Keiji Horikawa
@khorikawa.bsky.social
Professor, University of Toyama. Paleoceanographer and geochemist.
Pinned
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...
www.pnas.org
Repeated major inland retreat of Thwaites and Pine Island glaciers (West Antarctica) during the Pliocene | PNAS www.pnas.org/doi/10.1073/...
Reposted by Keiji Horikawa
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.
January 9, 2026 at 7:48 AM
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.
www.nature.com/articles/s43...
An novel dating method
An novel dating method
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
January 7, 2026 at 7:55 AM
www.nature.com/articles/s43...
An novel dating method
An novel dating method
Reposted by Keiji Horikawa
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
January 2, 2026 at 1:53 AM
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
Reposted by Keiji Horikawa
🇦🇶 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
December 28, 2025 at 9:42 PM
🇦🇶 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
Reposted by Keiji Horikawa
🧪🧵 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
October 26, 2025 at 9:35 PM
🧪🧵 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
Reposted by Keiji Horikawa
AIS Pliocene heartbeat
YouTube video by Anna Ruth Halberstadt
youtu.be
December 24, 2025 at 10:08 PM
Reposted by Keiji Horikawa
@wellner.bsky.social @passchier.bsky.social @diatomdiatribes.bsky.social @heatherfurlong.bsky.social @bas.ac.uk @awi.de theconversation.com/west-antarct...
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.
theconversation.com
December 23, 2025 at 5:37 AM
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
#AmundsenSea #IODP #Exp379 #Pliocene
Repeated major inland retreat of Thwaites and Pine Island glaciers (West Antarctica) during the Pliocene | PNAS www.pnas.org/doi/10.1073/...
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...
www.pnas.org
December 25, 2025 at 11:57 AM
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
#AmundsenSea #IODP #Exp379 #Pliocene
Repeated major inland retreat of Thwaites and Pine Island glaciers (West Antarctica) during the Pliocene | PNAS www.pnas.org/doi/10.1073/...
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...
www.pnas.org
December 25, 2025 at 11:56 AM
Repeated major inland retreat of Thwaites and Pine Island glaciers (West Antarctica) during the Pliocene | PNAS www.pnas.org/doi/10.1073/...