Feet on land: The Arctic Ocean cruise come to an end

The last Saturday on the cruise was spent dismounting most of the equipment, while the ship laid still and drifting near the ice edge (where the transition from open water to ice is in the sea). The rest of the gear will follow the ship to Helsingborg, and be taken off during demobilization later in October. For myself, my equipment consisted of some cables and a laptop, so I managed to bring it with me in my bag.

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On the top of a container on Monkey Island (the deck on top of the bridge), helping Martin dismount equipment.

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Time zones on the top of the world

Illustration of the time zones of the world, where the earth is seen from the top (source).

The last week or so we have been doing bathymetric mapping surveys of the seabed in an area more west, close to Canada. We transited from the pole further south, to around 82°N 142°W, for these surveys. Transiting 7° south may not sound like much, but it is approximately 780 km (I wrote about the conversion between degrees and distances here). I was surprised by the noticeable difference in light.

I want to talk a bit about time zones and longitudes, which are actually a bit tricky up North. When you travel east and west in the world, depending on which longitude (breddegrad) you are on, there are different time zones. This is because night and day occur at different times in different places on Earth, due to Earths rotation. I assume most people are familiar with this. The first figure below illustrate the time zones of the world on a map of polar stereographic projection (the North Pole is in the middle, and the equator on the outer edge. I have another post coming up on maps can be tricky business in the Arctic.) You can see that the closer you get to the Pole, the closer are the lines/longitudes and therefore the time zones. Since the longitudes define the time zones, and the longitudes come together at the poles, the time zones in reality change a lot with small distances up here.

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