Sea smoke has formed over the fjord in the current cold spell. Locally, thanks to the warming affect of the fjord it didn’t go much below -15C in the night. It’s significantly colder on the other side of the fjord where it was about -20C this morning, cold air (below -30C currently inland) sinking along the major river valley (Stjørdalselven) into the fjord basin. Sea smoke forms when a light wind of very cold air mixes with a shallow layer of saturated warm air immediately above the warmer water. The warmer air is cooled beyond the dew point and can no longer hold as much water vapor, so the excess condenses out. The effect is similar to the “steam” produced over a hot bath or a hot drink, or even an exercising person (Wikipedia). Thus, it’s confined to the water and we almost never have fog on land here. The smoke tends to form thickest on the other side of the fjord where it’s coldest. The sea smoke was constantly changing this morning, witness these pictures and the video where the low lying smoke drifts quickly from land to fjord, whereas the waves that can be seen are coming from a different direction, probably driven by the sinking air (wind) coming out of the river valley in a different direction.
11th February: Still cold at -15C this morning (¨20C on the other side of the fjord and down to -40C inland). Two new videos added below (at the top):
It wasn’t until the last day of December towards midnight that the air temperature finally sank significantly below zero (C), an almost frost free winter month is becoming common up here. However, since New Year it hasn’t been above zero and today was the coldest yet with “sea smoke” forming on the other side of the fjord where it was maybe 5C colder. Due to the wind blowing from the east across the fjord, the air temperature increases due to the relatively warm water. Makes for a nice view from the office now that the sun is also back now.
Apologies to all who contacted me wondering if I was alright as I hadn’t posted for a month! No alarm…I’ve been very focussed on writing a series of 10 articles on perennial vegetables, completed earlier this week! Finally, we could “bask” in sunshine again this morning after a few days of overcast and snow meant that we wouldn’t witness the return of the sun (due around 10th January). It doesn’t rise above the southern hills for 4-5 weeks here….a great time of the year as we get several hours of red skies each day. The firs(t) of many sunrises in 2021: The sun’s rays reflecting from Malvikodden: Fully risen through trees in the garden: A few pictures from when we were in the midwinter tunnel (aircraft contrails have been an unusual site):