Geographical area of cruise: Bering Sea and Gulf of Alaska
Date: July 1, 2014
Personal Log
Greetings from Dover, Delaware, the first state to ratify the United States Constitution! My name is Mary Murrian and I teach math and science to a wonderful group of fifth grade students at William Henry Middle School. My journey will begin early in the morning on Wednesday, July 2, 2014. My son, Robert–an upcoming junior at the University of Delaware, is driving me to the Philadelphia airport at 3:00 am in the morning. After transferring planes in Chicago, Illinois and then again in Anchorage, Alaska, I will finally make land at my final destination, Dutch Harbor, Alaska.
If you are a Deadliest Catch fan you will recognize Dutch Harbor as the home base for the popular television show on the Discovery Channel. I will be aboard NOAA Ship Oscar Dyson, a NOAA (National Oceanic and Atmospheric Administration) ship. I have the wonderful opportunity to work with the crew and scientists aboard the Oscar Dyson to research and determine the abundance and health of walleye pollock, one of the largest fisheries in the world. If you have ever eaten fish sticks or imitation seafood, most likely you have tried pollock!
Thanks to the NOAA Teacher at Sea program, I am afforded this wonderful opportunity to work hands-on, learning the science involved in research aboard a NOAA ship. I currently teach a unit on ecosystems, where my students learn about the ecosystem around them and the interrelationships between organisms in an environment focusing on food chains, food webs, and environmental factors that play a role in an ecosystem. This experience will enhance my knowledge of marine ecosystems and the important role the fish play in supporting a healthy and sustainable environment. I look forward to learning and growing through my participation with experts in their field. I want to gather as much information as possible, in order to bring it back to my classroom and share my real life experience with my students this upcoming school year and years to come. What a wonderful way to bring real-life data and experiences to my students.
I have been asked numerous times if I am scared or nervous to be aboard a ship sailing on the Bering Sea. My response, NO! I am thrilled. I cannot wait for my journey to begin. I have cruised to Alaska before, however not as far north as the Dutch Harbor area and I was on a recreational cruise ship. It was beautiful and the scenery was amazing. I never saw ice as blue as I did when we crossed Tracy Arm fjord. A fjord is a typically long, narrow valley with steep sides that are created by advancing glaciers (http://oceanservice.noaa.gov/education/kits/estuaries/media/supp_estuar04_fjord.html). The trip, although freezing, was amazing. I also found out that glacial ice often appears blue because of years of compression gradually making the ice denser over time, forcing out the tiny air pockets between the crystals. When glacier ice becomes extremely dense, the ice absorbs a small amount of red light, leaving a bluish tint in the reflected light (http://nsidc.org/cryosphere/glaciers/quickfacts.html). Super cool!
Sawyer Glacier in Tracy Arm, showing the very blue ice. Photo provided by personnel of the NOAA ship John N. Cobb
I look forward to my upcoming experience, a trip of a lifetime. There is more to come, I hope you will continue with me on my journey across the Gulf of Alaska and the Bering Sea! Watch out Alaska, here I come!
NOAA Teacher at Sea Avery Marvin Aboard NOAA Ship Rainier July 8 — 30, 2013
Mission: Hydrographic Survey Geographical Area of Cruise: Shumagin Islands, Alaska Date: August 8, 2013
Current Location: 57° 47’ 35” N, 152° 23’ 39” W
Personal Log:
My Teacher at Sea experience ended on the island of Kodiak where the Rainier docked for a few days to stock up on supplies and give the crew a much-needed rest. They departed Kodiak 3 days later to begin the next 2-3 wk leg of their survey season. I had the good fortune of staying on the island for 4 days to explore its unique natural landscape and rich cultural history.
As I walked around downtown, perused the storefronts and enjoyed a latte at Harborside Coffee and Goods, one thing was very clear to me: this town is centered around fish, not tourists. Shelikolff drive is an entire street lined with fish processing plants. Trident Seafood, housed inside an old ship sprawls out on the other side of town. The harbor itself is home to over 1000 fishing vessels, ranging from huge 125 foot crab boats to 18 foot set net skiffs. Xtra Tuff fishing boots are the preferred footwear by all the locals and smelling of fish is a natural occurrence.
Kodiak fishing vesselsCrab pot parking spot!Trident seafoodsFish tackleAvery next to a recycled fishAvery at the Alaska/NOAA Fisheries Research Center in Kodiak where a lot of important shellfish research is conducted.Reindeer (Caribou) sausage sandwich–The MOST delicious sauauge I have ever tasted!
When I was in the coffee shop, I noticed a young women in her late twenties with a toddler next to her, writing a letter to her husband who presumably was out at sea fishing. The letter had pictures of her son taped onto it and lots of hearts and colorful doodles–a gentle reminder that living in Kodiak is not for the faint-hearted. The life of a fisherman is physically demanding and maintaining relationships can be trying.
Kodiak has always been an industrious port and its people have always had a strong connection to the ocean. The first people of Kodiak, the Aleut from Kamchatka, inhabited the island 10,000 years ago and lived off the nutrient-rich waters for 7,500 years. They were true “nature engineers” using resources around them for fishing, clothing, dwellings and other needs. Nothing was wasted. Fishing with nets made of nettle fiber and sinew (tendon). Catching bottom dwellers with seaweed line and bone hooks. Using whalebone for door frames and sod for walls. Lighting the way with whale and seal oil lamps. Dressing in mammal skin and intestines.
I had the chance to see many original Aleut artifacts at the Baranov Museum in Kodiak. The most interesting piece was the Kayak splashguard made of mammal skin, the predecessor of the modern nylon kayak skirt used today. The translucent thin waterproof jackets made of mammal intestines also fascinated me. They looked very delicate but were actually strong and flexible when wet. Suspended from the museum ceiling, was an actual seal skin kayak or Bairdarka used by the Aleuts. They wrapped seal skin around a wood frame, tied the seams with sinew and then added a layer of seal oil for waterproofing. Aleut craftsmanship at its finest!
Avery in front of the Baranov Museum (I am waving in the back right.)Baidarka splashguard made of mammal skinAleut waterproof jacket made of mammal intestineAleut kayak or Baidarka
The Aleuts clearly adapted well to their island home, making use of all that surrounded them but never exploiting these resources. Sadly in 1784, this peaceful existence was abruptly terminated by the Russians who, armed with muskets and cannons, took the island by force. Having already decimated both the sea otter and native Aleut population around the Aleutian islands, the Russians under the command of Grigory Ivanovich Shelikhov established a permanent settlement in Three Saints Bay on Kodiak to capitalize on the remaining otter population in North Pacific waters. Following the success of the fur trade industry on Kodiak, the Russians expanded their colonization on the Alaska mainland, establishing several subsequent fur trade centers.
Russian conquest was bittersweet. They brought with them diseases and modern necessities such as flour, tea, tobacco and sugar. They built several structures for their needs including fur warehouses, a school, a hospital, a stone quay, a saw mill and an ice making plant. They forced the Aleuts to be their skilled craftsmen and otter hunters. Between old world diseases, murder and abuse, many Aleuts lost their lives and those left standing witnessed the slow demise of their ancient seafarer culture.
The 126-year Russian occupation of Alaska finally came to an end when tired and poor from the Crimean war with France and England, they sold the territory to the U.S. for 7.2 million (2 cents per acre) in 1867. With high-powered firearms, the Americans continued to slaughter the otters at an unsustainable rate. Teetering on the brink of extinction, an international treaty banning the killing of otters was signed in 1911. Post otter years, Americans tried their hand at other industries including trapping, whaling, clamming, cattle ranching, fox farming and gold mining. Salmon fishing though proved to be the most reliable and profitable natural resource so the U.S. quickly established several salmon processing plants around Kodiak. Wooden dories replaced Baidarkas and by the end of the 19th century, Kodiak had transitioned from a fur-trading hub to a fishing mecca.
Things progressed unchanged until World War II, when Kodiak seen as a strategic waypoint between Asia and the North American west coast, was transformed into a military town. The population went from 400 to several thousand in a short time. A huge self-sufficient navel base was built along with new roads around the island. In preparation for a Japanese attack, several concrete bunkers and underground bomb shelters were constructed. With all of this new infrastructure came indoor plumbing and electricity to the island. When Pearl Harbor was bombed on December 7, 1941 followed by Dutch Harbor on June 3, a Japanese attack on Kodiak seemed imminent but surprisingly the emerald isle went untouched.
Avery in WWII bunker
Today Kodiak remains an important fishing port with a wide variety of crab and fish species (salmon, cod, halibut, Pollack) caught and processed. Modern fishing equipment and boats have replaced older, more natural gear but many of the fishing methods are still the same. Similarly, the factories along Sheikolf Drive have become more automated, with less human hands along each assembly line. Also, the fish industry as a whole on Kodiak has become much more regulated.
Kodiak is a fascinating place to explore because you can see several remnants of its past interspersed around the island: concrete WWII bunkers at Fort Abercrombie, Russian Orthodox church in downtown, old WWII ship anchors lying around, a 200 year old fur warehouse (now the Baranov Museum). Unfortunately, many historical landmarks were destroyed in the 1964 Alaska earthquake. The tsunami that followed the earthquake wreaked more havoc, killing 106 Alaskans and a family of 4 camping at Beverly Beach State Park near Newport, Oregon.
Besides a rich cultural history, Kodiak Island is full of natural beauty and an assortment of cool creatures. Rosalind and I got the chance to explore fossil beach on the south-eastern side of Kodiak where we collected many unique fossils. My top finds were a snail fossil and a shale rock with encased petrified wood.
Avery finds a cool fossil at Fossil beachRosalind at Fossil Beach
After Rosalind left, I was blessed by another Teacher at Sea, Katie Sard, who spent the day with me on a spontaneous adventure around the island. We did all sorts of fun things like tide pooling, checking out WWII bunkers at Fort Abercrombie and eating Greek food at sunset at Monashka bay.
TAS’s Avery and Katie Sard 🙂Fly fisherman in Kodiak Bay
One of the highlights of my entire Alaska trip, was the float plane trip I took to the Kenai Peninsula on the mainland to see Brown bears. These are the 2nd largest bears in the world (next to Polar Bears), living off a rich diet of berries and salmon. I had never been in a float plane before and was impressed by how soft the landing and take off were. The aerial views were also incredible. I spotted 2 Humpback whales on the way over to the peninsula from Kodiak and on the way back another passenger spotted a pod of about 45 Orca whales! The pilot was just as excited as we were, and circled around this giant pod for about 10 minutes giving us all good views of their movement and sheer numbers. Incredible!
Avery in the cockpit with the pilotBear tour seaplaneWading over to the beach
We landed about a football field away from the peninsula, and waded in hip deep water to the beach. The scenery was beautiful with snow-covered mountains as a backdrop and wild flowers and meandering streams in the foreground. This was perfect bear country! Within about 3 hours we saw the Brown bear Trifecta: Brown bear trying to catch salmon, Brown bear mother with 2 cubs and to cap it all off, Brown bears mating. All of these sightings were of different bears and within a stones throw away. I was surprised at how okay the bears were with our close presence. As I learned from my guide, human safety is ensured by the ability to read nonverbal bear clues which can be very subtle. For example, if a bear turns its back to you, it is saying “Please leave me alone.” You also never make eye contact with a bear or walk directly towards it. You want the bear to feel like he/she has plenty of surrounding space and an escape route if need be. Jo, our guide said that in the 20 years of leading bear tours, she has only had to get out her bear spray 3 times. And one of these times involved a naïve group of students eating Subway sandwiches in front of the bears!
Mama and cubs crossing the riverMama and cubsCub staring contestBrown bear in search of salmonBrown bears mating
The last day of my Kodiak stay was spent touring several fish factories where I got to experience the real backbones of this city. At all 3 factories, it was Pink salmon processing time which meant the machines were in full swing, with humans at various checkpoints along each assembly line. The machines did everything from decapitating each salmon to cleaning out its guts to skinning it. Each factory processed about 200,000 pounds of Pink salmon per day. In peak season with several different fish species being processed at once, the factories can see around ¾ million pounds of fish processed per day! At one factory, I learned that the big money comes from making surimi (ground fish) which is used as imitation crab all over the world. The most common fish used in surumi is the Alaska Pollock which is very plentiful in Kodiak waters. I am glad to hear that imitation crab is actually fish and not some other protein filler.
Check out these videos to see the factory process in action. It’s fascinating!!!
Avery gets her hands fishy!Avery at the fish factoryFrozen salmonFrozen aisle at fish factory
As you saw from the above videos, the most hands on section of the whole process is in the production of roe (salmon eggs). This is because the roe must be gently handled and graded (1-3 scale) in preparation to be sold to Japan. At $50 per pound, roe is a delicacy in Japan and often eaten raw over rice or in sushi. Also Pink and Chum salmon produce the most desirable roe called ikura or red caviar. This roe is about the size of a pea and is sold as individual pieces. In contrast, the smaller eggs of Coho and Sockeye salmon produce sujiko, which is roe still connected in the sac. Throughout each of my fish processing plant tours, I was curious to know HOW the roe was graded. To my surprise, none of the factory managers could tell me how and I unfortunately could not communicate with the highly skilled Japanese roe technicians.
So I looked it up and it turns out roe is graded using the following criteria: size (larger is better), salt content (lower is better), drip (zero is best), firmness (firm is better but not so firm the egg breaks), color (bright, red-orange outer color with a center the color and consistency of honey), luster (eggs should be shiny and slightly transparent).
It was fitting to end my Kodiak stay with some down and dirty fish factory tours as this is the lifeblood of the city (and Alaska) and a good representation of the Kodiak spirit. These factories operate 24/7 with workers on their feet for 12 hour shifts. From the Aleuts to now, the Kodiak people have always been a hardy bunch with an incredible work ethic, and the ability to adapt to one of the most challenging environments in the world. This is the ring of fire: weather and natural disasters are unpredictable. So why do people stay? It’s the sea. Beautiful. Vast. Mysterious. Full of life. She calls them back day after day, year after year. Welcome to Kodiak life.
Fun Factoid: The infamous Kodiak brown bear, the sole species of bear on the island of Kodiak, is a sub-species of the Alaskan mainland Brown bear population. Hunters come from all around the world to hunt this sub-species, paying thousands of dollars per expedition.
NOAA Teacher at Sea Marla Crouch Aboard NOAA Ship Oscar Dyson June 8-26, 2013
Mission: Pollock Survey Geographical area of cruise: Gulf of Alaska Date: June 12, 2013
Weather Data from the Bridge: as of 2300
Wind Speed 12.30 kts
Air Temperature 6.10°C
Relative Humidity 98.00%
Barometric Pressure 1,009.6mb
Latitude: 54.22N Longitude: 164.65W
Science and Technology Log
Here I am all decked out in my rain gear in the wet lab, ready to sort the catch of our first bottom trawl. Quite a fashion statement, don’t you think?
Me in my slime gear.
Walleye Pollock (latin name Theragra chalcogramma), a fish that lives both on and above the seafloor, is the main target of the Pollock survey, but information about other sea life is also collected. When we start sorting the catch from this bottom trawl, the primary population is Pacific Ocean Perch (POP, Sebastes alutus). The POP is a member of the Scorpaenidae or scorpionfish family and has poisonous spines. When handling the fish I have to be really careful of the very sharp spines to avoid injury. Fortunately, the POP’s teeth are not as formidable as their spines, so I can grab them by the mouth to safely move them around.
After we sort the catch the total weight of each species is recorded. We collect additional biological data on the POP, by first sorting them by “Blokes” or “Sheilas.” I’ll let you figure out what characterizes Blokes and Sheilas. After the sorting, each fish in the sample is laid on an electronic measuring board (mm) to determine and record the length of the fish. In this survey the length of the fish is measured from the tip of the mouth to the center of the “v” in the tail, this is know as the fork length.
Other populations being sampled are plankton and the jellyfish that were collected in a Methot trawl. Here Abigail McCarthy is sorting two types of zooplankton krill (also called euphausiids) and jellyfish that were collected. Once the sorting is completed, then the quantity and weight of the krill and the jellyfish is recorded. One of the areas Abby is investigating is if there is a correlation between the krill population and the location of baleen feeding whales. Abby wonders how far away the whales can smell or sense dinner? Who can tell me which species of whales are baleen feeders?
Sorting krill and jellyfish
Another tool the scientists use to collect data is a tethered stereo camera that takes 10 pictures/second. Using the pictures I am counting and sorting fish by species. Look at the pictures and you’ll see a Gorgonia sea fan and a basket star. The camera has a stationary photo length, so objects closer to the camera appear bigger. In the picture with the sea fan, you are also seeing krill. You can use the pairs of images from the stereo cameras to measure the size of the organisms that appear in the images.
The two cylinders in the center are the cameras and the four other cylinders are strobe lights.The sea fan is a member of the soft coral family. Krill can be seen in front of the sea fan. Picture provided by NOAA.The basket star is a type of sea star. Here the basket star is perched on top of a sea sponge open waiting for dinner to drift by. Picture provided by NOAA
Personal Log
When the Oscar Dyson sailed from Dutch Harbor we head west to the Islands of Four Mountains, a cluster of volcanic isles. On one isles is Mt. Cleveland, which on May 5th was actively spewing lava. As we pass, Mt. Cleveland is quietly shrouded in dense cloud cover. Darn, cannot check eruption off my “Want to see” list. I don’t think I’ll see an aurora either as the cloud cover has been thick.
This is the south side of Unalaska. Dutch Harbor is on north side facing the Bering Sea.
Science aboard the Oscar Dyson runs 24/7. Both the Dyson’s crew and the science team work in twelve hour shifts. For the Dyson’s crew the day is broken into two shifts, from midnight to noon and noon to midnight. The science team shifts are from 4 a.m. (0400 hrs.) to 4 p.m. (1600 hrs.) and 1600 hrs. to 0400 hrs. I am on the 1600hrs to 0400hrs shift; morning and night run all together. A note here, when the scientists collect data the time stamp is Greenwich Mean Time (GMT). GMT is eight hours ahead of us here in Alaska.
Did You Know?
I’ve discovered that you can slosh in your berth. Check out the next blog for “Surf Your Berth.”
NOAA Teacher at Sea Marla Crouch Aboard NOAA Ship Oscar Dyson June 8-26, 2013
Mission: Pollock Survey Geographical area of cruise: Gulf of Alaska Date: June 8, 2013
Weather Data from the Bridge: as of 1900
Wind Speed 9.57 kts
Air Temperature 6.84°C
Relative Humidity 81.00%
Barometric Pressure 1,030.5 mb
Latitude: 53.52N Longitude: 166.34W
Science and Technology Log
The Oscar Dyson is harbored in Captains Bay and there is much to do aboard before we set sail on our cruise. Some equipment needs to be off loaded and stored while other equipment needs to be loaded and secured. The Science Team checks their berth (room) assignments, drop off their gear, and begin the task of readying the equipment.
“What are the properties of sea water?” Are you thinking liquid? There are three properties that scientists routinely check, they are temperature, salinity and density. The Dyson’s crew deploys an instrument referred to as the CTD. The CTD contains sensors which continuously measure the Conductivity, Temperature and Depth of the water. The CTD is sent to the bottom to create a profile of the temperature and salinity (as measured by how well the water conducts electricity or its ‘conductivity’) and then is brought back to the surface. On the way back up water samples are collected at per determined depths, in the grey bottles. The collected water samples are measured to calibrate the sensors on the CTD. This information is then used to calibrate the sonar.
There are five grey water sample bottles on this CTD.
Sonar uses sound waves called pings that bounce off objects creating echoes. The echoes are recorded and used to create pictures of the sea floor and other object, such as schools of fish. To calibrate the sonar a round shiny ball that reflects the pings is submerged beneath the ship. The scientists know the expected strength of the echo from the sphere given the water temperature and salinity, allowing them to calibrate the sonar. Sometimes fish interfere with the calibration process. Fish are curious creatures and want to investigate the shiny sphere, getting in the way of the pings and slowing down calibration.
When the calibrations have been completed we set sail. As the Dyson sailed out of Captains Bay, we encountered dolphins jumping out of the water and whales surfacing. Perhaps they were feeding on the large school of fish seen in the sonar.
The sonar shows the sea floor, the band of blue, yellow and red. The schools of fish are the pink groupings. The water depth is 123.23m.
Personal Log
Before leaving Seattle, I was told my luggage might not be on the same flight as I was on into Dutch Harbor. The airport in ‘Dutch’ has a short runway and is serviced by turbo prop aircraft that seat 33 passengers. When I checked in, I was asked for my weight and any carry-on. The airline uses the total loaded weight of the aircraft to calculate how much runway is needed to take off and how much fuel is needed to reach the next refueling point. Upon boarding the plane, the passengers were told that 87 pounds of luggage would not make the flight and more than likely the bags would be on tomorrow morning’s freighter– weather and volcanic activity permitting! I kept my fingers crossed that my bag was in the cargo hold. A little over an hour into the flight, we landed in King Salmon for refueling. Shortly after landing, we were once again airborne for the 1 ½ hour flight to Dutch Harbor. In route along the volcanic chain of Aleutian Islands, you can see peaks visibly venting steam and Mt. Pavlof’s snowy surface is blackened with fresh ash. The Oscar Dyson will sail past several of these active volcanoes. Looks like I’ll be adding a volcanic eruption to my list of “want to see” while aboard the Dyson. I am also hoping to see the Aurora Borealis and pods of Humpback and Orca whales. Landing at Dutch Harbor I realized why weather is a crucial factor for safe touch downs. A section of Mt. Ballyhoo has been blasted away to make room for the runway. Peering out the window, one gets the feeling that the tip of the wing is barely whisking past the face of the cliff. On the other side of the runway is the water of Iliuliuk Bay. Good news, my luggage and I landed at the same time!
Dutch Harbor attracts many bird watchers, as bald eagles, puffins, rock ptarmigans and other birds are abundant here. Juvenile bald eagles are dappled brown and white and blend into the rocky shore and crags of the steep cliffs. This time of year, signs warning of nesting eagles are also abundant. As birds tend to use me for target practice I am very mindful of the warnings.
Thankfully, I was not dive bombed by any eagles or other birds!At least 3 eagles are in this picture one adult and two juveniles. Can you find all three?
Before boarding the Oscar Dyson I visited the Museum of the Aleutians. The exhibits feature information about life and culture in the Aleutians and how WWII impacted the people. One of the displays featured several handmade parkas constructed from the gut (intestine) of seals and walruses. The material is both light weight and water proof.
Parka made of gut.
Just south of the museum is Bunker Hill towers above Dutch Harbor, and one can still see the zigzag pattern of the WWII trenches etched into the landscape. There is a trail to the bunker atop the hill; I think I’ll go for a walk. Almost to the top of Bunker Hill about 700 feet above Dutch Harbor the panoramic vistas of Captains Bay, Dutch Harbor and the City Unalaska are spectacular.
Taken about half way up Bunker Hill.Bunker atop Bunker Hill
Did You Know?
The Gulf of Alaska helps to generate much of the seasonal rainfall along the west coast of British Columbia, Washington, and Oregon. The strong surface currents, as high as 1.7kph (1.9mph) in the southern reaches combine with the cold arctic air to create these weather systems that affect our weather and climate.
NOAA Teacher at Sea Amanda Peretich Aboard Oscar Dyson June 30 – July 18, 2012
Mission: Pollock Survey Geographical area of cruise: Bering Sea Date: July 22, 2012
Water collection bottles with samples from CTDs throughout the cruise.
Location Data
Myself: airports, airplanes, and Maryland Oscar Dyson: Crowley pier in Dutch Harbor, AK
Science & Technology Log On July 17, as we were “cruising” around 12 knots back to Dutch Harbor, Alaska, I had one more GREAT tie in to chemistry class that I just wanted to share because it was that cool to me! Every few CTDs, a water sample would be collected to later be tested for levels of dissolved oxygen. At the end of the cruise on our way back, Bill allowed me to watch him test those samples using a Winkler titration.
Why do we care how much dissolved oxygen is in the water in the first place? Dissolved oxygen levels provide an excellent indication of the underwater biological activity. If levels are extremely low (2 mg/L or lower), animals fail to survive during this “hypoxia”. If there is no dissolved oxygen at all (0 mg/L), this is known as “anoxia”, meaning without oxygen. Areas that are hypoxic or anoxic are known as “dead zones”. Luckily there aren’t really any reported dead zones around Alaska, but knowing the level of dissolved oxygen is important to the scientists as another piece of data to analyze from this cruise.
How does the Winkler titration work and why did I find it so cool? First off, in chemistry class, we use a buret to add a titrant manually drop by drop into a solution containing a phenolphthalein indicator that turns from clear to pink to signify the endpoint of the titration. On board, the actual titration is automated and there is no indicator! It was nice to see chemistry in action, and even nicer to see the process automated, removing any human error in the actual titration.
Set-up for the Winkler titration on the Oscar Dyson.
Steps to performing the Winkler titration on the Oscar Dyson: 1. Collect water sample during CTD and add manganese chloride (MnCl2) and sodium iodide/sodium hydroxide solution (NaI/NaOH) to sample. Stopper and mix well. 2. Store all water samples for testing at the end of the cruise (this is how it’s done on the Oscar Dyson to test all samples at once, although you could test them each individually after collection). 3. When ready to test all samples, remove stopper and add magnetic stir bar and 1mL of sulfuric acid (H2SO4). Mix well. If precipitate does not completely dissolve, add more sulfuric acid. 4. Titrate and record results! 5. Repeat steps 3 and 4 for each sample 🙂
(a) The addition of excess manganese, iodide, and hydroxide ions added to each water sample forms a precipitate (solid), which is then oxidized by the dissolved oxygen in the water sample. (b) and (c) A strong acid acidifies the solution and converts the iodide ion (I-1) into an iodine molecule (I2), causing the precipitate to dissolve (b) and the solution to turn brownish-orange (c). (d) The solution is put on top of a stir plate and titrated with a thiosulfate solution. The titration is complete when the solution is neutralized, or there are no more ions remaining in solution. This is determined by measuring the conductivity of the solution because ions allow conductivity so when the solution is neutralized, there will be no conductivity. You can see the conductivity probe in the top of the solution on the right and the thiosulfate being added into the solution through the tube on the left.
Personal Log
My final days/adventures in Dutch Harbor? Enjoy the brief descriptions and photos below!
July 18
– arrived in Dutch early morning to beautiful blue skies all day and I watched as the Dyson docked at Crowley pier
– another Alaskan water adventure when Brian and I donned arctic survival suits, got in Captain’s Bay, and yelled up drafting readings of the water level from various points on the outside of the ship to Neal (while Chelsea took photos)
– went for a run over to Unalaska to see the Russian Orthodox church, walk along the beach, go to Memorial Park, check out some gravestones, and jog around town
– hung out in Dutch with some people off the Dyson, where Brian turned into Billy Idol, Chelsea got a new ‘do, and Kevin got a haircut
July 18: Dutch Harbor, Alaska
July 19
– the day started off looking bleak, and I got covered in mud running back into Captain’s Bay to check out the gigantic oil rig barge
– then it turned into another afternoon of beautiful blue skies to allow me to hike with Brian to the back of Captain’s Bay and up to a really pretty waterfall
– hung out in Dutch with some locals I’d met the night before, including an Aleut with the nose ring and face tattoo
July 19: Dutch Harbor, Alaska
July 20
– was supposed to fly out this afternoon but lo and behold, the skies turned gray, the fog rolled in, all flights in and out of Dutch were cancelled for the day, and I headed back to the ship
– hung out in Dutch with some people off the Dyson and celebrated Patrick’s birthday
July 20: Dutch Harbor, AlaskaJuly 21: Anchorage airport
July 21
– attempted to get on flights from standby multiple times throughout the day, and finally got on a flight at 8:45pm that got me to Anchorage after midnight, where I slept on a bench in the airport until about 4am
July 22
– no flights out of Anchorage available until almost 9pm! luckily I called Delta, got on standby for a 6am flight where enough people took a later flight (and everyone on standby ahead of me was in pairs) that I got out of Anchorage and to Minneapolis, where I had about 35 minutes to get on standby for another flight that I was able to get on as well; the flight goddesses were with me today
– arrived home to Maryland about 20 hours after leaving Dutch, happy to be back but sad this adventure is officially over
THANKS THANKS THANKS I’d just like to say one last time how AMAZING this adventure was on the Oscar Dyson and how incredibly BLESSED I was to meet such great people and learn some many new and EXCITING things. I owe a huge amount of thanks to plenty of people: * Thanks to the chief scientist Neal along with Bill and Anatoli for all of the fun science and fish stuff I learned during my shift * Thanks to the rest of the science party (Scott, Denise, Carwyn, and Nate) for more science and technology that I learned and for the card games I played after my shift and to Kathy for doing her survey tech thing (and helping me find my luggage and get to the airport on time) * Thanks to the CO CDR Mark Boland for allowing me to be on the OD in the first place and for always seeming to have a smile on your face when I was around * Thanks to the XO 1M Kris Mackie for all of his help in getting me to the ship, for never sugar-coating life, for a great espresso machine in the galley, and for life lessons, knowledge, and personal growth he probably doesn’t even know he taught me * Thanks to the OPS LT Matt Davis for reading and approving all of the blogs and for the vast amount of knowledge I gained from him in multiple aspects of ship life * Thanks to ENS Libby, Kevin, and Chelsea for plenty of information, stories, good laughs, and great memories * Thanks to LTJG Dave for recommending thought-provoking movies and answering all my questions * Thanks to the engineering crew (Brent, Tony, Vincente, Garry, Robert, Terry, Joel) for all of their hard work that kept the ship running during the entire trip and for everything you guys taught me * Thanks to Vince for keeping the internet up and running so I could update my blogs, get on facebook, and let my parents know I was still alive with the VOIP * Thanks to the stewards Tim and Adam for some of the best cooking I’ve had in a long time and for “encouraging” me try things I didn’t think I liked but wound up enjoying because you made them so delicious * Thanks to the deck crew (Willie, Patrick, Deeno, Jim, Brian, and Rick) for putting up with my incessant chatter, photo taking, curiosity, and questions, for letting me crash your table at mealtimes, and for every little thing that you’ve each taught me, even if you didn’t know you were teaching me something at the time * Thanks to GVA Brian for all the photos he took whenever I asked, for the awesome headphones he let me borrow most of the trip, for the knowledge he shared about everything he knew related to boats and fishing, and for adventures kayaking, taking draft readings, and hiking in Dutch * Thanks to the NOAA Teacher at Sea program for providing this incredible opportunity in the first place * Thanks to everyone that has been reading (and sometimes commenting on) my blogs
NOAA Oscar Dyson in Captains Bay, Dutch Harbor, AK