Andreas Klocker
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View article: Monitoring Antarctic krill (Euphausia superba) distribution in the Southern Ocean: environmental DNA (eDNA) adds to the toolbox
Monitoring Antarctic krill (Euphausia superba) distribution in the Southern Ocean: environmental DNA (eDNA) adds to the toolbox Open
Antarctic krill ( Euphausia superba Dana) is a key species of the Southern Ocean ecosystem, immensely abundant and targeted by the krill fishery. For their sustainable management, krill distribution and biomass estimates are required, typi…
View article: Decline of Antarctic Circumpolar Current due to polar ocean freshening
Decline of Antarctic Circumpolar Current due to polar ocean freshening Open
The Antarctic Circumpolar Current (ACC) is the world’s strongest ocean current and plays a disproportionate role in the climate system due to its role as a conduit for major ocean basins. This current system is linked to the ocean’s vertic…
View article: Aspects of the Global Thermohaline Circulation in the Absence of Wind Forcing
Aspects of the Global Thermohaline Circulation in the Absence of Wind Forcing Open
The global ocean’s overturning circulation plays an important role in climate and climate variability through its transport of heat, freshwater and nutrients. As part of this three-dimensional overturning circulation, dense waters sink in …
View article: Drivers of phytoplankton distribution, abundance and community composition off East Antarctica, from 55-80°E (CCAMLR Division 58.4.2 East)
Drivers of phytoplankton distribution, abundance and community composition off East Antarctica, from 55-80°E (CCAMLR Division 58.4.2 East) Open
Southern Ocean phytoplankton form the base of the Antarctic food web, influencing higher trophic levels through biomass and community structure. We examined phytoplankton distribution and abundance in the Indian Sector of the Southern Ocea…
View article: Observed water-mass characteristics and circulation off Prydz Bay, East Antarctica
Observed water-mass characteristics and circulation off Prydz Bay, East Antarctica Open
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 Mawson, Predators and Oceanography’ (TEMPO) experiment, and are described in this p…
View article: Deep convection drives oceanic overturning
Deep convection drives oceanic overturning Open
Research that combines fluid dynamics and climate science is uncovering the inner workings of the North Atlantic’s overturning circulation. Future changes to that circulation system could trigger major disruptions to global weather pattern…
View article: Future decline of Antarctic Circumpolar Current due to polar ocean freshening
Future decline of Antarctic Circumpolar Current due to polar ocean freshening Open
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View article: Impact of Deep Water Formation on Antarctic Circumpolar Transport During Gateway Opening
Impact of Deep Water Formation on Antarctic Circumpolar Transport During Gateway Opening Open
Ambiguity over the Eocene opening times of the Tasman Gateway and Drake Passage makes it difficult to determine the initiation time of the Antarctic Circumpolar Current. If the Tasman Gateway opened later than Drake Passage, then Australia…
View article: Arctic Ocean simulations in two high-resolution coupled climate models
Arctic Ocean simulations in two high-resolution coupled climate models Open
Large model spread and biases exist in simulating the Arctic Ocean water mass and circulations from the latest CMIP6 coupled and ocean-sea ice-only simulations. This can be at least partly attributed to large uncertainties due to unresolve…
View article: Late Miocene onset of the modern Antarctic Circumpolar Current
Late Miocene onset of the modern Antarctic Circumpolar Current Open
The Antarctic Circumpolar Current plays a pivotal role in global climate through its strong influence on the global overturning circulation, ocean heat and CO 2 uptake. However, when and how the Antarctic Circumpolar Current reached its mo…
View article: Deep Convection as the Key to the Transition From Eocene to Modern Antarctic Circumpolar Current
Deep Convection as the Key to the Transition From Eocene to Modern Antarctic Circumpolar Current Open
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 Antarctic Circumpolar Current (ACC). It has generally been thought that the opening of S…
View article: Dynamic Response to Ice Shelf Basal Meltwater Relevant to Explain Observed Sea Ice Trends Near the Antarctic Continental Shelf
Dynamic Response to Ice Shelf Basal Meltwater Relevant to Explain Observed Sea Ice Trends Near the Antarctic Continental Shelf Open
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 and Amundsen Seas, and a year‐round increase in the Ross Sea. Global climate mod…
View article: Deepening of Southern Ocean Gateway Leads to Abrupt Onset of a Deep‐Reaching Meridional Overturning Circulation
Deepening of Southern Ocean Gateway Leads to Abrupt Onset of a Deep‐Reaching Meridional Overturning Circulation Open
During the Eocene and the Eocene‐Oligocene transition, the lower cell of the meridional overturning circulation (MOC), associated with bottom water formation, underwent changes associated with the geological evolution of Southern Ocean gat…
View article: Deep-reaching global ocean overturning circulation generated by surface buoyancy forcing
Deep-reaching global ocean overturning circulation generated by surface buoyancy forcing Open
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 overturning circulation in this context, it is generally assumed that either intense in…
View article: Deep convection as the key to the transition from Eocene to modern Antarctic Circumpolar Current
Deep convection as the key to the transition from Eocene to modern Antarctic Circumpolar Current Open
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 Antarctic Circumpolar Current (ACC). It has generally been thought that the opening of S…
View article: Generation of the Internal Pycnocline in the Subpolar Southern Ocean by Wintertime Sea Ice Melting
Generation of the Internal Pycnocline in the Subpolar Southern Ocean by Wintertime Sea Ice Melting Open
The ocean's internal pycnocline is a layer of elevated stratification that separates the well‐ventilated upper ocean from the more slowly renewed deep ocean. Despite its pivotal role in organizing ocean circulation, the processes governing…
View article: Deepening of Southern Ocean gateway leads to abrupt onset of a deep-reaching meridional overturning circulation
Deepening of Southern Ocean gateway leads to abrupt onset of a deep-reaching meridional overturning circulation Open
During the Eocene-Oligocene transition, the meridional overturning circulation underwent large changes, associated with the geological evolution of Southern Ocean gateways. These are crucial for the Cenozoic climate transition from Greenho…
View article: Deep-Reaching Global Ocean Overturning Circulation Generated by Surface Buoyancy Forcing
Deep-Reaching Global Ocean Overturning Circulation Generated by Surface Buoyancy Forcing Open
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 overturning circulation in this context, it is generally assumed that either intense i…
View article: Effect of the Isthmus of Panama on the sensitivity of the climate system to variations in Earth's orbital parameters
Effect of the Isthmus of Panama on the sensitivity of the climate system to variations in Earth's orbital parameters Open
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View article: Diapycnal advection by nonlinear processes in the ocean
Diapycnal advection by nonlinear processes in the ocean Open
The nonlinear nature of the equation of state of seawater leads to numerous interesting processes in the ocean. Two of the more well-known processes caused by nonlinearities in the equation of state are cabbeling and thermobaricity. Other …
View article: Impact of Deep Water Formation on Antarctic Circumpolar Transport During Gateway Opening
Impact of Deep Water Formation on Antarctic Circumpolar Transport During Gateway Opening Open
Ambiguity over the Eocene opening times of the Tasman Gateway and Drake Passage makes it difficult to determine the initiation time of the Antarctic Circumpolar Current (ACC). If the Tasman Gateway opened later than Drake Passage, then Aus…
View article: The sensitivity of the Eocene–Oligocene Southern Ocean to the strength and position of wind stress
The sensitivity of the Eocene–Oligocene Southern Ocean to the strength and position of wind stress Open
The early Cenozoic opening of the Tasmanian Gateway (TG) and Drake Passage (DP), alongside the synergistic action of the westerly winds, led to a Southern Ocean transition from large, subpolar gyres to the onset of the Antarctic Circumpola…
View article: Ocean models of the paleooceanographic development of the Australian Antarctic Basin through the Oligocene
Ocean models of the paleooceanographic development of the Australian Antarctic Basin through the Oligocene Open
Ocean modelling results of "Southern Ocean biogenic blooms freezing-in Oligocene colder climates" by Hochmuth et al. Manuscript Abstract Crossing a key atmospheric CO2 threshold triggered a fundamental global climate reorganisation ~34 mil…
View article: Ocean‐Sea Ice Processes and Their Role in Multi‐Month Predictability of Antarctic Sea Ice
Ocean‐Sea Ice Processes and Their Role in Multi‐Month Predictability of Antarctic Sea Ice Open
Antarctic sea ice is a critical component of the climate system and a vital habitat for Southern Ocean ecosystems. Understanding the underlying physical processes and improving Antarctic sea ice prediction is of broad interest. Using the m…
View article: The sensitivity of the Eocene-Oligocene Southern Ocean to strength and position of wind stress
The sensitivity of the Eocene-Oligocene Southern Ocean to strength and position of wind stress Open
The early Cenozoic opening of the Tasmanian Gateway (TG) and Drake Passage (DP), alongside the synergistic action of the westerly winds, led to a Southern Ocean transition from large, subpolar gyres to the onset of the Antarctic Circumpola…
View article: Generation of the Southern Ocean pycnocline by sea ice-ocean interactions
Generation of the Southern Ocean pycnocline by sea ice-ocean interactions Open
The ocean’s permanent pycnocline is a layer of elevated stratification that separates the well-ventilated upper ocean from the more slowly-renewed deep ocean. Despite its pivotal role in organizing ocean circulation, the processes governin…
View article: Ocean-sea ice processes and their role on multi-month predictability of Antarctic sea ice
Ocean-sea ice processes and their role on multi-month predictability of Antarctic sea ice Open
Earth and Space Science Open Archive This work has been accepted for publication in Geophysical Research Letters. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…