Keiji Horikawa

Relatively warm deep-water formation persisted in the Last Glacial Maximum - Nature During the Last Glacial Maximum, the deep Northwest Atlantic was only about 2 °C colder than today, suggesting sustained production of relatively warm North Atlantic Deep Water during the Last Glacial Maximum.

Nature research paper: Relatively warm deep-water formation persisted in the Last Glacial Maximum

go.nature.com/4a46ubf

26.01.2026 13:33 — 👍 12    🔁 2    💬 0    📌 1

Core2Core Symposium: "IODP Legacy Cores" as archives of warm periods in the geological past - REGISTER here: climatelegacy.uni-graz.at/en/symposium/

21.01.2026 10:02 — 👍 3    🔁 2    💬 0    📌 0

We’ve wrapped up drilling at Crary Ice Rise with 228m of sediment core. This is an unprecedented record of the history of the West Antarctic Ice Sheet stretching back millions of years. Initial observations indicate the core includes periods of environmental change during past times of warming.

09.01.2026 07:48 — 👍 52    🔁 18    💬 0    📌 1

U-Pb calcite age dating of fossil eggshell as an accurate deep time geochronometer - Communications Earth & Environment Biogenic carbonate of eggshells can be used as a new geochronometer through direct calcite U-Pb dating, producing high accurate ages, as revealed by two tests on dinosaur eggs from North America and M...

www.nature.com/articles/s43...
An novel dating method

07.01.2026 07:55 — 👍 1    🔁 1    💬 0    📌 0

We’ve hit a century! 100m of core! Our night-shift crew took us past this milestone – we’re now more than halfway towards our target. Reaching this point is testimony to the skill and hard work of our drillers, who are clocking up long runs and cores of up to 3.1m 👉https://bit.ly/4aHvt5e

02.01.2026 01:53 — 👍 31    🔁 7    💬 1    📌 0

🇦🇶 Sendoff to @milesobrien.com @zhonggg.bsky.social from @nytimes.com. I know a few #ITGP and #IODP379 researchers who'll want to follow along 🇦🇶 ! @polarrobs.bsky.social @drtrevorwilliams.bsky.social @wellner.bsky.social @diatomdiatribes.bsky.social @khorikawa.bsky.social @passchier.bsky.social

28.12.2025 21:42 — 👍 2    🔁 1    💬 1    📌 0

500-year paleoclimate record inferred from Greenland Juniper wood contextualizes current climate warming - Nature Communications Here, the authors combine newly collected juniper wood samples and herbarium samples, and published data to create a continuous, chronological paleoclimate record spanning the past ~500 years. This im...

www.nature.com/articles/s41...

29.12.2025 00:05 — 👍 0    🔁 0    💬 0    📌 0

Image showing front page of briefing document

🧪🧵 Future change to #ThwaitesGlacier, Antarctica constitutes the largest uncertainty in #sea-level rise forecasts. The Science Coordination Office of the International Thwaites Glacier Collaboration recently issued a briefing document summarising some key findings - thwaitesglacier.org/findings

26.10.2025 21:35 — 👍 183    🔁 96    💬 5    📌 16

24.12.2025 22:08 — 👍 2    🔁 2    💬 0    📌 0

West Antarctica’s history of rapid melting foretells sudden shifts in continent’s ‘catastrophic’ geology A picture of what West Antarctica looked like when its ice sheet melted in the past can offer insight into the continent’s future as the climate warms.

@wellner.bsky.social @passchier.bsky.social @diatomdiatribes.bsky.social @heatherfurlong.bsky.social @bas.ac.uk @awi.de theconversation.com/west-antarct...

23.12.2025 05:37 — 👍 1    🔁 1    💬 0    📌 0

Our latest paper was published in PNAS. This presents the geochemical evidence for the collapse of the West Antarctic Ice Sheet during the mid-Pliocene, based on results from IODP Exp 379 (2019).

#AmundsenSea #IODP #Exp379 #Pliocene

25.12.2025 11:57 — 👍 3    🔁 0    💬 0    📌 1

PNAS Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

Repeated major inland retreat of Thwaites and Pine Island glaciers (West Antarctica) during the Pliocene | PNAS www.pnas.org/doi/10.1073/...

25.12.2025 11:56 — 👍 5    🔁 2    💬 0    📌 1