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This is closer, with a mean of 0.3C in January. It's in Scotland. I'm sure some areas of the Cairngorms have subarctic climates, using the 0C threshold.
This is closer, with a mean of 0.3C in January. It's in Scotland. I'm sure some areas of the Cairngorms have subarctic climates, using the 0C threshold.
Subarctic climate is below treeline, I'd assume below treeline at some elevation there must be a subarctic climate. Or perhaps, because the UK is so oceanic that Cfb/Cfc transitions straight to alpine tundra as with cooling summers reach the threshold for tundra before winters reach subarctic levels. Here's a way to check. Here's Ben Nevis:
Assuming constant temperature decline with altitude, maybe you could extrapolate to figure out if/where there's a subarctic climate. Perhaps I'll do that tonight.
Well what are the conditions for Tundra lol? Maybe the hills of Northern Ireland have tundra because we have hills that average like 1c.
ok so here are the 'coldest' conditions for our hills in NI.
Apparently 2.5c which to me seems a little high because my average high is 6c and slieve donard is at 850m.
The metoffice did say that slieve donard has a mean yearly temperature of 4c and according to this site the conditions for a tundra climate are:
In the tundra, conditions are cold, with an annual average temperature less than 5� C,
ok so here are the 'coldest' conditions for our hills in NI.
Apparently 2.5c which to me seems a little high because my average high is 6c and slieve donard is at 850m.
The metoffice did say that slieve donard has a mean yearly temperature of 4c and according to this site the conditions for a tundra climate are:
In the tundra, conditions are cold, with an annual average temperature less than 5� C,
Perhaps they skipped some of the highest altitude sites since they are small in area. Also your map shows average maximum temperatures, not mean temperature.
As for tundra, that's not the usual definition. That may work for the UK, but not elsewhere. Tundra means no month has an annual mean of 10°C or above. A monthly mean of 10°C is sufficient to support tree growth and other similar plants. Colder, and all you get is grasses. This mountain has a tundra climate, no trees:
Mean is close to the borderline. Although, treeline doesn't necessarily follow the 10°C isotherm exactly. In the White Mountains of New England, 12°C is a closer border. This climate has an annual mean well below 5°C at 1.6°C but is not tundra. Its warmest month is too warm. Its subarctic. Natural vegetation is conifer forest.
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