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Posts Tagged ‘Light Pollution’

Shedding Light: a Survey of Local Authority Approaches to Lighting in England

April 28, 2014 Leave a comment

Last Friday 25 April 2014 the Campaign to Protect Rural England (CPRE) released a report (pdf) entitled “Shedding Light: a Survey of Local Authority Approaches to Lighting in England”, that addresses the growing problem of light pollution in rural areas.

Light pollution from towns and cities spreads a long way, lighting the sky up and spoiling the view of the stars even in areas with few or no lights of their own. However that’s only the tip of the iceberg. According to CPRE:

Street lighting in England costs councils approximately £616m per year and can account for up to 30% of their carbon emissions so tackling light pollution will have a triple benefit – cutting costs and carbon too.

Although around one third of councils surveyed were switching lights off between midnight and 5am, when they aren’t needed, and around one half of councils dimming lights at similar times, there is still much more to be done.

Image from the CPRE report: Light pollution of Eastbourne, from Warren Hill

Image from the CPRE report: Light pollution of Eastbourne, from Warren Hill

According to Emma Marrington, CPRE Dark Skies Campaigner:

‘The results of our survey show that many local authorities are taking steps in the right direction to manage lighting more effectively. But much more can be done to encourage all authorities to take this issue more seriously.

‘We urge councils to do more to control lighting in their areas, and ensure that the right lighting is used only where and when it is needed. We often hear concerns that changing street lighting can impact on public safety but our research revealed no evidence to support this. We’re not advocating changes where they’re not appropriate, but why shine bright lights on residential streets, quiet roads and open countryside throughout the night when it’s not needed?

‘Genuine dark starry nights are becoming harder and harder to find which is why councils should take action to control it now. Light pollution blurs the distinction between town and country, ruins the countryside’s tranquil character and denies us the experience of a truly starry sky.’

CPRE ends the report by making nine recommendations:

  1. Light pollution policy All local authorities should have a policy to control light pollution in their Local Plan, in line with the National Planning Policy Framework and the associated National Planning Practice Guidance on light pollution. This should include identifying existing dark areas that need protecting.
  2. Street lighting policy Local authorities should consider  preparing a Street Lighting Policy, which could include Environmental Lighting Zones to ensure that the  appropriate lighting levels are  used in each zone, with very strict requirements applying in identified dark areas.
  3. Part-night lighting schemes We encourage local authorities to investigate how part-night lighting schemes (e.g. switching off between midnight and 5am) or dimming could work in their areas, including examining the cost, energy and carbon savings. This should be done in full consultation with the local community.
  4. LANTERNS research project All local authorities who are switching off or dimming street lighting should monitor crime and accident statistics and consider taking part in the Institution of Lighting Professionals/LANTERNS research project which aims to quantify any effects of changes to street lighting on road traffic accidents and crime.
  5. LED lighting Local authorities should give careful consideration to the type of Light Emitting Diode (LED) lighting they use and consider the potential impacts that higher temperature blue-rich lighting has on ecology and human health.
  6. Targets for replacing lights Local authorities with responsibility for street lighting could set targets for replacing all their street and road lights with less light polluting types, such as full cut off flat glass lamps.
  7. Testing new street lighting New street lighting should be  tested ‘in situ’ before a lighting scheme is rolled out across a wider area to ensure that it is the minimum required for the task and does not cause a nuisance to residents.
  8. Preserving dark skies Local authorities should have a strong presumption against new  lighting in existing dark areas,  unless essential as part of a new development or for public safety reasons that have been clearly demonstrated.
  9. Highways Agency guidance The Highways Agency should review the lighting section of the Design Manual for Roads and Bridges, which is used to design motorway and trunk road lighting, to ensure it remains relevant for local authorities.

The whole report makes for interesting reading, but a few things stand out:

  • only 65% of councils in England have a policy on lighting
  • 87% of these councils said it was a continuation of an existing policy; only 13% had adopted a new policy as a result of the 2012 National Planning Policy Framework (NPPF).
  • The top three reasons that councils were switching off  lights at night are:
  1. 95%: Energy Saving
  2. 91%: Cost Saving
  3. 43%: Reduced Light Pollution
  • The top three reasons that councils were switching off  lights at night are:
  1. 97%: Energy Saving
  2. 78%: Cost Saving
  3. 54%: Reduced Light Pollution
  • 11 councils said that dimming schemes had gone largely unnoticed by the community
  • 91% of councils that are switching off lights are continuing to work with local police to monitor local crime statistics

International Dark Sky Week 20-26 April

April 20, 2014 Leave a comment

Sunday marked the start of International Dark Sky Week 20-26 April 2014, a global initiative to get people out of towns and cities and seeing a night sky as it’s meant to be seen, unspoiled by light pollution.

City Lights To Dark Skies from Mark Gee on Vimeo.

Most of us live in urban environments these days, with the ever-present orange glow lighting the night sky. From my garden in Glasgow I can see only a few hundred start on a clear night. But if I traveled south by car for an hour down to Galloway Forest Dark Sky Park, or north by the same distance to Loch Lomond National Park, I’d count thousands of stars.

DSA800x_202And then if I made more of an effort to get to the very darkest parts of our country (the heart of Galloway Forest, or Northumberland Dark Sky Park, or up to Coll Dark Sky Island) the number of stars would be overwhelming, too many to count.

At this time of year in the UK (especially in Scotland) you’ve got to wait until quite late to see the sky free of twilight (2230 in Exmoor Dark Sky Reserve for example, 2330 in Coll, and after midnight up in the Orkney Islands), but it’s worth making the effort if it’s clear.

If you do head out this week here are a few things to watch for:

 

The Lyrids meteor shower will reach its peak on 21/22 April but you might catch some early Lyrids in the days beforehand, and some after the peak; the darker your skies the more you’ll see.

Cygnus the Swan, and the other stars of the Summer triangle will be rising high in the east after midnight. In the right wing of the swan is the star Kepler-186, with the new-found twin Earth, known as Kepler-186f. The star is far, far too faint to see, even with a very powerful telescope, but you can still look in that direction and give a little wave.

 

Dark Sky Islands

April 11, 2014 1 comment

There are only two International Dark Sky Islands in the world, and both of them are in the British Isles: Sark in the Channel Islands; and Coll in the Inner Hebrides.

Sark

Sark

Coll

Coll

They were designated by the IDA (the International Dark-sky Association) under their International Dark Sky Communities programme, Sark in 2011 and Coll in 2013.

These beautiful short films show what you’ll see on a clear night:

The Starry Skies of Sark from Sue Daly on Vimeo.

Isle of Coll – IDA Dark Sky Community from Ewan Miles on Vimeo.

I’ve visited both islands several times, and they’re beautiful places, and not just at night when the stars come out. They’re very different: Sark is lush, with hedgerows and country lanes, and at 49°25’N latitude its climate is very continental. Coll on the other hand is almost entirely treeless, it’s rugged, boasts long sandy beaches, and lies at 56°38’N. Contrary to common impressions of the weather on the west of Scotland, Coll is one of the sunniest parts of Scotland and so has, like Sark, a high number of clear dark nights.

And it’s on dark nights when these islands are at their most stunning. Now that summer’s on its way though the dark nights will shorten and eventually disappear altogether until autumn, so you’ve plenty of time to plan your visit. Sark has a longer dark sky season, running from August till mid-May, as opposed to Coll’s which runs from September till mid-April, but the nights are longer on Coll than on Sark during the darkest winter months, the best time for stargazing.

Make sure that if you’re going to Sark or Coll for stargazing that you avoid the bright moon. Ideally you would be there during a new moon or thin crescent; at the very least you should avoid the week on either side of the full moon. To maximise your chances of seeing the wonderful dark skies make sure you stay for several nights!

Light Pollution and Birds: Early Bird Survey

January 8, 2014 Leave a comment

The negative effect of light pollution on wildlife has long been known, specifically – but not exclusively – its effect on bats, bugs, and sea turtles. Now the British Trust for Ornithology (BTO) are running an Early Bird Survey, asking people in the UK to monitor the pre-dawn feeding times of garden birds to see what – if any – effect light pollution is having.

To take part you need to get up before dawn* on 9** January 2014 (tomorrow, as I write this), watch your garden bird feeders, and record the times that the first ten species arrive to feed. You can download the full instructions here (pdf), and submit your observations here.

* dawn occurs at different times around the UK, so you should find your sunrise time and get up half an hour earlier than that, during civil twilight.
** observations on 10, 11, and 12 January are welcome too.

As the BTO website says:

Winter is not an easy time for birds. They need extra energy to keep warm, especially during long winter nights. To cope with this, they lay down extra fat reserves, though small birds quite often only lay down enough for a single night. Longer nights not only affect the amount of energy a bird uses, they also reduce the amount of time that birds can feed in. Birds, therefore, have to make the most of the daylight hours to replenish their energy reserves before it gets dark.

The 2004 BTO Shortest Day Survey, run in association with BBC Radio 4, investigated the patterns behind birds arriving at garden bird feeders first thing on a winter’s morning. Building on observations from the Shortest Day Survey, the Early Bird Survey will investigate what effect, if any, light and heat pollution have on the feeding patterns of birds during a cold winter’s morning.

Northumberland and Coll: The Newest International Dark Sky Places

December 9, 2013 2 comments

The International Dark-Sky Association (IDA) announced today it has designated two new International Dark Sky Places in the UK, including one representing the largest land area of protected night skies in all of Europe. This brings to six the total number of IDA International Dark Sky Places in the UK, second only to the United States.

IDA is proud to recognise Northumberland  Dark Sky Park and Coll Dark Sky Island for their exceptional efforts in helping preserve and promote dark night skies over Britain.  I have worked with both of these areas as a dark skies consultant, advising them on the process of achieving dark sky status. To date this puts the number of dark sky places that I have been heavily involved in to five; more than anyone else in the world, I think!

The reasons for these areas seeking dark sky status are many and varied. Off-season winter astronomy tourism is one main driver, while for councils the economic and environmental benefits of night-sky-friendly zero-waste lighting are paramount. Northumberland County Council have recently announced an investment of £24million to refit all public street lights in the county to energy efficient LED lights, fittings which pay back the initial investment within 6-8 years through reduced operating costs, and which have a significantly reduced carbon footprint, due to their efficiency and the fact that no light is wasted – it all shines down to the ground where it’s meant to be, rather than into the sky.

Stargazers at Cawfields, Northumberland Dark Sky Park

Stargazers at Cawfields, Northumberland Dark Sky Park

Northumberland International Dark Sky Park

A UK National Park and adjacent forestry plantation encompassing nearly 580 square miles (1500 km2) of public lands in northern England, Northumberland National Park and Kielder Water & Forest Park are the first IDA-recognized International Dark Sky Park consisting of two independent parkland units.

Once at the frontier of Roman Britain where Hadrian’s Wall repelled Pictish invaders, Northumberland International Dark Sky Park now serves as a bulwark against the incursion of harmful light pollution into one of the darkest locations in England.

With today’s IDA announcement, National Parks UK and Forestry Commission England adds dark skies to their portfolio of protected natural resources including the largest manmade woodland and reservoir in northern Europe. Kielder Forest provides Britain with 200 million board feet (475,000 m3) of timber annually.

The dark night sky attracts an increasing number of visitors to the region. Kielder Observatory, the UK’s largest and most active public observatory, widely promotes local astronomy events and activities. “Dark skies and astronomy have become a passion in the area,” according to Heidi Mottram, Chair of the Kielder Water and Forest Park Development Trust and Chief Executive of Northumbrian Water.

As both Northumberland National Park and Kielder Water & Forest Park began to vie independently for IDA recognition, it quickly became evident that two heads were better than one.  “It made perfect sense to work together to protect one of our greatest assets and make it available to more people,” Mottram said.

Park officials hope that protecting dark skies through the promotion of responsible outdoor lighting will increase the allure of Northumberland as a tourism destination.

“Becoming a Dark Sky Park will reinforce the status of Northumberland as an unspoiled destination offering a true sense of tranquility and wildness – a tonic in this day and age,” said Tony Gates, Chief Executive of Northumberland National Park.

Coll International Dark Sky Island

A sparse population and geographic isolation make the night skies over the Isle of Coll among the darkest in Europe. The island adopted a quality outdoor lighting management plan to ensure Coll remains dark for many future generations of residents and visitors.

Coll lies about six miles (10 km) west of coastal Argyll and hosts just over 200 residents. It attracts dozens of bird species according to the Royal Society for the Protection of Birds, which owns an extensive reserve at the west end of the island and hosts one of Coll’s recognized night sky viewing sites on its land. Nature tourism in part draws thousands of visitors to the island each year.

“Achieving dark skies status will be great for the island in many ways,” Julie Oliphant, hotelier at the Coll Hotel, explained. “Not only will it ensure that any future development on the island is done in a way that protects Coll’s natural and unspoiled beauty, but it will also help promote winter tourism.”

Fred Hall of the Argyll and Bute Council echoed the sentiment. “The Isle of Coll is a unique island in many ways, not least of which is its beautiful countryside and sea views but also the lack of light pollution,” he said. “I can think of no better island in the inner Hebrides to gain the Dark Skies accolade.”

Northumberland  is IDA’s thirteenth International Dark Sky Park, while the Isle of Coll becomes the world’s fifth International Dark Sky Community. They join four existing International Dark Sky Places in Britain: Galloway Forest Park in Scotland, Isle of Sark in the Channel Islands, Exmoor National Park in England, and Brecon Beacons National Park in Wales.

If you’re interested in gaining dark sky status for your area, then get in touch!

Light Pollution and the Loss of Wilderness

April 21, 2013 Leave a comment

Today marks the 175th anniversary of the birth of John Muir, the Scottish-born American naturalist, writer, and advocate for the preservation of wild land.

20130421-165126.jpg

The protection of our wildernesses landscapes (defined as anywhere you cannot see the intrusion of human activity) is more important than ever, with the spread of suburbia and the urbanisation of more than 50% of the world’s population.

But one measure of what makes a wilderness has to-date been largely ignored: that of the darkness of the night sky. After all, if you can see the sky glowing orange at night then you are seeing the intrusion of human activity, and you can’t consider the land you’re in a true wilderness.

John Muir’s legacy as the founding father of the conservation movement lives on today, in part in the organisation The John Muir Trust.

The JMT estimates that the amount of Scotland’s landscape that is wilderness is rapidly diminishing, dropping from 31% of Scotland to 28% between 2008 and 2009, but I think if you added in the spread of man-made light pollution the situation would be decidedly worse.

I am fortunate to have been awarded the JMT’s Bill Wallace award to help fund a trip later this year (once the skies get dark again after the bright summer nights) to map light pollution in one of Scotland’s most wild landscapes, between the JMT properties of Quinag and Sandwood Bay.

Hopefully this project – the first of its kind in this remote area – will shed some light on the problem of the loss of our wilderness nightscapes.

International Dark Sky Places

June 14, 2012 4 comments

The global family of International Dark Sky Places – areas with stunning night skies and exemplary lighting controls to preserve those skies – has grown again recently, with the addition of some huge parks and reserves. There are currently (as of June 2012) 18 places around the world that satisfy the International Dark-sky Association‘s (IDA) requirements.

The Church of the Good Shepherd, Aoraki Mackenzie IDSR Image by Fraser Gunn

I’ve been lucky enough to visit 12 out of these 18 incredible places, including the two most recent additions to the IDA family, NamibRand Nature Reserve in Namibia, and Aoraki Mackenzie in New Zealand, both of which have been awarded International Dark Sky Reserve status this year.

The IDA has three different designations: International Dark Sky Park (IDSP), International Dark Sky Reserve (IDSR), and International Dark Sky Community (IDSC).

IDSPs are areas of public land that are near-empty wildernesses, and which have enacted strict controls of outside artificial lighting throughout the entire park. There are currently ten IDSPs.

IDSRs are large areas centred on a dark sky core, a significant area – an observatory, say – in need of protection against light pollution, and a 15km-minimum buffer zone around that core, encompassing surrounding communities. The communities in the buffer zone have lighting controls that help minimise light pollution in the core area. There are currently four IDSRs.

IDSCs are communities – cities, towns, villages, islands – that have enacted exemplary lighting controls to limit the spread of light pollution into their night skies. There are currently four IDSCs.

The following table has some information about the various International Dark Sky Places:

Name Location Park Area Designation Year Designated
Aoraki Mackenzie New Zealand  4300 km2 Reserve  2012
Big Bend National Park Texas, USA  3242 km2 Park  2012
Borrego Springs California, USA  110 km2 Community  2009
Cherry Springs State Park Pennsylvania, USA  4.3 km2 Park  2008
Clayton Lake State Park New Mexico, USA  1.9 km2 Park  2010
Exmoor National Park England, UK  692 km2 Reserve  2011
Flagstaff Arizona, USA  255 km2 Community  2000
Galloway Forest Park Scotland, UK  780 km2 Park  2009
Geauga Observatory Park Ohio, USA  4.5 km2 Park  2011
Goldendale Observatory State Park Washington, USA  0.2 km2 Park  2010, provisional
The Headlands of Emmet County Michigan, USA  2.2 km2 Park  2011
Homer Glen Illinois, USA  58 km2 Community  2011
Hortobagy National Park Hungary  800 km2 Park  2011
Mont Megantic Quebec, Canada  5000 km2 Reserve  2008
NamibRand Nature Reserve Namibia  1722 km2 Reserve  2012
Natural Bridges National Monument Utah, USA  31 km2 Park  2006
Sark Channel Islands, UK  5.4 km2 Community  2011
Zselic Landscape Protection Area Hungary  90.4 km2 Park  2009

 

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