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See the paradox of last chance tourism

midlife fashion woman in summer vacation outfit
cruise ship in Glacier Bay
Cruise ship in Glacier Bay. Ship are at beth for about 9 hours for glacier and wildlife viewing. The high relative humidity leads to swelling of particles emitted by the ship and become visible as haze underneath the inversion layer. Photo from Piralla, Gende, Mölders 2014

The crux with the last chance

The so-called Last Chance Tourism is growing. In case you never heard that term, it refers to vacation cruises to destinations that may supposedly be gone in the future. Favorite destinations of such cruises are Antarctica, Glacier Bay or Tracy Arm in Alaska. Most recently, the sailing of the Crystal Infinity made news with her sailing the Northwest Passage from Anchorage to New York. This year, they redo the tour at the price of a little car. Of course, these type of cruises are for the very rich only or a way to spend the savings of a lifetime in one shot. In other words, not for normal people like you and me. But read on. It’s about Alaska, its environment and another post about energy and power generation in Alaska.

ships in the Alaska Arctic
Screenshot of ships in Alaska’s waters in October 2015. Live Ships Map – AIS – Vessel Traffic and Positions – AIS Marine

Tourism is a big part of Alaska’s economics

Cruise ship tourism is a major economy for Alaska. This industry is well aware that they need the pristine landscape to sell their cruises. They are also aware that a cruise ship is basically the equivalent of a town of 2000 to 5000 people, but on the water. Of course, this town needs power even when the ship is a berth for glacier viewing, wildlife viewing or just for letting the passengers explore the town at the port of call.

fashion over 40 woman in dress over skirt on boat mooring
Shein dress, Gucci belt, Michael Kors plateau sandals, Longchamp cuire pliage, Ray Ban purple mirrored sunglasses, and Aris Allen dance skirt (all own)

Humidity makes tiny particles visible as haze

In fjords, inversions form frequently. This means that temperature increases with height instead of the normal decrease with height. Under inversion conditions, no or close to no vertical mixing occurs. Consequently, any emissions into and inversion layer remain there. In the moist climate of the Alaska Southeast or Aleutian Chain, ugly haze forms on water soluble particles.

cruise ship travel
Cruise ship sailing the mid bay of Glacier Bay National Park. Here again relative humidity is high for which emitted particle become visible as haze. However, the atmospheric conditions are less stagnant and permit vertical mixing and exchange with air aloft. Thus, the plume thins out with time. The air seems dizzy. At the top, are some clouds due to high relative humidity. Photo from Piralla, Gende, Mölders 2014

Natural sources for airborne particles

Of course, particles also occur naturally. Particles form, for instance, by evaporation of water form sea-spray or are emitted by volcanoes. Dust uptake by wind is natural another source for airborne particles. Particles can also form from precursor gases like sulfur dioxide, nitrogen dioxide, ammonia and alike by gas-to-particle conversion. A process similar to phase transition from water vapor to ice or droplets. Even in the pristine atmosphere traces of these gases exist from volcanic emissions, biogenic processes in the soil, and animals. Other natural particle sources are wildfires.

Particles from ship emissions

Particles, some of which are black carbon, are emitted by any combustion process. However, when a cruise ship sails somewhere in the middle of nowhere in the fjords and/or between the Islands of the Alexander Archipelago, for instance, this ship may be the only anthropogenic emissions source in a radius of 50 miles or so. It is even more extreme in the Northwest Passage. Under inversion conditions on days with high relative humidity, the exhaust plume may not only become visible to the passengers of the cruise ship, but may stay there for hours even when the ship is already miles away. Consequently, when the next cruise ship sails the area, the tourists on board of that ship see unexpected pollution.

fashion over 50 woman in dress over skirt
Back view of outfit with Shein dress, Gucci belt, Michael Kors patent leather sandals, Aris Allen skirt, and Longchamp bag (all own)

The tourism paradigm

Since the cruise ship tourism industry knows that any pollution even their own is adverse to their business, they use scrubbers, low sulfur fuel and other high technical means to keep emissions low. These efforts of cause also help to protect the ecosystems along their cruise lanes. This means it also helps the wildlife which also make part of their business.

Power generation

Let’s come back to the point that a cruise ship has to produce the power on board even at berth. When an engine is not at optimal load its emissions are higher than otherwise. Consequently, when the auxiliary engines produce power at berth, the ship is maneuvering or the ship is cruising at its maximum speed, its emissions are among the highest. This means that when producing power at berth in a city, the ship emissions are high. In the moist climate like the fjords of Southeast Alaska, the likelihood that the emissions become visible haze are high too.

style over 40 woman in floral dress over skirt
Shein floral dress, Gucci bamboo suede belt, Michael Kors cork plateau sandals, Aris Allen skirt, Ray Ban sunglasses, and Longchamp pliage (all own)

Cold ironing to reduce emissions

Tourists like to take photos of them in front of their cruise ship – even if it is just a river cruise – and post them on social media. The haze would not be a promotional bell ringer for the tourism industry. The solution to the problem of haze production at berth is cold ironing. Here I am not talking about the iron used to get wrinkles out of clothes even though that would be expected on a fashion and style blog. 😉

FocusAlaska Riverboat Discovery landing post
Collage showing from bottom right against the clock’s rotation the souvenir store and Susan Butcher gallery, the landing place with the Discovery II in the center, and the view out of the window of Discovery II onto the stern wheel of the Discovery III and the pouring rain

Cold ironing means that the cruise ships plug into facilities to get electricity from shore. Of course, this power has to be produced somewhere and there will be emissions involved with it. However, power plants are much more efficient in their energy production, and have better possibilities to keep emissions at bay than the possibilities available on board of a ship. Furthermore, in Southeast Alaska, a huge amount of electricity stems from hydro-power generation. Watch out for a post about Alaska’s hydro-power later this year.

Special equipment is needed

Cold ironing requires special equipment of the ships. Think of it like when the special equipment one needs when one wants to power the house with a generator in case of an outage. Like not every house has the possibility to switch between power from a generator and that from the electricity company, not all cruise ships are equipped for cold ironing. Actually, in Juneau, the cold ironing facility was built by and belongs to a cruise company, Princess. More than 90% of their cruise ships cold iron when at berth in Juneau. Note that in many ports on the US West Coast, cold ironing facilities are part of the port to keep the ship emissions and hence pollution due to the port low in those port cities.

What can be done

Cold ironing is a start to reduce air pollution in Alaska’s port cities. It’s a step in the right direction.

Recently, a North America wide Emission Control Area (ECA) was established. An ECA is a 200 miles wide protected zone off the coast lines. Herein ships have to confer with stringent international emission standards set be the International Marine Organization. These emission standards involve to use special low sulfur fuel and a reduction of the nitrogen monoxide and nitrogen dioxide emission by 80% of the prior to 2010 standards.

Unfortunately, this ECA only encompasses the southern Alaska coast of the Gulf of Alaska. The Bering Sea coast and the Alaska and Canadian coasts of the Arctic Ocean are not included. However, according to the Arctic Council ship traffic thru the Bering Strait has increase notably in recent years due to the decline of sea-ice.

What do you think about last chance tourism and ship cruises? Is it just in fashion or environmental concern or just a vacation trip like a surfer flying to Hawaii for great waves or a fashionista/fashionister going to Paris Fashion Week once a year?

You can find what to pack for a dance cruise at this link.

Focus Alaska is a weekly series on Alaska lifestyle, events, curiousa, insider travel tips, Alaska shopping and street style.

Photos of me: G. Kramm

Copyright 2013-2017 Nicole Mölders | All rights reserved

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