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Propagation of the powder stream for laser metal deposition
No full textDie vorliegende Arbeit untersucht die Einflussgrößen auf die Ausbreitung des Pulverstrahls für das Laser-Pulver-Auftragschweißen. Eine neu entwickelte Methode zur Charakterisierung des Pulverstrahls erlaubt die Berechnung des Pulverspotdurchmessers und liefert Erkenntnisse zur radialen Homogenität. Ein Modell zur Berechnung der geometrischen Ausbreitung des Pulverstrahls ermöglicht Vorhersagen über die Wahrscheinlichkeitsverteilung der Partikel. Die Ergebnisse zeigen, dass die Rauheit der Injektorinnenflächen und die daraus resultierende Streuung des Reflexionswinkels die Divergenz des Pulverstrahls bestimmen. Die Auslegung der Pulverinjektoren beeinflusst die Partikelgeschwindigkeit, die wiederum maßgeblich die Porosität der Schweißspur beeinflusst. Die Erkenntnisse tragen zur bedarfsgerechten Auslegung von Pulverdüsen bei und fördern eine höhere Prozesseffizienz sowie eine robustere Pulverzuführung
Beyond the gaze: Rhythms of surveillance, care, and recognition in the transcontinental race
No full textThis paper examines the Transcontinental Race (TCR), a self-supported ultra-distance cycling event across Europe, as a site where surveillance, care, and recognition intersect in complex ways. Drawing on two autoethnographic reflections from the 2023 (TCRNo9) and 2025 (TCRNo11) editions of the race, the paper traces a shift in how mediated practices shape riders’ experiences and relationships. I analyze race tracking technologies and online reporting as forms of participatory, benign surveillance: GPS traces, digital narratives, and spectators’ affective investments create a shared rhythm of visibility that connects riders, organizers, volunteers, and audiences. At the same time, the race experience inevitably exceeds surveillant gazes, foregrounding embodied rhythms, sensory intensities, and affective encounters that cannot be fully captured by digital traces. By integrating both perspectives, the paper conceptualizes the TCR as a communicative figuration that continuously reorganizes visibility, agency, and care. In doing so, it contributes to broader debates on mediatization, mobility, and the relational dynamics of surveillance.5
From Peatlands to the Sea: aggregation, adsorption, and persistence of dissolved organic matter in coastal systems
No full textThe ocean plays a fundamental role in the global carbon cycle, acting as a major long-term sink for atmospheric carbon dioxide (CO₂). Among the various carbon reservoirs, dissolved organic matter (DOM) is a substantial and dynamic component that links terrestrial and marine carbon fluxes. However, the processes controlling the transformation of DOM into particulate organic matter (POM), which facilitates long-term carbon sequestration via sedimentation, remain poorly understood. This is particularly true for transitional environments along the terrestrial-marine continuum, such as coastal systems and
continental shelves, where riverine, autochthonous, and marine DOM sources intersect and interact under highly dynamic environmental conditions.
This dissertation investigates the mechanisms governing DOM-to-POM transformation, focusing on aggregation and adsorption processes in the North Sea and adjacent terrestrial systems. The work addresses critical knowledge gaps regarding the interplay between DOM composition, environmental drivers, and the role of mineral particles in modulating these transformation processes. Through a combination of laboratory experiments and targeted analyses, this work provides new insights into the reactivity and fate of DOM in coastal environments, contributing to a better understanding of the biogeochemical cycling of
carbon in the ocean.
The dissertation consists of three scientific manuscripts, each examining specific aspects of DOM-POM transformation along the land-sea continuum:
Manuscript 1 – Solid-phase extracted DOM defies aggregation and adsorption
This study assesses whether solid-phase extracted DOM (SPE-DOM), a representative fraction of semi-labile and refractory DOM, undergoes aggregation or adsorption under controlled laboratory conditions. Aggregation and adsorption experiments were conducted with SPE-DOM isolated from seawater, testing a range of physical and parameters such as turbulence and particle presence. The results demonstrate that SPE-DOM exhibits a remarkably low potential for aggregation and adsorption. Neither the addition of mineral particles nor variations in environmental conditions led to significant removal of SPE-DOM from the dissolved phase. These findings
suggest that SPE-DOM, due to its specific molecular composition and chemical characteristics, is inherently resistant to conversion into POM. This challenges the prevailing assumption that all DOM fractions are equally available for aggregation and subsequent export to the ocean interior. The study highlights the need to differentiate between DOM fractions based on their reactivity and structural properties when assessing their role in carbon cycling and sequestration.
Manuscript 2 – Flocculation and Adsorption of Terrestrial DOM: Transport Dynamics
from Northern German Rivers to the Southern North Sea
This manuscript investigates how flocculation and adsorption processes regulate the transformation and transport of terrestrially derived DOM from northern German rivers into the southern North Sea. Riverine DOM represents a major input of organic carbon to coastal systems, yet its fate and transformation pathways remain poorly constrained. DOM originating from river water of Weser, Elbe and Ems were analyzed alongside controlled laboratory experiments to quantify DOM removal via flocculation and adsorption. The study revealed that terrestrial DOM is highly susceptible to adsorption in the estuarine mixing zone, particularly under increasing salinity. Mineral particles of terrestrial origin, such as clays and silts, significantly enhance DOM removal through adsorption. The results demonstrate a strong link between the physicochemical conditions of the estuary and the efficiency of DOM-to-POM transformation. These findings imply that estuarine and coastal systems act as effective biogeochemical filters, regulating the export of terrestrial DOM to the open ocean. The study emphasizes the importance of considering local hydrodynamic and sedimentary conditions when evaluating coastal carbon budgets.
Manuscript 3 – From Peatlands to the Ocean: The Role of Adsorption in DOM Cycling
Across Aquatic Systems
Expanding the scope beyond estuarine environments, this manuscript broadens the spatial and ecological scope by examining adsorption processes along a complete land-sea continuum, from peatlands in northern Germany through river systems to the southern North Sea. The study focuses on the interaction between DOM of different origins and mineral particles, assessing how adsorption modulates DOM transport, transformation, and potential sequestration. Adsorption experiments were conducted using three distinct DOM sources—fen-derived DOM, riverine DOM, and marine DOM—alongside two mineral types (kaolinite and calcium carbonate). The results reveal that the adsorption potential of DOM is strongly source-dependent. Terrestrial DOM, rich in aromatic and carboxyl-rich compounds, exhibited the highest adsorption affinity, particularly onto clay minerals. Marine DOM, in contrast, showed lower adsorption rates, reflecting differences in molecular composition and
charge properties. Moreover, temporal aspects of adsorption were evaluated, indicating that aging and structural rearrangements of adsorbed DOM may enhance long-term carbon stabilization. This manuscript demonstrates that adsorption processes act as a key mechanism for DOM transformation and carbon retention along the terrestrial-marine gradient. It provides new evidence that terrestrial DOM is selectively removed and transformed in transitional environments, contributing to carbon sequestration in sediments and potentially altering carbon fluxes at regional and global scales.
Conclusion
This dissertation advances our understanding of DOM-POM transformation processes and highlights the critical role of adsorption in regulating coastal carbon dynamics. By integrating experimental and conceptual approaches, it provides a comprehensive assessment of how DOM composition, environmental conditions, and mineral interactions shape carbon fluxes along the terrestrial-marine gradient. These findings contribute to broader efforts to quantify carbon sequestration and assess the resilience of coastal ecosystems in the face of global climate change
Land-ocean transport in the Laptev Sea during the last deglaciation: Sediment chronology, organic matter characteristics and freshwater dynamics
No full textThe Arctic continues to warm at an accelerated pace, about four times faster than the global average, and Arctic coastlines continue to erode, and permafrost containing considerable amount of ancient organic carbon continue to thaw. The insights gained from past deglaciation scenarios offer a valuable framework for anticipating the Arctic’s response to ongoing, and future climate change. As such, one of the main objectives of this dissertation is to provide additional perspectives on ancient carbon release resulting from permafrost degradation during the last deglaciation. This will help to advance our understanding of permafrost thaw dynamics and the release of aged carbon in the context of anticipated climate warming and rising sea levels. Furthermore, the last deglaciation period witnessed the disintegration of ice sheets in the Northern Hemisphere, and consequently large volumes of freshwater were released into the Arctic Ocean, with major impact on ocean circulation patterns and overall climate. Understanding the sources and timings of freshwater runoff are crucial for reconstructing abrupt climate shifts and for improving cryosphere-ocean response for the current global warming. Moreover, in order to undertake correlation between different environmental archives, and determine the exact timing of past climatic events, it is imperative to establish precise chronological frameworks. This dissertation integrates three interconnected studies from the Laptev Sea in the Siberian Arctic, offering a comprehensive perspective on Arctic deglaciation, encompassing improved age-depth model establishment, permafrost carbon release, and freshwater influxes.
The reliability of paleoclimate reconstructions, especially in polar regions, is often constrained by uncertainties in marine reservoir ages. In the Laptev Sea, precise chronological frameworks have historically been limited. In the first study, we used a pioneer approach to synchronize authigenic 10Be/9Be of sediment core PS2458-4 from the Laptev Sea with 10Be-records from absolutely dated ice cores. This method successfully provided a refined local marine radiocarbon reservoir correction (ΔR) of +345 ± 60 14C years, equating to a marine reservoir age of 848 ± 90 14C years. This ΔR value was used to improve the age-depth model of core PS2458-4. The approach offered a reliable temporal framework, potentially enhancing our capacity to precisely align Laptev Sea paleoclimatic records with other globally distributed archives, and improving our understanding of regional climate interactions during the last deglaciation.
The second study investigated the sources and mechanisms of ancient carbon release from thawing Arctic permafrost. Utilizing the refined age-depth model for core PS2458-4 from the Laptev Sea, we analyzed terrigenous biomarkers (lignin phenols, HMW n-alkanoic acids, and brGDGTs), and compound-specific radiocarbon analyses of HMW n-alkanoic acids to reconstruct the dynamics of ancient organic carbon mobilization during the last deglaciation. The results demonstrated that the highest accumulation rates of strongly pre-aged terrestrial biomarkers occurred during the warm Bølling-Allerød and Pre-Boreal periods, coinciding with rapid sea level rises. These observations indicated that ancient permafrost carbon release primarily resulted from coastal erosion driven by rapid sea level rise. Additionally, during the cold Younger Dryas period relatively lower accumulation rates of terrigenous biomarkers with younger radiocarbon ages were noted, suggesting input predominantly from surface runoff rather than from inland and coastal erosion. These findings significantly enhance our understanding of the interactions between climate-driven sea level changes and permafrost dynamics. They emphasized the role of coastal erosion as a potent mechanism for ancient carbon mobilization, and highlighted its implications for future carbon feedback mechanisms under continuing Arctic warming.
In the third study, we aimed to provide answers with regards to the source of the freshwater signal that was recorded in the Laptev Sea at the onset of the Younger Dryas. We used the authigenic Pb isotopic ratios as a sensitive tracer for freshwater, and the Pb isotopic results revealed no significant abrupt shifts indicative of large-scale freshwater runoff from the Eastern Siberian hinterland during the Younger Dryas period. Instead, the Pb isotopic composition showed subtle and gradual variability over several millennia. These results favored the scenario that the freshwater signal observed in the Laptev Sea during the Younger Dryas probably originated from the decaying Laurentide Ice Sheet from the North America continent. The freshwater was probably then advected to the Laptev Sea via Arctic Ocean circulation patterns. This finding highlighted the complex interplay between freshwater dynamics, ocean currents, and regional climate during major climatic transitions in the Arctic.
In summary, this dissertation provided an integrated view of Arctic deglacial history through the integration of precise chronological reconstruction, permafrost carbon feedbacks, and freshwater dynamics. The multidisciplinary approach provided a critical context for the forecasting of future climate trends within Arctic regions experiencing amplified warming and extensive permafrost degradation
KI-Governance im Hochschulwesen – Erkenntnisse aus der Implementierung kommunikativer KI und KI-basierter formativer Rückmeldeverfahren
No full textDie Implementierung von Künstlicher Intelligenz (KI) im Sinne von KI-basierten Werkzeugen in Hochschulen ist eine Aufgabe von Vielen und eine von vielen Aufgaben. Über die Perspek-tive einer KI-Governance adressiert der Beitrag, wie und in unter welchen Bedingungen KI ihren Weg in Hochschulen finden kann. Ausgehend von den Governance-Fragen werden zent-rale „Lessons Learned“ im Rahmen des durch das BMFTR-geförderte Projekt „IMPACT“ zur Implementierung von KI in eine Hochschul-Governance vorgestellt und eingeordnet.005
Systematik für die ökologische Bewertung von Flugzeugkabinen zur Integration in den Konfigurationsprozess unter Verwendung von Lebenszyklusdaten
No full textVerkehrsflugzeuge werden auch für die Mobilität der Zukunft eine wichtige Rolle spielen und zur globalen Vernetzung beitragen. Im Hinblick auf die gesteckten Ziele im Bereich der ökologischen Nachhaltigkeit steht die gesamte Luftfahrtindustrie jedoch vor enormen Herausforderungen. Daher werden von den Flugzeugherstellern und deren Zulieferern zum einen völlig neuartige, langfristig orientierte Flugzeugkonzepte entwickelt. Zum anderen wird nach kurzfristigen Möglichkeiten zur Erreichung der ökologischen Ziele gesucht. Entsprechend werden bestehende Flugzeugtypen kontinuierlich inkrementell weiterentwickelt. Darüber hinaus besteht für Fluggesellschaften die Möglichkeit zur kundenindividuellen Konfiguration der Flugzeugtypen, welche Auswirkungen auf die ökologische Nachhaltigkeit hat. Dies trifft insbesondere für die Flugzeugkabine zu und ist daher von hoher Relevanz für die Fluggesellschaften. Aus dieser Motivation heraus schlägt diese Arbeit eine Systematik für die ökologische Bewertung von Flugzeugkabinen zur Integration in diesen Prozess vor. Hierzu wird in dieser Arbeit ein konzeptioneller Rahmen für die Integration der Systematik in den Konfigurationsprozess anhand von Forschungsfragen aufgespannt. Hieraus ergeben sich für die vorliegende Arbeit drei thematische Schwerpunkte: Erstens die Ausgestaltung eines Prozessmodells zur Integration von Zuliefererdaten mit dem Ziel eine ausreichende Datengrundlage zu gewährleisten. Zweitens die Entwicklung einer spezifischen und parametrisierten Methodik zur ökologischen Bewertung von Flugzeugkabinen. Hierbei werden die Lebenszyklusdaten sowie die Spezifika der Luftfahrtindustrie in Form der Betriebsphase berücksichtigt. Drittens die Konzeptionierung eines Phasenmodells, welches die Implementierung in den Konfigurationsprozess ermöglicht. Das Ergebnis dieser Arbeit umfasst damit eine Systematik, welche unter Verwendung von Lebenszyklusdaten die ökologische Bewertung von Flugzeugkabinen innerhalb des Konfigurationsprozesses erlaubt. Zudem wird eine softwaretechnische Umsetzung für die weitere Operationalisierung vorgestellt. Mit der abschließenden Analyse der Übertragbarkeit der Systematik leistet die vorliegende Arbeit ein Beitrag über den Anwendungskontext der Kabine hinaus
Evaluation and application of TROPOMI data: cloud retrieval algorithms and global shipping NO2 detection
No full textSatellite-based atmospheric measurements provide an important data basis for monitoring air pollution over long periods. Using the DOAS technique, tropospheric columns of nitrogen dioxide (NO2), a key air pollutant, can be retrieved from these observations. The TROPOspheric Monitoring Instrument (TROPOMI), launched on Sentinel-5P in October 2017, provides daily global measurements, significantly enhancing the ability to detect small-scale emissions like shipping plumes due to its high signal-to-noise ratio and spatial resolution.
Clouds have a substantial impact on satellite measurements of tropospheric trace gases in the UV, VIS, and NIR spectral ranges. Therefore, NO2 retrievals rely on information on cloud fraction and cloud height from satellite cloud products. In the first part of this thesis, the cloud parameters from different cloud retrieval algorithms for TROPOMI are compared. Overall, the cloud products show qualitative consistency in processor version 1.x and reasonable agreement in processor version 2.x, except for the VIIRS cloud fraction. Differences between the cloud retrievals are found especially for low cloud heights and small cloud fractions, i.e., clouds that are particularly relevant for tropospheric trace gas retrievals. Cloud fractions primarily differ over snow- and ice-covered pixels and scenes with sun glint, for which only MICRU includes an explicit treatment. All cloud parameters exhibit systematic issues related to across-track dependence, and the consistency among these parameters depends strongly on how the data is filtered. In summary, clear differences were found between the results of various algorithms, but these differences are reduced in the most recent versions of the cloud data.
Shipping is an important source of NOx emissions worldwide, negatively affecting marine environments and human health. The second part of the thesis uses the TROPOMI tropospheric NO2 slant columns (tSCDs) to qualitatively identify global shipping routes. Preprocessing techniques, including iterative high-pass and Fourier filtering, markedly improve the detection of shipping lanes, revealing many previously undetectable routes. The analysis examines the impact of high-pass filter box sizes, demonstrating that smaller sizes enhance the visibility of narrow shipping features, whereas larger box sizes increase overall NO2 signals. Additionally, various flagging criteria are investigated that affect NO2 signal distribution, highlighting the critical importance of careful selection for accurate emission monitoring. Filtered TROPOMI NO2 tSCDs over oceans show a strong correlation with shipping activities, as confirmed by comparison with the CAMS-GLOB-SHIP inventory, and reveal unknown shipping routes. TROPOMI also effectively captures NO2 emissions from oil and gas platforms. Finally, the filtered TROPOMI tropospheric NO2 vertical columns (tVCDs) are compared with those from the CAMS global model. While both datasets show NO2 enhancements over global shipping lanes, the CAMS NO2 values are significantly larger than the TROPOMI measurements in the North Atlantic and strongly depend on the masking threshold in the high-pass filtering method in the South Atlantic
Studienreport Triggerpunkte: Konsens und Konflikt in der Gegenwartsgesellschaft : Qualitative Teilstudie
No full textDer im Rahmen des Leibniz-Projekts "Neue Ungleichheiten, neue Spaltungen? Eine politische Soziologie der Gegenwartsgesellschaft" entstandene Datensatz enthält Transkripte von sechs Diskussionsgruppen (sogenannte Fokusgruppen als offene Explorationsverfahren). In Kooperation mit Ipsos wurden drei Fokusgruppeninterviews im November 2021 in Berlin und drei im Mai 2022 in Essen durchgeführt, jeweils mit sechs bis neun Teilnehmenden und begleitender Moderation. Mittels eines Rekrutierungsfragebogens wurden in beiden Regionen je drei Fokusgruppen zusammengesetzt: eine mit Angehörigen der unteren Mittelschicht, eine mit Angehörigen der oberen Mittelschicht und eine mit Personen, die gegenläufige Wertorientierungen vertreten (sogenannte KRISIS-Gruppen). Es wurde zudem auf ein möglichst ausgewogenes Verhältnis aus verschiedenen Altersgruppen (16 bis 75 Jahre), Geschlechtern, Wohnorten, Bildungsniveaus und Berufen geachtet. Für die Fokusgruppeninterviews wurden brisante mediale Schlagzeilen als Diskussionsstimuli genutzt, um subjektive Wahrnehmungen und Argumente der Teilnehmenden zu jeweils themenbezogenen Ungleichheitskritiken und -rechtfertigungen zu erfassen. Es wurden zusätzlich demografische Merkmale (Alter, Geschlecht, Wohnort, sozioökonomischer Status etc.) und Werteinstellungen zu den verschiedenen Arenen der Ungleichheit erfasst. Zur Erschließung der argumentativen Struktur der Gruppendiskussionen wurden Verfahren der thematischen Analyse angewendet mit der sequentiellen und vergleichenden Tiefenanalyse ausgewählter Passagen nach der dokumentarischen Methode kombiniert und mit einer Metaphernanalyse ergänzt. Der inhaltliche Fokus der Auswertung lag darauf, welche Argumente und kulturellen Repertoires genutzt werden, um eigene Positionen zu begründen und Fremdpositionen zu kritisieren. Ziel war außerdem, zu verstehen, warum bestimmte Themen mit hohem Erregungspotential, sogenannte Triggerpunkte, so intensiv diskutiert werden. Die sechs anonymisierten Transkripte stehen bei Qualiservice zur wissenschaftlichen Nachnutzung in der Forschung und der akademischen Lehre zur Verfügung
Orbital to millennial-scale atmosphere-ocean-cryosphere interactions and interhemispheric teleconnections in the Southeast Pacific (IODP Site U 1542)
No full textFrom orbital (10 to 100 thousand years or kyr) to millennial (1 to 10 kyr) timescales, the
Southern Ocean is thought to substantially modulate global climate and ocean variability.
Most critical factors include the Southern Ocean’s impact on surface, intermediate,
and deep-water circulation affecting global heat, salt, and nutrient distribution and the
processes influencing storage and outgassing of atmospheric CO2. This PhD thesis is focused on the reconstruction of past climatic variability in the Southeast Pacific spanning
the past 800,000 years, based on the analysis of different organic paleoclimatic tracers, in
a sedimentary archive from International Ocean Discovery Program (IODP Site U1542,
situated on the southern Chilean margin. This work has generated a series of millennialscale resolution paleoclimatic records of sea surface temperature (SST), bottom current velocity, accumulation of terrestrial organic compounds from leaf waxes and soil bacteria, and ice-rafted debris. Results show that SST covaries with the strength of the Antarctic Circumpolar Current (ACC). The millennial-scale variability appears to be a persistent and inherent feature of the climate over the last eight glacial cycles. The recurrence of millennial-scale events is independent of the glacial state, but the amplitude increases when the glacial state lasts longer. The sediment record at Site U1542 underlines a persistent close link between millennial-scale climatic events from both hemispheres and
that the millennial-scale fluctuations of the ACC covary with atmospheric CO2 release
over the past 800,000 years. In a second application of the proxy datasets, the location
of Site U1542 near the former Patagonian ice sheet (PIS), enabled the reconstruction
of the past variability of the PIS on multiple glacial cycles using terrestrial proxies leaf
waxes compounds and ice-rafted debris. The timing of terrestrial sediment deposition
aligns notably with the extent of PIS moraines. These data reveal a close connection between sediment export and SST in the Southeast Pacific, suggesting that the PIS extent
is controlled by ocean temperature forcing. The third study of this thesis aims to explore
the meridional sea surface changes of the Southern Ocean using a biomarker tracer for
polar water masses. A compilation of Southern Ocean records highlights a long period
of retreated polar water between 410 and 310 kyr, following the Mid-Brunhes Transition.
This retreat notably mirrors low atmospheric CO2 concentrations, emphasizing the
role of the Southern Ocean in the global carbon budget. Overall, the records developed
from the sedimentary archive Site U1542 provide an unprecedented picture of orbital
and millennial-scale Southern Ocean variability over the past 800,000 years, highlighting
the close atmosphere-ocean-cryosphere interactions of Earth’s climate
Einfluss der Atmosphäre auf den Einstrom warmen Wassers in the Filchnertrog im 21. Jahrhundert
No full textHeat transport between the deep ocean and the southern Weddell Sea continental shelf plays a key role in a potential future melting of the western Antarctic ice sheet. Recent studies have highlighted the Filchner Trough as an area for a potential cold-to-warm tipping point in the ocean circulation, governed by the density gradient across the shelf break, influenced by sea ice formation and wind stress. This thesis firstly explores the representation of on-shore heat transport in the Filchner Trough in climate simulations for a suite of carbon dioxide emission scenarios from high-mitigation to high-emission for the 21st century. The model reproduces observed seasonal pulses of warm water transport into the Filchner Trough, mainly driven by seasonally increased Dense Shelf Water (DSW) formation and export, and a wind driven shoaling of the thermocline at the shelf break. The two high-emission scenarios suggest a strongly increased heat transport onto the continental shelf before the year 2100. Over the course of the 21st century, seasonal pulses increase in temperature and duration until a tipping point is reached and the regime shift occurs.
The effect of sea ice and DSW formation on the continental shelf, as well as the positionof the thermocline at the shelf break, are regulated by the atmospheric conditions. Especially temperature and wind fields influence the sea ice formation in coastal polynyas – areas of open ocean surrounded by sea ice, adjacent to the coast and with high sea ice productivity – on the continental shelf of the southern Weddell Sea. While a reference ocean simulation forced with atmospheric data from a high-emission climate simulation does not produce a regime shift, dynamic downscaling of the atmospheric data to 15 km decreases the DSW formation on the shelf enough for a regime shift to be initiated. The better resolution of orographic features decreases the wind speed of the westerlies crossing the peninsula, while stronger offshore winds can be found along several sectors of the coastline of the southern Weddell Sea. The combination of reduced wind-driven sea ice export and higher summer air temperatures decreases the density of the shelf waters at an accelerated rate compared to the reference simulation, making a regime shift possible.
The Antarctic Slope Front prevents the transport of saline Warm Deep Water onto the continental shelf. In the southern Weddell Sea, the density distribution of the front takes on the form of a distinct V-shape, formed by the interplay of Ekman downwelling and DSW export. With the occurrence of a regime shift, the V-shape is temporarily disturbed and confined to the upper ocean afterwards. This shows that a weakening of the Slope Front in the upper ocean is no indicator for an imminent regime shift in the Filchner Trough.
In summary, this thesis examines controls of the heat transport into Filchner Trough for present and future climate and shows that the possibility for a regime shift in the Filchner Trough is high with current climate policies in effect. However, a regime shift might be avoided if global warming is kept below the 2°C limit