Tag: Climate

Understanding Contrails

Crisscrossing the sky, as I look up on a clear day, there are civil aircraft going about their business. People travelling across the Atlantic or coming back or on a day trip to Glasgow.

These shiny pinpoints of light in motion, set against a blue sky, are all the more visible because of the vapour trails they leave behind. Aircraft speed through the rarified atmosphere to leave a momentary trail as evidence of their presence.

Up with the aircraft in flight are natural clouds. Up at 30,000 feet there can be Cirrus clouds[1]. There might not be much air pressure at that altitude but there’s enough moisture to support cloud formation. The word “wispy” sums them up.

Aircraft create condensation trails that are known as contrails. How the English language likes to shorten. They are not mysterious or generate with evil intent in mind. It’s simple physics.

In my bathroom, with hot water gushing from the shower, moisture is the air. When that moist air meets a cold surface, like a window, condensation is sure to be seen. Airbourne it’s not so different. Hot emissions from powerful jet engines shooting out into a cold low-pressure environment and guess what?

Typically, contrails don’t last long. If there’s appreciable wind at high altitude, then they get dispersed quickly. Not only that but the icy temperatures up there soon return things to the status-quo. There are days, when the air is still, that the sky can become a crisscross of contrails where dispersion is more like a gentle merging.

The theory goes that the cumulative impact of lots of high-altitude flying is like the impact of additional cloud formation. It’s water vapour after all. It’s known, high altitude clouds can contribute to the greenhouse effect.

The point I’m getting to here is that lots of flying contributes to climate change. Primarily because of the burning of significant amounts of fossil fuel. As a secondary consideration there’s the issue of contrails across the globe.

This leads to the question – can their formation be avoided? Even, is there something useful to be gained in doing so. Trials and research are trying to establish the answer to these questions[2].

Initially, contrail avoidance sounds like it should be relatively easy to do. However, like so many good proposals it’s not so easy. Change needs to involve air traffic management, flight operations and international regulators.

First the atmospheric conditions need to be detected or predicted in a given location and then an avoidance needs to be planned and undertaken in coordination with everyone flying at high altitude at a given time. Lost of data to crunch.

It’s possible, in oceanic airspace, a dynamic aircraft system could perform this avoidance function. It would be an interesting design challenge for an avionics company to take up.

#Net Zero #SustainableAviation

[1] https://weather.metoffice.gov.uk/learn-about/weather/types-of-weather/clouds/high-clouds/cirrus

[2] https://news.aa.com/esg/climate-change/contrail-avoidance/

Ignoring Climate Change?

In a way, I’m not immune from a little hypocrisy. Petrol prices go up and I’m not going to jump for joy. Prices go down. I’m not suddenly thinking that’s just going to encourage more consumption. No, I’m looking at the pound in my pocket. It will cost me less to fill up the tank.

There was a whole swath of apocalyptic tales of the world in the 1970s. The “oil crisis” of 1973 should have been a warning. Humanity might have taken the opportunity to look at the trends related to oil and gas consumption. There might have been a more sustained reaction.

Instead, alternative lifestyles, renewable energy projects and energy conservation were thought of as quaint novelties or scientific curiosities that would never really catch on. The political addiction to short-termism overrode consideration of substantial change. Increased exploration led to new sources of oil and gas being found.

Today, we should know better. The fight against climate change has a decade of talk behind it. Humanity knows that the link exists between burning hydrocarbon and a changing global climate. We are ignorant no more. Now, I almost wish I hadn’t written that last sentence.

Across the pond there’s a powerful nation. One that influences the behaviour of 100s of other nations. The US is the largest producer of oil and gas in the world. However, until the last few weeks it had recognised that maybe that isn’t a good formula for the future.

Back to that dollar in the pocket. Despite the US being a powerful nation many its people didn’t feel that way. All politics is local. When filling up with gas gets more expensive people do not jump for joy. In fact, there’s that human tendance to romanticise the past and remember when everything was cheaper. Life was easier. Can’t we go back?

It’s being reported that US President elect Trump’s choice for energy secretary is going to be like turning the clocks back. Prospect is that the fight against climate change is going to get a back seat. At least for the next 4-years.

Does this spell global disaster? Well, it certainly is a great big lost opportunity. Just like here in the UK, Brexit ignited the tendance to romanticise the past. It looks as if the same phenomena have taken root in the US. Burning more and more hydrocarbons is like a sugar rush. A boom to begin then followed by exhaustion. I expect after this presidential term the results will be one of regret. Just like Brexit. A wonderment – why on earth did we do that?

Still, there’s an opportunity for other countries to race ahead with advanced and alternative technologies to reduce energy dependency. It’s hard to think and act long-term. I’m confident it can be done. If it’s done successfully the prize will be great.

Earthrise

24th December 1968 did change everything. What was achieved in that year hasn’t been matched. An unexpected event took place on an adventure to orbit our Moon. Now, 55-years have gone by. Enormous strides have changed lives. Technology has raced ahead. We reside on a beautiful and bountifully planet. Yet, we have continued to pump massive amounts of carbon into the Earth’s atmosphere. I wonder, does this tell us anything about human nature? If there is such a thing.

The photograph called “Earthrise” was taken while the Apollo 8 spacecraft was skimming over the surface of our Moon[1]. I don’t suppose there has ever been a more significant colour photograph in human history. As one of the astronaut’s said, he could hold his thumb up at a window and mask everything and everybody alive except for the three of them in the capsule.

The Earth appeared as a swirly blue marble set in the dark emptiness of space. The image is stark. Eyes are drawn to the lush colour and liveliness of the globe. Contrasted with the darkness and vastness of space. Clouds, oceans, and landmasses all scattered across this lonely planet. At the time of the Apolo mission there was about three and a half billion inhabitants. Today, there’s eight billion people spread across the surface of the Earth.

This image has become pivotal in our thinking. So much of our debates and discussions about the future are dominated by conflict and competition for resources. When there’s the opportunity to stand back and realise that our small homeland is shared, those tensions fade, at least a little.

Fragility and, almost irrelevance, when set against the vastness of space, is our daily reality. Illuminated by the Sun, a minor star, and in just the right place for life, so we fight and war as if humanity was at the centre of the universe. That animalistic behaviour could be the route of our downfall. Only, we are doing something else to top that persistent stupidity.

What sets Earth apart? That cultivated atmosphere. Such are the interactions going on in the first 100 kilometres above the surface of the planet that a sustained healthy atmosphere exists. It takes a quick look at the images coming back from the exploratory rovers on Mars to see how alive and miraculous Earth’s atmosphere has become.

The question is, are we the generations of humans who will permanently degrade it? Presently we are struggling with the needs and desires of the eight billons of us and the realising that a balance must be struck. For one pumping massive amounts of carbon into the Earth’s atmosphere is pure idiocy. It’s even greater idiocy when we have advanced and invented technologies that mean we don’t need to do it.

COP28 may be another step on the road to sanity but we continue to struggle with the realities of our situation. A human-made climate crisis and a dramatic increase in climate related catastrophes may wake us up. Perhaps every screen saver on the planet ought to be the Earthrise image.

POST: The first such image of the Earth seen from the Moon was taken by Lunar Orbiter 1 in 1966. It was in black and white and of poor quality.

[1] https://www.smithsonianmag.com/science-nature/who-took-legendary-earthrise-photo-apollo-8-180967505/

Future

The road to fixing climate change is not an endless road. Today, our whole approach to climate change goes somewhat like this:

I’m not sure I’m convinced. Yeah, maybe we have a problem. We should do something. Definitely, but send me the plans, I’ll get to it, I’m busy. Time passes. What was it we should be doing? Oh yes, but that plan is for (insert a name) not me. I’m not contributing much to the problem. Anyway, there’s time between now and (insert a date).

So, we go on. There’s no doubt that there are changes needed to tackle climate change that are immensely difficult to do. Trouble is that by fixating on those difficult problems we talk ourselves out of doing the easier things. Let’s put simple actions like home insulation on the agenda again. Let’s loosen-up on our ridiculously restrictive policy on wind farms. Let’s invest in our national electrical grid to permit more connections to be made easier and quicker.

Yes, it’s advantageous for the PR companies employed by high carbon businesses to talk up difficulties and herald small gains as miracles. I mean, that’s what they are employed to do. On the other side we have PR companies employed by activists and campaigners who paint pictures of dire consequences and delinquent Governments.

I keep pointing out the dangers of populism and nationalism. The history of both is not a good one. They generally make most people poorer and a minority richer and more powerful. However, the tactics they use to gain popular appeal don’t seem to die off down the ages. A case in point is the story of Rome and Julius Caesar, as he crushed Roman democracy and seized power[1]. The chronicle is being well told on BBC 2. In the Britian, it’s often only their incompetence that halts the progress of Caesar like characters. Not mentioning any names.

To make change happen on climate change there needs to be a greater appeal to the populous. Expecting politicians to take a lead on the subject is nice in theory but wanton of hope. In our system of governance terms of office can be measured in days. Expecting neurotic politicians to step-up to a challenge that requires real long-term commitment is asking a bit much.

Campaigners will not give up on highlighting the challenges ahead. Periodically, politicians will pick-up on that campaigning fervour and try to jump on-board. However, as soon as a more immediate public concern comes along, they will jump-off.

I’m not saying that the cost-of-living crisis isn’t a number one priority. What I am saying is that a cost-of-living crisis is not an excuse to put climate policy on a dusty shelf for another few years. The road to fixing climate change is not an endless road.

[1] https://www.bbc.co.uk/programmes/p0gjlmkv

Flight, Risk & Reflections 11.

Next year, whatever happens with COVID-19 there will be a focus on limiting greenhouse gas emissions from aviation.  In a way, the virus has already had a positive environmental impact. Less efficient aircraft are being pensioned off earlier than would otherwise be.

The European Union (EU) has said it will take part in the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) scheme from the start of its voluntary phase on 1 January 2021[1].

The COP26 United Nations (UN) climate conference will take place in a years’ time, between 1 and 12 November 2021 in Scotland[2]. All eyes will be on climate change. 

On the political climate, Downing Street dramas rival the most notable soap operas. That said, White House dramas still get top billing[3].  Some people raise the question: will the UK Government be more “collaborative and cooperative” after Dominic Cummings’ departure[4]?  Will UK Prime Minister (PM) Johnson now be exposed? I’m remined of the saying about being indispensable. If you think you are indispensable, get a glass of water and place your finger in it. Then remove the finger and observe the hole.

The Brexit trade talks enter another weekend with few signs of progress visible. Deadlines loom large in the volumes of commentary built on scant knowledge of what’s really going on. A crunch moment will come in the last week of November.

Some people say this PM is indecisive and will “cave in” on the UK’s relationship with the EU. I don’t think a radical change of direction is on the cards. The fundamental asks of a Tory Brexit haven’t changed. It’s a demand for privileges without the accompanying obligations. A Free Trade Area with a bigger neighbour with no constraints. Every time a constraint is mentioned the echo of sovereignty resounds around the room. It gets ridiculous as hard core Brexiters puff up their chests and say: you don’t show me no respect. 

Reality is reality. The EU would be unwise to let a powerful non-member have unfettered access to its market without contributing to the whole.  A problem with Dominic Cummings’ departure is that we are likely to see the Vote Leave people taking no responsibility what-so-ever for the world in 2021.  Instead when difficulties arise, they will apply their formidable campaigning skills to high power finger pointing. 

On the basis that the PM is an unscrupulous carpetbagger there will be a thin deal with the EU.  It will be presented as a great British success and the rest will be – work it out as you go along.   

[1] https://www.consilium.europa.eu/en/press/press-releases/2020/06/25/aviation-emissions-eu-confirms-its-participation-in-the-corsia-voluntary-phase-from-2021-and-chooses-more-ambitious-option-to-calculate-its-offsetting-requirements/

[2] https://www.gov.uk/government/news/new-dates-agreed-for-cop26-united-nations-climate-change-conference

[3] https://twitter.com/CBSNews/status/1327461255762817026?s=20

[4] https://twitter.com/standardnews/status/1327577348959514625?s=20