State of the Planet

News from the Columbia Climate School

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Science for the Planet: Why Marshes Must Be Preserved

While collecting sediment cores from a New York City coastal marsh, Dorothy Peteet, a botanist and climatologist at the Climate School’s Lamont-Doherty Earth Observatory, explains how such ecosystems store massive amounts of carbon, but are under threat from sea-level rise.

“We’re building a chronology to understand the carbon storage, the human impact…the local history and tying it to our record,” says Peteet. “Then we’re putting that carbon story into a bigger picture of New York City marshes, the whole East Coast sea level rise and trying to fill in the puzzle.”

This is the first video of Science for the Planet, a short explainer series about how Columbia Climate School scientists and scholars are trying to understand the effects of climate change and help solve the crisis.

Learn more about Peteet’s work:

She’s on a Mission to Plumb the Secrets of New York’s Disappearing Wetlands

Photo of the Earth from space with the text "Lamont at AGU25" on top.

AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More

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