Explanipedia

nextGEMS: entering the era of kilometer-scale Earth system modeling Open

Hans Segura, Xabier Pedruzo‐Bagazgoitia, Philipp Weiss, Sebastian K. Müller, Thomas Rackow , et al. · 2025

The Next Generation of Earth Modeling Systems (nextGEMS) project aimed to produce multidecadal climate simulations, for the first time, with resolved kilometer-scale (km-scale) processes in the ocean, land, and atmosphere. In only 3 years,…

Sensitivity of the tropical Atlantic to vertical mixing in two ocean models (ICON-O v2.6.6 and FESOM v2.5) Open

Swantje Bastin, Aleksei Koldunov, Florian Schütte, Oliver Gutjahr, Marta Mrozowska , et al. · 2025

Ocean general circulation models still have large upper-ocean biases, including in tropical sea surface temperature, that are possibly connected to the representation of vertical mixing. In earlier studies, the ocean vertical mixing parame…

nextGEMS: entering the era of kilometer-scale Earth system modeling Open

Hans Segura, Xabier Pedruzo‐Bagazgoitia, Philipp Weiss, Sebastian K. Müller, Thomas Rackow , et al. · 2025

The Next Generation of Earth Modeling Systems (nextGEMS) project aimed to produce multi-decadal climate simulations, for the first time, with resolved kilometer-scale (km-scale) processes in the ocean, land, and atmosphere. In only three y…

Toward an integrated pantropical ocean observing system Open

Gregory R. Foltz, Yassir A. Eddebbar, Janet Sprintall, Antonietta Capotondi, Sophie Cravatte , et al. · 2025

Global climate is regulated by the ocean, which stores, releases, and transports large amounts of mass, heat, carbon, and oxygen. Understanding, monitoring, and predicting the exchanges of these quantities across the ocean’s surface, their…

Seasonal productivity of the equatorial Atlantic shaped by distinct wind-driven processes Open

Peter Brandt, Mareike Körner, James N. Moum, Marisa Roch, Ajit Subramaniam , et al. · 2025

The eastern equatorial Atlantic hosts a productive marine ecosystem that depends on upward supply of nitrate, the primary limiting nutrient in this region. The annual productivity peak, indicated by elevated surface chlorophyll levels, occ…

Strength and timing of austral winter Angolan coastal upwelling Open

Mareike Körner, Peter Brandt, Marcus Dengler · 2024

The tropical Angolan upwelling system (tAUS) is a highly productive ecosystem of great socio-economic importance. Productivity peaks in austral winter and is linked to the passage of remotely forced upwelling coastal trapped waves (CTWs), …

A Defined Diet Combined with Sonicated Inoculum Provides a High Incidence, Moderate Severity Form of Experimental Autoimmune Encephalomyelitis (EAE) Open

Mariella Martorelli, Marcus Dengler, Julian Laux, Tina Fischer, Agne Vaiceliunaite , et al. · 2024

A defined fiber/high-sugar diet with sonicated inoculum provides for a moderate severity, high incidence, and less variable EAE. The resulting uniformity in animal response and associated cytokine patterns, and the strong link to a defined…

Sensitivity of the tropical Atlantic to vertical mixing in two ocean models (ICON-O v2.6.6 and FESOM v2.5) Open

Swantje Bastin, Aleksei Koldunov, Florian Schütte, Oliver Gutjahr, Marta Mrozowska , et al. · 2024

Ocean General Circulation Models still have large upper-ocean biases e.g. in tropical sea surface temperature, possibly connected to the representation of vertical mixing. In earlier studies, the ocean vertical mixing parameterisation has …

Drivers and impact of the 2021 extreme warm event in the tropical Angolan upwelling system Open

Rodrigue Anicet Imbol Koungue, Peter Brandt, Arthur Prigent, Léo Costa Aroucha, Joke F. Lübbecke , et al. · 2024

ATOMIX benchmark datasets for dissipation rate measurements using shear probes Open

Ilker Fer, Marcus Dengler, Peter Holtermann, Arnaud Le Boyer, Rolf G. Lueck · 2024

Turbulent mixing in the ocean, lakes and reservoirs facilitates the transport of momentum, heat, nutrients, and other passive tracers. Turbulent fluxes are proportional to the rate of turbulent kinetic energy dissipation per unit mass, ε .…

Corrigendum: Turbulent diapycnal fluxes as a pilot Essential Ocean Variable Open

Arnaud Le Boyer, Nicole Couto, Matthew H. Alford, Henri F. Drake, Cynthia Bluteau , et al. · 2024

Descrip,on Mathema,cal Defini,on Units Essen,al Ocean Variable □□ ! , □□ " , □□ # , □□ $ Subsurface turbulent fluxes □□ ! = - □□ □□ % {□□ & □□ & } ≈ □□ ' □□ ( W kg -1 □□ " = -□□□□ ) {□□ & □□ & } ≈ □□□□ ) □□ * □□□□ □□□□ W m -2 □□ # = -{□□ &…

Best practices recommendations for estimating dissipation rates from shear probes Open

Rolf G. Lueck, Ilker Fer, Cynthia Bluteau, Marcus Dengler, Peter Holtermann , et al. · 2024

As a part of the Scientific Committee on Oceanographic Research (SCOR) Working Group #160 “Analyzing ocean turbulence observations to quantify mixing” (ATOMIX), we have developed recommendations on best practices for estimating the rate of…

Observations of Eddy - Internal Wave Interactions in the Tropics Open

Marco Schulz, Florian Schütte, Marcus Dengler, Tim Fischer · 2024

Based on an extensive dataset obtained from multiple individual ship-based samplings of mesoscale eddies and a long-term mooring (2006-2023), interactions between mesoscale eddies and internal waves are analyzed. Theory predicts that antic…

Coastal trapped waves and tidal mixing control primary production in the tropical Angolan upwelling system Open

Mareike Körner, Peter Brandt, Séréna Illig, Marcus Dengler, Ajit Subramaniam , et al. · 2024

Eastern boundary upwelling systems are hotspots of marine life and primary production. The strength and seasonality of upwelling in these systems are usually related to local wind forcing. However, in some tropical upwelling systems, seaso…

Turbulent diapycnal fluxes as a pilot Essential Ocean Variable Open

Arnaud Le Boyer, Nicole Couto, Matthew H. Alford, Henri F. Drake, Cynthia Bluteau , et al. · 2023

We contend that ocean turbulent fluxes should be included in the list of Essential Ocean Variables (EOVs) created by the Global Ocean Observing System. This list aims to identify variables that are essential to observe to inform policy and…

Correction to: Nitrogen fixation rates in the Guinea Dome and the equatorial upwelling regions in the Atlantic Ocean Open

Á. Fernández, Rainer Kiko, Helena Hauss, Douglas S. Hamilton, Eric P. Achterberg , et al. · 2023

Nitrogen fixation rates in the Guinea Dome and the equatorial upwelling regions in the Atlantic Ocean Open

Á. Fernández, Rainer Kiko, Helena Hauss, Douglas S. Hamilton, Eric P. Achterberg , et al. · 2023

Biological nitrogen fixation is a key process balancing the loss of combined nitrogen in the marine nitrogen cycle. Its relevance in upwelling or high nutrient regions is still unclear, with the few available studies in these regions of th…

nextGEMS: Output of the WP6 ocean vertical mixing sensitivity runs (timeseries) Open

Swantje Bastin, Aleksei Koldunov, Helmuth Haak, Nikolay Koldunov, Sergey Danilov , et al. · 2023

In work package 6 of the nextGEMS project, several ocean-only model runs were performed with FESOM (Version 2.0) and ICON-O (Version 2.6.6), to test the sensitivity of the upper tropical Atlantic to different settings of the vertical mixin…

nextGEMS: Output of the WP6 ocean vertical mixing sensitivity runs (timeseries) Open

Swantje Bastin, Aleksei Koldunov, Helmuth Haak, Nikolay Koldunov, Sergey Danilov , et al. · 2023

In work package 6 of the nextGEMS project, several ocean-only model runs were performed with FESOM (Version 2.0) and ICON-O (Version 2.6.6), to test the sensitivity of the upper tropical Atlantic to different settings of the vertical mixin…

Wind Dependencies of Deep Cycle Turbulence in the Equatorial Cold Tongues Open

James N. Moum, William D. Smyth, Kenneth Hughes, Deepak Cherian, Sally J. Warner , et al. · 2023

Several years of moored turbulence measurements from χ pods at three sites in the equatorial cold tongues of Atlantic and Pacific Oceans yield new insights into proxy estimates of turbulence that specifically target the cold tongues. They …

Physical processes and biological productivity in the upwelling regions of the tropical Atlantic Open

Peter Brandt, Gaël Alory, Founi Mesmin Awo, Marcus Dengler, Sandrine Djakouré , et al. · 2023

In this paper, we review observational and modelling results on the upwelling in the tropical Atlantic between 10∘ N and 20∘ S. We focus on the physical processes that drive the seasonal variability of surface cooling and the upward nutrie…

Seasonal cycle of sea surface temperature in the tropical Angolan Upwelling System Open

Mareike Körner, Peter Brandt, Marcus Dengler · 2023

The Angolan shelf system represents a highly productive ecosystem. Throughout the year the sea surface is cooler near the coast than further offshore. The lowest sea surface temperature (SST), strongest cross-shore temperature gradient, an…

Nitrogen fixation rates in the Guinea Dome and the Equatorial upwelling regions in the Atlantic Ocean Open

Á. Fernández, Rainer Kiko, Helena Hauss, Douglas S. Hamilton, Eric P. Achterberg , et al. · 2022

Biological nitrogen fixation is a key process balancing the loss of combined nitrogen in the marine nitrogen cycle. Its relevance in upwelling or high nutrient regions is still under debate, with the few available studies in these regions …

Physical processes in the upwelling regions of the tropical Atlantic Open

Peter Brandt, Gaël Alory, Founi Mesmin Awo, Marcus Dengler, Sandrine Djakouré , et al. · 2022

In this paper, we review observational and modelling results on the upwelling in the inner tropical Atlantic. We focus on the physical processes that drive the seasonal variability of surface cooling and upward nutrient flux required to ex…

Comment on egusphere-2022-973 Open

Mareike KÃ¶rner, Peter Brandt, Marcus Dengler · 2022

The Angolan shelf system represents a highly productive ecosystem. Throughout the year sea surface temperatures (SSTs) are cooler near the coast than further offshore. Lowest SSTs, the strongest cross-shore temperature gradient and maximum…

Seasonal cycle of sea surface temperature in the tropical Angolan upwelling system Open

Mareike Körner, Peter Brandt, Marcus Dengler · 2022

The Angolan shelf system represents a highly productive ecosystem. Throughout the year sea surface temperatures (SSTs) are cooler near the coast than further offshore. Lowest SSTs, the strongest cross-shore temperature gradient and maximum…

Global perspectives on observing ocean boundary current systems Open

R.E. Todd, F.P. Chavez, S. Clayton, S.E. CRAVATTE, M.P. Goes , et al. · 2022

Ocean boundary current systems are key components of the climate system, are home to highly productive ecosystems, and have numerous societal impacts. Establishment of a global network of boundary current observing systems is a critical pa…

Tropical Instability Waves and Wind‐Forced Cross‐Equatorial Flow in the Central Atlantic Ocean Open

Finn Ole Heukamp, Peter Brandt, Marcus Dengler, Franz Philip Tuchen, Michael J. McPhaden , et al. · 2022

Based on velocity data from a long‐term moored observatory located at 0°N, 23°W we present evidence of a vertical asymmetry during the intraseasonal maxima of northward and southward upper‐ocean flow in the equatorial Atlantic Ocean. Perio…

Sediment Release in the Benguela Upwelling System Dominates Trace Metal Input to the Shelf and Eastern South Atlantic Ocean Open

Te Liu, Stephan Krisch, Ruifang C. Xie, Mark J. Hopwood, Marcus Dengler , et al. · 2022

Upwelling of subsurface waters injects macronutrients (fixed N, P, and Si) and micronutrient trace metals (TMs) into surface waters supporting elevated primary production in Eastern Boundary Upwelling Regions. The eastern South Atlantic fe…

Deep Cycle Turbulence in Atlantic and Pacific Cold Tongues Open

James N. Moum, Kenneth Hughes, E. Shroyer, William D. Smyth, Deepak Cherian , et al. · 2022

Multiyear turbulence measurements from oceanographic moorings in equatorial Atlantic and Pacific cold tongues reveal similarities in deep cycle turbulence (DCT) beneath the mixed layer (ML) and above the Equatorial Undercurrent (EUC) core.…

Marcus Dengler YOU? Author Swipe