Mastodawn

The Arctic Coastal Erosion Model - Overview, Developments, and Calibration at Drew Point, Alaska
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https://doi.org/10.22541/essoar.174086594.45589925/v1 <-- shared paper
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#Alaska #permafrost #coastalerosion #Arctic #permafrost #modeling #climateresilience #coast #coastal #erosion #sloughing #coastline #polaramplification #climatechange #ArcticCoastalErosion #ACE #model #modeling #oceanographic #atmospheric #oceanic #finiteelement #thermoabrasion #storm #stormsurge #fieldwork #calibration #geomechanics #sediments #geochemistry
#SandiaNationalLaboratories #USGS

Ruth Mottram Jan 14

Fantastic work by @CopernicusECMWF visualising Climate Change through 2025 - the Antarctica numbers are eye-opening (+1.06°C)-> higher anomaly recorded in 2025 than almost anywhere else, except of course the Arctic +1.37°C

#PolarAmplification

https://climate.copernicus.eu/global-climate-highlights-2025

Global Climate Highlights 2025 | Copernicus

The Global Climate Highlights 2025 report provides an early, concise analysis of the climate of the the year 2025.

Ruth Mottram Jan 14

Fantastic work by @copernicusecmwf.bsky.social visualising Climate Change through 2025 - the Antarctica numbers are eye-opening (+1.06°C)-> higher anomaly recorded in 2025 than almost anywhere else, except of course the Arctic +1.37°C #PolarAmplification climate.copernicus.eu/global-clima...

Global Climate Highlights 2025

Global Climate Highlights 2025 | Copernicus

The Global Climate Highlights 2025 report provides an early, concise analysis of the climate of the the year 2025.

Dr. Or M. Bialik Jun 21, 2024

#WeekendReading: Fokkema et al. demonstrate #PolarAmplification on orbital time scales in the early #Eocene—fast atmospheric feedback does not require ice.
https://cp.copernicus.org/articles/20/1303/2024/

Polar amplification of orbital-scale climate variability in the early Eocene greenhouse world

Abstract. Climate variability is typically amplified towards polar regions. The underlying causes, notably albedo and humidity changes, are challenging to accurately quantify with observations or models, thus hampering projections of future polar amplification. Polar amplification reconstructions from the ice-free early Eocene (∼56–48 Ma) can exclude ice albedo effects, but the required tropical temperature records for resolving timescales shorter than multi-million years are lacking. Here, we reconstruct early Eocene tropical sea surface temperature variability by presenting an up to ∼4 kyr resolution biomarker-based temperature record from Ocean Drilling Program (ODP) Site 959, located in the tropical Atlantic Ocean. This record shows warming across multiple orbitally paced carbon cycle perturbations, coeval with high-latitude-derived deep-ocean bottom waters, showing that these events represent transient global warming events (hyperthermals). This implies that orbital forcing caused global temperature variability through carbon cycle feedbacks. Importantly, deep-ocean temperature variability was amplified by a factor of 1.7–2.3 compared to the tropical surface ocean, corroborating available long-term estimates. This implies that fast atmospheric feedback processes controlled meridional temperature gradients on multi-million year, as well as orbital, timescales during the early Eocene. Our combined records have several other implications. First, our amplification factor is somewhat larger than the same metric in fully coupled simulations of the early Eocene (1.1–1.3), suggesting that models slightly underestimate the non-ice-related – notably hydrological – feedbacks that cause polar amplification of climate change. Second, even outside the hyperthermals, we find synchronous eccentricity-forced temperature variability in the tropics and deep ocean that represent global mean sea surface temperature variability of up to 0.7 °C, which requires significant variability in atmospheric pCO2. We hypothesize that the responsible carbon cycle feedbacks that are independent of ice, snow, and frost-related processes might play an important role in Phanerozoic orbital-scale climate variability throughout geological time, including Pleistocene glacial–interglacial climate variability.

Larry Neufeld Sep 14, 2023

This has big consequences for the planet: Ice cores reveal Antarctica is warming twice as fast as global average #ClimateChange #Antarctica #Arctic #globalwarming #polaramplification #sealevel https://www.carbonbrief.org/guest-post-ice-cores-reveal-antarctica-is-warming-twice-as-fast-as-global-average/

Guest post: Ice cores reveal Antarctica is warming twice as fast as global average - Carbon Brief

Antarctica is warming twice as fast as the global average, according to new research published in Nature Climate Change.

Carbon Brief

Ariadne Sep 7, 2023

" #Antarctica #warming much faster than models predicted in ‘deeply concerning’ sign for sea levels - Study finds ‘direct evidence’ of polar amplification on continent as scientists warn of implications of ice loss

Antarctica is likely warming at almost twice the rate of the rest of the world and faster than climate change models are predicting, with potentially far-reaching implications for global sea level rise, according to a scientific study.
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“All our projections for future sea level rise use these low rates of warming. Our models might be underestimating the loss of ice that we might get,” she said."

https://www.theguardian.com/world/2023/sep/08/antarctica-warming-much-faster-than-models-predicted-in-deeply-concerning-sign-for-sea-levels

#SeaLevelRise #Antarctica #PolarAmplification #GlobalWarming #ClimateCrisis #Climate #Klima #Klimakrise #ClimateDiary #ClimateChange

Antarctica warming much faster than models predicted in ‘deeply concerning’ sign for sea levels

Study finds ‘direct evidence’ of polar amplification on continent as scientists warn of implications of ice loss

The Guardian