Edward Doddridge
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View article: Impacts of Antarctic summer sea-ice extremes
Impacts of Antarctic summer sea-ice extremes Open
Antarctic sea ice plays many crucial roles in the physical environments and ecosystems of Antarctica and the Southern Ocean. In this study, we synthesize the physical, biogeochemical, ecosystem, and societal impacts of summers with extreme…
View article: Transient Antarctic Slope Current Response to Climate Change Including Meltwater
Transient Antarctic Slope Current Response to Climate Change Including Meltwater Open
The future response of the Antarctic Slope Current (ASC) to projected transient changes in winds, radiative forcing, and meltwater input is examined in a high‐resolution ocean‐sea ice model. Meltwater changes are found to dominate the almo…
View article: The Responses of Antarctic Sea Ice and Overturning Cells to Meridional Wind Forcing
The Responses of Antarctic Sea Ice and Overturning Cells to Meridional Wind Forcing Open
Meridional winds over the seasonal ice zone of the Antarctic have undergone changes and likely contributed to sea ice extent variability in recent decades. In this study, using observations and an eddy-resolving channel model of the Antarc…
View article: Closing the Loops on Southern Ocean Dynamics: From the Circumpolar Current to Ice Shelves and From Bottom Mixing to Surface Waves
Closing the Loops on Southern Ocean Dynamics: From the Circumpolar Current to Ice Shelves and From Bottom Mixing to Surface Waves Open
A holistic review is given of the Southern Ocean dynamic system, in the context of the crucial role it plays in the global climate and the profound changes it is experiencing. The review focuses on connections between different components …
View article: Closing the loops on Southern Ocean dynamics: From the circumpolar current to ice shelves and from bottom mixing to surface waves
Closing the loops on Southern Ocean dynamics: From the circumpolar current to ice shelves and from bottom mixing to surface waves Open
A holistic review is given of the Southern Ocean dynamic system, in the context of the crucial role it plays in the global climate and the profound changes it is experiencing. The review focuses on connections between different components …
View article: Genesis and Decay of Baroclinic Eddies in the Seasonally Ice-Covered Arctic Ocean
Genesis and Decay of Baroclinic Eddies in the Seasonally Ice-Covered Arctic Ocean Open
We explore the origin and evolution of mesoscale eddies in the seasonally ice-covered interior Arctic Ocean. Observations of ocean currents show a curious, and hitherto unexplained, vertical and temporal distribution of mesoscale activity.…
View article: Observational Evidence for a Regime Shift in Summer Antarctic Sea Ice
Observational Evidence for a Regime Shift in Summer Antarctic Sea Ice Open
In recent years, the Southern Ocean has experienced extremely low sea ice cover in multiple summers. These low events were preceded by a multidecadal positive trend that culminated in record high ice coverage in 2014. This abrupt transitio…
View article: Record low Antarctic sea ice coverage indicates a new sea ice state
Record low Antarctic sea ice coverage indicates a new sea ice state Open
In February 2023, Antarctic sea ice set a record minimum; there have now been three record-breaking low sea ice summers in seven years. Following the summer minimum, circumpolar Antarctic sea ice coverage remained exceptionally low during …
View article: Closing the loops on Southern Ocean dynamics: From the circumpolar current to ice shelves and from bottom mixing to surface waves
Closing the loops on Southern Ocean dynamics: From the circumpolar current to ice shelves and from bottom mixing to surface waves Open
A holistic review is given of the Southern Ocean dynamic system, in the context of the crucial role it plays in the global climate and the profound changes it is experiencing. The review focuses on connections between different components …
View article: Intrinsically episodic Antarctic shelf intrusions of circumpolar deep water via canyons
Intrinsically episodic Antarctic shelf intrusions of circumpolar deep water via canyons Open
The structure of the Antarctic Slope Current at the continental shelf is crucial in governing the poleward transport of warm water. Canyons on the continental slope may provide a pathway for warm water to cross the slope current and intrud…
View article: Comment on egusphere-2022-1280
Comment on egusphere-2022-1280 Open
The Chukchi Slope Current is a westward-flowing current along the Chukchi slope, which carries Pacific-origin water from the Chukchi shelf into the Canada Basin and helps set the regional hydrographic structure and ecosystem. Using a set o…
View article: Investigation Into Antarctic Slope Front Regimes Using an Idealised Isopycnal Model
Investigation Into Antarctic Slope Front Regimes Using an Idealised Isopycnal Model Open
<div>The Antarctic Slope Current is a current that flows westward around Antarctica and lies close to the coast on the continental shelf. The slope current region features steeply sloping isopycnals at the continental shelf, characte…
View article: Interannual SAM Modulation of Antarctic Sea Ice Extent Does Not Account for Its Long‐Term Trends, Pointing to a Limited Role for Ozone Depletion
Interannual SAM Modulation of Antarctic Sea Ice Extent Does Not Account for Its Long‐Term Trends, Pointing to a Limited Role for Ozone Depletion Open
The expansion of Antarctic sea ice since 1979 in the presence of increasing greenhouse gases remains one of the most puzzling features of current climate change. Some studies have proposed that the formation of the ozone hole, via the Sout…
View article: Genesis and Decay of Mesoscale Baroclinic Eddies in the Seasonally Ice-Covered Interior Arctic Ocean
Genesis and Decay of Mesoscale Baroclinic Eddies in the Seasonally Ice-Covered Interior Arctic Ocean Open
Observations of ocean currents in the Arctic interior show a curious, and hitherto unexplained, vertical and temporal distribution of mesoscale activity. A marked seasonal cycle is found close to the surface: strong eddy activity during su…
View article: Exploring the Role of the “Ice–Ocean Governor” and Mesoscale Eddies in the Equilibration of the Beaufort Gyre: Lessons from Observations
Exploring the Role of the “Ice–Ocean Governor” and Mesoscale Eddies in the Equilibration of the Beaufort Gyre: Lessons from Observations Open
Observations of Ekman pumping, sea surface height anomaly, and isohaline depth anomaly over the Beaufort Gyre are used to explore the relative importance and role of (i) feedbacks between ice and ocean currents, dubbed the “ice–ocean gover…
View article: The Southern Ocean Sea Surface Temperature Response to Ozone Depletion: A Multimodel Comparison
The Southern Ocean Sea Surface Temperature Response to Ozone Depletion: A Multimodel Comparison Open
The effect of the Antarctic ozone hole extends downward from the stratosphere, with clear signatures in surface weather patterns including a positive trend in the southern annular mode (SAM). Several recent studies have used coupled climat…
View article: Eddy Compensation Dampens Southern Ocean Sea Surface Temperature Response to Westerly Wind Trends
Eddy Compensation Dampens Southern Ocean Sea Surface Temperature Response to Westerly Wind Trends Open
Anthropogenic influences have led to a strengthening and poleward shift of westerly winds over the Southern Ocean, especially during austral summer. We use observations, an idealized eddy‐resolving ocean sea ice channel model, and a global…
View article: A Three‐Way Balance in the Beaufort Gyre: The Ice‐Ocean Governor, Wind Stress, and Eddy Diffusivity
A Three‐Way Balance in the Beaufort Gyre: The Ice‐Ocean Governor, Wind Stress, and Eddy Diffusivity Open
The Beaufort Gyre (BG) is a large anticyclonic circulation in the Arctic Ocean. Its strength is directly related to the halocline depth, and therefore also to the storage of freshwater. It has recently been proposed that the equilibrium st…
View article: The Ice‐Ocean Governor: Ice‐Ocean Stress Feedback Limits Beaufort Gyre Spin‐Up
The Ice‐Ocean Governor: Ice‐Ocean Stress Feedback Limits Beaufort Gyre Spin‐Up Open
The Beaufort Gyre is a key circulation system of the Arctic Ocean and its main reservoir of freshwater. Freshwater storage and release affects Arctic sea ice cover, as well as North Atlantic and global climate. We describe a mechanism that…
View article: Implications of Eddy Cancellation for Nutrient Distribution Within Subtropical Gyres
Implications of Eddy Cancellation for Nutrient Distribution Within Subtropical Gyres Open
The role of mesoscale eddies within the nutrient budget of subtropical gyres remains poorly understood and poorly constrained. We explore a new mechanism by which mesoscale eddies may contribute to these nutrient budgets, namely eddy cance…
View article: Aronnax: An idealised isopycnal ocean model
Aronnax: An idealised isopycnal ocean model Open
Aronnax is a highly idealised model for simulating large-scale (100-1000km) flows in theocean. Aronnax is intended for theoretical and empirical oceanographers, as a (relatively)fast and easy-to-use simulation model, bridging the gap betwe…
View article: Modulation of the Seasonal Cycle of Antarctic Sea Ice Extent Related to the Southern Annular Mode
Modulation of the Seasonal Cycle of Antarctic Sea Ice Extent Related to the Southern Annular Mode Open
Through analysis of remotely sensed sea surface temperature (SST) and sea ice concentration data, we investigate the impact of winds related to the Southern Annular Mode (SAM) on sea ice extent around Antarctica. We show that positive SAM …
View article: Modulation of the Seasonal Cycle of Antarctic Sea Ice Extent Related to the Southern Annular Mode
Modulation of the Seasonal Cycle of Antarctic Sea Ice Extent Related to the Southern Annular Mode Open
Through analysis of remotely sensed sea surface temperature (SST) and sea ice concentration data, we investigate the impact of winds related to the Southern Annular Mode (SAM) on sea ice extent around Antarctica. We show that positive SAM …
View article: Eddy Cancellation of the Ekman Cell in Subtropical Gyres
Eddy Cancellation of the Ekman Cell in Subtropical Gyres Open
The presence of large-scale Ekman pumping associated with the climatological wind stress curl is the textbook explanation for low biological activity in the subtropical gyres. Using an idealized, eddy-resolving model, it is shown that Eule…
View article: Influence of eddies on vertical transport and nutrients in subtropical gyres
Influence of eddies on vertical transport and nutrients in subtropical gyres Open
The presence of large-scale Ekman pumping associated with the climatological wind-stress curl is the textbook explanation for low biological activity in the subtropical gyres. Using an idealised model it is shown that Eulerian-mean Ekman p…