Tag: beaufort sea

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Christine Hedge, September 1, 2009

NOAA Teacher at Sea
Christine Hedge
Onboard USCGC Healy
August 7 – September 16, 2009 

Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey
Location: Beaufort Sea, north of the arctic circle
Date: September 1, 2009

The path of the Healy through the ice with the Louis S. St. Laurent from Canada following (See it way in the distance?)
The path of the Healy through the ice with the Louis S. St. Laurent from Canada following (See it way in the distance?)

Weather Data from the Bridge 
Latitude: 800 26’N
Longitude: 1370 16’W
Temperature: 200 

Science and Technology Log 

Why Are Two Icebreakers Traveling Together? 

All of the countries that have a coastline on the Arctic Ocean are trying to collect data to determine where their extended continental shelf (ECS) ends. One of the types of data needed is called seismic data.  Collecting this information involves towing a long (a kilometer or more) streamer behind the ship. It is difficult to do this well in ice-covered water.  So, the Canadians and the Americans are collecting data together. One icebreaker leads and breaks a path for the second following with the seismic streamer being towed behind.  For most of our trip together, the Healy has broken ice for the Louis S. St. Laurent. We are both collecting data – just different types with different instruments.

FOR MY STUDENTS: Can you name all the countries that have coastlines on the Arctic Ocean? Of which country is Greenland part? 

Why Do We Care Where Our Extended Continental Shelf Is? 

Close-up of the Louis S. St. Laurent collecting data behind the Healy
Close-up of the Louis S. St. Laurent collecting data behind the Healy

The oceans and ocean floors are rich with natural resources.  Some countries obtain much of their wealth from mining the oceans, drilling for oil or gas in the oceans, or from fish or shellfish obtained from the oceans.  Currently, a nation has the right to explore for and harvest all resources in the water and everything on or below the seafloor for 200 nautical miles beyond its shoreline. One nation can allow other nations to use its waters or charge oil companies for the right to drill in its seafloor and thus make money. But what if we could use resources beyond that 200-mile limit? That would add to a country’s wealth. If a country can show with scientific data that the continental shelf extends beyond those 200 miles they can extend their rights over:

 

1) The non-living resources of the seabed and subsoil (minerals, oil, gas)

2) The living resources that are attached to the seabed (clams, corals, scallops ) An extended continental shelf means a nation has rights to more natural resources.

FOR MY STUDENTS: Look at a map of the oceans. Can you find the continental shelf marked on the Atlantic coast of the United States? What types of resources can you think of that we get from the ocean and the seafloor? 

Where Exactly Is the Healy Going? 

The red line shows where the Healy has been. The yellow waypoints show where we might be after September 1, 2009.
The red line shows where the Healy has been. The yellow waypoints show where we might be after September 1, 2009.

Our trail looks random to the untrained eye but it does have a purpose.  We have been helping the Louis get good measurements of the thickness of the sediments on the seafloor.  You see there are certain features of the seafloor that help a nation identify its ECS.  One is related to depth. Another is related to the thickness of the underlying sediments.  Another is related to the place where the continental slope ends (the foot of the slope).  We have been following a path that takes us to the 2500-meter contour (where the ocean is 2500 meters deep) and following a path to measure the thickness of the sediment in the Canada Basin.  I was surprised to think that there was thick sediment on the seafloor in this area.  But, the Arctic is a unique ocean because continents surround it. It is more like a bowl surrounded by land.  As rivers have flowed into the Arctic over millions of years – layers and layers of sediment have covered the Canadian Basin.

FOR MY STUDENTS: Look at your maps again.  Find rivers, bays, fjords, that flow into the Arctic Ocean.  For More Information About The Extended Continental Shelf

Personal Log 

Erin Clark, Canadian Ice Services Specialist has been working with us on the Healy.
Erin Clark, Canadian Ice Services Specialist has been working with us on the Healy.

The U.S and Canada have been sharing personnel as well as sharing a science mission.  Coast Guard personnel and science party personnel have been traveling between the two ships via helicopter to share their expertise.  As the Canadian visitors come through our science lab and eat meals with us – we have had plenty of time to discuss science and everyday life. There has also been a longer-term exchange of personnel.  A scientist from the United States Geological Survey (USGS) has been sailing on the Louis since they left Kugluktuk, Northwest Territories. Dr. Deborah Hutchinson is on the Louis to provide USGS input to scientific decisions made during the cruise.

My roommate, Erin Clark, is a Canadian Ice Services Specialist.  Erin hails from Toronto, Ontario and is staying on the Healy to exchange expertise with the American ice analysts.  It has been interesting getting to know Erin and hearing the story of her career path.  She was one of those kids in school who just couldn’t sit still in a structured classroom environment.  Erin is a visual learner – and often had a hard time proving to her professors that she understood the material as she worked on her degree in Geography.  Where other students used multi-step equations, Erin used diagrams and often didn’t “show her work”.  NOTE TO STUDENTS: Do you know how you learn best?  What is your learning style?

Matthew Vaughan a Canadian geology student from Dalhousie University shows us pictures of the seismic gear on the Louis
Matthew Vaughan a Canadian geology student from Dalhousie University shows us pictures of the seismic gear on the Louis

Erin was lucky enough to have instructors that worked with her and now she is one of about 20 Marine Services Field Ice Observers in Canada. Luckily, she has found a career that offers lots of opportunities to move around. Some of her time is spent analyzing satellite photos of ice on a computer screen, some ice observing from a ship, and some ice observing on helicopter reconnaissance trips.  She communicates what she observes about ice conditions to ships; helping them to navigate safely in ice-covered waters.

FOR MY STUDENTS: What kind of skills do you think an Ice Specialist would need to succeed in their career? 

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Christine Hedge, August 29, 2009

NOAA Teacher at Sea
Christine Hedge
Onboard USCGC Healy
August 7 – September 16, 2009 

Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey
Location: Beaufort Sea, north of the arctic circle
Date: August 29, 2009

Science Party Profile – George Neakok 

George Neakok (left) and Justin Pudenz watch for marine mammals from the bridge of the Healy.
George Neakok (left) and Justin Pudenz watch for marine mammals from the bridge of the Healy.

George Neakok is on board the Healy as our Community Observer from the North Slope Borough. A borough is like a county government.  Except, since Alaska is so huge, the North Slope Borough is roughly the size of the state of Minnesota.  George acts as the eyes of the Inupiat (native people of the North Slope) community while on board the Healy. The Inupiat people are subsistence hunters. They live off the animals and plants of the Arctic and have a real stake in how other people are using the same lands and waters they depend on for survival. George spends hours on the bridge each day looking for life outside the Healy and noting any encounters the ship has with wildlife in general and marine mammals in particular. He is a resident of Barrow, Alaska (one of the 7 villages in the Borough) and has acted as an observer for 2 years traveling on 5 different expeditions. George says he was selected for the Community Observer job because he is a good hunter and has good eyes.  He is too humble.  His life experience has endowed him with fascinating knowledge about the ice, animals, and the Arctic world in general.  George can see a polar bear a kilometer away and know how old it is, how healthy, and what sex.

I asked George to share a little about his life and the kinds of changes he has observed in the Arctic. He has always lived in Barrow except for 2 years when he went away to Kenai Peninsula College to study Petroleum Technology. His dad died while he was away and so he returned home to help his mother.  He has worked in the natural gas fields near Barrow and expects to work in the new field southwest of Barrow in the future.  George has 7 children ranging in age from 20 years to 9 months.  His youngest daughter is adopted, which he says is very common in his culture. There are no orphans.  If a child needs a home, another family will take that child in.  Although his children are being raised in a world with cell phones and snowmobiles – they are still learning to live the way their ancestors have always lived.

Erosion on the coast of Barrow, Alaska is an ever increasing problem.
Erosion on the coast of Barrow, Alaska is an ever increasing problem.

George and his community are a part of  both an ancient and a modern world.  With each season comes another type of food to hunt or collect. The Neakok family hunts caribou, bowhead whale, seals, walrus, beluga, and geese each in its’ own season.  They fish in fresh water and in the Chukchi Sea. They collect berries, roots, greens and eggs, storing them in seal oil to preserve them until they are needed.  Food is stored in ice cellars.  These are underground rooms that can keep food frozen all year round. The animals that are hunted are used for more than just food.  The Inupiat make boats from seal or walrus skin.  In Inupiat culture, the blubber, oil, tusks, baleen and meat are all useful in some way.  If one community has a very successful hunt, they share with their neighbors.  If a community has a bad hunt, they know that other villages will help them out.  Villages come together to meet, celebrate, trade and share what they have caught.  George says this is just the way it is.  People take care of their neighbors.

FOR MY STUDENTS: What can we learn from the people of the North Slope about community? 

A polar bear, spotted by George, travels over thin ice by spreading out his body weight. (Photo courtesy of Pat Kelley USCG)
A polar bear travels over thin ice by spreading out his body weight. (Photo courtesy of Pat Kelley)

George has witnessed much change in his life.  He notes that the seasons are coming earlier and staying later. The shore ice used to start forming in late August but lately it has been forming in late September or early October. When there is less ice close to land, there are fewer animals to hunt.  Whaling off the ice is getting more and more dangerous. The ice is more “rotten” and camping on the ice during the hunt can be treacherous. In recent years, more and more hunters have lost their equipment when the ice gave way.

Erosion of the coastline is another recent problem.  Without ice to protect the shoreline the wave action eats away at the permafrost causing coastlines to collapse.  George has seen a coastal hillside where he used to sled – crumble into the ocean. Entire villages have been moved farther inland as the coastal erosion eats away at the land. George is hopeful that although the Arctic is changing fast, the Inupiat people and culture will handle these changes and continue to live and thrive on the North Slope of Alaska.    

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Christine Hedge, August 28, 2009

NOAA Teacher at Sea
Christine Hedge
Onboard USCGC Healy
August 7 – September 16, 2009 

Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey
Location: Beaufort Sea, north of the arctic circle
Date: August 28, 2009

Weather Data from the Bridge  
Latitude: 840 10’N
Longitude: 1210 30’W
Temperature: 290F

Science and Technology Log 

Sick Bay on the Healy
Sick Bay on the Healy

What Happens If You Get Sick? 

The Sick Bay (medical clinic) on the Healy is the largest and best equipped in the Coast Guard. It has to be, since we are so far from land for such long periods of time.  We have a digital x-ray unit and a cardiac unit for diagnosis, defibrillation, and pacing an irregular heartbeat plus everything needed to keep a patient stabilized and pain free until they can get to a hospital. The Healy is also the only cutter with a permanent Physician’s Assistant (PA) on staff. The most serious medical issues our current PA has had to deal with on the Healy are broken bones and deep gashes. If a patient did have a life threatening injury, they would be kept comfortable until an aircraft could get them to shore. I spoke with Lt. Jason Appleberry (Physician’s Assistant) and HS2 (Health Services Technician) John Wendelschaefer who staff this important part of the ship and asked them about their jobs and their training for working in healthcare on an icebreaker.

Prevention Is the Best Medicine 

HS2 Wendelschaefer shows me Mr. Bones in Sick Bay
HS2 Wendelschaefer shows me Mr. Bones in Sick Bay

The busiest times in Sick Bay are when new people come on board with new germs.  When the crew has time on shore or new crew or science parties join the Healy – colds and other minor inconveniences crop up. The Coast Guard has strict rules about vaccinations for anyone spending time at sea and a very visible strategy to help prevent the spread of germs.  There are hand sanitizer dispensers in the mess (cafeteria) and elsewhere.  Anti-bacterial wipes are available in the gym to wipe down sweaty equipment.  The medical staff inspects the cooks and the galley like a Health Inspector would at a restaurant.  Sick Bay also has an incubator used to test the drinking water for contamination.  And last but not least, every Saturday, everyone cleans!  Heads (bathrooms), staterooms (bedrooms), and the rest of the ship are disinfected and made ready for inspection.  So kids, you have to make your bed and clean your room – even on an icebreaker!!

Profile of the Medical Staff 

I asked Lt. Appleberry how he ended up in this job.  As a young man his career interests included, doctor, paramedic, firefighter and other jobs that combined adventure with a curiosity about science and medicine.  In his words, he wanted to be – “that guy who shows up during a disaster to help.” After a few years of college he spoke to the Coast Guard and thought Coast Guard search and rescue would offer adventure and medicine all in one career.  He enlisted in 1991, and since then has traveled all over the country learning and serving.  Lt. Appleberry earned a Masters degree through the Coast Guard and has been able to use his training in clinics in Kodiak, Alaska and Hawaii and on various ships.

FOR MY STUDENTS:  Have you thought about what kind of career you would like to have? What do you enjoy doing? What activities drain you? What activities invigorate you? 

Part of the mission of the Coast Guard is search and rescue. If someone is hurt on a fishing boat or a pleasure boat is lost at sea, the Coast Guard is there to help. HS2 (kind of like an EMT for civilians) Wendelschaefer has also received his medical training through the Coast Guard.  His experience has been that the Coast Guard is a great place to be a lifelong learner.  There are lots of choices for career paths, tuition assistance, and constant on the job training.  For both men, the Coast Guard has been a positive experience.  They have traveled to and lived in exotic locations, and should they decide to leave the military – they have very marketable skills for the civilian world.

Personal Log 

This is a screen shot of our path as we hit our northern most point. The red line indicates the 840 parallel.
This is a screen shot of our path as we hit our northern most point. The red line indicates the 840 parallel.

Today we hit our northern most point of the trip.  We were north of 840 and as they say, it’s all down hill from here!  This is the closest I will ever get to the North Pole.  Next week we will have a ceremony for all the folks on the ship who have crossed the Arctic Circle for the first time.  This summer I crossed the Tropic of Cancer (look that one up) when I went to Baja, Mexico and the Arctic Circle.  It was easy for me because I had air transportation.  Some animals make migrations like this every year!!!  The gray whale will swim from the Tropic of Cancer to the Chukchi Sea every year without the benefit of an airplane – AMAZING!

FOR MY STUDENTS: Look at a map. Follow 840 North and see where it goes.  Think of all the places you have traveled. How far north have you been?  Figure out your latitude. 

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Christine Hedge, August 26, 2009

NOAA Teacher at Sea
Christine Hedge
Onboard USCGC Healy
August 7 – September 16, 2009 

Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey
Location: Beaufort Sea, north of the arctic circle
Date: August 26, 2009

Science and Technology Log 

This is what we see in the Science Lab of the Healy before the data is processed. It is like a cross-section through the top 50-100 meters of the sea floor. Here you can see it was flat and then climbed uphill. The numbers represent round trip travel time in seconds.
This is what we see in the Science Lab of the Healy before the data is processed. It is like a cross-section through the top 50-100 meters of the sea floor. Here you can see it was flat and then climbed uphill. The numbers represent round trip travel time in seconds.

Is There a Bird in My Room? 

When I first got on the Healy, I thought there was a bird in my room.  Then I realized the chirp that I kept hearing every 9 seconds or so was not just in my room.  It got louder as I went down the ladders to the deepest part of the ship near the laundry. I found out that this chirp is the sound transmitted by the subbottom profiling system.  This instrument is being used on the Healy to collect data about the depth of the water and the nature of the sea floor. These subbottom profiler transducers are mounted on the hull of the ship. The “chirp” sound reflects (echos) off the bottom of the ocean and also reveals the sediment layers below the bottom.  This is one of the systems I watch on a computer screen when I am working.

Using Sound as a Tool to See Inside the Earth 

Sound is an amazing tool in the hands of a geophysicist, who is a person who studies the physics of the earth. The subbottom profiler uses a low frequency sound. Low frequency will penetrate further into the earth than the higher frequencies used by echosounders. This helps scientists to “see” about 50 meters below the surface, depending on the type of sediment (clay, sand, etc).  By looking at how the sound waves are reflected back to the ship, scientists can see layering of sediments, infer sediment type (REMEMBER SAND, SILT, CLAY???), and sometimes see evidence of channels under the sea floor.

The subbottom profiler data is processed and an image is generated for scientists to analyze. This is an image from the 2005 Healy trip to the Arctic. You can see the types of features the sound waves can “see” for us.
The subbottom profiler data is processed and an image is generated for scientists to analyze. This is an image from the 2005 Healy trip to the Arctic. You can see the types of features the sound waves can “see” for us.

FOR MY STUDENTS:  DO YOU REMEMBER STUDYING SOUND IN 6TH GRADE?  WHAT DOES FREQUENCY REFER TO?  

These pictures appear on many doors of the Healy
These pictures appear on many doors of the Healy

Why Is This Important? 

Geologically speaking, the Arctic Basin is poorly understood. We are not sure how some of the major features formed or even where the plate boundaries are.  When you look at maps of the tectonic plates, you might notice that they are not clearly marked in the Arctic. Understanding how the sea floor is shaped and what lies beneath will give us clues to understand the history of the Arctic Basin. From a practical standpoint, geology can tell us where important natural resources might occur. When companies are searching for natural gas or petroleum, they are using clues from the geology of the sea floor to decide where to look.

Personal Log 

More About Sound – From A Personal Perspective 

Lieutenant Commander Doug Petrusa wearing protective headset
Lieutenant Commander Doug Petrusa wearing protective headset

As far as I can tell there is no place on a ship where it is completely silent.  There are fans, air compressors, engines, doors opening and closing and of course on this ship ice breaking and chirping.  There are some places on the ship where we are warned to use ear protection because the machine noise could, over long periods, cause hearing loss.  Many doors on the ship have pictures reminding us to wear ear protection in certain areas to protect our hearing.   The crew spends time working in areas with high intensity noise – so they are often seen wearing protective headsets.

In addition, all over the ship, there are boxes of earplugs. These are available for people to use whenever they need them.  My first week, I slept with earplugs every night.  The constant chirping, the sound of the engines and the doors opening and closing were more than I could handle. I thought I would need to use earplugs for the entire journey. Now, I am sleeping like a baby even with the additional sound of us plowing through ice. I guess the human body can get used to just about anything.

Earplugs are found near every doorway that leads into an area with dangerous noise levels.
Earplugs are found near every doorway that leads into an area with dangerous noise levels.
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Christine Hedge, August 25, 2009

NOAA Teacher at Sea
Christine Hedge
Onboard USCGC Healy
August 7 – September 16, 2009 

Mission: U.S.-Canada 2009 Arctic Seafloor Continental Shelf Survey
Location: Beaufort Sea, north of the arctic circle
Date: August 25, 2009

Weather Data from the Bridge 
Temperature: 30.150F
Latitude: 81.310 N
Longitude: 134.280W

Science and Technology Log 

This multibeam image of the new seamount is what I saw in the Science Lab.
This multibeam image of the new seamount is what I saw in the Science Lab.

A Day of Discovery… 

Today, our planned route took us near an unmapped feature on the sea floor.  A 2002 Russian contour map showed a single contour (a bump in the middle of a flat plain) at 3600 meters.  This single contour line also appeared on the IBCAO (International Bathymetric Chart of the Arctic Ocean) map.  We were so close that we decided to take a slight detour and see if there really was a bump on this flat, featureless stretch of sea floor. 

The contour was labeled 3600 meters and the sea floor in the area averaged about 3800 meters so a 200 meter bump was what the map suggested.  As the Healy traveled over the area we found much more than a bump!  The feature slowly unfolded before our eyes on the computer screen.  It got taller and taller and excitement grew as people realized this might be over 1000 meters tall.  If a feature is 1000 meters or more, it is considered a seamount (underwater mountain) and can be named.  Finally, the picture was complete, the data was processed, and a new seamount was discovered. The height is approximately 1,100 meters and the location is 81.31.57N and 134.28.80W.

The colors on this 3-D image of the newly discovered seamount indicate depth.
The colors on this 3-D image of the newly discovered seamount indicate depth.

Why Isn’t the Arctic Mapped? 

Some areas of the sea floor have been mapped and charted over and over again with each improvement in our bathymetric technology.  Areas with lots of ship traffic such as San Francisco Bay or Chesapeake Bay need to have excellent bathymetric charts, which show depth of the water, and any features on the sea floor that might cause damage to a ship.  But in the Arctic Ocean, there isn’t much ship traffic and it is a difficult place to collect bathymetric data because of all the ice. Therefore, in some areas the maps are based on very sparse soundings from lots of different sources. Remember, older maps are often based on data that was collected before multibeam  echosounders and GPS navigation – new technology means more precise data!  

Personal Log 

This is the IBCAO. (International Bathymetric chart of the Arctic Ocean) It is a great resource for ships exploring the Arctic Basin.
This is the IBCAO. (International Bathymetric chart of the Arctic Ocean) It is a great resource for ships exploring the Arctic Basin.

It is still very foggy. We are about 625 miles north of Alaska and plowing through ice that is 1-2 meters thick.  This time of year it is the melt season.  Increased evaporation means more water in the atmosphere and more fog.  Even though we are usually in water that is 90% covered by ice (REMEMBER 9/10 ice cover?) we rarely have to back and ram to get through.  It is noisier lately and the chunks of ice that pop up beside the ship are more interesting to look at.  There are blue stripes, brown patches of algae and usually a thin layer of snow on top.

I cannot send a current sound file because of our limited bandwidth on the Healy. When we are this far north it is difficult to get Internet access. But, if you would like to hear what it sounds like when the Healy is breaking ice, click on this link  from a past trip through Arctic sea ice.

Sea Ice at 810N after the Healy has broken through
Sea Ice after the Healy has broken through