solar panels Bloomberg/Getty Images

Menuju Planet yang Lebih Reflektif

CAMBRIDGETiga juta tahun yang lalu adalah saat terakhir kandungan karbon dioksida di atmosfer sama banyaknya dengan kandungan yang ada sekarang – pada saat itu, permukaan laut 10-30 meter lebih tinggi daripada ketinggian saat ini. Model iklim sejak dulu kesulitan untuk meniru perubahan fluktuasi permukaan laut yang besar tersebut – kesulitan tersebut baru saja teratasi belum lama ini. Model es Antartika dan iklim yang berkualitas tinggi, untuk pertama kalinya mampu memperagakan perubahan besar yang terjadi. Hal ini merupakan buah dari kemajuan ilmu pengetahuan. Namun, hasil dari simulasi tersebut memberikan kabar buruk.

Model yang baru tersebut menunjukan bahwa melelehnya Antartika dapat meningkatkan permukaan laut global sebanyak satu meter (3.2 kaki) pada akhir abad ini – artinya jauh di atas perkiraan sebelumnya. Lebih parah lagi, artinya ketika permukaan laut meningkat lebih dari lima meter maka keberhasilan pengurangan emisi dalam jumlah yang besar tetap tidak dapat menyelamatkan Lapisan Es Antartika Barat. Meningkatnya permukaan laut sebesar satu meter akan menempatkan seluruh kota dari Miami hingga Mumbai dalam kondisi berisiko dan dapat menyebabkan gangguan ekonomi yang besar.

Diperlukan penurunan suhu udara dengan cepat. Hingga saat ini, modifikasi albedo – semacam geoengineering dimaksudkan untuk membantu pendinginan planet dengan meningkatkan reflektivitas atmosfer bumi – terlihat sangat menjanjikan.

To continue reading, please log in or enter your email address.

Registration is quick and easy and requires only your email address. If you already have an account with us, please log in. Or subscribe now for unlimited access.

required

Log in

http://prosyn.org/DK2QPOH/id;
  1. Patrick Kovarik/Getty Images

    The Summit of Climate Hopes

    Presidents, prime ministers, and policymakers gather in Paris today for the One Planet Summit. But with no senior US representative attending, is the 2015 Paris climate agreement still viable?

  2. Trump greets his supporters The Washington Post/Getty Images

    Populist Plutocracy and the Future of America

    • In the first year of his presidency, Donald Trump has consistently sold out the blue-collar, socially conservative whites who brought him to power, while pursuing policies to enrich his fellow plutocrats. 

    • Sooner or later, Trump's core supporters will wake up to this fact, so it is worth asking how far he might go to keep them on his side.
  3. Agents are bidding on at the auction of Leonardo da Vinci's 'Salvator Mundi' Eduardo Munoz Alvarez/Getty Images

    The Man Who Didn’t Save the World

    A Saudi prince has been revealed to be the buyer of Leonardo da Vinci's "Salvator Mundi," for which he spent $450.3 million. Had he given the money to the poor, as the subject of the painting instructed another rich man, he could have restored eyesight to nine million people, or enabled 13 million families to grow 50% more food.

  4.  An inside view of the 'AknRobotics' Anadolu Agency/Getty Images

    Two Myths About Automation

    While many people believe that technological progress and job destruction are accelerating dramatically, there is no evidence of either trend. In reality, total factor productivity, the best summary measure of the pace of technical change, has been stagnating since 2005 in the US and across the advanced-country world.

  5. A student shows a combo pictures of three dictators, Austrian born Hitler, Castro and Stalin with Viktor Orban Attila Kisbenedek/Getty Images

    The Hungarian Government’s Failed Campaign of Lies

    The Hungarian government has released the results of its "national consultation" on what it calls the "Soros Plan" to flood the country with Muslim migrants and refugees. But no such plan exists, only a taxpayer-funded propaganda campaign to help a corrupt administration deflect attention from its failure to fulfill Hungarians’ aspirations.

  6. Project Syndicate

    DEBATE: Should the Eurozone Impose Fiscal Union?

    French President Emmanuel Macron wants European leaders to appoint a eurozone finance minister as a way to ensure the single currency's long-term viability. But would it work, and, more fundamentally, is it necessary?

  7. The Year Ahead 2018

    The world’s leading thinkers and policymakers examine what’s come apart in the past year, and anticipate what will define the year ahead.

    Order now