robin Hood Airport serves Doncaster and Sheffield, both of which were in South Yorkshire the last time I checked. Thanks to reader Richard Lord for pointing this out.
Chapter 17: Rooks
[K]estrels are no threat to rooks.
Not true, apparently. According to Mark Cocker’s A Claxton Diary, ‘kestrels can overwhelm anything from crows to bats to dragonflies’.
King Hal’s condemnation of choughs is another case of mistaken identity. He clearly means jackdaws.
Although Henry VIII was indeed almost certainly referring to what we now call jackdaws when he used the word ‘choughes’, Mark Cocker and Richard Mabey point out in their excellent Birds Britannica that the word ‘chough’, with various spellings, was used in medieval England to refer to the jackdaw.
I’ve pretty much convinced myself that each pair of rooks within a flock tends to keep its wing-beats synchronised. Not only do the birds in each pair fly closely together, but they flap their wings in unison.
It turns out my crazy hypothesis about pairs of rooks’ synchronised wing-beats might not be quite so crazy after all. In a Twitter exchange some time ago, authors and corvid experts Mark Cocker and Nathan Emery both said my hypothesis didn’t seem crazy to them. For more on this subject, including photographic support for my hypothesis, see the article I wrote entitled My bat-shit crazy hypothesis about rooks.
Chapter 18: Ice
Although he wasn’t the first to suggest it, Tyndall was describing what we now call the Greenhouse Effect.
Since I wrote the above, Tyndall’s biographer Roland Jackson has written an interesting blog post about the discovery of the Greenhouse Effect, giving priority to the American Eunice Foote.
- Public Domain Review: First Paper to Link CO2 and Global Warming, by Eunice Foote (1856)
- My review of Jackson’s Tyndall biography.
Drax power station, Britain’s single largest emitter of carbon dioxide.
Although Drax still generates around 5% of the UK’s electricity, in recent years it has been largely converted to burning wood pellets instead of coal. Plans are also afoot to make the power station carbon-negative by 2030.
Chapter 20: Sky
In other words, it looks as if vapour trails might indeed have a measurable effect on local diurnal temperature ranges.
The study of changes in diurnal temperatures due to the absence of vapour trails in the aftermath of the 2001 9/11 terrorist attacks was brought into question by a later study.