Author Archives: Andreas Muenchow

Nares Strait 2012: From Thule towards Smith Sound

The CCGS Henry Larsen lifted anchor about 6 hours ago sailing north towards Nares Strait and Petermann Glacier. Air temperatures in port were a balmy 10.5 C this morning, but now have dropped to 6.3 C this evening at sea. We are steaming at almost 9 kts with clear skies overhead most of the day. We hit a fog bank or two and I mistook the blowing fog horn for a fire alarm.

The day was largely spent with setting up gear, re-arranging lab spaces indoors and deck spaces outdoors. The usual drills and introductions to emergency procedures (fire, abandon ship, helicopter) to a few hours, too. Access to the internet is severly limited: it takes about 1 second to send and receive 64 bytes from the ship to either Delaware, England, or California. About 20-40 of these “pings” fail, meaning that actual data transmission and receive rates are even slower.

There are faster connections aboard, but those are limited to the ice observer who receives severely downgraded RadarSat imagery for ice navigation that will guide ship and helicopter for visual observations on where to go and what ice to avoid. Petermann Ice Island apparently moved another 4 km and has its tip now sticking almost into Nares Strait perhaps touching coast near Offley Island at the north-eastern side of Petermann Fjord. That image is 24 hours old, we may receive a new one over night.

Local time (same as Montreal or New York) in 9pm and the sun is still about 30 degrees above the horizon, no darkness all night. Greenland and its ice cap are visible in the distance, about 30 miles to my right. A few icebergs are scattered loosely here and there. We are 48 people aboard … more laters.

Nares Strait 2012: Grounded in St. John’s, Cod, and Crossing of Lines

Hurry-up and wait: The rushed 5 am arrival at St. John’s airport this morning turned into a six-hour wait and a canceled departure for Thule, Greenland. Crew, officers, and scientists are all grounded and spend an extra night waiting. There is lots of talk about screeching-in and uncertainty if membership in the “Order of the Blue Noses” or the “Order of the Gold Dragons” substitutes the more mundane “screeching-in.” Let me explain:

Canadian authorities aboard CCGS Henry Larsen.

The CCGS Henry Larsen originates from St. John’s and most of its officers and crew are local to the town, island, and icy waters offshore where cod once ruled supreme until mis-managed industrial-scale offshore trawling almost wiped the cod out and destroyed much of the local economy that was based on cod for centuries.

Time series of (a) catch of cod (in 106 tonnes) over the Newfoundland and Labrador shelf (b) the total abundance of Gadidae over the southern Newfoundland shelf (c) the catch of shrimp and (d) crab over the Newfoundland and Labrador shelf (e) the greenness index from the Continuous Plankton Recorder (CPR) over the southern Newfoundland Shelf (f) bottom temperature from inshore on the southern Newfoundland shelf and (g) the North Atlantic Oscillation (NAO) index. The heavy solid lines in panels (f) and (g) represent low-pass filtered smoothed curves of the plotted data. [From DeYoung et al, 2004: Detecting regime shifts in the ocean, Prog. Oceanogr., 60, 143-164.]

The CCGS Henry Larsen has two crew who rotate on and off the ship every 4-8 weeks. Over the years I have met many crew who hailed from families who had worked the cod on smaller, inshore boats. They are superb and experienced sailors who know how to handle and run ships and all attached to it in harsh and icy waters. But how does this relate to screech and cod? Let me digress a moment by comparing US and Canadian Coast Guards:

The U.S. Coast Guard’s ice breaker operates 24-hours/day under military rules without alcohol or overtime to be had. In contrast, the civilian Canadian Coast Guard operates less hours at full strength with some alcohol and some overtime served in moderation. The cultures aboard US and Canadian vessels differ: US ships are permanently in training with young crew on 6-month deployments moving to a new assignment each year, while Canadian ships are working with an older, more experienced, and steady crews. The Canadian crews do the same amount of work in 12-18 instead 24 hours with 1/3 the staff. Ironically, US ships have more “unclassified” electronic capabilities with many more advanced sensor systems. Both ships also have “classified” sensors and missions that I know nothing about, but I digress. Cod and screech are potentially aboard Canadian ships operating out of Newfoundland only.

CCGS Henry Larsen crew at work: Deployment of a tide gauge (subsurface pressure sensor) in Alexandra Fjord. This is one of the instruments we will recover from Nares Strait that was deployed in 2009.

Our small motley crew of eight scientists this year consists of 4 Canadians from British Columbia, 3 Americans from Delaware, and 1 Dutch from England. Yesterday night we all converged at a fine restaurant on Ducksworth Street in downtown St. John’s, Newfoundland. A dispute is still raging among us on what is valid proof of earlier”screeching-in?” I learnt the hard way, that “laminated certificates” are invalid, but what about “un-laminated certificates?” The former are easily obtained in the vibrant port city of St. John’s with its many bars and pubs. The “un-laminated certificates” may be valid, if signed and authenticated by an officer of the CCGS Henry Larsen aboard said ship, but enforcement has been selective.

There are also arguments, that a crossing of the Arctic Circle (certified by a Commanding Officer of a Canadian Coast Guard ship) or the crossing of the International Dateline north of the Arctic Circle (certified by a Commanding Officer the CCGS Henry Larsen) may supersede the more common “screeching-in” ceremonies and certificates. I am the main person making these arguments facing authorities with powers that exceed mine by far.

Our failure to leave for Thule, Greenland today may give some of us a chance to get potentially needed “screeching-in” certificates, but I very much doubt that these “laminated certificates” carry much weight. Time will tell. It will also tell if we get to Thule tomorrow. Hurry-up and wait.

Nares Strait 2012: First Challenges and Petermann Ice Island Coming

Petermann Glacier’s 2012 ice island is heading south, the Canadian Coast Guard Ship Henry Larsen is heading north, and my passport went through the washer. Ticket agents at Philadelphia airport refused to accept my worn passport to get into Canada. My journey appeared at a dead-end, but ticket agents, U.S. State Department employees in downtown Philadelphia, and a Jordanian cab driver got me to Canada with a new passport, a new ticket, and a new lesson learnt in 4 hours. I did not believe it possible, but it was. I arrived in Canada with an entire day to spare.

Over the years I learnt to plan and budget generously for Arctic research, and then improvise with what is available. I was taught to bring spares of all critical equipment to prepare for loss and failure. I learnt to allow for extra time as missed planes, weather, and who knows what always make tight schedules tighter, like passports going through washers. I learnt that patience, civility, co-operations, and seeing the world through other people’s eyes and responsibilities get me farther than fighting. After I got my PhD in 1992, I learnt that the very people who cause troubles by enforcing rules and regulations are often also the most likely to know the way out of trouble. The ticket agent who denied my passport was also critical to help me get a new one. Thank you, Beth.

Our science party of eight from Delaware and British Columbia and the ship’s crew of 30-40 from Newfoundland will meet on the tarmac of St. John’s tomorrow at 4:30am, fly to and refuel at Iqaluit, Nunavut, and arrive at the U.S. Air Force Base at Thule, Greenland. The crew who got the ship from St. John’s to Thule will return with the plane home. It usually takes two days sailing north by north-west to reach Nares Strait from Thule, but this year the ice will be a challenge far greater than getting a new passport in 4 hours.

Western North-Atlantic and Arctic regions with Greenland in the west (top right) and Canada (left). Blue colors show bottom depth (light blue are shelf areas less than 200-m deep) and grey and white colors show elevations. Nares Strait is the 30-40 km wide channel to the north of Smith Sound, Baffin Bay is the body of water to the south of Thule.


The ice island PII-2012 is moving rapidly towards the outer fjord at a rate that increased from 1 km/day last week to 2 km/day over the weekend. I expect it to be out of the fjord an in Nares Strait by the weekend when we were hoping to recover the moorings with data on ocean currents, ice thickness, and ocean temperature and salinities that we deployed in 2009. The ice island is threatening us from the north: Without a break-up, it is big enough to block the channel as another large ice island did for almost 6 months in 1962.

Petermann Glacier, Fjord, and Ice Island on July 31, 2012 at 08:05 UTC. Nares Strait is to the top left. Petermann Glacier, Greenland is on bottom right. PII-2012 is at the center.


At the southern entrance to Nares Strait, lots of multi-year ice is piling up near the constriction of Smith Sound. Winds and currents from the north usually flush this ice into Baffin Bay to the south, however, the same winds and currents will move the ice island out of Petermann Fjord and into Nares Strait. We will need patience, humility, and luck to get where we need to be to recover our instruments and data. A challenge that cannot be forced, we will likely wait and go with the flow rather than fight nature. We will have to play it smart. We are the only search and rescue ship for others. I am nervous, because this year looks far more difficult than did 2003, 2006, 2007, or 2009. In 2005 we were defeated by the winds, but that is a story for a different day.

Record Warming and Melting of Greenland

These are admittedly daily data, and yes, it is warm in summer everywhere, and yes, when it is warm, snow and ice melt at the surface. Here is the latest image of Greenland’s warming and melting that I lifted (figure and caption) straight from today’s NASA release:

Extent of surface melt over Greenland’s ice sheet on July 8, 2012 (left) and July 12, 2012 (right). Measurements from three satellites showed that on July 8, about 40 percent of the ice sheet had undergone thawing at or near the surface. In just a few days, the melting had dramatically accelerated and an estimated 97 percent of the ice sheet surface had thawed by July 12. In the image, the areas classified as “probable melt” (light pink) correspond to those sites where at least one satellite detected surface melting. The areas classified as “melt” (dark pink) correspond to sites where two or three satellites detected surface melting. Image credit: Jesse Allen, NASA Earth Observatory and Nicolo E. DiGirolamo, SSAI and Cryospheric Sciences Laboratory


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Oceanography of Petermann Fjord and Glacier Melting

Trudy Wohlleben just send a group of scientists in Denmark, England, Canada, and the US the latest RADARSAT image of the ice island that formed in Petermann Glacier earlier this week.

RadarSat Image of Petermann Ice Island (PII-2012) and Glacier kindly provided by Trudy Wohlleben, Canadian Ice Service. The location of the hinge line is approximate only.

The current position of the remaining ice shelf of Petermann Glacier is the farthest landward since recorded observations. Dr. Croppinger was the first to provide a map of the glacier Continue reading