Tag Archives: Trondheimsfjord

Sea Smoke

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):

A Venusglade

I often shown pictures of moonglades from the house (the long beam-like reflection of the moon on the fjord), but I’d never noticed a venusglade before. Then three nights ago a long beam reflection of the fjord was clearly visible under venus (very bright at the moment) with the naked eye. I only had a hand-held camera and this was the best I could get, just weakly visible:

Then, last night it was clear again and armed with tripod I made a one minute exposure of the scene. Of course, in the course of a minute we’ve moved some distance and venus is unclear…and the stars are stripes in the sky. The venusglade is wider also as it too moves, but it nevertheless makes for an interesting picture with the bonus of an auroral glare over Forbordfjellet. I must try over-exposing next time:

Digitally enhanced:

…and what is this?

3,590 Pinkfeet

One of the highlights of spring for me are the large flocks of pink-footed geese (pinkfeet) or kortnebbgjess in Norwegian passing Malvik on the final stage of their journey from their overwintering grounds in the low countries to their staging post just north of here before the final journey to Svalbard. We heard yesterday that an estimated 15,000 pinkfeet had been observed flying north over Oslofjorden and on up Gudbrandsdalen the broad river valley north from Oslo to Trondheim. However, last night we were told that due to bad weather they had stopped south of the mountains.  I heard a few last night so a few had flown over the mountains….but I was woke at 07:30 as the first flocks started passing and they continued in a steady stream until I had to leave at 12 pm. 
I recorded as many flocks as I could by pictures and videos….and estimate that at least 3,590 birds passed in 22 flocks during the morning…so today was very different to what I’d planned! This is the largest number I’ve recorded here and the main migration is nowadays 1 month earlier than it used to be, one of the most obvious and dramatic signs of climate change here….

Here are all reported pinkfeet (kortnebbgås) observations in Norway the last two days showing that the birds fly along a narrow corridor from Denmark into the Oslo fjord, on up the Gudbransdalen valley and then over the Dovrefjell mountains (few observations) to Trondheimsfjord. The furthest north observations are at the staging post area (farmland):

 

Early Rise in Early April

This is the best time of year for getting up at the crack of dawn, lots of birdsong too! The sunrise at the moment is about 6 am…..but, in a few weeks, it will be 3 am which is a bit early! The long-term forecast is for clear-blue skies for the whole of Easter week here….with over 10C during the days…cold at nights to start with (it was -5C when the picture was taken) but frosts disappearing in a few days! Should be a great Easter week working in my gardens!