Lamont-Doherty Earth Observatory

@lamont.columbia.edu

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Building fundamental knowledge about the origin, evolution, and future of our planet since 1949 (lamont.columbia.edu).

Photo from the National Weather Service office on July 15 in Upton, New York, with the sky obscured by a thick layer of smoke. Credit: NWS Forecast Office New York, NY via Wikimedia Commons
Marie Tharp with the iconic Heezen-Tharp World Ocean Floor map, a landmark in cartography. Credit: Lamont-Doherty Earth Observatory and the estate of Marie Tharp
Surface velocity measurements of a section of the fissure 8 lava flow using drone video taken on June 22, 2018. The colors represent the different flow velocities at different parts of the flow. Credit: Einat Lev
Instructions for taking photos and submitting the through the MyCoast app to contribute to Help Sea Grant NY, Lamont-Doherty Earth Observatory, and Columbia Engineering build an AI system that cleans up litter in New York’s rivers, lakes, and sea.
Drone image of Sermeq Kujalleq in the Kangia icefjord, one of West Greenland’s active glaciers with a massive calving response. Credit: Andrea Kneib-Walter, University of Zürich and Guillaume Jouvet, University of Lausanne
Space Flag CCL by Selva Ozelli features rows and columns of blue stars, silver stars, and orange suns in the shape of a flag
Cody Bahlau in the Langseth control room livestreaming to a first-grade class in Adrian, Michigan for the Desk to Deck program. Credit: Cody Bahlau
A blurry, yellowed view of cars on a highway, during a sandstorm in Giza, Egypt. Credit: Tamer Soliman
Mount Etna volcano in Sicily, Italy. Courtesy: Esteban Gazel
A visit from 1News New Zealand during the SWAIS2C core description workshop. Credit: Kelly Fenton-Samuels
A sensor called a point dendrometer attached to a tree used to estimate tree hydration status and growth. Credit: Mukund Rao
HISEAS field team on Mangaia, Cook Islands.
Aerial View of the Lamont-Doherty Earth Observatory campus in Palisades, NY. Credit: Nick Frearson
Geologist Folarin Kolawole holding a rock with text 2026 Wayfinder Award Recipient.
Sunrise from the galley of the R/V Marcus G. Langseth off the coast of the Carolinas heading south to Puerto Rico. Credit: Christina DeLorenzi
Lamont's R/V Marcus G. Langseth in the moonlight during the Queen Charlotte Fault Expedition, August 2021, Haida Gwaii. Credit: Cody Bahlau
Rockland Audubon Society visitors on LDEO campus.
Educators and participants scan the net for species at World Fish Migration Day. Credit: Hudson River Field Station
A drill tent at the Allan Hills Blue Ice Area in East Antarctica. Credit: Austin Carter
Clouds at sunrise over the Atlantic Ocean near Barbados during the ATOMIC field experiment. Credit: Robert Pincus
Excellence in Scientific Mentoring awardee Dorothy Peteet with LDEO interim director Steve Goldstein.
Aerial view of remaining glacial ice on Puncak Jaya, Papua. Credit: BMKG
Wiley Top Viewed Article Certificate for Marco Tedesco for The Effect of Physically Based Ice Radiative Processes on Greenland Ice Sheet Albedo and Surface Mass Balance in E3SM published in Journal of Geophysical Research: Atmospheres
Lamonters and their bikes with the George Washington Bridge in the background on May 11, 2026 Bike-to-Work Day.
View of Earth taken during ISS Expedition 66. Credit: Earth Science and Remote Sensing Unit, NASA
Google Earth map of the Langseth's arrival at Majuro in the Marshall Islands.
Aerial photo of the highest runup resulting from the August 10, 2025 landslide-triggered tsunami in Tracy Arm, taken during a U.S. Geological Survey field reconnaissance flight on August 13, 2025. View direction is approximately south. Credit: John Lyons/U.S. Geological Survey
Late Miocene fossil-bearing strata of Lothagam in West Turkana. Credit: Christian Rowan
Maureen Raymo with an ocean sediment core in the LDEO Core Repository. Raymo’s work has shaped our understanding of how the ice ages fluctuate and how sea levels change. Credit: Lamont-Doherty Earth Observatory
Mike Kaplan sampling a boulder in the Lago Argentino area of Patagonia. Credit: Scott Travis
Laramie Jensen
Marie Tharp with her elbow on a map. Credit: Lamont-Doherty Earth Observatory and the Estate of Marie Tharp
Kerstin Lehnert (center) and colleagues in a lunar sample vault at the Johnson Space Center. Photo courtesy Kerstin Lehnert
Sunrise over Hayli Gubbi volcano in the Afar region of Ethiopia, taken January 31, 2026. Credit: Amdemichael Zafu Tadesse, Lamont-Doherty Earth Observatory
Homo erectus crania from the Turkana Rift. Left: WT 15000, ‘Turkana Boy’ from West Turkana. Right: ER 3733 from East Turkana. Credit: John Rowan
Sunset over the Hudson River from the Lamont shuttle. Credit: Andrew Marshall Fagerheim, Lamont-Doherty Earth Observatory
In Montauk, a white oak tree that the research team cored for the study. Credit: Nicole Davi
Sulfur vents on the seafloor and Christine McCarthy in frame from Make ‘N Break Ice video
Evidence of spring 2025 at Comer Building, Lamont-Doherty Earth Observatory. Credit: Kelly Fenton-Samuels, Lamont-Doherty Earth Observatory
Michael Kaplan
BLOOFINZ research cruise on board the Roger Revelle in the Argo Abyssal Plain downstream of the Indonesian Throughflow. Credit: Joaquim Goes, Lamont-Doherty Earth Observatory
Cross-section of a tree used to analyze past climate with title Analyzing Tree Cores, and the question, What might a narrow ring suggest about climate patterns?
Illustration of a fish titled "What defines a fish?" with labeled parts: Water, Gills, Scales, Fins, Tails, Eggs.
Rock, ice, and sky in Greenland. "Greenland is more than geopolitics: it is the epicenter of climate change, it is an ancient place holding the secrets of our planet, our memories." Credit: Marco Tedesco, Lamont-Doherty Earth Observatory
Wildflowers cascade down the cliffs of the Gaspé Peninsula, Canada, August 2024. Credit: Miriam Cinquegrana, Lamont-Doherty Earth Observatory
Spatio-temporal classification and attribution of subsidence hot spots across Java Island. Credit: Leonard O. Ohenhen et al., Land subsidence on Java Island and its contributions to relative sea level change. Sci. Adv. 12, eaec0172(2026). DOI: 10.1126/sciadv.aec0172
Colorful icons representing nature, sustainable living, and renewable energy with text Earth Day April 22, 2026
The hydroxyl radical (OH) response to climate warming takes place through changes in meteorology and temperature-sensitive emissions. OH is influenced by meteorological parameters as well as by chemical factors, with the latter determined by anthropogenic and natural emissions. Climate warming impacts meteorology and emissions, leading to changes in OH chemistry. Credit: Zhu, Q., Neumann, N., Fiore, A. M., Pincus, R., Guan, J., Milly, G., et al. (2026). Uncertain natural emissions dampen the increase in tropospheric hydroxyl radical (OH) with idealized surface warming. Journal of Advances in Modeling Earth Systems, 18, e2025MS005248. https://doi.org/10.1029/2025MS005248
R/V Marcus G. Langseth's sail lines in the water behind the ship to tow and collect seismic data. Credit: Cody Bahlau
Google Earth image of R/V Marcus G. Langseth mapping the seafloor. Credit: Cody Bahlau
Students descending into Cole's Cave. Credit: Ally Peccia
LDEO tree ring scientists Cari Leland and Mukund Rao with old timber beams at a demolition site in New York City. Credit: Milagros Rodriguez-Caton
Cultures of marine nitrogen-fixing cyanobacteria in a light and temperature controlled incubator in the Dyhrman lab at Lamont-Doherty Earth Observatory. Credit: Hanna Anderson
Women's History Month events. The first event, on Wednesday, March 18 from 2:30 to 4:00 PM, is a film screening of "Still Working 9 to 5" at Monell Auditorium. The second event, on Monday, March 23 from 12:30 to 1:30 PM, is a panel discussion, "Leading the Change: Women in Climate Science" in-person and livestream.
The Great Unconformity in the Grand Canyon separates ~1.75 billion year-old Vishnu Schist from ~505 million year-old (Cambrian) Tapeats Sandstone. Credit: Nicholas Christie-Blick
Waves off the Atlantic Ocean slowly take fossilized carbonate dunes back to sea in Middle Caicos. Credit: Billy D'Andrea