Search Results - "Klocker, Andreas"

Opening the window to the Southern Ocean: The role of jet dynamics by Klocker, Andreas

“…The surface waters of the Southern Ocean act as a control valve through which climatically important tracers such as heat, freshwater, and CO are transferred…”
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Circum‐Antarctic Shoreward Heat Transport Derived From an Eddy‐ and Tide‐Resolving Simulation by Stewart, Andrew L., Klocker, Andreas, Menemenlis, Dimitris

“…Almost all heat reaching the bases of Antarctica's ice shelves originates from warm Circumpolar Deep Water in the open Southern Ocean. This study quantifies…”
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Deep Convection as the Key to the Transition From Eocene to Modern Antarctic Circumpolar Current by Xing, Qianjiang, Klocker, Andreas, Munday, David, Whittaker, Joanne

“…From the Eocene (∼50 million years ago) to today, Southern Ocean circulation has evolved from the existence of two ocean gyres to the dominance of the…”
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Gateway-driven weakening of ocean gyres leads to Southern Ocean cooling by Sauermilch, Isabel, Whittaker, Joanne M., Klocker, Andreas, Munday, David R., Hochmuth, Katharina, Bijl, Peter K., LaCasce, Joseph H.

“…Declining atmospheric CO 2 concentrations are considered the primary driver for the Cenozoic Greenhouse-Icehouse transition, ~34 million years ago. A role for…”
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Deepening of Southern Ocean Gateway Leads to Abrupt Onset of a Deep‐Reaching Meridional Overturning Circulation by Xing, Qianjiang, Klocker, Andreas, Munday, David, Whittaker, Joanne

“…During the Eocene and the Eocene‐Oligocene transition, the lower cell of the meridional overturning circulation (MOC), associated with bottom water formation,…”
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Water mass transformation by cabbeling and thermobaricity by Groeskamp, Sjoerd, Abernathey, Ryan P., Klocker, Andreas

“…Water mass transformation is an important process for the global ocean circulation. Nonlinearities in the equation of state of seawater lead to water mass…”
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Diagnostics of isopycnal mixing in a circumpolar channel by Abernathey, Ryan, Ferreira, David, Klocker, Andreas

“…•We examine lateral mixing in an idealized model which resembles the Antarctic Circumpolar Current.•Diffusivities are computed for passive and active tracers,…”
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Dynamic Response to Ice Shelf Basal Meltwater Relevant to Explain Observed Sea Ice Trends Near the Antarctic Continental Shelf by Huneke, Wilma G. C., Hobbs, William R., Klocker, Andreas, Naughten, Kaitlin A.

“…Observed Antarctic sea ice trends up to 2015 have a distinct regional and seasonal pattern, with a loss during austral summer and autumn in the Bellingshausen…”
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Southern Ocean biogenic blooms freezing-in Oligocene colder climates by Hochmuth, Katharina, Whittaker, Joanne M., Sauermilch, Isabel, Klocker, Andreas, Gohl, Karsten, LaCasce, Joseph H.

“…Crossing a key atmospheric CO 2 threshold triggered a fundamental global climate reorganisation ~34 million years ago (Ma) establishing permanent Antarctic ice…”
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Deep-Reaching Global Ocean Overturning Circulation Generated by Surface Buoyancy Forcing by Klocker, Andreas, Munday, David, Gayen, Bishakhdatta, Roquet, Fabien, LaCasce, Joseph H.

“…In contrast with the atmosphere, which is heated from below by solar radiation, the ocean is both heated and cooled from above. To drive a deep-reaching…”
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Drivers of phytoplankton distribution, abundance and community composition off East Antarctica, from 55-80°E (CCAMLR Division 58.4.2 East) by Heidemann, Asta C., Westwood, Karen J., Foppert, Annie, Wright, Simon W., Klocker, Andreas, Vives, Clara R., Wotherspoon, Simon, Bestley, Sophie

“…Southern Ocean phytoplankton form the base of the Antarctic food web, influencing higher trophic levels through biomass and community structure. We examined…”
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Observed water-mass characteristics and circulation off Prydz Bay, East Antarctica by Foppert, Annie, Bestley, Sophie, Shadwick, Elizabeth H., Klocker, Andreas, Vives, Clara R., Liniger, Guillaume, Westwood, Karen J.

“…Circulation and water masses in the greater Prydz Bay region were surveyed in the austral summer 2021 (January-March) during the ‘Trends in Euphausiids off…”
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A biologically relevant method for considering patterns of oceanic retention in the Southern Ocean by Mori, Mao, Corney, Stuart P., Melbourne-Thomas, Jessica, Klocker, Andreas, Sumner, Michael, Constable, Andrew

“…[Display omitted] •We calculate retention time of biological particles using satellite altimetry.•Clear relationship between ocean dynamics and retention time…”
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Using satellite altimetry to inform hypotheses of transport of early life stage of Patagonian toothfish on the Kerguelen Plateau by Mori, Mao, Corney, Stuart P., Melbourne-Thomas, Jessica, Welsford, Dirk C., Klocker, Andreas, Ziegler, Philippe E.

“…[Display omitted] •First study to simulate larval transport of Patagonian toothfish on the Kerguelen Plateau in the Indian Sector of the Southern Ocean.•Use of…”
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The Deep Ocean Buoyancy Budget and Its Temporal Variability by Palter, Jaime B., Griffies, Stephen M., Samuels, Bonita L., Galbraith, Eric D., Gnanadesikan, Anand, Klocker, Andreas

“…Despite slow rates of ocean mixing, observational and modeling studies suggest that buoyancy is redistributed to all depths of the ocean on surprisingly short…”
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Sustained Upwelling of Subsurface Iron Supplies Seasonally Persistent Phytoplankton Blooms Around the Southern Kerguelen Plateau, Southern Ocean by Schallenberg, Christina, Bestley, Sophie, Klocker, Andreas, Trull, Thomas W., Davies, Diana M., Gault‐Ringold, Melanie, Eriksen, Ruth, Roden, Nicholas P., Sander, Sylvia G., Sumner, Michael, Townsend, Ashley T., Merwe, Pier, Westwood, Karen, Wuttig, Kathrin, Bowie, Andrew

“…Although the supply of iron generally limits phytoplankton productivity in the Southern Ocean, substantial seasonal blooms are observed over and downstream of…”
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An approximate geostrophic streamfunction for use in density surfaces by McDougall, Trevor J., Klocker, Andreas

“…An approximate expression is derived for the geostrophic streamfunction in approximately neutral surfaces, φ n, namely φ n = 1 2 Δ p δ ˜ ˜ - 1 12 T b Θ ρ Δ Θ Δ…”
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Ocean‐Sea Ice Processes and Their Role in Multi‐Month Predictability of Antarctic Sea Ice by Libera, Stephy, Hobbs, Will, Klocker, Andreas, Meyer, Amelie, Matear, Richard

“…Antarctic sea ice is a critical component of the climate system and a vital habitat for Southern Ocean ecosystems. Understanding the underlying physical…”
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Advection of baroclinic eddies by depth mean flow by Klocker, Andreas, Marshall, David P.

“…Observed zonal propagation speeds of nonlinear eddies, derived using an eddy tracking algorithm, are compared with the classical long Rossby wave speed,…”
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Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts by Priester, C. Robert, Melbourne-Thomas, Jessica, Klocker, Andreas, Corney, Stuart

“…•First spatial realisation of NPZD model with optimal control algorithm.•Model reproduces seasonal processes in open ocean.•Model convergence was better for…”
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