Upping the tempo

New figures released by two climate research bodies confirm that ‘greenhouse gases’ continue to build in Earth’s atmosphere and that average global temperatures made September 2013 the fourth warmest on record.

According to the World Meteorological Organisation’s (WMO) annual greenhouse gas bulletin, published this month, the levels of gases in the atmosphere that are driving climate change increased to a record high in 2012.

Atmospheric carbon dioxide (CO2) grew more rapidly in the year than its average rise over the past decade - and concentrations of methane and nitrous oxide also broke previous records.

The WMO has produced an annual greenhouse gas bulletin for the past nine years and says the warming effect on our climate as a result of carbon dioxide and other gases has increased by almost a third since 1990.

Carbon dioxide is the most important of the gases WMO tracks but only about half of the CO2 that is emitted by human activities remains in the atmosphere, with the rest being absorbed by the plants, trees, the land and the oceans.

Since the start of the industrial era in 1750,global average levels of atmospheric CO2 have increased by 141 percent.

"The observations highlight yet again how heat-trapping gases from human activities have upset the natural balance of our atmosphere and are a major contribution to climate change," said WMO Secretary-General Michel Jarraud.

"It is a worry - the more we delay action the bigger the risk we cannot stay under the 2C limit that countries have agreed," he added.

While the daily measurement of carbon dioxide in the atmosphere exceeded the symbolic 400ppm mark in May this year, the global annual average CO2 concentration will cross this point in 2015 or 2016, says the WMO.

Levels of methane also reached record highs in 2012 maintaining an upward trend since 2007 which has followed a period when they appeared to be levelling off.

Recent research indicates that the rate of increase in emissions might be slowing down - but even so the gases can continue to concentrate in the atmosphere and exert a climate influence for hundreds if not thousands of years.

Scientists suggest that the new data indicates that, after a slowdown in the rate of temperature increases over the past 14 years, global warming is returning with a vengeance.

"For the past decade or so the oceans have been sucking up this extra heat, meaning that surface temperatures have only increased slowly," said Prof Piers Forster of Leeds University.

"Don't expect this state of affairs to continue though - the extra heat will eventually come out and bite us, so there will be strong warming over the coming decades."

Should we be surprised? Not really. In September the UN's climate science panel, the IPCC, said that atmospheric CO2 concentrations were at levels ‘unprecedented in at least the last 800,000 years’.

The last time so much greenhouse gas was in the air was several million years ago, when the Arctic was ice-free, savannah spread across the Sahara desert and sea levels were up to 40 metres higher than today.

But, as the WMO points out, the amount of CO2 in the atmosphere is only half of the picture as much of the CO2 is being absorbed by the oceans.

Annual worldwide emissions from power plants, cars and other human activities are currently several billion tonnes too high to keep global temperature rises below 2C and show no sign of stopping.

Other figures released recently by NOAA’s National Climatic Data Center under its ‘State of the Climate: Global Analysis for September 2013' show the combined average temperature over global land and ocean surfaces for September 2013 tied with 2003 as the fourth highest for September on record - at 0.64C above the 20th century average of 15.0C.

The global land surface temperature was 0.89C above the 20th century average of 12.0C, marking the sixth warmest September on record.

For the ocean, the September global sea surface temperature was 0.54C above the 20th Century average of 16.2C, tying with 2006 as the fourth highest for September on record.

The combined global land and ocean average surface temperature for January to September was 0.6C above the 20th century average of 14.1C, tying with 2003 as the sixth warmest such period on record.

The Age of Miracles

Karen Walker-Thompson's novel ‘The Age of Miracles’ is not an obvious literary award winner though it is a compulsive read and contains a number of interesting themes and challenging ideas - all introduced as the result of the phenomenon of Earth’s rotation slowing.

My previous blog ‘How fragile we are’ looked at the novel’s apocalyptic catastrophe theme - the dire consequences to all life on Earth as a result of the planet’s rotation gradually slowing and therefore extending both day and night.

But there are more subtle implications also to be considered when looking at the effects exaggerated daylight and dark hours might have on the normal working of our own bodies.

Midway through the book at the beginning of chapter 17, Thompson-Walker writes: "Two thousand years of art and superstition would suggest that it is darkness that haunts us most... but dozens of experiments conducted in the aftermath of the slowing revealed that it was not darkness that tampered most with our moods - it was light."

The implication, though not the cause, of night turning into day is not a million miles from the theme adopted by The Lighthouse Keeper for two of this autumn’s blog essays - ‘Fear of the dark’ and ‘Blinded by the night’.

It is now well-established by the medical profession that working through the night and the influence of light after dark can affect our circadian rhythms and long-term health and well-being in significant ways.

In his 2012 paper ‘Light Pollution, Nuisance and Planning Laws in the UK’ Martin Morgan-Taylor, principal lecturer in law at Leicester’s De Montfort University, states that artificial lighting is known to cause "some fairly obvious negative effects on human health and well-being" - in as much as floodlighting or illuminated advertising hoardings may disturb sleep by shining in bedroom windows.

"Indeed, it may be thought that sleeplessness may cause only temporary or negligible problems, but medical research is increasingly linking artificial light at night with some serious health effects, such as cancer and depression," he says.

"Other research indicates that artificial light at night may general disrupt human circadian rhythms."

In addressing the question of why this might by the case, Prof Morgan-Taylor pins the likely cause on what is known is that ‘white’ or ‘blue rich’ lighting, which mimics natural daylight and is being increasingly used at night.

"This type of light particularly suppresses the production of a circadian rhythm hormone called Melotin, so disturbing circadian rhythms," he states. Melotin is believed to be a powerful anti-oxidant that helps to ward off some human cancers.

"In other words, an avoidable exposure to ‘white/blue rich’ light at night may increase a person’s susceptibility to some cancers - and we are increasing our use of this form of lighting at night," he adds.

In ‘The Age of Miracles’ the world at large is thrust into ever-lengthening days and nights as Earth slows gradually from its standard 24 hour rotation.

At first the consequences are manageable, more of an inconvenience, but as the daylight hours stretch into periods of 30 and then 40 hours, and likewise the night, the effects on daily life become ever more pronounced and difficult. 

The terminator dividing day from night across Earth as seen
from the International Space Station.

The novel takes the concept of our bodies adapting to unnatural light patterns to a whole new level - but in considering current light pollution levels across the developed world (in England it increased by 24 percent between 1993 and 2000) the extrapolation is valuable.

The first chapter of Genesis in the Bible states that God ‘divided the light from the darkness’, which in Biblical terms can be viewed as both symbolic as well as being a statement about the natural environment. In essence we need them both because light allows us to see and darkness gives us an opportunity to sleep.

By lighting our neighbourhoods, towns and cities to excess and flooding our yards with unnecessary light we are wasting energy and undoubttedly contributing to climate change. In a more subtle way we may also be tampering with the laws of nature - and perhaps even creation itself. 

How fragile we are

The Lighthouse Keeper isn’t an avid reader of modern-day fiction but, determined to unearth a holiday read for a change, succumbed to the much talked about first novel by Karen Thompson-Walker ‘The Age of Miracles’, first published in 2012.

Written from the viewpoint of a woman looking back at her childhood, the ordinary moments of life and adolescence become more profound in the light of an unfolding disaster affecting all life on Earth.

The apocalyptic story is conjured from the idea of a ‘slowing Earth’, the germ of which, according to Thompson-Walker, stems from the powerful Indonesian earthquake and tsunami of 2004 which physically affected the rotation of Earth and shortened our days by a fraction of a second.

‘The Age of Miracles’ pursues the concept to its maximum - the rotation of Earth continuing to slow and slow, thus inflicting enormous and ultimately unmanageable changes on our normal daily existence.

Whilst making broad 'scientific' assumptions in parts, it is convincingly unsettling and points ultimately to how fragile society at large really is.

As it happened, I finished reading the novel in the wake of the giant typhoon that devastated the Philippines in November 2013, killing thousands of people and wrecking the lives of many more.

The suggestion that the increasing frequency and potency of such storms, droughts, intensive heat waves and floods around the world are linked to mankind’s increasing consumption of fossil fuels and the resultant global warming is ignored at our peril.

If, as a global population, we continue to release more and more energy into our system we shouldn’t really be surprised that it will have consequences.

Heat a pan of cold water on the stove and what happens? The more energy in the form of heat that transfers into the water the hotter and more agitated it becomes - a previously relatively stable environment is soon transformed.

Thompson-Walker describes ‘The Age of Miracles’ as a novel about a catastrophe that no one was expecting. "We sometimes over-estimate what we know about the world but I think we all live with more uncertainty than we like to think," she says.

Such a point is brought resolutely home when we view pictures on our TV screens of a natural disaster like in the Philippines caused by one of the largest and most aggressive typhoons ever recorded.

Yet distance and the remote nature of such events in relation to our own daily lives logically means we are seldom moved to any kind of action - either direct or indirect, on behalf of those affected or our future selves.

If, as a global population, we continue to rack up the temperature of our planet then we shouldn’t be surprised when stronger and more devastating natural events are unleashed at more frequent intervals.

We are, perhaps incontrovertibly, becoming just like the anecdotal frog that is placed in a pan of gradually warming water and gets so accustomed to the rising temperature that by the time it is too hot it can no longer jump out.

The story is often used as a metaphor for the inability or unwillingness of people to react to ultimately significant changes that occur gradually.

Today, in respect of climate change, we just about still have a choice. But the point of no return is creeping alarmingly close and there are warning signs all about - not least in the just ended UN Climate talks in Warsaw.

The blog title is taken from the lyric of ‘Fragile', a song composed by English musician, singer-songwriter, multi-instrumentalist, activist, actor and philanthropist Sting and first released on his 1987 album ‘Nothing Like the Sun’. Sting (Gordon Sumner, CBE) was also the principal songwriter, lead singer and bassist for the rock band ‘The Police’.

Blinded by the night

Winter sunset over the Solent from Portsdown Hill - Clive Simpson

It is hardly surprising to learn that in our modern, consumer-driven culture we are using far more light during the hours of darkness than we actually need.

But what is not generally recognised in our liberal use of illumination is the mounting cost to both the environment and ourselves.

An increasing number of scientific studies are questioning the long-held premise that humans are largely immune to the effects of artificial light at night.

And our own eyes, if only we opened them long enough in a metaphorical sense to see the bigger picture, would surely agree.

Research indicates that artificial nocturnal light - even in quite small doses - disrupts sleep, confuses circadian rhythms and impedes the production of the hormone melatonin.

All of which is bad news if the consequences of excessive exposure to light at night really do include an increased risk for obesity, diabetes and cardiovascular disease.

Technological advances such as LEDs (light-emitting diodes) have certainly improved the potential for better targeted lighting - but they are often brighter and more intrusive than the old lights they are replacing.

And much more of this modern light - whether from TVs, computer screens and electronic gadgets or from outdoor lighting of one form or another - is rich with blue wavelengths and most disruptive to the 24 hour biological process that regulates the body's functions.

In effect, blue light sends subtle messages to our brain that night is over – or in a basic, primal way that morning's blue sky has returned and that the day has begun - quite the opposite signal we need in the middle of the night.

Two years ago the American Medical Association (AMA) called for increased research into the risks and benefits of occupational and environmental exposure to artificial light at night and for the introduction of new lighting technologies at home and at work that minimise circadian disruption.

According to Prof Martin Morgan Taylor, of the School of Law, De Montfort University, Leicester, and a Legal Advisor (Lighting) to the UK Campaign for Dark Skies, the physiological effects caused by lighting may be similar to noise.

In his paper ‘Light Pollution and Nuisance: The Enforcement Guidance for Light as a Statutory Nuisance' he says: "Admittedly, there are comparatively few studies as yet on the problems caused by lighting, but lights can and do wake people up, as does noise.

"Moreover, with noise it appears that the subject does not need to be fully awakened to suffer the same negative effects as someone who has been deprived of sleep altogether."

As a result, people's health could be adversely affected by the floodlighting and what the Chartered Institute of Environmental Health (CIEH) refers to as ‘light briefly turning on and off' during the night.

Prof Morgan Taylor states the research concerning cancer risks does not restrict itself to lighting that wakes the subject but the risk factor is akin to the level of night-time light entering the bedroom.

"The glare from overly bright lighting can also cause further problems, for although the iris may contract to cut down the amount of light entering the eye, the scale of the glare from floodlighting can cause momentary blindness and pain," he says. "This is particularly an issue for the elderly, as the muscles controlling the iris do tend to become less efficient with age."

On a personal level, while we seldom leave our interior lights bare, most of our outdoor lighting remains unshielded – indiscriminately sending light straight into the sky, into our eyes, and into our neighbours' bedrooms.

The relatively simple act of adjusting or shielding outdoor lights by installing or retrofitting lamp fixtures that direct light downward to its intended target represents our best chance to control light pollution.

The generic objection to this - based on the premise that light equals protection and darkness represents danger - is that we need all this light for safety and security.

This common belief goes a long way to explain why many supermarkets, petrol station forecourts and car parks as well as our own driveways and yards are lit more than ten times as brightly as they were just 20 years ago.

In fact, the issue of light at night and safety is rather more complex, with little compelling evidence to support widespread assumptions.

For example, ever-brighter lights can actually diminish security by casting glare that impedes vision and creates shadows where criminals can hide.

The ‘World Atlas of the Artificial Night Sky Brightness', a series of computer-generated maps from satellite data that depict the extent of light pollution across the globe, were created by Italian astronomer Fabio Falchi and illustrate the point nicely.

Today, or to be correct, tonight, we have levels of light hundreds and thousands of times higher than the natural night time level – and light pollution is currently rising by an average of 20 per cent a year.

So this evening, before you flood the yard or your front drive with brilliant light, consider for a moment the opposite side of the day. Would we tolerate, with the same kind of indifference, attempts to modify the daytime by lowering light levels a hundred or a thousand times?

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If you enjoyed this Lighthouse Keeper essay by Clive Simpson looking at the impact of artificial light at night in our modern world please recommend or Tweet the link - Blinded by the night. The title is derived from ‘Blinded by the Light', a song written and originally recorded by Bruce Springsteen and widely known through the 1976 chart-topping version recorded by Manfred Mann's Earth Band.

Fear of the dark

Even lighthouse keepers - at one time true custodians of light - are an endangered species these days, their solitary and lonesome existence largely replaced by automated and computer-controlled systems.

But just as technology has seemingly usurped most aspects of human endeavour and experience - including the once dark night-time skies in the heavens above - the UK’s cross channel neighbour has, as it were, ‘seen the light’. Vive la France!

At the end of August, as its populous was returning to work after ‘les grandes vacances’, the whole country grew darker through the night as one of the world’s most comprehensive lighting ordinances came into effect.

Now, in the early hours of every morning between 1 am and 7 am, shop lights are being turned off and lights inside office buildings must be extinguished within an hour of workers leaving the premises.

Lighting on France’s building facades cannot be turned on before sunset and, over the next two years, new regulations restricting lighting on advertising hoardings will also take effect.

These rules are designed to eventually cut carbon dioxide emissions by 250,000 tons per year, saving the equivalent of the annual energy consumption of 750,000 households and slashing the country’s overall energy bill by 200 million Euros a year.

But, according to France’s Environment Ministry, no less a motivation is to ‘reduce the footprint of artificial lighting on the nocturnal environment’.

This is a powerful acknowledgement that excessive use of lighting is not only consuming too much energy but is endangering our health and the health of the ecosystems on which we rely.

Researchers are now focusing on the impacts of so-called ecological light pollution and warn that disrupting the natural patterns of light and dark - and thus the structures and functions of ecosystems - is having a profound impact far beyond what we realise.

It’s a global problem and is worsening by the month as countries like China, India and Brazil become increasingly affluent and urbanised.

Views of Earth at night show vast areas of North America, Europe, the Middle East, and Asia glowing with light. Only the world’s remotest regions - Siberia, the Tibetan plateau, the Sahara Desert, the Amazon, and the Australian outback remain cloaked in darkness.

Some countries, including the UK, have enacted limited regulations to reduce light pollution but in reality most nations and cities still do little to manage our excessive, almost compulsive, use of light.

The photographs below show the UK and London at night as seen by astronauts on the International Space Station (ISS). It serves as a poignant illustration of the point in question - namely that as both individuals and nations we are using far too much artificial light with little or no consideration for either cost, the environment or our own health.

As the autumn nights draw in, this is the first in a series of short Lighthouse Keeper essays looking at the impact of artificial light at night in our modern world. The title draws from Gordon Giltrap’s classic 1978 album ‘Fear of the Dark’ which was re-released in 2013 and is newly remastered from the original tapes, including eight extra tracks drawn from a series of singles released between 1978 and 1980. ‘Fear of the Dark’ , a Lighthouse Keeper 'top ten' album, saw Giltrap backed by a band of outstanding musicians: John G Perry (Bass), Rod Edwards (keyboards) and Simon Phillips (drums) and featured many outstanding tracks. 

For more articles in this series search under 'artificial light' on the adjacent tag cloud.

Chinese space station

China expects to complete its first orbiting space station within a decade and be able to send crews of up to six people there for short-term missions.

Chinese officials revealed details of the country’s space plans for low Earth orbit during the 64th International Astronautical Congress (IAC) taking place in Beijing, China, this week.

Mr Dazhe Xu, general manager of China Aerospace Science and Technology Corp, said the station - covering an area of 60 square metres - would be capable of supporting three astronauts on long-term flights.

Before that China will launch the Tiangong-2 space laboratory in around two years to test renewable life support and in-orbit refuelling systems, technologies that will be essential for the safe operation of the planned space station.

Mr Xu revealed that one cargo 'shuttle' and several crewed spacecraft will be launched to dock with Tiangong-2 at different times.

According to the China Manned Space Engineering Office, the space station will consist of three capsules and a cargo 'shuttle' to transport supplies.

The station's core module will be 18.1 m in length and will weigh 20 to 22 metric tons. It will be attached to two self-contained laboratories.

Mr Wang Zhaoyao, director of the China Manned Space Agency, said that once operational astronauts will be scheduled for long-term missions in orbit, conducting a wide range of technical tests as well as medical, science and educational experiments.

Liu Yang, China's first female astronaut - who appeared with her colleague Wang Yaping, the second Chinese female astronaut who flew into space on Shenzhou 10 in June 2013 - repeated the declaration that her nation would also be willing to accept foreign astronauts for future missions.

The country successfully carried out its first manual space docking, another essential step in building a space station, in June last year when three Chinese astronauts piloted Shenzhou 9 to link up with Tiangong-1.

China became the third country to independently launch a human into space in 2003 and has been rapidly expanding its space programme ever since.

Berndt Feuerbacher, former president of the International Astronautical Federation (IAF), said that China's space programme was developing quickly and actively looking for cooperation opportunities.

The annual IAC space congress has a record number of around 3,500 space scientists and business people attending this year, representing some 74 countries from across the world.

http://www.bbc.co.uk/news/science-environment-24282060

The above is one of a series of daily reports from the International Astronautical Congress 2013 held in Beijing, China, written by Clive Simpson for the Paris-based International Astronautical Association (IAF) and first appearing on the IAF website

Back to the blues

There is sometimes a fine line when it comes to discerning the difference between the colours of green and blue - as British Prime Minister David Cameron has been finding out.

His bold claim on coming to power to be leading the "greenest government ever" seems to be turning into something of a wistful ruse at best.

The summer’s unresolved fracas over fracking for shale gas didn’t really help matters but the latest salver came from a more unlikely source - a Conservative party donor.

Alexander Temarko, a significant British energy investor, claims investors in renewable technologies are being scared off by "seriously mis-leading" messages from the Government.

The Russian businessman, who has made donations in excess of £50,000 to the Conservative party, believes the Government is now paying little more than "lip service" to renewable energy.

Temarko says that failing to provide the clear targets investors need before committing to long term green electricity generation projects is squandering the opportunity to create thousands of jobs and generate billions of pounds in revenues.

The charge is levelled equally at the Prime Minister, his Chancellor of the Exchequer, George Osborne, and, to a lesser extent, at Ed Davey, the Energy and Climate Change Secretary.

In fairness, Davey campaigned to include a requirement in the Energy Bill - currently progressing through Parliament - that would have required the UK's electricity supply to become almost entirely ‘green' by 2030.

But Osborne replaced the target with less onerous wording that grants the Government the power from 2016 to require Britain's electricity supply to become almost entirely green only at some point in the future and should it choose to do so.

All this comes at a time when the country’s profit-hungry big six energy companies are about to announce another inflation-busting price hike to gas and electricity prices.

An exception to the rule is Ecotricity which announced mid-September that it was ending its ‘Big Six price match’ under which the small energy provider had matched each Big Six standard tariff in their home regions.

This delivered green energy for the price of brown and meant that, for most people in Britain, it costs no more to be with Ecotricity.

The company’s new pricing promise is that it will charge less than each of the Big Six standard tariffs - delivering green energy for less than the price of brown.

In the meantime, the Prime Minister and his Government’s ‘green' credentials have shifted chamaeleon-like back through the political colour spectrum to the traditional Conservative party blue.

And Temarko is right in one sense - the lack of a sound, long term energy policy is doing no one in the UK any favours.

This piece was originally scheduled for publication on 21 September 2013 but the Lighthouse Keeper was unable to access his blog due to Chinese internet restrictions whilst on assignment in Beijing and so it has been published retrospectively. The title is inspired by the album of the same name from the late Gary Moore (1952 – 2011), a musician from Belfast, Northern Ireland, best recognised as a blues rock guitarist and singer. In a career dating back to the 1960s, Moore played with artists including Phil Lynott and Brian Downey and was a member of the Irish rock band Thin Lizzy.