| Blogg för LongTerm-expeditionen 2007 |
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 Bakgrund |
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Expeditionen startade i Köpenhamn, med reguljärflyg
till Longyearbyen på Svalbard den 23 juli 2007. Här transporterade vi oss
vidare i chartrad Twin Otter till Station Nord, liggandes uppe på
nordostligaste Grönland. Denna station - delvis en kvarleva från kalla
kriget, byggd av USA för långdistansbombare - är bemannad genom danska
försvarsmakten året om med en vinterstyrka på c. 6 man, men betydligt fler
under sommaren för allmänt underhåll. Och så naturligtvis en massa
forskare som har Station Nord som utgångspunkt. Så även för oss; här fanns
vår Twin Otter stationerad för förflyttningar och slutlig inhämtning efter
våra planerade c.
drygt fem fältveckor. Expeditionens medlemmar - totalt
11 geologer/biologer från Danmark
(5), Norge (3), Sverige (2) och England (1) - delades upp i tre
forskarteam med olika geografiska områden och frågeställningar att lösa.
Nedanstående blogg skildrar i veckorapporter vad undertecknads team 2
upplevde. Vårt team låg nordligast placerade på Grönlands
nordkust på c. 83.5 grader nordlig bredd. Härifrån
är det 70 mil till Nordpolen! |
2007-07-30 |
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The Twin Otter makes a 180 degree turn
for the final approach to the landing strip when Nicolaj cries out: look,
a polar bear with a small cub! A few minutes later – bump, bump – and we
are grounded. We are now the northernmost people on earth with solid
ground below our feet, more exactly at Kap Morris Jessup on the north
coast of Greenland at c. 83.5 degrees north. We means Team 2 in the
LongTerm project, consisting of Per Möller and Nicolaj Krog Larsen from
Lund university (specializing in glacial geology), Henriette Linge from
Bergen university (a specialist in dating rock surfaces and boulders by
means of cosmogenic radionuclides) and Eric Steen Hansen from Copenhagen
university, a biologist specializing in lichens. We are here primarily for
investigating climatic and environmental change along North Greenland’s
coasts over the Holocene (11,500 years back) or as far as the geologic
record goes.
We have now been in our camp since the
25th of July in beautiful arctic weather; just blue skies and a
gentle cool breeze from the frozen Artic Sea in the north, making the
temperature barely reaching four degrees. Though a polar desert, part of
the ground is covered in violet Saxifraga and yellow poppy, and the odd
white polar hare and grouse with numerous chickens wonder who we are to
invade their territory. The geological work at this place is now more or
less finished, meaning that we have dug down in most sections available,
looking for evidence of past glacier advancements and retreats, and change
in sea level and sea ice conditions. Some 70 lichens have been found and
determined to species. We are now waiting for pick up by the Twin Otter
and a transfer to Sifs valley some 20 km to the east. |
| 2007-08-05 |
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Last Wednesday
night three o’clock in the morning the message came: “the Twin Otter is
on its way”. All stuff was packed in a hurry and the tents were taken down
in the bitter cold night (minus 3 degrees, but the sun as usual hanging up
there in the blue sky). We were more or less ready when the Twin Otter
broke though the low fog lying at the shoreline. At eight o’clock in the
morning the new camp was ready in the Sifs/Constable Bugt valley, in
beautiful morning sun. We were, however, quite exhausted, and went to bed.
Now we have been in this very beautiful valley for five days. Our camp is
situated c. 5 km from the coast behind a prominent end moraine ridge,
protecting us somewhat from coastal fog and chilly winds.
The wildlife is
plentiful; it is a sort of “Garden of Eden”. Muskoxen are abundant, from
small herds with cows and calfs, to the lonely bull, sometimes being a bit
aggressive (but it is usually just a “show-off”). Gees come in flocks of
50 to 100eds. Arctic hares are abundant and totally unafraid of us.
Yesterday we had a close encounter with three young snow owls, the first I
ever have seen in North Greenland.
So far the weather
has been very stable: mostly sunny and just the occasional clouds. If we
go higher up in the terrain it is quite warm (more than 10 degrees) and
the chilly wind from the ice in the north does not reach us. Our hikes are
usually between 10 and 20 km each day, so we arrive back in camp on tired
legs. We have actually even taken a swim in the river at our camp to cool
down; that was, however, quite a cold experience!
So, what is the
aim for our studies here? We were here also last summer and now we are
trying to sort things up that were not exactly as we thought when datings
on different sediments were received during the last winter. The
scientific problem here is the relation in time and space between a large
ice
stream along the coast and local valley glaciers flowing from the
mountains in the south towards the present coast. The last ice expansion
was surprisingly young, so now we must do a revision of last year’s glaciation model; I think we are on the right track already, and we have
at least some 5-7 days left here before relocation to a new camp site. 
Eric hunts as usual
for lichens, and is happy every day as new, and often surprising, species
always turns up. |
| 2007-08-12 |
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Climate is
important in human-scale and geologic time scales. So is also weather in
arctic expedition time scale. This we really learnt during the last week.
The weather turned 180 degrees last Monday; from 2-3 degrees chilly winds
from the sea ice in the north we suddenly had a very strong, warm wind
from the south and temperature peaking at c. 22 degrees in the afternoon
for two days! Very nice of course, but the result came two and a half days
later. Last Friday we woke up at five o’clock in the morning with water in
our tents. Our camp was at the river bank, just 0.5 m above the – what we
experienced from last summer – quite stable river and just along the
landing strip for the Twin Otter. We could see the river level rising with
bare eyes, and quickly
relocated the whole camp to the highest possible
location, i.e. in the middle of the runway some 70 cm higher. We went to
bed again, though monitoring the river level each hour. At two
o’clock in the afternoon we realized that we would be flooded in 5 hours.
Quick decision; relocate to a much higher gravel bar some 200 m north of
the camp! We thus rafted and carried our +1000 kg camp and were ready some
hours later, just to see the whole landing strip disappear beneath water
at eight o’clock.
Since then the
water level has continued to rise and our gravel bar grew smaller and
smaller, and became an island yesterday. We then suspected that it could
not just be the melting of snow and ice from the föhn wind situation;
Nicolaj and Henriette climbed a bit up on the valley side and saw
something that we have just been joking about; 25 km to the south our
valley is blocked by the Sifs outlet glacier, damming a lake to the south
of it at an altitude of 216 m above sea level, whereas the two lakes on
our side of the glacier are just at 18 and 14 m, respectively. What if the
upper lake broke trough? And that was exactly what they saw this morning;
a week ago the glacier was a tight cork against the valley side, but now
there was a cascading river between the glacier and the valley side,
explaining why our river is just rising and rising. This could of course
get very serious for us on our small island in the river if the gap
continued widening. So once more, relocation a few hundred meters away on a
plateau c. 15 m higher up. Here we should be safe. However, we suspect the landing
strip will never be fit for landing when we are due to be picked up at
around the 26th of August!
The Twin Otter was
also supposed to land today with our food rations for the last two weeks
as we just have food left for c. five days. As landing was not an option
we were instead “food bombed”; food containers were dropped from the
slowly approaching Twin Otter, making large splashes in the shallow water
along the river (see
video-clip), and we had to be quick about it getting the containers in
before the stream took them. Most things survived, though there was a nice
mixture of mayonnaise and rice between some of the cans. And we never got
hold of our wine boxes that were said also to be dropped. A few hours
later the Twin Otter returned, scouting for a possible landing strip
further up the valley (they can land at very odd places, just flat dry
ground without boulders and a length of c. 100 meters). They obviously did
so as we later saw a large dust cloud and heard roaring engines (meaning
full breaks and short strip) a few kilometres away. So hopefully we can
be brought home and do not have to over-winter!
Otherwise, we still have had just
beautiful weather that doesn’t interfere with our geologic and
lichenological work. So we continue to sort out the relations between
different geologic units and landforms. We recently have solved one puzzle
from last year: then we found a lot of mollusc shells at 40 m above sea
level lying on the ground surface, but not in any marine sediments. The most
probable solution then was that they were a remnant – a lag – from
marine clays that once were there. However, we have now located a site,
covered in snow last summer, where the shells are situated in a 1.5 m high
till section! The shells and their host sediment have thus been taken up
by an advancing glacier further up the valley, mixing sediments and shells
with other debris, and depositing all in a till forming the end moraine
ridge (see previous blogg). This tells us that the valley glacier advance
is younger, and not older, than the marine sediment, which makes a lot of
difference when it comes to the geologic history of the area!
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| 2007-08-19 |
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What a miserable
week! We have only had one possible working day. Since last Tuesday it
has been dark clouds, rain and snow, and a wind trying to blow the camp
away (see video-clip). The wind died away after lunch yesterday, and there was hope for
weather improvement. But during the night the storm hit us again with all its
powers, and we have now (when this is written on Sunday night) been
fighting the storm for 20 hours, clearing the tents from drifting wet snow
and securing tent pins with large boulders as the wind pressure drag them
out of the now very wet silty ground. Above all, we must have the quite
large kitchen tent secured, and one person is sitting there all the time
to give alarm if anything breaks. So, now it is a matter of survival! Team
1 is even worse off, having had 25 m/s wind for seven days now, and about
a metre of snow.
Our landing strip
is still 2 metres below water, so this will unlikely be useable for the
evacuation, originally planned to take place next Monday the 26th. We have
located the alternative landing strip that the Twin Otter found on its
last visit to be two kilometres away, and marked it up with canvas sacks.
The distance is too much for carrying all equipment, so we must bring in
one of the terrain vehicles that team 1 has been using for transport.
Weather forecasts give us hope for an improvement in a few days, and as
everything has developed with winter approaching, we will try to get the
Twin Otter up from Iceland as fast as we can and evacuate all teams to
Station Nord as fast as weather permits; we would not appreciate to be
trapped in another week-long storm!
This earlier
evacuation – if possible - will not mean so much for our scientific work.
We could still use three full working days, but these should then be spent
on objects with a lower priority. This is how it works in the Arctic, you
never now what weather will permit you to do, and we have been extremely
lucky for the first three weeks of the expedition! |
| 2007-08-26 |
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Someone
closed the
gate last Monday, and suddenly the wind died. We woke up to the clearest
blue sky you can imagine. The snow from the storm had covered the Alpine
mountains tops at 1000-1500 m in the south in total white, and further
down the slopes there was a fantastic graphic effect between snow and bare
rock. Later, when the mist rolled in, gravity seemed to have stopped
working, and we could see the peaks floating on top of the mist and
reaching for the sky.
So, once again it
was working weather and we could complete the planned work, meaning moving
round in the terrain (some dig
more than others ...). The snow storm had created fantastic snow sculptures
in the lee of boulders, and some still blooming arctic poppy showed their
yellow cup through the snow in some places - this is due to the fact that
the cup acts as a parabola collecting sun light and projecting it back,
melting the snow! All animal youngsters seem to
gather now as autumn is
here;
the snow-white arctic hares were seen in
large groups of 12-15, both fooling around and eating, and grouse could
bee seen in groups of some 20 now quite large chickens and some few
adults. During the week we have also had constant visits at the camp by
two polar foxes, first fighting over leftovers in our waste pit, and later
seen playing, running after each other, lying down on watch, then jumping
over each other.
The pre-scheduled
Twin Otter arrived to Station Nord last Thursday afternoon and evacuated
team 3, but could not take off for the remaining two teams the day after
due to white-out at Nord. Friday night it was time again; the storm hit us
with full power, and Saturday morning our kitchen tent finally gave up, after
which the wind died. Full of hopes, we were said to be evacuated in the
afternoon. We packed all equipment in our heavy boxes, except our personal
tents, and started to carry everything down to the original landing strip;
the water in the river had sunken dramatically for the last two days and
it was dry land again, though a bit soft. That
was an exercise of about 18 km in total for each of us! But of course the
Twin Otter did not take off for us; instead it headed for Kap Ole Chiewitz
and evacuated team 1, after which it was good night for the pilots at
11 o’clock. And we were stuck there with perfect landing weather the whole
night! It was still ok at 9 in the morning today, and the plane set off,
but that was all to that. As we were carrying our tents and personal
equipment over the mudflat toward the landing strip we heard the plane circulating
high above us in the clouds, and then just disappear. The pilots took the
decision that it was not possible to land as they saw a snow storm
approaching, and right they were. So we just had to put up two tents again
on our original camp site here at Constable Bugt, and here we are sitting,
the wind roaring and the snow coming parallel along the ground outside.
Hopefully we eventually will be picked up, but there are not many hours of
weather window permitting the flight operation. So we are now the four
absolutely northernmost people on Earth, and feeling somewhat
abandoned......
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| 2007-09-01 |
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The snow storm had
us in its grip the whole night towards Monday morning, but then it died
out. Due to the hard winds no snow accumulated on the landing strip.
However,
our two tents put up as shelters were the perfect snow catchers; a half
meter of snow was blown up around them. When I went out first thing in the
morning I noticed that we were not alone, we have had visitors! Track from
our two friends the polar foxes revealed that they had close watch on us,
and even had been at the entrances for a sniff.
Flying conditions were
good the whole day, but the two hours in-between satellite telephone
contact to Station Nord just told us continuous snowing there, and so it
went on for the whole night and the morning of Tuesday. Food was now down
to minimum, with just one supper left, and then
some bread and soups. The
situation was not optimal, to say the least. However, after lunch we saw
the blue strip in the north, rapidly expanding southwards; the high
pressure prognosticated for yesterday was approaching and after a few
hours we had majestic snow-covered mountain tops against a clear blue sky,
mirroring themselves in the river; no wind what so ever. It was go-go-go
here, and in the late afternoon also at Station Nord – we thought. The
Twin Otter arrived at about seven o’clock and after quickly loading it, we headed south. An approach
to Station Nord was made, but now the clouds were down to ground level
again and impossible to land! So the plane just did a steep climb and turned north again, heading
for Kap Moltke in the inner part of Independence Fjord, some 50 minutes
from Station Nord. There we stayed for the night in a hut, so at least we
didn’t have to put up tents again. Fine weather on the next morning, and a
new try towards Station Nord, and now we barely managed to slip under low clouds
and hit the ground at this infamous place when it comes to weather. So,
eventually after six days of trying we were “home”. Warm showers, nice
warm food and a couple of beers were waiting for us.
But Station Nord
was of course not our final goal; the plans were to continue towards
Iceland after a few hours stop. But due to the involuntary overnight stay at Kap Moltke the pilots had run out of flying hours and must have their regulated rest.
So the blue skies of the high pressure came and went, and it was snow
again over this winter landscape. The planned pre-evacuation had now gone
over into expedition overtime, putting a quite high stress on most of the
expedition members due to obligations waiting at home – and there was not
much to do about it. Snow and low clouds were reported along the whole
east coast of Greenland, including the places for mandatory fuelling for
the Twin Otter on its way to Iceland. But nice food, showers, and a
suddenly upcoming sledge tour made some compensation! On Friday the prognosis for flyable
weather was not good; possibly a flight on Monday or Tuesday as a low pressure seemed continuously rotate
around us. However, early Saturday morning when I was in the shower it was
shouted: take off in one hour! Suddenly it was hectic activities and away
we were! After fuelling stops along the east coast of Greenland at Danmarks Havn and Constable Pynt we headed for Iceland. 22 hours after
take off from Station Nord we were all in Copenhagen, and the expedition
came to an end. All near and dear ones were quite happy to have us safe at
home after close to six weeks of absence.
Our results from
this season and those from the previous one in 2006 were summarized during afternoon
meetings at Station Nord, and we were all quite content with the total
outcome of the expedition. A publication plan, a plan for talks at upcoming scientific
meetings, and how we shall inform about our results in a more popular way
was agreed upon, though we must await a large number of dating results. A
minor part of the latter objective will the publication of these bloggs on
my personal home page (Per Möller at
http://www.geol.lu.se), with addition of a number of pictures,
hopefully ready in a month or so - as you now see is the case! If readers of these bloggs have any
questions on our work, please feel free to contact me on e-mail (per.moller@geol.lu.se).
All the best!
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