Canadian climate at 52N has not recorded a frost yet this winter! (night, dewpoint)
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I guess it would be more accurate to say then that Cape St. James didn't record a freeze or air frost in the winter of 2012-2013
It's hard to tell if a place recorded a ground frost by looking at temperature data. A low of 2°C or below gives a good hint, but not necessarily. If it's windy and/or cloudy at above freezing, it might not. I'd guess Cape St. James is very cloudy during the winter.
Still, light ground frosts don't seem to do anywhere near as much as damage to most plants as freezes. Springtime here plants coming out can usually manage ground frosts ok if they're for a short time.
I don't care what you say. A frost is a frost and if it is -10c the frost is still going to be damaging even if it is not really white.
That's right, a frost is a frost - that is frozen condensation. It can happen above or below 0C.
What I'm saying is that your assertion about lack of visible frost, doesn't really make sense in a climate as humid as yours. In effect your saying that there is little condensation (dew) above OC and nights above OC aren't still enough for cold air to sink to ground level. Although given how windy and cloudy your climate is, I guess this is feasible.
OC can be very damaging to plants, because even if the temperature at 1.5 metres is OC, the temperature at ground level can be -8C. Not good for low crops like tea, grapes or asparagus.
We can get periods here when the temperature remains below freezing for long periods but no visible frost forms. This occurs during easterly winds off the European landmass which brings dry air, cold air, usually with cloudy skies.
We can get periods here when the temperature remains below freezing for long periods but no visible frost forms. This occurs during easterly winds off the European landmass which brings dry air, cold air, usually with cloudy skies.
That's right, a frost is a frost - that is frozen condensation. It can happen above or below 0C.
What I'm saying is that your assertion about lack of visible frost, doesn't really make sense in a climate as humid as yours. In effect your saying that there is little condensation (dew) above OC and nights above OC aren't still enough for cold air to sink to ground level. Although given how windy and cloudy your climate is, I guess this is feasible.
OC can be very damaging to plants, because even if the temperature at 1.5 metres is OC, the temperature at ground level can be -8C. Not good for low crops like tea, grapes or asparagus.
Thats in your climate. Not here in Northern Ireland, we don't have those differences.
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