Author: Neville

  • Wavier jet stream ‘may drive weather shift’

    15 February 2014 Last updated at 19:32

    Wavier jet stream ‘may drive weather shift’

    Pallab Ghosh By Pallab Ghosh Science correspondent, BBC News, Chicago

    Pallab Ghosh: “We may have to get used to winters where spells of weather go on for weeks – or even months”

    New research suggests that the main system that helps determine the weather over Northern Europe and North America may be changing.

    The study shows that the so-called jet stream has increasingly taken a longer, meandering path.

    This has resulted in weather remaining the same for more prolonged periods.

    The work was presented at the annual meeting of the American Association for the Advancement of Science (AAAS) in Chicago.

    The observation could be as a result of the recent warming of the Arctic. Temperatures there have been rising two to three times faster than the rest of the globe.

    According to Prof Jennifer Francis of Rutgers University in New Jersey: “This does seem to suggest that weather patterns are changing and people are noticing that the weather in their area is not what it used to be.”

    Continue reading the main story

    “Start Quote

    We can expect more of the same and we can expect it to happen more frequently”

    Prof Jennifer Francis Rutgers University

    The meandering jet stream has accounted for the recent stormy weather over the UK and the bitter winter weather in the US Mid-West remaining longer than it otherwise would have.

    “We can expect more of the same and we can expect it to happen more frequently,” says Prof Francis

    The jet stream, as its name suggests, is a high-speed air current in the atmosphere that brings with it the weather.

    It is fuelled partly by the temperature differential between the Arctic and the mid-latitudes.

    If the differential is large then the jet stream speeds up, and like a river flowing down a steep hill, it ploughs through any obstacles – such as areas of high pressure that might be in its way.

    If the temperature differential reduces because of a warming Arctic then the jet stream weakens and, again, like a river on a flat bed, it will meander every time it comes across an obstacle.

    This results in weather patterns tending to becoming stuck over areas for weeks on end. It also drives cold weather further south and warm weather further north. Examples of the latter are Alaska and parts of Scandinavia, which have had exceptionally warm conditions this winter.

    In the UK, storm after storm has rolled across the country In the UK, storm after storm has rolled across the country

    With the UK, the US and Australia experiencing prolonged, extreme weather, the question has been raised as to whether recent patterns are due to simple natural variations or the result of manmade climate change? According to Prof Francis, it is too soon to tell.

    “The Arctic has been warming rapidly only for the past 15 years,” she says.

    “Our data to look at this effect is very short and so it is hard to get a very clear signal.

    “But as we have more data I do think we will start to see the influence of climate change.”

    Prof Francis was taking part in a session on Arctic change involving Mark Serreze, the director of the US National Snow and Ice Data Center in Colorado.

    He said the idea that changes in the polar north could influence the weather in middle latitudes – so-called “Santa’s revenge” – was a new and lively area of research and somewhat controversial, with arguments for and against.

    “Fundamentally, the strong warming that might drive this is tied in with the loss of sea-ice cover that we’re seeing, because the sea-ice cover acts as this lid that separates the ocean from a colder atmosphere,” Dr Serreze explained.

    “If we remove that lid, we pump all this heat up into the atmosphere. That is a good part of the signal of warming that we’re now seeing, and that could be driving some of these changes.”

    Chicago 6 January Chicago is now warming after being gripped by frigid polar air in January

    Follow Pallab on Twitter

    More on This Story

    Related Stories

    Related Internet links

    The BBC is not responsible for the content of external Internet sites

    More Science & Environment stories

    RSS

    Features & Analysis

    BBC Future

    Aerial dance

    Most stunning images of the week

    Sochi by night and dancing jets Read more…

    Programmes

    • Presenter Tommy Sandu wears glasses fitted with video camerasThe Travel Show Watch

      The must-have travel gadgets for a trouble-free journey including video camera shades

  • Oceans to help power coastal homes

    M A I N   N E W S

    Oceans to help power coastal homes
    Vijay Mohan
    Tribune News Service

    Chandigarh, February 15
    Studies are underway to determine the feasibility of harnessing the movement of ocean water to generate electricity as part a government initiative to exploit renewable sources of energy.

    The use of ocean waves, currents and differential water temperature are among the relatively new fields in India that are being looked at for generating power in a bid to ensure energy security and move towards lower carbon emissions.

    The move towards harnessing energy from oceans assumes significance in view of India’s long coastline. Renewable sources, except hydroelectricity, account for just 12 per cent of India’s installed power generation.

    Interacting with The Tribune, Secretary, Ministry of Earth Sciences, Dr Shailesh Nayak today said small power generating units of up to 3MW could be set up to meet the power requirements of small settlements along the coast.

    The mechanical energy from the oscillation of the waves can be converted into electrical energy. He was here to deliver the inaugural address at the National Workshop on Renewable Energy Systems in Mountainous Regions, organised at the Snow and Avalanche Studies Establishment. Dr Nayak said another technology being explored was using the temperature differential between the surface of the ocean and at a depth of a few hundred metres.

    He said oceans absorbed heat and there was a temperature difference of 10-12 degrees between the surface and at the depth of 800 metres.

    Though experiments are being conducted in this field, engineering issues and availability of optimum equipment was a challenge.

    Ocean currents could also be tapped. The force of water is 800 times stronger than that of air and can be used to power turbines, though the major challenge was to identify suitable locations for getting the required force.

    Experiments are also underway to set up off-shore wind farms in Gujarat and Tamil Nadu, where the potential for using wind to power turbines is high.

  • Fresh Japan snow storm leaves three dead, 850 injured

    Fresh Japan snow storm leaves three dead, 850 injured

    Updated 10 hours 35 minutes ago

    A fresh snow storm in Japan has left three people dead and 850 injured amid further disruptions to the country’s road, rail and air travel services following last week’s deadly blizzard.

    Snow began falling on Friday morning in the capital Tokyo and piled up to 26 centimetres by early Saturday, a week after the heaviest snowfall in decades left at least 11 people dead and more than 1,200 injured across the nation.

    A driver was killed on Friday in a crash involving his car and a truck on an icy road in Shiga, central Japan, while a farmer died after a tractor overturned on a snow-covered road in south-western Oita, local media reported.

    In a separate snow-related accident, a driver was killed and three others injured on an expressway in central Shizuoka, the news reports said.

    Public broadcaster NHK said some 850 people, including one in a coma, have been injured in snow-related accidents across the nation since snow hit western Japan late Thursday.

    Drivers struggled to move their cars in the capital’s residential district of Setagaya, while snow started melting and flooding some roads in downtown Tokyo.

    Transport disruptions

    At least 628 flights, mostly on domestic routes, were cancelled on Saturday at Haneda and other airports in eastern Japan, NHK said, a day after more than 260 flights were grounded due to heavy snow.

    Television broadcast images of passengers resting on benches and floors under blankets at Haneda airport in Tokyo as public transport services were also suspended due to heavy snow.

    Two commuter trains collided at Motosumiyoshi station in Tokyo early Saturday leaving 19 passengers injured, officials said.

    The accident occurred as train services were disrupted due to the storm but it was not immediately clear if the collision was directly related to the bad weather. Transport authorities are investigating the case.

    The storm also caused delays and suspensions on the “shinkansen” bullet train services and the closure of a number of highways across the country.

    Some 187,000 households lost power mainly in eastern Japan due to snow and strong winds, NHK said.

    The meteorological agency has continued warning of heavy snow in eastern Japan, as well as strong winds and high waves along coastal areas, which may cause snowslides.

    Last week, as much as 27 centimetres of snow was recorded in Tokyo, the capital’s worst snowfall for 45 years.

    While much of that snow had melted, the remains of larger piles as well as some slightly diminished snowmen were still visible across the city.

    AFP

  • NSW’s population is growing, but some places more than others

    NSW’s population is growing, but some places more than others

    By Jo Chivers
    Friday, 14 February 2014

    If I told you that a regional NSW city – only a two hour drive from Sydney – has predicted population growth of 42% over the next 20 years, would you believe me?

    NSW Planning has released some interesting statistics. They say that the population of NSW will increase by two million people to reach 9.2 million by 2031.

    There is a special release of preliminary population projections for 2011-2031 which reveal that many of the states regions will grow – some faster than others.

    Some of you reading this will know that I’m a big fan of the Hunter Region of NSW. It’s where I’ve been developing property since 2001. I love the area and continue to study and research it. It’s a vibrant region with a diverse economy. Over time, I’ve narrowed down my focus for property developing to a few cities within the very large Hunter Region.  The areas we work in are very affordable, with good growth prospects.

    This week I thought I’d share a great research tool on the NSW Department of Planning’s website.

    The NSW Department of Planning and Infrastructure is the key source of population analysis and policy-orientated advice for the NSW government. It’s responsible for the development and regular review of NSW official population projections, incorporating information from its Metropolitan Development Program, the Australian Bureau of Statistics, Federal Department of Immigration and Citizenship and NSW Health. It also develops household and dwelling projections, which are informed by the future population size and age structure as indicated by the population projections.

    In a nutshell, they’ve worked out that NSW is growing.

    Their projections show that the state will grow by 100,000 people on average each year until 2031. They have regional growth plans in place for all parts of NSW to better cater for, and support, growth and population change in the regional areas.

    The measures being taken by the NSW government to encourage regional development include:

    • Identifying 1,500 more public sector jobs for relocation from metropolitan Sydney to regional areas by 2021, as part of the Decade of Decentralisation vision
    • Creating regional growth plans as part of our new planning system
    • Extending eligibility for the Regional Relocation Grant to long-term renters in metropolitan
    • Increasing NSW government funding to promote regional tourism, boost frontline services and support hospital upgrades in regional communities
    • Providing more than $160 million over four years to mining communities through the Resources for Regions program
    • Supporting new investment in regional NSW through the Regional Industries Investment Fund, which in 2011-12 helped generate more than 1,000 new jobs
    • Furthering efforts to attract people to regional NSW for work through a new $10,000 Skilled Regional Relocation Incentive
    • Extending the Jobs Action Plan, which offers a payroll tax rebate to businesses employing additional staff, to 30 June 2015
    • Allocating 30% of funding from the state’s infrastructure fund, Restart NSW, to regional communities

    Check out this link; you can click on any NSW region and it will give you the current population, predicted growth, the main drivers of the growth and a breakdown of the age changers. Let me know if you work out which city I’m referring to.

    If history is anything to go by, the Hunter lags the Sydney market. Last cycle, I watched as the Sydney market went crazy with demand, prices increased and investors were priced out. They started looking for more affordable areas to invest in. That triggered the last major growth spurt in the outskirts of Sydney. Indicators show that this time may be looming.

    If you combine purchasing and then adding value to property through development – as the market swings upwards – then you’ve hit the nail on the head and can create some good equity in your property.

    I’m not the only one touting the benefits of the Hunter Region and agree wholeheartedly with Bernard Salt, leading commentator and advisor on consumer, cultural and demographic trends:

    “The Hunter has it all: critical mass in population; a diverse economic base; first-class tertiary institutions; military representation; airport connectivity; local media production and broadcasting; as well as proximity to Sydney.”

    I couldn’t have said it better myself, thanks Bernard.

    Jo Chivers is director of Property Bloom, which manages property development.

  • Still out in the cold and we are all in this together

    1 of 38
    Why this ad?
    Security Course from $250www.skillnetaustralia.com.au – Full Licence Course 26/02 6pm-10pm. 2 Day Upgrade Course 25/02-26/02

    Still out in the cold and we are all in this together

    Inbox
    x

    Linda Samera via CommunityRun ljrsamera@gmail.com via sendgrid.info

    8:25 AM (2 hours ago)

    to me

    Dear Friends,

    Thank you very much for your support in signing the petition “Don’t leave country patients out in the cold”.

    This week I received an answer from the Health Minister Jillian Skinner to a letter I wrote before I created the petition. The Health Minister’s response did not offer any solutions to my situation or to the bigger problem of accommodation for country patients across the whole of NSW. This is not good enough. I have written back to the Health Minister and my local MP regarding both my own situation and the situation that many of you find yourselves or your family and friends in. We need to make it clear to the Health Minister that the need is immediate, that it involves all tertiary hospitals in NSW and that we need action taken on this issue now.

    Here’s how you can help – could you please email the office of the Health Minister Jillian Skinner at

    office@skinner.minister.nsw.gov.au

    Or can you please call the Health Minister Jillian Skinner on

    (02) 9909 2594 (North Shore Office) or (02) 9228 5229

    The Health Minister needs to hear our stories and those of people close to us. She needs to hear that country patients demand accommodation at all tertiary hospitals that is affordable and accessible to everyone. She also needs to hear that people in the city are not happy about this unfair situation. Let’s make our voices heard loud and clear.

    Thanks again for your support and please remember to spread the news about this petition by clicking the link www.communityrun.org/p/nowheretostay.

    Linda Samera

     

  • Sir Ian Cheshire: London at risk of catastrophic flooding

    Sir Ian Cheshire: London at risk of catastrophic flooding

    Kingfisher boss calls on the government to create a national flood plan and stop using floods as a ‘political football’
    Thames barrier

    The Thames barrier. Ian Cheshire warns that London is at risk of catcastrophic flooding unless long term planning is prioritisied. Photograph: Andy Hall

    The centre of London is at risk from catastrophic flooding that would make Hurricane Sandy’s impact on New York pale in comparison, one of the UK’s most senior businessmen has warned.

    Sir Ian Cheshire, chief executive of multinational DIY company Kingfisher, which owns B&Q, has called for the creation of a national flood plan and said that responsibilities for water management are currently scattered among too many departments at national and local government level.

    Cheshire, who led a government taskforce last year on the role of ecosystems, said the UK has to concentrate on adaptation and those still in denial about global warming should wake up and recognise “these events are connected to the fact that climate is fundamentally changing”.

    After studying the data last year, Cheshire said he was shocked that the risk to London from a storm surge or a breaching of the Thames Barrier was so little recognised and warned there was a threat of “disaster of epic proportions” in the capital. “If the Thames barrier is breached or fails for some reason, then the topography of London creates a massive problem because a lot of it is low-lying in the centre. If you combine that with the opportunity for water to get in the underground, as it did in New York, you’ve got a huge swath of central London being knocked out.”

    The worrying fact is the Thames barrier is recording increasingly higher rates of surge and has been closed more frequently, Cheshire added. While he believes it’s still a “manageable risk”, people need to start thinking about the problem “much more radically”.

    “This is sort of sci-fi disaster movie territory … It would be foolish to say there’s a 50% probability this will happen in the next two years but I think when you start seeing 300-year events coming up more frequently, we start to worry about the level of adaptation that we’ve already got.”

    Cheshire believes the UK lacks a systemic understanding of how to prevent and manage flooding and pointed to three areas requiring long-term action. The first is to think about whole water catchment areas instead of worrying about where the water ends up. This involves looking upstream to get to grips with the issues such as adapting farming techniques and other soft flood defences.

    This means a whole slew of initiatives “rather than just trying to build a bit of concrete at the end to stop water coming in” Cheshire said. He identified the lack of one body with the remit to tackle such initiatives as a major problem. He identified the lack of one body with the remit to tackle such initiatives as a major problem and asked whether water catchment management authorities can be set up with that explicit responsibility to also bring together all parties.

    “You can’t just assume this is going to go away. And I think that’s the big message as a sort of wake-up call to say, this requires a national level of effort.”

    In a sideways swipe at the political squabbling that has come in the wake of the floods, Cheshire said the government needed to plan for the long term, rather than flood defences becoming a “political football that can be used around budget time. It needs to have a five- to 10-year view of how to manage the problem as opposed to ‘we need to put some concrete in here quickly’ or ‘dredge this particular river’.”

    A second major area that needs to be addressed, according to Cheshire, is Britain’s cities have become less resilient to flooding as a result of increased building density and the concreting of gardens, which means water is unable to soak away.

    The third area of action is for individuals to start protecting their properties more effectively, through simple measures including the building of walls and ditches.

    Kingfisher has itself been affected by the recent deluge with its Aberystwyth store put out of action twice by flooding and many more of its stores being affected in Poland. Cheshire called for businesses to wake up and respond, including understanding what their potential exposure is, given that many still don’t consider flooding to be a risk. He also said there needed to be a fundamental change in the mindset of companies to recognise how they take our environment for granted.

    “Most businesses don’t think themselves as having any relationship with the ecosystem, that it’s something very abstract, far away,” he said. “They believe you get water, air and all these other things for free so it doesn’t really matter. So I think making the shift in mindset is important so people understand that they have that dependency and work out where they’re dependent. That is a very big awareness raising exercise.”

    Cheshire called on companies to start speaking to their customers about the issue, because there was a risk that once better weather comes, the issue of flooding will fade from people’s minds.

    “After these floods, it would be a tragedy if we get into the summer and everyone’s forgotten about it, and then we wake up again this time next year and we’ve done nothing with it,” he said.

    Join the community of sustainability professionals and experts. Become a GSB member to get more stories like this direct to your inbox