Norges unike skjærgård

(Norways widespread coastal platform – English version below)

Normalt tilbringes påska i fjellet, i år kombineres fjell og hav på segl og ski, langs norskekysten fra Tromsø til Ålesund. I realiteten ser det ut til at tre dager i Lofoten kanskje blei den skikjøyringa me fekk. Snart i Røyrvik nå med sikte på Sunnmørsalpane, men mildvær og regn har prega dei siste dagene langs kysten fra Svolvær, i tillegg til kraftig motvind og sakte gange. Vestfjorden fra Svolvær til fastlands-norge var et reint mareritt med 2-3 meter krappe bølger og sterk vind prega av kvalme og dårlig befatning. Letta då me kom til Nordskot og kunne seile innaskjærs. Akkurat dette ”fenomen” legger grunn for neste blogg-innlegg. Medan bølgene nå herjer opp i 4-5 meter lenger ute,  seiler me i nesten flat hav innaskjærs. Se bølgekart under som eksempel, hentet i dag fra windyty.

Bilda over er tatt fra seilbåten barba i påska og i januar, og viser eksempel fra påsketuren og Norges skjærgård langs helgelandskysten 

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Eventyrøya Senja

Aside from the attractions on Senja such as Senjatrollet (the world’s largest troll) and the traditional fishing communities (as well as a Halibut museum), the geology is also a reason to visit Senja. The northern and western coasts face out to open ocean and mountains plunge near vertically into the sea. According to some tourism websites, almost every aspect of Norwegian scenery and nature can be found on the island.

We have covered quite a lot on this blog about the Caledonian Mountain Building episode which is responsible for Scandinavian mountains in general, and talked about some of the rock types. A general rock ‘family’ that gets mentioned quite a bit are metamorphic rocks. Metamorphic rocks can form as either igneous or sedimentary rocks are altered due to either pressure (as rocks are buried in the crust) temperature (the deeper towards the mantle a rock is, the higher the temperature) or chemical alterations (i.e. when water passes through a rock chemicals in the water can interact with chemicals in the rock changing the mineral structure).

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Dragons Teeth (Ersfjorden, Senja) in Winter. Photo: Private, taken by Malin

Senja

Dragons Teeth (Ersfjorden, Senja) Summer. Photo: Private, taken by Kate

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Sastrugi and snow waves

Most of you have probably noticed how the wind is capable to shape and polish snow surfaces, make fascinating structures, often similar to ripples and sand dunes. Fascinating to look at, but a hustle to ski on. I guess many of you are also very capable to point out the latest wind-direction based on the shape of the structures. However, some of these structures are very complex and it can be difficult. Examples are sastrugi versus regular snow waves, they are very different features formed by wind blowing on top of snow.  In this blog post we will touch a little bit into this, how they form in relation to wind direction, and how they are different from each other’s, and from ripples and dunes in sand.

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