Upper Limit - Sea Level Rise (@UpperLimitSLR) header
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Setting an UPPER LIMIT on sea-level rise as a second metric offers a clear benchmark for mitigation and adaptation strategies and provides a relatable goal.

Joined June 2025
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BIG NEWS: We've launched our first issue of The Upper Limit Monthly Newsletter to share the latest developments on sea-level rise science, policy, and action. Please help us grow our newsletter by subscribing at bit.ly/ULSignUp and sharing this post! #upperlimitslr
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The ‘Kelvin wave’ hitting California is a potent warning about sea-level rise “What it really tells us is: if our infrastructure can’t handle this winter,” Swain says, “that means it definitely won’t handle that being the average condition.” scientificamerican.com/.../t… #upperlimitslr
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The Upper Limit Project is hosting the Tallahassee Voices on Sea-Level Rise storytelling workshop on Tuesday, October 13th at 5:30pm at 603 N MLK Jr Blvd, Tallahassee during FL Climate Week. @VoLoFoundation #Upperlimitslr #FloridaClimateWeek2026 #abovewaterG20 #drawthelineSLR
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As sea levels rise due to climate change, flooding is more common along U.S. coasts where about 30% of the population lives. New Climate Central data shows human-caused sea level rise made up eight in every 10 days w/ coastal flooding across 71 U.S. locations. #upperlimitslr
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US National Weather Service Tampa Bay Florida: As heavy rain continues to fall across the region once again... continue to be vigilant as you hit the roads. NEVER drive through floodwaters. You never know how deep the water is or if the road has been washed away. #upperlimitslr
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Thank you Representative Pramila Jayapal for honored the life and legacy of Rafe Pomerance, founder of the Upper Limit Project, in this moving floor speech to the U.S. Congress. youtu.be/YtxBZTf6-mA?si=zOrC… @RepJayapal
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June is Oceans Month. From "What if We Get it Right?" marine biologist Dr. Ayana Elizabeth Johnson shares her substack below. #OceanMonth #upperlimitslr #ClimateAction substack.com/@ayanaeliza/not…
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On this Earth Day, ask yourself: How much is too much sea-level rise? We measure what we value. If we value the survival of coastal communities, we must define the limits of what they can endure. Learn more at sealevelrise-upperlimit.org. #upperlimitslr #EarthDay2026
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"Scientific research shows that millions of people live in areas facing inundation, but now, a new study finds those numbers have been vastly underestimated." We need an Upper Limit on sea-level rise. More at sealevelrise-upperlimit.org/ NPR: share.google/xxeXf69iE6JGPqu… #UpperLimitSLR
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Read the latest from Upper Limit founder Rafe Pomerance on the real reason Greenland is important to national security: the melting ice. #sealevelrise #upperlimitslr #greenland #USNationalSecurity theinvadingsea.com/2026/03/0…
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As global temperatures continue to rise, so do sea levels. This could put many of Europe's most popular island territories at the greatest risk of flooding, erosion, and even disappearing altogether. share.google/UPDqFtoAiAsxDcb… #UpperlimitSLR #climatechange
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How much sea-level rise we must endure will depend on how quickly we can reduce our greenhouse gas emissions that are melting Greenland and Antarctica. The NYT followed along on this scientific expedition to the Thwaites glacier. nytimes.com/live/2025/climat… #upperlimitslr
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The Upper Limit was in E&E News by Politico. Here's an excerpt: "The Upper Limit Project argues that sea-level rise — an existential threat to coastal communities around the world — could be a better motivator for reducing global emissions. " More at sealevelrise-upperlimit.com
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At #AGU25 in NOLA to share why we need a limit on sea-level rise as a second metric to communicate the urgency of climate-caused flooding. #upperlimitslr @UpperLimitSLR
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"Our local star, which already provides heat and light and photosynthesis, is prepared to offer us all the energy we could ever use, and in the process perhaps help rescue us from an otherwise impossible moment." #upperlimitslr newyorker.com/news/annals-of…
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