Malte F. Jansen
YOU?
Author Swipe
View article: Slantwise convection and heat transport in icy moon oceans
Slantwise convection and heat transport in icy moon oceans Open
Ocean heat transport on icy moons shapes the ice shell topography, a primary observable of these moons. Two key processes control the heat transport: baroclinic instability driven by surface buoyancy contrasts and convective instability dr…
View article: Symmetric Instability in a Boussinesq Fluid on a Rotating Planet
Symmetric Instability in a Boussinesq Fluid on a Rotating Planet Open
Symmetric instability has broad applications in geophysical and planetary fluid dynamics. It plays a crucial role in the formation of mesoscale rainbands at mid‐latitudes on Earth, instability in the ocean's mixed layer, and slantwise conv…
View article: Response of the Atlantic Meridional Overturning Circulation to a Sudden Surface Warming and Amplification of the Hydrological Cycle
Response of the Atlantic Meridional Overturning Circulation to a Sudden Surface Warming and Amplification of the Hydrological Cycle Open
An idealized ice–ocean model is used to study the time-dependent Atlantic meridional overturning circulation (AMOC) responses to a sudden uniform surface warming and/or an amplified evaporation minus precipitation ( E − P ) forcing. At tra…
View article: A Simple Model for Global Temperature Control on Dansgaard–Oeschger Oscillations
A Simple Model for Global Temperature Control on Dansgaard–Oeschger Oscillations Open
During the last glacial period, the Northern Hemisphere climate underwent dramatic swings between relatively warm periods and cold periods—the Dansgaard–Oeschger oscillations. Here, we use recent progress in our theoretical understanding o…
View article: The Averaged Hydrostatic Boussinesq Ocean Equations in Generalized Vertical Coordinates
The Averaged Hydrostatic Boussinesq Ocean Equations in Generalized Vertical Coordinates Open
Due to their limited resolution, numerical ocean models need to be interpreted as representing filtered or averaged equations. How to interpret models in terms of formally averaged equations, however, is not always clear, particularly in t…
View article: The Averaged Hydrostatic Boussinesq Equations in Generalized Vertical Coordinates
The Averaged Hydrostatic Boussinesq Equations in Generalized Vertical Coordinates Open
Due to their limited resolution, numerical ocean models need to be interpreted as representing filtered or averaged equations. How to interpret models in terms of formally averaged equations, however, is not always clear, particularly in t…
View article: The Global Overturning Circulation and the Role of Non‐Equilibrium Effects in ECCOv4r4
The Global Overturning Circulation and the Role of Non‐Equilibrium Effects in ECCOv4r4 Open
We quantify the volume transport and watermass transformation rates of the global overturning circulation using the Estimating the Circulation and Climate of the Ocean version 4 release 4 (ECCOv4r4) reanalysis product. The ECCO solution sh…
View article: The Effect of Salinity on Ocean Circulation and Ice–Ocean Interaction on Enceladus
The Effect of Salinity on Ocean Circulation and Ice–Ocean Interaction on Enceladus Open
Observational data suggest that the ice shell on Enceladus is thicker at the equator than at the pole, indicating an equator-to-pole ice flow. If the ice shell is in an equilibrium state, the mass transport of the ice flow must be balanced…
View article: Comparing Two Parameterizations for the Restratification Effect of Mesoscale Eddies in an Isopycnal Ocean Model
Comparing Two Parameterizations for the Restratification Effect of Mesoscale Eddies in an Isopycnal Ocean Model Open
There are two distinct parameterizations for the restratification effect of mesoscale eddies: the Greatbatch and Lamb (1990, GL90, https://journals.ametsoc.org/view/journals/phoc/20/10/1520-0485_1990_020_1634_opvmom_2_0_co_2.xml?tab_body=a…
View article: Why Are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets
Why Are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets Open
Understanding surface temperature is important for habitability. Recent work on Mars has found that the dependence of surface temperature on elevation (surface lapse rate) converges to zero in the limit of a thin CO 2 atmosphere. However, …
View article: Why are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets
Why are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets Open
Understanding surface temperature is important for habitability. Recent work on Mars has found that the dependence of surface temperature on elevation (surface lapse rate) converges to zero in the limit of a thin CO2 atmosphere. However, t…
View article: Why are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets
Why are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets Open
Understanding surface temperature is important for habitability. Recent work on Mars has found that the dependence of surface temperature on elevation (surface lapse rate) converges to zero in the limit of a thin $\mathrm{CO_2}$ atmosphere…
View article: The emergence of a new wintertime Arctic energy balance regime
The emergence of a new wintertime Arctic energy balance regime Open
The modern Arctic climate during wintertime is characterized by sea-ice cover, a strong surface temperature inversion, and the absence of convection. Correspondingly, the energy balance in the Arctic atmosphere today is dominated by atmosp…
View article: The effect of salinity on ocean circulation and ice-ocean interaction on Enceladus
The effect of salinity on ocean circulation and ice-ocean interaction on Enceladus Open
Observational data suggest that the ice shell on Enceladus is thicker at the equator than at the pole, indicating an equator-to-pole ice flow. If the ice shell is in an equilibrium state, the mass transport of the ice flow must be balanced…
View article: Energetic Constraints on Ocean Circulations of Icy Ocean Worlds
Energetic Constraints on Ocean Circulations of Icy Ocean Worlds Open
Globally ice-covered oceans have been found on multiple moons in the solar system and may also have been a feature of Earth’s past. However, relatively little is understood about the dynamics of these ice-covered oceans, which affect not o…
View article: Parameterizing eddy form stress in a thickness-weighted average isopycnal ocean model
Parameterizing eddy form stress in a thickness-weighted average isopycnal ocean model Open
Mesoscale eddies are unresolved in most of today’s global ocean models, and their effect on the large-scale ocean circulation needs to be parameterized. Greatbatch and Lamb (1990, GL90) suggested an eddy form stress parameterization that m…
View article: Why are Mountaintops Cold? The Decorrelation of Surface Temperature and Elevation Due to the Greenhouse Effect Weakening on Early Mars
Why are Mountaintops Cold? The Decorrelation of Surface Temperature and Elevation Due to the Greenhouse Effect Weakening on Early Mars Open
\justifying The wet-to-dry transition of Mars is recorded by a changing distribution of rivers, which was interpreted as the result of a decorrelation between surface temperature and elevation with a thinner atmosphere. Here we use a clima…
View article: Diagnosing scale-dependent energy cycles in a high-resolution isopycnal ocean model
Diagnosing scale-dependent energy cycles in a high-resolution isopycnal ocean model Open
Energy exchanges between large-scale ocean currents and mesoscale eddies play an important role in setting the large-scale ocean circulation but are not fully captured in models. To better understand and quantify the ocean energy cycle, we…
View article: NeverWorld2: an idealized model hierarchy to investigate ocean mesoscale eddies across resolutions
NeverWorld2: an idealized model hierarchy to investigate ocean mesoscale eddies across resolutions Open
We describe an idealized primitive-equation model for studying mesoscale turbulence and leverage a hierarchy of grid resolutions to make eddy-resolving calculations on the finest grids more affordable. The model has intermediate complexity…
View article: On Icy Ocean Worlds, Size Controls Ice Shell Geometry
On Icy Ocean Worlds, Size Controls Ice Shell Geometry Open
The ice shell and subsurface ocean on icy worlds are strongly coupled together—heat and salinity flux from the ice shell induced by the ice thickness gradient drives circulation in the ocean, and in turn, the heat transport by ocean circul…
View article: Energetic constraints on ocean circulations of icy ocean worlds
Energetic constraints on ocean circulations of icy ocean worlds Open
Globally ice-covered oceans have been found on multiple moons in the solar system and may also have been a feature of Earth's past. However, relatively little is understood about the dynamics of these ice-covered oceans, which affect not o…
View article: The Effect of Ocean Salinity on Climate and Its Implications for Earth's Habitability
The Effect of Ocean Salinity on Climate and Its Implications for Earth's Habitability Open
The influence of atmospheric composition on the climates of present‐day and early Earth has been studied extensively, but the role of ocean composition has received less attention. We use the ROCKE‐3D ocean‐atmosphere general circulation m…
View article: Policy choices and outcomes for offshore wind auctions globally
Policy choices and outcomes for offshore wind auctions globally Open
Offshore wind energy is rapidly expanding, facilitated largely through auctions run by governments. We provide a detailed quantified overview of applied auction schemes, including geographical spread, volumes, results, and design specifica…
View article: Comment on egusphere-2022-186
Comment on egusphere-2022-186 Open
Abstract. We describe an idealized primitive equation model for studying mesoscale turbulence and leverage a hierarchy of grid resolutions to make eddy-resolving calculations on the finest grids more affordable. The model has intermediate …
View article: NeverWorld2: An idealized model hierarchy to investigate ocean mesoscale eddies across resolutions
NeverWorld2: An idealized model hierarchy to investigate ocean mesoscale eddies across resolutions Open
We describe an idealized primitive equation model for studying mesoscale turbulence and leverage a hierarchy of grid resolutions to make eddy-resolving calculations on the finest grids more affordable. The model has intermediate complexity…
View article: The global overturning circulation and the importance of non-equilibrium effects in ECCOv4r4
The global overturning circulation and the importance of non-equilibrium effects in ECCOv4r4 Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: In icy ocean worlds, size matters!
In icy ocean worlds, size matters! Open
The ice shell and subsurface ocean on icy worlds are strongly coupled together -- heat and salinity flux from the ice shell induced by the ice thickness gradient drives circulation in the ocean, and in turn, the heat transport by ocean cir…
View article: The Time-Dependent Response of a Two-Basin Ocean to a Sudden Surface Temperature Change
The Time-Dependent Response of a Two-Basin Ocean to a Sudden Surface Temperature Change Open
Building on previous work using single-basin models, we here explore the time-dependent response of the Atlantic meridional overturning circulation (AMOC) to a sudden global temperature change in a two-basin ocean–ice model. We find that t…