Categories
Exploring Ocean Worlds

By-the-Wind Sailors

Plastic washes up on the beach in Manzanita, Oregon. Image Credit: Jenny Woodman

Years ago, I sat on a beach in Maremma, Italy, sifting the sand through my fingers — marveling at the multitude of colors. It was ancient mountains reduced to sediment and ferried to the beach. It was terra cotta roof slates and brightly hued ceramic tiles from the Amalfi coast, transformed by salt, wind, and waves into freckles of color in the palm of my hand. I brought a small amount of sand home in a jar, but the magic was lost in transit. Today, I am not confronted with the remnants of beautiful medieval cities here on this western shore in Oregon. There is no lovely evocative name for what crunches beneath my feet: plastic. Carried by currents, it accumulates at the water’s edge.

Beyond the horizon exists a floating gyre, called the Great Pacific Garbage Patch by some; others name it the Pacific Trash Vortex. It’s much larger than Texas and has cousins of similar size in the Atlantic and Indian oceans. They are composed mostly of plastic, which floats and flows with the currents, converging where they meet. Ultraviolet light and the ocean environment cause the substance to break down and infiltrate ocean creatures and habitats in ways we have yet to fully understand.

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Image Credit: Jenny Woodman

The World Economic Forum says that by 2050, plastic in the ocean will outweigh fish.

I worry and wonder: where will we go when the ocean no longer offers a home and solace for even the smallest of living things? These thoughts propel me on my walk this spring morning, along my favorite beach in Oregon. Then, I spot something else.

From a distance, it looks as if the beach is covered in litter — like raucous partygoers retreated with the tide, leaving the cleanup for someone else. Intermingled with bits of brightly colored plastic, a closer inspection reveals that the curvy line extending for as far as I can see is a mass stranding of tiny little organisms called Velella velella.

Like the Portuguese man-of-war, but smaller, these hydroids live in large colonies out in the open ocean, drifting en masse along the surface of the water, much like those amorphous plastic gyres, but living. Protected by a deep blue pigment that acts as natural sunscreen, the critters flood the U.S. Coast Guard office with false hazard reports during those spring months when folks mistake the floating, giant blue blob heading toward the beach for an oil spill.

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Velella velella or by-the-wind sailors. Image Credit: Jenny Woodman

They are also called by-the-wind sailors – nicknamed for the tiny sail-like fin on top of the flat disc that forms the organism’s body. One oceanographer says that the angle of the sail is determined by where the velella grows in relation to land, so that it can tack away from shores. Out in the open water, wind gently propels the critters along the ocean’s surface, but spring and early summer winds, especially during El Niño years, blanket coastlines with millions of these wayward sailors.

Velella are always floating, for lack of a more accurate expression, face down with short, sticky tentacles that enable them to catch and feed on other pelagic organisms. When there is no food readily available, the sailors use photosynthesis to grow algae, which their jellyfish-like offspring consume.

IMG_2912I can’t help but think about perspective and what it might be like to have the ocean below you as your world-view – like an astronaut floating in lower Earth orbit looking down on this ever-changing terrain. It might be all right if one weren’t at the mercy of such powerful forces like wind, ocean storms, and the sort of human carelessness that chokes our ocean ecosystems with plastic.

This essay was originally published in IEEE Earthzine; it has been updated and revised.


Jenny Woodman is a writer and educator who would rather be at the Oregon Coast than just about anywhere else. Follow her on Twitter @JennyWoodman


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The Secret Life of Velella: Adrift with the by-the-wind sailor, video by Monterey Bay Aquarium Research Institute

Categories
Exploring Ocean Worlds

Ocean Exploration Fueled by Girl Power

This photo essay-letter was created on board the Exploration Vessel Nautilus during the 2018 Lōihi Seamount Expedition, a joint project between Ocean Exploration Trust, NASA, NOAA, and a number of academic institutions. The mission used this underwater volcano off the coast of Hawai`i as an analog for future space exploration to distant ocean worlds. Click on photo captions to scroll through the images and read more detailed bios of these phenomenal women working in science, technology, engineering, arts, and math fields.

Dear 2nd Graders,

I really enjoyed speaking with your class this morning. It is always fun to tell people about the work we are doing on board the Exploration Vessel (E/V) Nautilus, a 211-foot science vessel outfitted for exploring the ocean floor with robots and studying what is happening in our planet’s ocean.

After we ended our talk with you, one of your comments stuck with me. Your teacher asked me to speak about what girls do on our ship, adding that you all thought only boys could be engineers and that made me a little sad.

As a matter of fact, I couldn’t sleep for quite some time even though it was 4:30 in the morning here off the coast of Hawai`i. But, I woke up with a plan: I’d gather all the girls on our ship (there are a lot of us) and take a photo for you. I thought maybe if you saw how many girls are out here doing exciting work, you might start to see how many important things get done by both boys and girls.

But there was one really big problem…

All the girls working on the Nautilus are very, very busy. Eighteen members of the 31-person science team on the Nautilus are women. We serve in all roles — from engineering to communications, from the very highest leadership position down to our student interns. There is no place on the Nautilus where women do not work incredibly hard.

I went to the back deck of the ship where Wendy, Jess, and Antonella were busy repairing our robots, Hercules and Argus. Without these robots, (we also call them remotely operated vehicles or ROVs) we wouldn’t be able to travel to the ocean floor to learn about volcanoes, octopuses, sharks, and creatures no one has ever seen before. As ROV pilots, a big part of their job is maintaining and fixing the ROVs – Wendy, Jess, and Antonella are engineers, so they are really good at what they do!

I ducked around the corner and up the stairs, following Mary and Nicole, but it turned out they were busy too. A camera needed fixing, and as video engineers, they needed to tackle the job. Cameras are very important to the work happening on the Nautilus; they are like eyes on the robots and they help the pilots to safely move around; cameras also record all the amazing images from places humans can’t safely go. As a retired journalist and video engineer, Mary has lots of experience to help guide and train Nicole who just graduated from college.

Our science data team — Leigh and Megan were also quite busy. They spent part of the afternoon brainstorming how to manage the thousands of images and samples being gathered with each dive, and they met with expedition leaders to share their ideas about how to do even more with the limited space available for so many scientists on the ship.

Then, I went to the wet lab, but another member of the science data team, Brianna, was busy organizing the equipment the science team uses after Hercules collects those samples and brings them back to the ship; one of her jobs is to prepare those specimens for scientists all over the country to study back on dry land.

I ran over to the social deck, just in time to see Elizabeth rushing off to her lab. She had to place a bottle of seawater in an incubator, which is like a small oven. She wanted to test how long it will take her to process the samples Hercules will bring up to the ship from the volcano.

I was sure I’d be able to wrangle Sam and Nicole, but as part of the leadership responsible for the success of this and future expeditions, they were busy coordinating the hundreds of items that need addressing each day.

Speaking of the people who help this ship run smoothly, Thais and Martyna are officers in charge of running the ship so all this amazing science can happen. Today, Martyna took a crew out on a small boat to inspect the hull, and Thais makes sure everyone on the ship is safe at all times.

My friends Ariel and Mugdha were also busy, shooting video to help tell the story of science, ocean exploration, and marvelous feats of engineering.

Even I had to stop and take a break from writing this letter to you; Amy and I were needed in the studio where you saw us this morning. We had to talk to a group of people gathered at a museum in San Francisco – we showed them pictures and answered their questions just as we answered yours.

My last stop on this adventure was the lounge where Darlene was sitting at her laptop on a big leather sofa. As principle investigator for this project, her days are really long – she’s working even when she looks like she might be relaxing. When I found her, she was getting ready to go on NASA TV and talk about the work we are doing; two million people tuned in to watch her today!

I’m writing this letter because I’d hate to think that there are any young girls in your class who think it isn’t cool or possible for them to build robots or rockets, and I’d hate to think that there are boys who think they shouldn’t do the thing they dream about doing, whatever it may be.

Following science out to sea has taken me to some pretty extraordinary places. Image Credit: Jenny Woodman

And, if you don’t want to be a scientist or engineer, but you love the sea creatures — if you dream about what it might be like explore the ocean, I have a secret for you: not everyone involved studying the ocean is a scientist or engineer. I’m a writer. My job is telling true stories about this work so people can better understand the world we live in. Folks like me — anthropologists, painters, teachers, filmmakers, chefs, and all sorts of people play a big part, making amazing things happen every day for organizations like the Nautilus!

Thanks for asking us such smart questions. I hope you will stay curious, have fun and keep exploring!

Jenny


Jenny Woodman, Proteus founder and executive director, is a science writer and educator living in the Pacific Northwest; she is a 2018 lead science communication fellow on board the Exploration Vessel Nautilus. In 2016, she wrote her masters thesis on women in STEAM and continues to explore this topic in her work. Follow her on Twitter @JennyWoodman.


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Categories
Exploring Ocean Worlds

Underway

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This image of Jupiter’s Europa moon was captured by NASA’s Galileo spacecraft in the late 1990s; scientists are studying deep sea volcanoes on Earth in preparation for future exploration to places like Europa where they expect to find oceans and hydrothermal activity beneath the moon’s surface. Image Credit: NASA/JPL-Caltech/SETI Institute

On August 21, a team of scientists, engineers, and students arrived in waves, loaded with personal gear and equipment for deep sea exploration off the coast of Hawaii. The mission, a joint project with NASA, NOAA, Ocean Exploration Trust and a number of academic institutions, is to explore the Lōihi Seamount with remotely operated vehicles, or robots.

Conditions at this underwater volcano are similar to what scientists believe exist on moons in the outer regions of our solar system. Experts from NASA’s Systematic Underwater Biogeochemical Science and Exploration Analog (SUBSEA) team think it is likely that oceans and hydrothermal activity exist beneath an icy crust on Saturn’s Enceladus and Jupiter’s Europa.

Robotic dives at Lōihi also offer the opportunity to practice and develop protocols for future missions. Someday, when we reach distant ocean worlds, it is unlikely that humans will be able to enter into these hostile environments; it is more likely that they will deploy robots and explore from the safety of their ship or some other location, much like ocean explorers do today.

In order to develop protocols to guide those future missions, NASA and their partners have gathered a science team at the Inner Space Center at Rhode Island Graduate School of Oceanography; this team will remotely oversee and direct operations on the Exploration Vessel (E/V) Nautilus here in Hawaii. The work will serve as an analog for expeditions where astronauts will communicate across great distances. Experiencing delays and possible technical difficulties first-hand on Earth will enable NASA and their partners to be better prepared for the challenges of deep space exploration.

Back on board the Nautilus last Monday, there were hugs and laughs as those who had sailed on the ship reunited and newcomers were introduced. We were eager to get going, but Hurricane Lane had other plans. The storm intensified and the Coast Guard ordered all ships over a certain size out of the port of Honolulu. Nicole Raineault, vice president of exploration and science operations for the Ocean Exploration Trust shared the news that expedition leaders and the ship’s captain, Pavel Chubar, didn’t feel the science team would be safe on board the ship during the storm. The Nautilus was going to ride out the weather in safer waters north of Maui, but the seas would be rough nonetheless – it was not going to be a place for non-professional mariners.

On Wednesday August 22, we repacked our gear, secured science equipment on the ship, and offloaded in Honolulu. As stores and restaurants closed all over Waikiki where we were staying, it was surreal to see the images of an immense storm heading our way while tourists poured in and out of the shops. The island chain is no stranger to powerful storms, but the last major hurricane occurred in 1992; Hurricane Iniki caused $3.1 billion in damage.

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Hurricane Lane from the International Space Station. Image Credit: NASA

Lane was expected to hit Hawaii on Friday or Saturday, so we stocked up on food and water in case the storm disrupted power and transportation. (Experts recommend your family’s disaster supplies include one gallon of water per person, per day as well as enough food, medicine, and creature comforts like activities for little ones to last at least two weeks. For more on how to prepare your family for disaster visit here and here.)

The slow-moving storm never made landfall on O’ahu, but caused catastrophic flooding to the Big Island, dumping over 50 inches of rain in just a few days.

On August 26, we were transported to the Nautilus via water taxi and immediately set off as teams worked to prepare equipment for operations on Monday morning. The seas weren’t quite as calm as most would like and many napped and stared at the horizon in an effort to quell uneasy stomachs. Most over the counter motion sickness medicines cause drowsiness (and mine was no exception — although the box was labeled “less-drowsy,” it would be more apt if it read “may cause light coma”).

The E/V Nautilus underway, heading towards the Kilauea lava flow. Image Credit: Jenny Woodman

We’re now our way to the Kilauea lava flow, a slow-moving eruption that has caused extensive damage to the Big Island since early spring. Data from the previous Nautilus expedition, Mapping Pacific Seamounts, included signals that look like little bubbles, which they’d never seen before.

Chris German is a senior scientist at Woods Hole Oceanographic Institute and leader of the science data team for this expedition. “It is a process we’ve not had the chance to study previously,” German added as he explained that they are returning to the same spot in order to see if those mysterious bubbles are still present.

He and his team are eager to determine an ideal location future dives. The Nautilus team uses sonar mapping technology to both enhance our understanding of the processes occurring on the ocean floor and to accurately identify where to deploy the robots for exploration. “This may be another kind of hydrothermal system nobody’s ever seen before,” German added with a grin.

We expect to be able to see the flow area from a distance after breakfast Monday morning, and we’re looking forward to launching our first dive operation on the Lōihi Seamount at midnight (HTC) Tuesday morning. Whenever the robots are deployed, the video feed is live-streamed to viewers all over the world at www.nautiluslive.org. 


Jenny Woodman, Proteus founder and executive director, is a science writer and educator living in the Pacific Northwest; she is a 2018 lead science communication fellow on board the Exploration Vessel Nautilus. Follower her on Twitter @JennyWoodman.


This piece was updated on August 27.

Read more

Discovering Ocean Worlds by Jenny Woodman
Ocean Worlds by NASA Jet Propulsion Laboratory

Categories
Arctic Change

Long-term Decline Accelerates in Arctic

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George collecting data at nesting case in 2015; the cases were added once polar bears became regular visits on the island. Image Credit: George Divoky

The Cooper Island Black Guillemot colony experiences a major decrease in breeding pairs as long-term decline accelerates.

As of July 6, egg laying ended at the Cooper Island colony and the number of breeding pairs is the lowest it has been in four decades. Only 50 guillemot pairs have laid eggs, down from 85 pairs last year, 100 pairs in 2016 and 200 pairs in the late 1980s.

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Cooper Island breeding pairs over the years; it is important to note that the number of available sites has not decreased as the population has decreased, meaning some environmental factor has likely been decreasing the population. Image Credit: Jenny Woodman

A primary reason for the decline was increased overwinter mortality, with almost one third of the last year’s breeders failing to return to the colony. The long-term average for overwinter mortality is ten percent. Also contributing to the decline was a paucity of recruits to occupy the vacancies created by the mortality. Many of this year’s pairs are composed of two birds that lost mates over the winter. All recruitment that did occur were of birds that had fledged from Cooper Island. Immigrants used to constitute the majority of birds recruited into the breeding population.

A potential reason for the high mortality is the lack of sea ice in the area traditionally occupied by Cooper Island guillemots in winter. The unprecedented lack of sea ice over the Bering Sea shelf likely forced birds to occupy the ice edge in the Arctic Basin north of the Bering Strait, where prey resources may not be as abundant.

The 15 geolocators recently removed from returning birds will allow determination of the winter distribution.

The number of breeding pairs also declined due to the number of pairs maintaining nest sites but failing to lay eggs. Nonbreeding by experienced birds and established pairs has been extremely rare on Cooper Island but this year there are 20 such pairs. The presence of such birds, unable to initiate clutches after occupying a nest site, is an indication that overwinter or spring conditions caused both a decrease in the condition of returning birds as well as increased mortality.

Eggs will begin hatching in the third week of July and one has to hope fledging success will be high.


This field report is part of an ongoing series titled Arctic Change centered around George Divoky’s 44th field season studying Black Guillemots, sea ice, and climate change on a remote Arctic island off the coast of Alaska. To donate and support Divoky’s work on Cooper Island, visit the Friends of Cooper Island website.


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The Earliest Year by George Divoky

Summertime and the Sea Ice is Leaving by Jenny Woodman

In the Arctic, the Old Ice Is Disappearing by Jeremy White and Kendra Pierre-Louis (2018)

Sea Ice by Michon Scott and Kathryn Hansen for NASA Earth Observatory

Categories
Exploring Ocean Worlds Sea Sentries

Finding My Sea Legs and an Awkward Encounter with a Gumby Suit

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Pelicans flying near Gate Bridge in San Francisco. Image Credit: Jenny Woodman/ACCESS/NOAA/Point Blue

We sailed under the Golden Gate Bridge in San Francisco just before 11 a.m. on July 3. Anyone without immediate tasks to perform worked on finding their sea legs while we transited to our first location.

For me, this included several hours becoming one with my berth as this was the only place where I didn’t feel as if my stomach was planning on making our cabin’s head a permanent home. The bunks are incredibly comfortable with curtains for privacy and a mattress that envelops – something I genuinely appreciated when the ship really started rolling. We are zigzagging along predetermined paths from east to west, and then west to east. When traveling west, the going can get pretty rough because we’re moving against the swells.

I heard the waves slapping the side of the ship with a ferocity that made the vessel seem much smaller than she is. The seas were actually quite calm, but there were still moments when it felt as if we were perched on a cork, bobbing in a boiling caldron of water.

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Jenny Woodman in a “Gumby” suit after an abandon ship drill. Image Credit: Jenny Woodman/ACCESS/NOAA/Point Blue

My queasy, but cozy respite was interrupted by an abandon ship drill before lunch. This required mustering in predetermined locations with our life vests and immersion survival suits. Each of us donned our own unwieldy orange neoprene “Gumby suit,” which is designed to keep the wearer floating and dry in cold water while awaiting rescue. The NOAA officer in charge of my assigned life boat, Lieutenant Jesse Milton, was kind and didn’t laugh at my ineptitude. Nonetheless, after attempting to stand and zip the suit on the back deck of the ship, I suspect I wouldn’t fare too well if anything were to actually go wrong.

The expedition is part of a project, now in its 15th year, to better understand and monitor the marine ecosystems off the coast of Northern and Central California. The Applied California Current Ecosystem Studies (ACCESS) cruises happen three to five times each year.

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The transect lines on the map show the locations visited multiple times each year by scientists studying how oceanography and prey distribution impacts wildlife in the region. Image Credit: ACCESS/NOAA/Point Blue

Each cruise returns to specific locations and travels along what are called transect lines; there are a total of 21 lines in the area being studied, which stretches from Northern to Central California. Jaime Jahncke is the California Current Director for Point Blue Conservation Science, the organization collaborating with NOAA to conduct the ACCESS work. He explains that repeat visits to the same locations help scientists assess change over time, from season to season and year to year.

With the data collected on these cruises, the team is able to compare warm years like 2014-2015 to previous warm periods and see that there were fewer krill, the preferred food source for many of the wildlife feeding here, and more gelatinous zooplankton, which are less nutritious. When appropriate food sources are less abundant, observers see wildlife feeding closer to shore and subsequently, closer to shipping lanes, which increases the chances of ship strikes and entanglement.

We completed our first transect by mid-afternoon. While traveling along these lines, a group of scientists stay on the upper deck of the ship, which is called the flying bridge. Each person has a specific job.

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Wildlife observers on the flying bridge from right to left: Taylor Narin, Dru Devlin, and Kirsten Lindquist. Image Credit: Julie Chase/ACCESS/NOAA/Point Blue

Kirsten Lindquist is the birder on this cruise and the ecosystem monitoring manager for the Greater Farallones Association (GFA). (You can read more about GFA’s efforts to support NOAA and the Sanctuaries here.)

Lindquist says, “Common murre, six, at three-two-zero, flying, zone two, with fish.” Then, Taylor Nairn, the data manager for GFA, logs the observations in a laptop.

Then, the Research Coordinator for Greater Farallones National Marine Sanctuary and Chief Scientist for this cruise Jan Roletto calls out mammal sightings, “Blow . . . unknown whale, traveling.” She is working alongside Dru Devlin, a wildlife observer with a long history conducting surveys for ACCESS and GFA’s citizen science program, Beach Watch.

The highlight for me was seeing my first Tufted Puffin, which was beautiful.

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Mola mola in Greater Farallones National Marine Sanctuary. Image Credit: Julie Chase/ACCESS/NOAA/Point Blue

Spotted on July 3:

Common Murres
Western Gulls
Red-necked Phalaropes
Sooty Shearwaters
Pink-Footed Shearwaters
Black-Footed Albatross
Northern Fulmar
Rhinoceros Auklets
Cassin’s Auklets
South Polar Skua
Tufted puffin
California Sea Lions
Fin Whales
Blue Whales
Humpback Whales
Unidentified Whales
Mola molas


Jenny Woodman, Proteus founder and executive director, is a science writer and educator living in the Pacific Northwest. She writes about ocean health, technology, and climate change; she is a 2018 lead science communication fellow for the Exploration Vessel (E/V) Nautilus. Her work can be found in Atlantic Monthly, IEEE Earthzine, and Ensia Magazine.


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Applied California Current Ecosystem Studies (ACCESS)  by Greater Farallones National Marine Sanctuary

 

 

Categories
Exploring Ocean Worlds Sea Sentries

Science at Sea

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NOAA Ship Bell M. Shimada is a state-of-the-art fisheries survey vessel that studies a wide range of marine life, sea birds and ocean conditions along the U.S. West Coast. Image Credit: NOAA

I’m preparing to mobilize with a team of scientists on board the NOAA Ship Bell M. Shimada on July 2. We’ll spend the next nine days cruising from San Francisco through three National Marine Sanctuaries — Cordell Bank, Greater Farallones, and Monterey Bay — collecting water samples and looking for seabirds and marine mammals.

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National Marine Sanctuaries along the California Coast. Image Credit: Cordell Bank National Marine Sanctuary

The expedition is part of a 15-year project called Applied California Current Ecosystem Studies (ACCESS), which aims to study linkages between weather, oceanographic conditions, and climate change within the sanctuary system. One of the main things they will observe and monitor is prey distribution in order to help identify areas where seabirds and whales might be heading for their next meal.

By locating places where foraging might overlap with human activity, sanctuary managers can help reduce the risk of harm to wildlife — ship strikes and entanglement in fishing gear is a major problem scientists are working to address.

Each year, three to five ACCESS cruises are conducted; over time, the data collected on these expeditions may reveal trends, which might help shed light on how climate change impacts the ocean, and subsequently all of us. Extreme warm water events are a particularly important area for study, because the temperature fluctuations disrupt the food web and can lead to major die-offs.

ACCESS is a partnership between NOAA National Marine Sanctuaries and Point Blue, a nonprofit conservation science organization founded in 1965. Collaborations with at least 10 public and private organizations also aids in processing and analyzing samples and data collected during expeditions.

For a series we’ve titled Sea Sentries, I’ll be posting regular updates with photos, interviews, and stories to help deliver our readers out into our National Marine Sanctuaries, so check back regularly and join me at sea!


Jenny Woodman, Proteus founder and executive director, is a science writer and educator living in the Pacific Northwest. She has spent the last four years writing about ocean health, technology and she is a 2018 lead science communication fellow for the Exploration Vessel (E/V) Nautilus. Her work can be found in Atlantic Monthly, IEEE Earthzine, and Ensia Magazine.


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Categories
Arctic Change

Take the A-Train to the Arctic

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This Aqua satellite was launched in 2004; it collects about 89 Gigabytes of data per day about elements of the Earth’s water cycle — including water in liquid, solid, and vapor form. Image Credit: NASA’s Earth Observing System

In the Arctic, much depends on ice. Pack ice. Drift ice. Old ice. New ice. For some wildlife, ice provides safe haven from predators and for others, it offers access to prey. For humans, many of whom are living in isolated coastal communities with no roads in or out, ice is everything.

Sailors and explorers have kept sporadic records about ice conditions dating back thousands of years, but only since 1979, with the launch of Earth observing satellites, have streams of near-constant information about Arctic sea ice been available. Using images and observations captured daily, scientists are able to measure ice thickness, area of coverage, and seasonal fluctuations in the advance and retreat of ice coverage.

Real-time sea ice images and data are vital for the safety of researchers like George Divoky and for people in Arctic communities who depend on ice for subsistence hunting and fishing. Anthony Fischbach is a wildlife biologist for the United States Geological Survey (USGS) in the Alaska Science Center Walrus Research Program, where he has worked since 1994. Fishbach delivers a daily “Ice Mail” to just over 100 people interested in up-to-date information on Arctic sea ice. Subscribers include Divoky, scientists in Russia, and remote Inuit communities who may not have easy access to internet connections capable of retrieving large amounts of data.

“The main niche I’m trying to fill is a way to get meaningful sea ice imagery and charts in the palm of your hand or on the deck of a ship where you’ve got really minimal bandwidth,” said Fischbach. “If you’re in a remote community that has 2G cell phone connection or if you’re on an Iridium-linked vessel, the existing ways of accessing the data just don’t meet the need.”

He described his own experiences of working in Arctic coastal communities or being on board a retrofitted crabber, “We just struggled to get the data through the existing methods and we couldn’t get all the data we wanted.”

Today, Fischbach relies heavily on two satellites we’ll be following closely this summer — Aqua and Terra. Both are part of NASA’s Afternoon Constellation or A-Train, which is a convoy of satellites operated by NASA and international partners. The satellites travel together, completing a polar orbit twice a day; because of the Earth’s rotation, a polar orbit means that the satellites will observe the entirety of the planet’s surface every one to two days.

The A-Train crosses the equator at about 1:30 a.m and 1:30 p.m.; the Terra satellite passes the equator in the early morning, Aqua in the afternoon. This timing and repetition allows scientists to generate cloud-free images and to study how temperatures over land and water change from day to day.

By flying satellites loaded with a host of Earth-observing instruments in a formation, scientists are able to gather a great deal of meaningful data. According to NASA, flying in concert “allows for synergy between the missions—synergy means that more information about the condition of the Earth is obtained from the combined observations than would be possible from the sum of the observations taken independently.”

While each satellite is tasked with different mission objectives, the data from individual instruments can be combined to paint a more vivid and informative picture of the Earth’s climate and atmospheric systems.

This visualization shows the orbits of NASA-related near-Earth science missions that are considered operational as of March 2017. Video Credit: Greg Shirah for NASA Visualization Studio

A key instrument on board Aqua and Terra is a moderate resolution imaging spectroradiometer, or MODIS for short, which is capable of of observing across 36 spectral bands or wavelengths at different resolutions (250, 500, and 1000 meters). (A complete technical profile of this instrument and the data it provides can be found here.)

MODIS is an integral instrument for studying the ocean, because it aids in the creation of ocean color maps. Ocean color reveals much about phytoplankton productivity, which, according to NASA, forms the basis of the ocean’s food chain and plays a big part in carbon storage and movement. MODIS also allows for detailed maps of sea surface temperatures, which are known to influence weather patterns. Since MODIS is able to study water in liquid, solid or gas form, the instrument aids measurement of snow and sea ice and how much solar energy is being absorbed or reflected back to space.

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This ice map for May 24, 2018, generated by United States Geological Survey (USGS) in Alaska, combines MODIS images from Aqua and Terra with National Ice Center data. Image Credit: Anthony Fischbach for USGS

Fischbach explains that the images in his daily emails (seen above) are processed with false color so you can distinguish the white of the clouds with the white of the sea ice; sea ice is aqua-colored and the clouds appear white. The images show detail down to 250 meter resolution, meaning you can clearly see objects that are 250 meters or 820 feet wide.

To people living and working in the the Arctic, these sea ice data could be comparable to monitoring hazards on roadways in the lower 48, because the ice and water provide access for both transportation and food.

The ice is moving constantly, which creates precarious decision-making choices in remote regions without the right information. With several days of ice data in hand, people in the field  like Fishbach and Divoky can make better choices.

“I’d really like to know as much as I can about how the ice is moving. Is there more ice coming this way? Is it going to be congesting? Is it going to be opening up?” he asks. “You know, do I launch boat out in to the ice —  the shifting seascape — where I could get pinned in and trapped and not make it home?”


This story is part of an ongoing series titled Arctic Change centered around George Divoky’s 44th field season studying Black Guillemots, sea ice, and climate change on a remote Arctic island off the coast of Alaska. To donate and support Divoky’s work on Cooper Island, visit the Friends of Cooper Island.


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