The northern Antarctic Peninsula (and nearby islands like King George) has historically been one of the fastest-warming regions on Earth, with significant warming from the mid-20th century through the late 1990s/early 2000s.

However, multiple lines of evidence support a hiatus or pause in that rapid warming during parts of the 21st century:

Earlier work (e.g., Turner et al., 2016) documented an “absence of 21st century warming” on the Peninsula after the strong late-20th-century rise, with cooling or stabilization in some periods.

Recent analyses (including reconstructions up to the early 2020s) show regional cooling signals in parts of the Peninsula, sometimes exceeding -1 to -2°C in specific intervals (e.g., post-2003 in some datasets).

Glacier behavior is highly variable: While many Peninsula glaciers retreated dramatically after ice-shelf collapses (e.g., Larsen B in 2002), retreat rates have not been uniform or constantly accelerating everywhere. Some periods show slowed retreat or localized advance linked to cooler phases, sea-ice conditions, or SAM variability.

Climatological and Geological Drivers of Glacier Retreat Patterns in Marian Cove, King George Island:

A Remote Sensing Study from 1956 to 2022 is the full title of the peer-reviewed paper by Ji-Eun Park, Hyun-Cheol Kim, Sung-Jae Lee, and Hyoungseok Lee, published in February 2026 in the International Journal of Applied Earth Observation and Geoinformation (Volume 146, 105029).

It is an open-access remote-sensing analysis that reconstructs the longest continuous record of frontal changes for the tidewater glacier in Marian Cove using 19 satellite and aerial images spanning 66 years.

Authors: Ji-Eun Park, Hyun-Cheol Kim, Sung-Jae Lee, Hyoungseok Lee

Journal: International Journal of Applied Earth Observation and Geoinformation, Volume 146, February 2026, Article 105029 (Open Access)
DOI: 10.1016/j.jag.2025.105029

Climatological and geological drivers of glacier retreat patterns in Marian Cove, King George Island: A remote sensing study from 1956 to 2022 – ScienceDirect

This peer-reviewed remote-sensing study reconstructs the longest continuous record (66 years) of frontal changes for the tidewater glacier in Marian Cove, a small fjord on the southwestern coast of King George Island (South Shetland Islands, northern Antarctic Peninsula). It integrates 19 high-quality visible images with in-situ, reanalysis, and bathymetric data to quantify retreat and identify the coupled drivers.

“The tidewater glacier in Marian Cove has retreated substantially toward the coastal cliffs over the past six decades. Using 19 satellite and aerial images from 1956 to 2022, we quantified frontal changes along 17 transects defined by glacier orientation and topography. The glacier exhibited a non-linear retreat pattern, alternating between phases of rapid retreat, slower retreat, and short advances. Mean retreat rates fluctuated from −10.8 to 178 m year⁻¹ over the study period. From 1956 to 1978, the terminus remained stable while grounded on a shallow sill, but detachment from this topographic control initiated sustained retreat. The onset of major retreat coincided with a transition from negative to positive Southern Annular Mode (SAM) anomalies, which enhanced atmospheric warming and promoted oceanic heat delivery. Retreat accelerated during positive ocean and air temperature anomalies, whereas cooler phases slowed retreat. Variability across transects was strongly linked to bathymetry and vertical temperature stratification. Time series of surface elevation revealed land ice thinning after 2017, corresponding to the rapid retreat observed between 2017 and 2019. By integrating the longest record of glacier frontal change in Marian Cove with environmental observations, this study demonstrates how coupled fjord geometry–ocean–atmosphere interactions govern retreat behavior. These findings improve understanding of the sensitivity of tidewater glaciers in the northern Antarctic Peninsula under climate change.”

Retreat Patterns (Non-Linear and Phased)

Overall: Highly variable, non-linear behavior. No steady monotonic acceleration. Mean rates ranged −10.8 m yr⁻¹ (advance/stability) to +178 m yr⁻¹ (rapid retreat).

Phases (selected examples):

• 1956–1978: Stable (grounded on shallow sill); rate ~0.67 m yr⁻¹.
• 1979–1985: Rapid retreat (~42.4 m yr⁻¹).
• 1986–1989: Minor net advance (−1.6 m yr⁻¹).
• 1989–2000: Pronounced retreat (~56 m yr⁻¹, ~650 m total in key period).
• 2009–2017: Slowed retreat.
• 2017–2019: Accelerated (linked to land-ice thinning).
• Post-2019: Declined as terminus reached coastal cliffs by 2022.

Transect totals: Up to 1,972 m (Group 1) and 1,751 m (Group 2) net retreat. EPR/LRR maxima: 47.7 m yr⁻¹ and 40.7 m yr⁻¹ respectively.

Climatological Drivers

Southern Annular Mode (SAM): Major retreat onset aligned with shift from negative to positive SAM anomalies (stronger westerlies). Positive SAM correlated strongly with air temperature (r = 0.8) and promoted warmer ocean water intrusion.

Temperature anomalies: Positive air (ERA5) and ocean (SST) anomalies drove acceleration; winter warming stronger (0.034 °C yr⁻¹) than summer. Negative anomalies (e.g., 1988) linked to advance or slowdown. In-situ data showed +2 °C sea-temperature anomaly during 2017–2019 rapid phase.

Geological Drivers (Fjord Geometry and Bathymetry)

Shallow sill/pinning point (~40 m depth): Grounded and stabilized terminus 1956–1978; detachment after thinning triggered sustained retreat.

Bathymetry control: Deeper central areas retreated faster (strong correlation r ≈ 0.885–0.888 between depth and LRR). Shallower margins limited warm-water intrusion.

Vertical stratification: Cold surface layer + warmer subsurface intrusion + subglacial discharge influenced calving and melt.

The authors conclude that these localized, coupled processes govern retreat behavior more directly than any uniform long-term trend.

This improves understanding of why tidewater glaciers in the northern Antarctic Peninsula exhibit such high spatial and temporal variability.

“These findings demonstrate that glacier retreat in Marian Cove cannot be attributed to a single factor but instead reflects the combined influence of atmospheric, oceanic, and topographic processes.”
“By integrating the longest record of glacier frontal change in Marian Cove with environmental observations, this study demonstrates how coupled fjord geometry–ocean–atmosphere interactions govern retreat behavior.”

The authors present a “new framework” for interpreting local glaciomarine systems and note improved understanding of tidewater glacier sensitivity “under climate change.”

Bottom line from the paper:

Marian Cove’s glacier shows clear non-linear, episodic retreat strongly modulated by site-specific topography and natural modes (especially SAM) interacting with ocean heat — not a simple linear response.

This 66-year record provides a valuable baseline for modeling similar fjord systems in the northern Antarctic Peninsula. The full open-access article (including all figures: terminus maps, rate timelines, SAM/temperature overlays, bathymetry correlations) is available on ScienceDirect.