The outdoors – Page 18 – a sibilant intake of breath

More good service from MEC

Once again, I have been reminded of why it makes sense to buy gear from MEC. On Friday, I was cycling along the Ottawa River pathway when I spotted a small beaver lodge in a little wooded area. I stopped, got out my camera (with 70-200mm lens) and approached the lodge, holding my handlebars with one hand.

I stuck around for a few minutes, trying to spot a beaver and snapping photos of birds while I waited. Eventually, I gave up and returned to the path. When I got there, I saw that the cable for my bike computer (which runs down to the sensor) got sheared off by an errant branch.

I went to MEC and, without a question or the need for a receipt, they gave my a replacement sensor, cable, and dock (they are one unit). They even offered to refill my water bottle for me.

Collecting bike statistics

Given that I am the kind of person who can be motivated by numbers, I decided to pick up a bike computer today – the simplest waterproof model available at MEC. After installing it, I wanted to make sure I had selected the correct wheel size (I think it’s 2174mm on the 700x32c wheels of my Trek 7.3FX). A few kilometres of cycling allowed me to confirm both its measure of velocity and distance traveled against my GPS receiver (a marine unit too big and cumbersome for cycling).

Unfortunately, it also confirmed that the little rare earth magnet that the sensor detects shifts around quite easily on my spoke, and it needs to be very carefully aligned to work. First, I tried gaffer tape, but it really wasn’t right for the job. Then, I tried the blogosphere, which suggested superglue. Glued in place, I hope that magnet isn’t going anywhere while I rack up the kilometres over the coming months.

For those keeping track, the trip out to get the computer, return home with it, and calibrate it amounted to 17.8km.

Spring cycling

Today was an example of the best cycling weather Ottawa provides: bright and a bit cool. With a light jacket, slow periods in the shade were comfortable. With more ventilation, hard runs out in the sunshine were.

Crisscrossing the city, I managed to pick up one of my favourite mushrooms (Pleurotus eryngii) for dinner. They aren’t terribly flavourful, but I like the texture and they fry up most enjoyably with butter and garlic. I also got fancy bread in the Glebe and black bean dip for it in the Byward Market. I got a good bit of reading done, and I got some of my first real cardiovascular exercise since fall. Cycling along the canal provides a nice illustration of the power of sunlight. The areas that get sun for a fair period each day are entirely clear, while areas of northern exposure still have nearly a metre of snow and ice piled upon them.

Spring is certainly a dramatic transition in Ottawa. Judging by the number of square centimetres of exposed skin getting exposed to sunlight today, as much vitamin D was probably produced in the last 12 hours as in the preceding 12 weeks.

Access rights to Canadian waterways

According to Saxe Environmental Law News, the federal government has proposed to amend the Navigable Waters Protection Act in a way that would limit future public access to navigable waterways:

Ever since Canada was first settled, anyone in a canoe has had a right to paddle rivers, lakes and streams with enough water to float in… Now the federal government is proposing to give away much of this power.

The right to free navigation in public space seems to be an important part of living in a just and open society. Having limits on the extent and character of private property is an important mechanism for maintaining an overall civic structure, in which everyone has equal rights under the law. As someone who has enjoyed a fair bit of canoeing (and some kayaking) in the past, I find this potential change of rules worrisome. Hopefully, this decision will get appropriate scrutiny from lawmakers and the public.

The post also includes a link to a memorandum on the issue (PDF), written by Ecojustice.

Plants and infrared light

If you have ever seen plants photographed using infrared film, you will know that they have a weird glowing quality when viewed at those wavelengths.

Apparently, the reason behind this has to do with quantum mechanics and photosynthesis. Photons with shorter wavelengths (violet and beyond) have higher energy than those with longer wavelengths (red and beyond, in the other direction). Since only photons with a certain level of energy can be used by photosystems I and II in chloroplasts, plants reflect insufficiently energetic photons, rather than absorbing them. This keeps them from taking in uselessly low energy photons which would simply turn into heat, rather than powering their photosynthetic machinery.

Climate change and Australia’s brushfires

Scientists frequently condemn journalists for being too quick to assert that particular events either support or call into question anthropogenic climate change. Indeed, reporting responsibly on the issue can be challenging. One the one hand, one cannot ignore the long-term contribution climate change makes to the frequency and severity of events; on the other, one doesn’t want to propagate the false idea that the accuracy or inaccuracy of climatic science hinges on a small number of extreme events of local weather trends.

A recent RealClimate post considers the case of Australia’s terrible recent brushfires. It considers a century worth of evidence on Australian brushfires, examining the importance of maximum temperatures, relative humidity, wind speed, and drought factors. Climate change trends are pushing in the direction of higher average temperatures and reduced rainfall. In the end, it comes to a measured by sobering conclusion:

While it is difficult to separate the influences of climate variability, climate change, and changes in fire management strategies on the observed increases in fire activity, it is clear that climate change is increasing the likelihood of environmental conditions associated with extreme fire danger in south-east Australia and a number of other parts of the world.

That may not be the kind of conclusion that translates easily into a headline for a popular newspaper, but it is the sort that we need to consider when making public policy on both climate change mitigation and adaptation.

The fourth report of the Intergovernmental Panel on Climate Change (IPCC) concluded back in 2007 that:

An increase in fire danger in Australia is likely to be associated with a reduced interval between fires, increased fire intensity, a decrease in fire extinguishments and faster fire spread. In south-east Australia, the frequency of very high and extreme fire danger days is likely to rise 4-25% by 2020 and 15-70% by 2050.

Those fires will naturally contribute to positive feedbacks within the climate system, as heat-induced dryness prompts the fire-induced emission of greenhouse gasses previously bound up in forests and grasslands.

Troubled bike rental scheme in Paris

In a previous post, I mentioned the bicycle rental schemes that have already been deployed in some cities and which are being contemplated elsewhere. The theory is certainly an appealing one: making a fleet of bikes available for visitors and residents to rent at reasonable prices, encouraging sustainable transport, exercise, and an appealing urban character.

Unfortunately, the scheme in Paris has run into significant difficulties with theft and damage. Over half of the original fleet of bicycles has been stolen, and 1,500 a day require repairs due to abuse or vandalism. The company running the scheme has told the city that, since the theft and damage costs are so much higher than expected, the original financing agreement based around free advertising space is not adequate.

The outstanding question is how such abuses can be curbed without undermining the value of the whole scheme. For instance, credit card holders could be required to make a deposit equivalent to a bit more than the value of the bikes (about 400 Euros each), which would be refunded when the bicycles are returned. That would, however, exclude anybody who didn’t have access to that kind of credit. It also wouldn’t necessarily deal with the problem of vandalism. Strong public pressure to treat the bikes well might help protect them, but it is a difficult thing to encourage – especially since the kind of people likely to enjoy abusing bicycles are also the kind of people more mild-mannered citizens are unlikely to publicly challenge.

Ice and solar power

Indirectly, Ottawa winters provide a good demonstration of just how immense a quantity of solar energy there really is on this planet. Consider the fact that the Earth’s axial tilt produces thirty degree weather here in the summer and negative thirty degree weather here in the winter. Walk out onto the frozen surface of Dow’s Lake and think about how the only reason the lake is ever liquid is because of the massive amount of solar energy striking it in the spring and summer. Then, recall that all the lakes and seas everywhere on Earth would freeze solid without the constant solar influx. This is well illustrated by the frozen moons in the outer portion of our solar system.

Burning all the world’s fossil fuels wouldn’t let us keep oceans liquid, in the absence of solar assistance. Moving to an energy system that relies directly (solar photovoltaic and concentrating solar) or indirectly (wind, hydroelectricity, biomass) on the sun is an overwhelmingly important part of creating a sustainable society. The amount of energy available to harness vastly exceeds the amount we can drill or dig up out of the ground.

Winter moods

Today’s sharp, dry cold makes for a nice contrast to yesterday’s Slowly Melting City. As much as you might think a brief return to fall weather, in the midst of winter, might be pleasant, it seems to be the case that once this city is well frozen, it does best to remain that way.

The special hazards of the melting city are the combination of speeding cars with deep, slush-filled pools, as well as wind-blown tiny droplets of water that threaten any lenses or electronic equipment not well stowed in bags. Taking photos in wind-blasted rain or wet snow is nearly impossible, provided you don’t have an assistant to carry around a beach umbrella for you. Walking to work yesterday, there were three points where I had to choose between wading through a sidewalk submerged in ten centimetres of muddy slush water, or jumping the barrier onto the roadway and making a mad dash around the pool while the flow of cars was interrupted by a red light. Each time, I decided to take the rapid roadway approach – a series of decisions which left me with dry feet and a bit more aerobic exercise.

One effect of the bus strike has been to make me much more aware of the weather. Essentially, that is on account of having to spend longer spans outside, and having no transport alternatives to walking when the weather suddenly changes. As such, I have been lugging around enough wool at most points in time that, should the need arise to re-clothe a sheared sheep, I would probably be able to do so.

The cold in Ottawa

In my experience, Ottawa has a pretty standard multi-level system to how cold it is in any particular environment. This is reflected on two scales: a static scale based on how cold you would feel in ordinary indoor clothes and a dynamic scale based on what you were wearing in order to deal with the conditions shortly before.

This is the dynamic scale:

The hottest part of the scale is where you are seriously bundled up and unexpectedly delayed in a warm environment. For instance, you hop onto a bus to go a couple of stops and it gets stuck in traffic. You are about to go out, so you don’t want to disrobe, but remaining in the heat is very uncomfortable.
The level varies depending on the amount of wind. Sometimes, it is the ordinary transition from being outdoors to being in a warm building or vehicle. Sometimes, it is the transition from being somewhere windy to being somewhere outside but protected. In some cases, the latter transition is actually far harsher. There have been times when after waiting for a bus in an exposed area, I moved to a covered area and felt almost as warm as in the topmost scenario above.
Below those is the neutral level, in which you are basically adequately dressed for your surroundings and can operate comfortably for a good period of time at your current level of activity.
The next level is cold due to something lacking: either the result of being slightly less active than you were recently, or because you are missing one or two items that would make you comfortable. For me, those things are most often a hat, adequate gloves, or warm socks overlapping with long johns.
The next level is being significantly cold temporarily, either while your body heat spreads through clothing you just put on or while you ramp up to whatever stable level of physical activity you will be maintaining.
With the next level, minor persistent suffering arrives. Usually, this is the result of poor planning. Most often, this is a case of not expecting to leave a place as late as you did and ending up walking by night instead of by evening. Wind of unexpected ferocity can also cause this.
Beyond that, the levels aren’t really distinct. At the extreme edge – which I have experienced once or twice – you are actually cursing your way through savage winds from doorway to doorway. In this situation, you will actually feel that injury (and ultimately death) will result before long if you remain out in the cold and wind.

In my experience, the best way of coping with all this is to be prepared, try to anticipate the conditions in which you will find yourself, and dress in ways that are conducive to moving both up and down the scale. Having long johns, a wicking layer, two fleece layers, and a wind/waterproof outer is a lot better than having a wicking layer, one absurdly warm layer, and a shell. The former lets you move through the scale in one-step increments, while the latter commits you to two or more.

One odd consequence of the relationship between warmth and activity can be just how much those of us with stingy thermostats need to wear in order to sleep comfortably. On nights where walking around in moderate garb is perfectly tolerable, actually sleeping in my flat may require two wool hats, long johns, trousers, a fleece, two pairs of warm socks, a fleece sleeping bag liner, and a down duvet. The question then becomes whether you will be woken by cold as the night progresses (likely if you went to sleep early), or by unbearable heat when the sun finally starts to thaw the city at dawn.