State of the Planet

News from the Columbia Climate School

Climate239

  • Ancient Dry Spells, Future Risk?

    Ancient Dry Spells, Future Risk?

    The last major drought to hit the northeastern U.S. lasted three years and shrunk New York City’s reservoirs by nearly three quarters. But as bad as that drought was, the region has seen at least three dry spells in the last 6,000 years that were far worse, says Dorothy Peteet, a climate scientist at Columbia…

  • The Art and Science of Speed Dating

    The Art and Science of Speed Dating

    Speed dating can help singles looking for love. Can it help bring artists and scientists closer together, too?

  • Under the Dead Sea, Warnings on Climate and Earthquakes

    Under the Dead Sea, Warnings on Climate and Earthquakes

          An international team of scientists drilling deep under the bed of the Dead Sea has found evidence that the sea may have dried up during a past warm period analogous to scenarios for climate change in coming decades. With nations in the volatile region already running short on water, the finding could be a…

  • Climate Services event at COP-17

    Climate Services event at COP-17

    A side event hosted by the IRI at this year’s U.N. climate conference will discuss a new Climate Services Partnership.

  • Farmers, Flames and Climate: Are We Entering an Age of ‘Mega-Fires’?

    Farmers, Flames and Climate: Are We Entering an Age of ‘Mega-Fires’?

    For millennia, people have set fires to clear land for cultivation, pastures or hunting; so-called slash-and-burn agriculture is still common across much of tropical Africa, Asia and South America. It has been a useful strategy–but …

  • New York State May Soon Suffer Outsize Effects from Climate, Says Report

    From Farms to Subways, Many Sectors Could Be Affected

  • PhD. Ode to a Tree

    PhD. Ode to a Tree

    “I was deeply saddened by the loss of one of our most beautiful trees on campus during the last storm. It had perfect symmetry and such a beautiful color display late in the fall,” wrote geochemist Martin Stute, after a highly unusual heavy October snow felled a 22-year-old Bradford pear at Lamont-Doherty Earth Observatory, where he…

  • Winter Extremes: So Last Year?

    Winter Extremes: So Last Year?

    What are the odds that this winter will be as snowy as the last two? Climate scientist Jason Smerdon and tree-ring scientist Rosanne D’Arrigo are working on an answer, looking at the long-term history of two important weather patterns—the North Atlantic Oscillation and La Niña state in the tropical Pacific—that similar to last year could…

  • Trees on Tundra’s Border Are Growing Faster in a Hotter Climate

    Measuring Techniques Improve—But Implications Are Not Certain

Colorful icons representing nature, sustainable living, and renewable energy with text "Earth Day 2026"

The first Earth Day in 1970 ignited a movement to stop polluting our planet. Today, our scientists and experts are tackling the most pressing challenges to achieve real-world impact. This Earth Day, join us in our commitment to realizing a just and sustainable future for our planet. Visit our Earth Day website for ideas, resources, and inspiration.

  • Ancient Dry Spells, Future Risk?

    Ancient Dry Spells, Future Risk?

    The last major drought to hit the northeastern U.S. lasted three years and shrunk New York City’s reservoirs by nearly three quarters. But as bad as that drought was, the region has seen at least three dry spells in the last 6,000 years that were far worse, says Dorothy Peteet, a climate scientist at Columbia…

  • The Art and Science of Speed Dating

    The Art and Science of Speed Dating

    Speed dating can help singles looking for love. Can it help bring artists and scientists closer together, too?

  • Under the Dead Sea, Warnings on Climate and Earthquakes

    Under the Dead Sea, Warnings on Climate and Earthquakes

          An international team of scientists drilling deep under the bed of the Dead Sea has found evidence that the sea may have dried up during a past warm period analogous to scenarios for climate change in coming decades. With nations in the volatile region already running short on water, the finding could be a…

  • Climate Services event at COP-17

    Climate Services event at COP-17

    A side event hosted by the IRI at this year’s U.N. climate conference will discuss a new Climate Services Partnership.

  • Farmers, Flames and Climate: Are We Entering an Age of ‘Mega-Fires’?

    Farmers, Flames and Climate: Are We Entering an Age of ‘Mega-Fires’?

    For millennia, people have set fires to clear land for cultivation, pastures or hunting; so-called slash-and-burn agriculture is still common across much of tropical Africa, Asia and South America. It has been a useful strategy–but …

  • New York State May Soon Suffer Outsize Effects from Climate, Says Report

    From Farms to Subways, Many Sectors Could Be Affected

  • PhD. Ode to a Tree

    PhD. Ode to a Tree

    “I was deeply saddened by the loss of one of our most beautiful trees on campus during the last storm. It had perfect symmetry and such a beautiful color display late in the fall,” wrote geochemist Martin Stute, after a highly unusual heavy October snow felled a 22-year-old Bradford pear at Lamont-Doherty Earth Observatory, where he…

  • Winter Extremes: So Last Year?

    Winter Extremes: So Last Year?

    What are the odds that this winter will be as snowy as the last two? Climate scientist Jason Smerdon and tree-ring scientist Rosanne D’Arrigo are working on an answer, looking at the long-term history of two important weather patterns—the North Atlantic Oscillation and La Niña state in the tropical Pacific—that similar to last year could…

  • Trees on Tundra’s Border Are Growing Faster in a Hotter Climate

    Measuring Techniques Improve—But Implications Are Not Certain