More DW Blogs DW.COM

Ice-Blog

Climate Change in the Arctic & around the globe

Search Results for Tag: research

A good haul for polar night team

Light in the polar darkness

Light in the polar darkness

The Polar Night cruise will come to an end on Tuesday, when the last of the scientists will leave the ship with their samples. I was able to stay until the end of the week, when I left the ship at Ny Alesund with some of the researchers, who were changing places with colleagues. I have left Svalbard, but not the Arctic. More about my current whereabouts later.

A good haul in the polar night

It was interesting to hear that our scientists were happy with their “catch”. Sören Häfke, the German scientist from the Alfred Wegener Institute in Bremerhaven, had more than enough of the little crustaceans calanus finmarchius. When they get back to Germany, they can start their genetic analysis to find how their biological clock works in the dark, Arctic winter. In summer, it is assumed light tells them when to come to the surface to feed and when to go down deeper to avoid predators. But what happens in winter, when it is dark all day long? I will look forward to hearing what they find out.

Valuable mud!

Valuable mud!

The Russian team had plenty of interesting sediment samples to look into. The others on board also seemed to be happy with the plankton, crustaceans and small fish they brought in for further research. Marine Cusa was a bit unhappy about the lack of polar cod in the fjord. There seemed to be no shortage of larger Atlantic cod. This is related to the amount of Atlantic water currently present in the fjord, expedition leader Stig Falk-Petersen explained to me. It looks as if Marine will be changing the subject of her Master’s thesis. But I have the feeling it will be no less interesting.

Tiny creatures, just a spoonful!

Tiny creatures, just a spoonful!

“Life doesn’t stop when the light goes out”

Paul Renaud, a Professor at the University Centre in Svalbard, coordinated the logistics of the expedition on board as well as conducting his own biological research. He is one of those who came up with this Polar Night project. As he sums it up, there is a need to follow up on the few studies done in the last ten years which  indicate that there is much more activity in the Arctic ocean in winter than previously thought. This must be triggered by processes other than light. Light is critical for the functioning of the ecosystem, but “it’s not that when the light goes out, everything stops functioning”, Paul told me.

paul renaud

Paul can be happy with a succesful expedition.

From the samples I was shown under the microscope, I can confirm that there is indeed plenty of life going on. And many of the creatures were carrying eggs.

Climate paradox: easier access – shifting parameters

I asked Paul what was driving the surge of research into the Arctic winter. Firstly, new technology makes it possible to take measurements under the ice, and all year round, when there is no-one up  here, he explains.  Buoys tethered to the ice are one example. A series of permanent observatories has also been set up in the fjords here, measuring temperature, salinity, oxygen, light, chlorophyll and the movement of plankton. The number of research stations in the region has also increased.

The other major factor is quite clearly climate change. The absence of ice makes it much easier to sail up here, says Paul.  Just 20 years ago, this fjord would have been completely covered with ice at this time. Now the sea ice is only found in the far reaches of the fjord. But Paul confirmed my theory that while warming is making access easier, it is also changing the parameters the scientists want to measure.  “We are addressing a moving target”, is how he describes it.

Plenty cleaning to be done on the trawl deck

Plenty cleaning to be done on the trawl deck

Ice, less ice, no ice?

When it comes to forecasting how the Arctic ocean and its ecosystem will react to climate change in the long term, the scientists here say we desperately need more data. The IPCC gives around ten scenarios for how climate in the Arctic could develop, Paul explains.  Clearly, if we can rely on predictions that the Arctic will be ice-free in summer from the middle of the century at the latest, that will have certain effects on ecosystems

Some organisms can be very flexible, says Renaud, not breeding for ten years and still continuing their populations. But short-lived organisms that rely on a certain timing of ice or live in the sea ice may well be more seriously affected. But without more information, it is impossible to tell how they will react in the long term.

Along with climate change, increased development is bringing more changes to this once inaccessible region, as discussed many times here on the Ice Blog and in my articles for dw.de. Paul is involved in developing monitoring practices. He stresses this is new territory for economic activities like oil exploration, fisheries, tourism and shipping, and that we urgently need more data on the effect of these activities on sensitive components of the Arctic ecosystems.

Can science keep pace with development?

One question I seek the answer to when I talk to Arctic experts is: can this research keep pace with the speed of the development? The answer depends partly, of course, on how fast that development will be. The Svalbard expert says there will still be sea ice in the Arctic in winter for the foreseeable future, around 100-150 years. That will slow economic activities like oil and gas exploration. “That buys us a little more time”, says the marine biologist. But he sees a huge challenge to identify and monitor the impacts of rapidly growing activities like tourism and shipping.

The washing machines on the Helmer Hanssen were doing overtime

The washing machines on the Helmer Hanssen were doing overtime

As I packed up to prepare to leave the Helmer Hanssen at the Ny Alesund research station, Paul was giving his instructions to the scientific team. Some were leaving with me, others staying on for the next section. Coordinating the cleaning of the laboratory and deck areas still well splattered with mud, then the packing up and labeling of the samples and equipment, is a major operation. I thought it better not to whinge about fitting my cameras, recorders and Arctic gear into their bags, which somehow seemed to have shrunk over the past week.

On our last night in dock at Ny Alesund, we were treated (not for the first time this week) to some northern lights, eerily dancing across the black Arctic sky. A wicked wind bit at our faces as we headed once again for the world’s northernmost marine lab. The researchers brought crates of samples. I  myself brought a treasure trove of stories,  ready to go online. The Arctic in winter is harsh but has a charm of its own. It was fascinating to experience the Polar Night, but I was looking forward to my next Arctic destination a bit further south, venue for the major Arctic conference: Arctic Frontiers.

light and land

Back to light and land

I am now in Tromso, Norway’s “Arctic capital”, where the sun will be reappearing above the horizon this week and the magic pink, pale blue, silvery grey and white Arctic light is already in evidence for several hours a day.

Date

January 18, 2015 | 10:31 pm

Share

Feedback

Write a Comment

Ice and mud, glorious mud

IMG_blog2366

Sculpted by nature!

Most of the time our ship is out of range of internet connectivity, so this post will be delivered  to you from the research base Ny Alesund. My hosts and the station staff were  kind enough to arrange a special little boat and a survival suit for a trip through the dark but fascinating polar night. This is only possible because tonight we are still relatively close, with the ship collecting samples in Kongsfjorden, on the north-west side of Spitsbergen. This is an open fjord with a relatively free connection  to adjacent shelf. It’s 20 km long, between 4 and 10 metres wide and a maximum depth of 400 metres. This means it is largely influenced by both Atlantic water and Arctic water. It also gets a discharge of fresh water and sediments from adjacent glaciers, which we will be looking at more closely in the next few days. It has been an action-packed day today, watching polar marine night researchers in action. Night research during the day sounds odd, but I can assure you it is certainly dark enough –at any time of day.

Busy on the deck

Busy on the deck

Muddy secrets Sergei Korsun from St. Petersburg university and PhD student Olga Knyazeva were out on deck preparing a box corer, a  big box-shaped instrument to go down to the seabed and bring up samples of sediment. The teamwork between scientists and crew seems to work brilliantly. The crew operate the lifting and lowering equipment and all sorts of other gear. The scientists collect their samples from it and take them in to the ship’s lab.

IMG_2340

Sergei and Olga hard at work

“Just a load of mud”, quips Sergei, and there is certainly plenty of it sploshing about in the course of the operation. No wonder there are no outdoor shoes allowed inside.

Separate the mud from the mud!

Separate the mud from the mud!

Olga drains off the water so that only the sediment is left. These two are interested in foraminifera or forams, one-celled organisms. Ice Blog readers may remember I discussed them here some time ago, in connection with research on ocean acidification. German scientists actually wrote a children’s story with Tessi and Tipo, two of these tiny ocean creatures, as the main characters. The focus there was on how increasingly acid seas are dissolving the protective shells of many organisms, especially in cold, Arctic water, where the process is faster. Every creature counts! So why should we be interested in these forams in particular? No question about it, says Olga. There are so many of them, they account for a huge proportion of biomass and we know far too little about what they are up to in the winter. Given their important role in the ecosystem, what they do in winter is something we really ought to know. The season of winter is just too long to be ignored any longer, says Olga. And ultimately, even the tiniest creatures play a role in the global foodweb.  Sergei mentions another reason why climatologists and those interested in the history of the planet are so interested in these tiny creatures. They fossilize, so that scientists can use samples from the seafloor to get a record of earth’s history that goes back a very long way.

Shades of blue and dark

Shades of blue and dark

Inner clocks without daylight? Shortly afterwards, I joined  Sören and Lukas from Germany’s Alfred-Wegener  Institute  for one of their  four-hourly net-dropping exercises. For  this, a big hatch is opened on the laboratory deck. This brought added excitement as  there were a lot of beautifully shaped chunks of ice just floating past. Iceblogger’s delight!

Ice bonus!

Ice bonus!

We could also see the hills in silhouette in the background. Clearly there are indeed many shades of “dark”. Seagulls are following us constantly. No doubt they know fish and shrimps are being caught and are always on the lookout for an easy, tasty morsel. In this climate, I don’t blame them. And it is kind of reassuring to have their company, bright in the ship’s lights against the dark sky and sea. The wind felt icy, but the experts up here tell us it is actually relatively mild. Anyway, our two scientists dropped a longish thin net attached to a sort of circular hoop out the hatch, sampling the water.

Getting the net ready

Getting the net ready

When it came in, they take samples of small jellyfish, copepods and krill, for a fascinating project to find out about the “biological clock gene”. How can some marine organisms migrate vertically in a 24-25 hour cycle, without light to trigger this?  More about that when I’ve interviewed the experts over the next couple of days.

Lukas takes a close look.

Lukas takes a close look.

The advantages of winter If you have been waiting for the answer to the question about reproduction in the last blog, I won’t keep you in suspense any longer. Given that the reason is unlikely to be an ideal food supply for the “babies”, some of the scientists on board think the reason could be that there fewer predators about to eat the young, if they arrive in winter. Does that seem plausible? The next post may be a day or two in arriving, as the ship will be out of range from tomorrow onwards. But I promise plenty more to come as soon as we are back in internet range. (How on earth did we live without it?!)

Pick your helmet!

If you want to get ahead… get a (hard) hat! No going on deck without one.

 

Date

January 13, 2015 | 7:41 pm

Share

Feedback

Write a Comment

Food and sex in Svalbard’s icy waters?

The Helmer Hanssen anchored at Ny Alesund

The Helmer Hanssen anchored at Ny Alesund

This is my first post from the Polar Marine Night expedition, from the Kongsfjord in Svalbard.

On the flight from Oslo to Longyearbyen, the main settlement on the island,  after a period with a beautiful sunset red strip in the sky, it was dark by half past midday and I realized I had seen my last sunrays for this week.

The last sunrays on the way north…

Flying in to Longyearbyen airport, I could see a white mountain, its dark silhouette outlined by the airport lights. Having been here before in the summer sun, I realized somewhere up there was the famous seed vault where safe supplies of seeds for the world’s food crops are stored under the permafrost, supposedly safe from wars or some other disastrous calamities which might require a “new start” for humanity. I was fortunate enough to visit it on a previous trip a couple of years ago. At the moment, though, the darkness reveals very little of the fascinating landscape.

plane 105

Winter travel in the High North

New winter visitors to Ny Alesund

Our small, robust propeller plane carrying scientists and service staff from the research station, one fellow journalist as well as two young German scientists joining the scientific cruise had us in Ny Alesund late afternoon. It was strange to see the station completely in the dark, although it is not as deserted as it once was in winter, thanks to this Polar Night research. As our driver told us on the way to the harbour, (nothing is far from anywhere else in the small settlement, but hauling luggage across slippery snow and ice in the dark is something I can do without) there are around 60 people on the base, whereas once there was only a skeleton crew of around 13 over the winter.

The French-German station, the Norwegian station and the Chinese building are manned throughout the winter. The others are summer-only stations. Different scientists from around the globe come in and out for the boat trips to investigate marine life in the polar night. This is only the second year of this heightened interest in life in the dark season up here.

Select company of hardy researchers

crew 148

Members of the crew between shifts on the deck

The RV Helmer Hanssen – named after Amundsen’s navigator to the South Pole – was waiting at the quay. Built as an ice-going fishing vessel, these days the only  trawling done here is in the interests of science. Since we left this evening, nets have been deployed at different levels at regular intervals bringing samples of Arctic sea life on board and into the labs. There are 16 students and professors on board, with a crew of 12 to operate the ship, round the clock. It’s an expensive business, says Stig, so they have to make maximum use of the ship time by working to a busy schedule, sleeping in shifts in between. Well, at least we have enough bunks, so we don’t have to economise by sharing those.

Cruise leader Stig Falk Petersen in the instruments room of the Helmer Hanssen

Cruise leader Stig Falk Petersen in the instruments room of the Helmer Hanssen

Nocturnal goings-on

If I hadn’t done my homework, there were times during the evening briefing by Stig and his colleague Paul Renault, when  I might have been tempted to call for an interpreter , with talk of pelagic trawls, the hyper-benthos,  grabs, diel vertical migration, epibenthic sleds and more of that ilk. Then comes the high-tech LOPC – a laser optical plankton counter, of course! In case you are not a marine biologist yourself, this is all about getting samples from different layers of water and the seabed to find out about the relatively unknown winter lifestyles and behavior of organisms living in the Arctic ocean.  (There was some discussion about supplies of ethanol and formaldehyde, which you must not run out of if you want to take some samples home as a souvenir). It seems amazing, but there is still very little known about marine life in the polar night, because the region was so remote and inaccessible, and because people assumed where there was no light, there would be no biological activity. Now our scientists have discovered (last year was a real “eye-opener”, says Stig) that there is all sorts of activity going on.

Marine looking at the stomach of a tiny fish. Stig looks on.

Marine looking at the stomach of a tiny fish. Stig looks on.

fish stomach 158

What did this 1.5 meter long cod have for dinner?

It does not surprise me personally that a lot of creatures have to feed all the year round. But what exactly do cod, for example eat? That’s what Marine Cusa wants to find out for her PhD. I met her in the lab, where she was dissecting fish. I had a look inside the stomach of a large specimen of Atlantic cod in the lab.

Not for the faint-hearted, so I won’t go into details.  There are even creatures up here who choose to reproduce in this dark season. Now presumably it’s not like with human beings, where there tends to be a rise in the birth-rate after major power cuts in some places. So why would sea creatures choose to have their young in the cold, dark, polar winter? Some of the experts here have some theories – but I’m going to save that for another day.

 

Date

January 13, 2015 | 6:04 pm

Share

Feedback

Write a Comment

Arctic Ocean: “Mare incognitum”

Ny Alesund, Spitsbergen hosts the world's northernmost marine lab. (Quaile, 2007)

Ny Alesund, Spitsbergen hosts the world’s northernmost marine lab. (Quaile, 2007)

As I continue to prepare for my trip to Svalbard and the Arctic waters around the archipelago, into the Polar Night, the title of a website strikes me as particularly appropriate: Mare Incognitum  is the umbrella title for a group of Arctic research projects, including the one I will be joining this weekend at the harbour of the Arctic research base at Ny Alesund, Spitsbergen. The title was chosen to reflect the group’s view of the Arctic as “one of the least known marine ecosystems of the planet”.

Date

January 8, 2015 | 3:56 pm

Share

Feedback

Write a Comment

Polar Ice at UN Bonn Climate Talks

... And the ice continues to melt. (Pic: I. Quaile, Greenland)

… And the ice continues to melt. (Pic: I. Quaile)

The delegates to the UN climate meeting currently taking place here in Bonn are receiving an urgent appeal from polar scientists to cut emissions to slow polar ice melt and give low-lying coastal regions more time to adapt to rising sea levels.

I was very interested to hear about a side-event being held here this evening, at which the authors of this year’s key studies on developments in the Antarctic will be explaining the connections between melting polar ice and climate change impacts like rising seas, affecting regions as diverse as small island states, Bangladesh or Florida in the USA.

I interviewed Anders Levermann from PIK, the Potsdam Institute for Climate Impacts Research and Pam Pearson, Director of ICCI, the International Cryosphere Climate Initiative, both in Bonn for the event.

The ICCI decided to bring the cryosphere into the Bonn talks to sensitize delegates to the dramatic developments in the Antarctic in particular, says Pearson. Ice Blog readers (and I was so delighted to hear Pam herself is one!) will remember posts earlier this year on melting in the East and West Antarctic. I also covered these in articles for DW. The shocking thing is that the Antarctic, even East Antarctica, which was until relatively recently considered so cold it had to be safe from global warming, is already being affected by climate change. The papers on the West Antarctic even described the melt trend as “irreversible”.

We have entered an era of irreversible climate change”.

Today, Anders Levermann, author of the East Antarctic paper and one of the world’s leading Antarctic researchers, told me “we have entered a new era of climate change, witnessed the tipping of the West Antarctic ice sheet, and this is irreversible”.

That should really shock people into action, you would think. But climate negotiations are moving, as one of the experts said to me at the meeting “at a glacial pace”. As we can see in Antarctica, though, and Greenland and other regions, those glaciers are speeding up. Maybe there is hope for the climate talks yet!

The announcements by the USA and China on possible emissions cuts have brought a new “buzz” to the Bonn conference. The fact that the key emitters could finally be getting the message and preparing to move, with the impacts of climate change hitting their own countries, has to be a positive signal. Pearson confirmed to me that people in the sunshine state of Florida, where she lives, had become more aware of the importance of melting ice caps with increasing floods and storms.

As Levermann says, Antarctica and Greenland have a huge potential to raise sea level further than previously anticipated. He was lead author on the IPCC report chapter on sea level rise. The latest IPCC report factored in some of the likely impacts from melting ice in these regions for the first time. Of course the latest research was not yet included. For the 21st century forecast, this will not make a lot of difference, says Levermann. But the fact that this irreversible Antarctic melt is now underway will make a big difference to coming generations.

There are those who dispute whether the warming of the ocean, which is causing the Antarctic melt (unlike the surface melt on Greenland) is man-made. Levermann does not rule out natural variation as a possible influence. But ultimately, he says, that is irrelevant. Greenhouse gas emissions and so human interference are warming the planet, and any further warming, whatever the cause, will speed up ice melt. So cutting emissions is the way to slow it down and, Pearson adds, gives people time to adapt to rising seas.

The combination of models based on the principles of physics, using a higher resolution than ever before, and evidence from ice cores showing what happened in the past, make for a high degree of certainty about these ice developments, says Levermann.

“The level of warming will determine the rate with which we discharge West Antarctica, and we can still prevent the tipping of East Antarctica”, the cryosphere experts told us here in Bonn.

That is a huge responsibility. Here’s hoping the message will make it into the hearts and minds of those negotiating the future of the earth’s climate and the governments they represent.

Date

June 13, 2014 | 2:34 pm

Share

Feedback

Write a Comment