First frost on the bog
The bog holds cold differently from the forest. You feel it through the boots before you see it.
I left the car at half past six, in the dark, with the headtorch on and the temperature at plus two. Twenty minutes later the boardwalk was white. Nobody had told me it would be that early in the year.
The ten-minute window
Frost on a bog is not a morning-long thing. The cotton grass heads take it first, then the flat leaves of the cloudberry, and then the sun comes over the treeline and the whole picture is gone in about ten minutes. If you arrive at eight you will see a wet bog and wonder what the fuss was about.
What it looks like at half past seven: every seed head wearing a cap of ice, the surface of the bog firm enough to walk on where it was a sponge in July, and a silence that is different from the summer silence because nothing is moving at all.
Why the bog is colder
Open ground loses heat faster than forest floor, and a bog has water right at the surface. So the same night that leaves the forest at plus four will put frost on the bog. It is the first place in a district to freeze and the last to thaw, which is also why the cloudberries there are the best ones — they ripen slowly.
If you want to know whether autumn has started, do not look at the trees. Look at the bog.
Practical, because bogs are not forgiving
- Frost makes the surface firm, which is tempting and slightly dangerous: the crust is thin and the peat underneath is still saturated.
- Boots with a proper sole, not trainers. The boardwalk is wet even when nothing else is.
- Take the headtorch even if you plan to be back by nine. In late September the light goes early.
I was home by eleven with cold hands and nothing to show for it except a note that says, in bad handwriting: first frost, 26 September, cotton grass. That is what the notebook is for.