Upload
85,485

The Economist

  • How volcanoes change the climate

    21,021 views 1 month ago
    Two hundred years ago, Tambora, a volcano in Indonesia, blew its top in the most violent eruption in recent history. Damage from the volcano and an associated tsunami was immense; perhaps 100,000 people died immediately, or starved in the aftermath. The effects on the wider world, though, were even greater. Like all large eruptions, Tambora’s was to change the climate around much of the planet for years.

    But just how do volcanoes change the climate?

    Eruptions spew out not just lava and ash, but also gases—indeed it is these gases, trapped under great pressure in molten rock, that give an eruption its explosive power. For the climate, the key gas is sulphur dioxide. Once it gets into the stratosphere, sulphur dioxide from a volcano mingles with water, forming tiny sulphate particles.

    These particles reflect some sunlight back into space, and the surface below cools. They also absorb some sunlight, warming up the stratosphere. These temperature changes have big knock-on effects. A cooler surface means less evaporation, and thus less rainfall. A warmer stratosphere means stronger jet streams. In the year after Tambora’s eruption, scientists estimate the stratosphere's sulphate veil caused a three percent drop in rainfall and cooled the planet by one degree Celsius. That is a temperature drop in one year twice as large as the long-term warming the Earth has seen over the past half-century. The climate upheaval caused a hiatus of the Indian monsoon, drought in southern Africa and widespread crop failures in Europe, where it was known as the year without a summer.

    No one can say when an eruption large enough to have such drastic effects will happen next. That one will happen, though, is a certainty. Show less
    Read more
  • The Economist explains Play

    • How to stop invasive underwater species - Duration: 2 minutes, 1 second.

      • 5 days ago
      • 2,809 views
      When creatures from the Red Sea stray into Mediterranean waters, the results can be lethal. Red-Sea pufferfish colonising the eastern Mediterranean are so poisonous they kill about one in ten peopl...
    • Why China's agricultural system is inefficient - Duration: 2 minutes, 38 seconds.

      • 1 week ago
      • 6,924 views
      Since a largely man-made famine that started in the late 1950s, in which tens of millions died, China has defied the odds by feeding its people almost entirely on its own. It has provided for one-f...
    • The benefits of paternity leave - Duration: 2 minutes, 23 seconds.

      • 2 weeks ago
      • 4,171 views
      Despite decades of social progress in the workplace, women still have to contend with the lion’s share of child-care. While most countries allow up to three months of maternity leave, only around h...
    • How Russians see the West - Duration: 2 minutes, 42 seconds.

      • 3 weeks ago
      • 17,488 views
      On May 9th Russia will mark the 70th anniversary of the end of the second world war, known to Russians as the Great Patriotic War. It ought to be a moment for joint commemoration between Russia and...
    • How to make a building quake-proof - Duration: 2 minutes, 51 seconds.

      • 1 month ago
      • 6,497 views
      More than a million people have died in earthquakes in the last two decades. Seismic rumbling between the Earth’s tectonic plates puts some of the world’s most densely-populated countries at partic...
    • Why China and India face a marriage crisis - Duration: 2 minutes, 51 seconds.

      • 1 month ago
      • 33,714 views
      China and India - home to a third of humanity – both face a marriage crisis that will last for generations. A mere five years ago marriage patterns were normal in the two countries.

      Now in China ...
    • How space flight affects the human body - Duration: 2 minutes, 26 seconds.

      • 1 month ago
      • 5,204 views
      Mice, dogs and monkeys all became astronauts before humans did. On April 12th 1961, Russian cosmonaut Yuri Gagarin became the first man in space, when little was known about the effects spaceflight...
    • How volcanoes change the climate - Duration: 113 seconds.

      • 1 month ago
      • 21,021 views
      Two hundred years ago, Tambora, a volcano in Indonesia, blew its top in the most violent eruption in recent history. Damage from the volcano and an associated tsunami was immense; perhaps 100,000 p...
    • Why golf is declining in America - Duration: 2 minutes, 44 seconds.

      • 2 months ago
      • 17,319 views
      Golf traces its origins to 15th century Scotland but it was in America starting in the 1890s that it really came into its own. The country is by far the world’s biggest market for golf, home to abo...
    • Why Singapore became an economic success - Duration: 2 minutes, 13 seconds.

      • 2 months ago
      • 25,803 views
      When it started life as an independent, separate country in 1965, Singapore’s prospects did not look good. Tiny and underdeveloped, it had no natural resources and a population of relatively recen...
    • How to stop the next epidemic - Duration: 2 minutes, 30 seconds.

      • 2 months ago
      • 6,186 views
      It has been one year since the Ebola outbreak in West Africa was recognised. The virus is blood-borne; the world’s next big disease could be airborne, which would be much harder to contain – partic...
    • How animals change colour - Duration: 2 minutes, 3 seconds.

      • 2 months ago
      • 8,853 views
      Chameleons' colour-changing ways are well-known, but precisely how they do it has remained a mystery until this week. They are far from the only animals with the skill: often deployed for camouflag...
    This item has been hidden
  • Short docs Play

    This item has been hidden
  • Recent activities Play

    • How to stop invasive underwater species - Duration: 2 minutes, 1 second.

      • 5 days ago
      • 2,809 views
      When creatures from the Red Sea stray into Mediterranean waters, the results can be lethal. Red-Sea pufferfish colonising the eastern Mediterranean are so poisonous they kill about one in ten peopl...
    • The weaker sex - Duration: 6 minutes, 45 seconds.

      • 5 days ago
      • 5,478 views
      Poorly educated men in rich countries have had difficulty coping with the enormous changes in the labour market and the home over the past half-century. In Tallulah, a decaying railroad town in Lo...
    • The week ahead: May 24th 2015 - Duration: 10 minutes.

      • 1 week ago
      • 1,625 views
      Muhammadu Buhari takes power in Nigeria, Rick Santorum is expected to announce his presidential candidacy and David Cameron discusses a European referendum
    • Why China's agricultural system is inefficient - Duration: 2 minutes, 38 seconds.

      • 1 week ago
      • 6,924 views
      Since a largely man-made famine that started in the late 1950s, in which tens of millions died, China has defied the odds by feeding its people almost entirely on its own. It has provided for one-f...
    • Special report: Modi's many tasks - Duration: 8 minutes, 1 second.

      • 1 week ago
      • 2,271 views
      Narendra Modi has grand ambitions for his country, and self-confidence to match. But he has yet to show how he will deliver, says Adam Roberts
    • The week ahead: Unpredictable - Duration: 14 minutes.

      • 2 weeks ago
      • 2,340 views
      Britain’s new government, the UN Security Council’s debate on Yemen, and the Eurovision Song Contest
    • The view from Islamabad | A long and treacherous road - Duration: 4 minutes, 42 seconds.

      • 2 weeks ago
      • 1,985 views
      Pakistan has aspirations to be a power player in Asia and beyond but is beset by domestic and international conflicts. Tackling terrorism and negotiating with regional partners shows progress but t...
    • The benefits of paternity leave - Duration: 2 minutes, 23 seconds.

      • 2 weeks ago
      • 4,171 views
      Despite decades of social progress in the workplace, women still have to contend with the lion’s share of child-care. While most countries allow up to three months of maternity leave, only around h...
    • Adair Turner on debt - Duration: 8 minutes, 8 seconds.

      • 2 weeks ago
      • 1,433 views
      The former chairman of Britain's Financial Services Authority and author of the forthcoming book "Between Debt and the Devil" explains why private debt, not banks, deepened the financial crisis and...
    • The week ahead: Amount owing - Duration: 12 minutes.

      • 3 weeks ago
      • 2,775 views
      Greece’s IMF bill, Barack Obama’s meeting with Arab leaders and the European Commission’s new plan for migration
    • Live Google Hangout: The Blue Economy - Duration: 34 minutes.

      • 3 weeks ago
      • 1,108 views
      Kathryn Sullivan, US under-secretary of commerce for oceans and atmosphere and administrator of the National Oceanic and Atmospheric Administration will take part in a live Hangout with the editori...
    • How Russians see the West - Duration: 2 minutes, 42 seconds.

      • 3 weeks ago
      • 17,488 views
      On May 9th Russia will mark the 70th anniversary of the end of the second world war, known to Russians as the Great Patriotic War. It ought to be a moment for joint commemoration between Russia and...
    This item has been hidden
  • Videographics Play

    Our Videographics and Live Charts offer food for thought on topics from military spending to millennials to football
    This item has been hidden
  • The Economist interviews Play

    • Bill Gates debunks three myths - Duration: 7 minutes, 5 seconds.

      • 1 year ago
      • 5,863 views
      Bill Gates on why aid works, the poor are getting richer and growing wealth inequality doesn't matter. For more video content from The Economist visit our website: http://econ.st/LduNq3
    • Francis Fukuyama on "Political Order and Political Decay" - Duration: 6 minutes, 58 seconds.

      • 7 months ago
      • 4,730 views
      The political scientist explains how the West has developed strong states while the Middle East and Africa continue to struggle. For more multimedia content from The Economist visit our website: ht...
    • Steven Pinker on bad and good writing - Duration: 5 minutes, 55 seconds.

      • 7 months ago
      • 11,657 views
      The psychologist and word-usage expert has produced a new style guide with cognitive sensibilities called "The Sense of Style". For more multimedia content from The Economist visit our website: htt...
    • Barack Obama talks to The Economist - Duration: 41 minutes.

      • 10 months ago
      • 31,540 views
      An interview with the president. The Economist's editor-in-chief and foreign editor talked to Barack Obama aboard Air Force One on August 1st, 2014 as he returned to Washington from Kansas City. Th...
    • Thomas Piketty on the history of money - Duration: 9 minutes, 31 seconds.

      • 10 months ago
      • 13,691 views
      The economist explains how wealth and income inequality have evolved over the past century, and why making access to education more meritocratic could help tackle both problems.
      For more video con...
    • René Burri on photography - Duration: 6 minutes, 31 seconds.

      • 7 months ago
      • 1,102 views
      In an interview from 2012, the internationally acclaimed photographer discusses his career and some of his most iconic work. For more multimedia content from The Economist visit our website: http:/...
    • Nigel Farage on UKIP's rise: A state of mind - Duration: 9 minutes, 46 seconds.

      • 1 year ago
      • 20,533 views
      Nigel Farage, leader of the UK Independence Party, reflects on recent successes and outlines his strategy for upcoming European and general elections
    • Gutenberg's apprentice: More than one Great Man - Duration: 6 minutes, 11 seconds.

      • 6 months ago
      • 1,685 views
      Alix Christie's debut novel puts a human face on the invention of the printing press and brings to the fore a little known third actor in the creation of Johannes Gutenberg's world-changing Bible
    • Atul Gawande on end-of-life care - Duration: 7 minutes, 10 seconds.

      • 6 months ago
      • 2,777 views
      Facing mortality

      The leading surgeon and author discusses how doctors in rich countries handle end-of-life care, and why we must not shy away from the question of our own mortality. For more multi...
    • Northern Ireland's role in Britain's election - Duration: 7 minutes, 46 seconds.

      • 1 month ago
      • 1,663 views
      Northern Ireland's Democratic Unionist Party could be a kingmaker. In an interview, Peter Robinson, its leader, says his party would support either big party- provided the SNP is not calling the shots
    • In the pub with Nigel Farage - Duration: 10 minutes.

      • 1 month ago
      • 2,020 views
      The leader of the UK Independence Party discusses patriotism, immigration and mischief-making over a pint with our political editor
    • In the pub with Nigel Farage - Duration: 10 minutes.

      • 1 month ago
      • 8,908 views
      The leader of the UK Independence Party discusses patriotism, immigration and mischief-making over a pint with our political editor
    This item has been hidden
  • The World in 2015 Play

    This item has been hidden
  • Popular uploads Play

    This item has been hidden
to add this to Watch Later

Add to

Loading playlists...