A5004421588- Climate variability and models
- Oceanographic and Atmospheric Processes
- Arctic and Antarctic ice dynamics
- Fluid Dynamics and Heat Transfer
- Particle Dynamics in Fluid Flows
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Fluid Dynamics and Mixing
- Combustion and flame dynamics
- Electrohydrodynamics and Fluid Dynamics
- Marine and coastal ecosystems
- Advanced Combustion Engine Technologies
- Surface Modification and Superhydrophobicity
- Atmospheric Ozone and Climate
- Climate change and permafrost
- Geophysics and Gravity Measurements
- Cryospheric studies and observations
- Fire dynamics and safety research
- Tropical and Extratropical Cyclones Research
- Thermochemical Biomass Conversion Processes
- Methane Hydrates and Related Phenomena
- Plasma and Flow Control in Aerodynamics
- Atmospheric chemistry and aerosols
- Fluid Dynamics and Turbulent Flows
Goddard Institute for Space Studies
2009-2022
Planetary Science Institute
2010
Jet Propulsion Laboratory
2008
Sorbonne Université
2005
California Institute of Technology
2005
This paper describes the GISS-E2.1 contribution to Coupled Model Intercomparison Project, Phase 6 (CMIP6). model version differs from predecessor (GISS-E2) chiefly due parameterization improvements atmospheric and ocean components, while keeping resolution same. skill when compared modern era climatologies is significantly higher than in previous versions. Additionally, updates forcings have a material impact on results. In particular, there been specific representations of modes variability...
Abstract Simulations of the CMIP6 historical period 1850–2014, characterized by emergence anthropogenic climate drivers like greenhouse gases, are presented for different configurations NASA Goddard Institute Space Studies (GISS) Earth System ModelE2.1. The GISS‐E2.1 ensembles more sensitive to gas forcing than their CMIP5 predecessors (GISS‐E2) but warm less during recent decades due a reduction that is attributed greater longwave opacity in pre‐industrial simulations. This results an...
Abstract This paper presents the response to anthropogenic forcing in GISS‐E2.1 climate models for 21st century Shared Socioeconomic Pathways emission scenarios within Coupled Model Intercomparison Project Phase 6 (CMIP6). The experiments were performed using an updated and improved version of NASA Goddard Institute Space Studies (GISS) coupled general circulation model that includes two different versions atmospheric composition: A non‐interactive (NINT) with prescribed composition a tuned...
A multiple-stream radiative transfer scheme for sea ice suitable GCM applications is introduced. The algorithm explicitly considers the refraction at air-ice and air-water interfaces multiple scattering by inclusions entrapped in ice, such as brine pockets air bubbles. integrated volumes are derived from physical properties (salinity, density temperature) based on phase equilibrium relationships. Thus, optical represented a function of its properties, which used input variables computations....
Abstract. We present the second generation of ROCKE-3D (Resolving Orbital and Climate Keys Earth Extraterrestrial Environments with Dynamics), a generalized 3-dimensional General Circulation Model (GCM) for use in Solar System exoplanetary simulations rocky planet climates. version 2.0 is descendant ModelE2.1, flagship NASA Goddard Institute Space Studies (GISS) used most recent Intergovernmental Panel Change (IPCC) assessments. continuous effort to expand capabilities GISS ModelE handle...
Large-eddy simulation (LES) is conducted of a three-dimensional temporal mixing layer whose lower stream initially laden with liquid drops which may evaporate during the simulation. The gas-phase equations are written in an Eulerian frame for two perfect gas species (carrier and vapour emanating from drops), while liquid-phase Lagrangian frame. effect drop evaporation on phase considered through mass, species, momentum energy source terms. evolution modelled using physical drops, or...
Results are compared from direct numerical simulation (DNS) and large eddy (LES) of a temporal mixing layer laden with evaporating drops to assess the ability LES reproduce detailed characteristics DNS. The used computational drops, each which represented eight physical reduced flow field resolution using grid spacing four times larger than that also models for filtered source terms, express coupling flow, unresolved subgrid-scale (SGS) fluxes species mass, momentum, enthalpy. LESs were...
In this paper a quasi-direct solution of transient three-dimensional CFD calculations based on finite volume approach has been adopted to simulate the atomization process high velocity liquid jets issuing an injector-like nozzle. An accurate Volume-of-Fluid (VOF) method is used reconstruct and advect interface between gas phases. extended mesh which includes injector nozzle upstream plenum considered in order investigate accurately effect flow conditions jet atomization. Cavitation modeling...
Abstract In 2011, Chelton et al. carried out a comprehensive census of mesoscales using altimetry data and reached the following conclusions: “essentially all observed mesoscale features are nonlinear” “mesoscales do not move with mean velocity but their own drift velocity,” which is “the most germane nonlinear metrics.” Accounting for these results in parameterization presents conceptual practical challenges since linear analysis no longer usable one needs model nonlinearity. A presented...
Abstract. We derive and assess a parameterization of the mixed layer vertical horizontal mesoscale fluxes an arbitrary tracer. The results, which are obtained by solving dynamic equations contain no adjustable parameters, expressed in terms large scale fields resolved coarse resolution OGCMs (ocean global circulation models). new model can be put right perspective considering following. Thus far, lack that naturally satisfies required boundary condition (the flux must vanish at surface), was...
Results have been compared from Direct Numerical Simulation (DNS) and Large Eddy (LES) of a temporal mixing layer laden with evaporating drops, to assess the ability LES reproduce detailed characteristics DNS.
We present a model for mixed layer (ML) mesoscale (M) fluxes of an arbitrary tracer in terms the resolved fields (mean and mean velocity). The treatment tracer, rather than only buoyancy, is necessary since OGCMs time step T, S, CO2, etc not buoyancy. particular case buoyancy used to assess results. paper contains three parts: derivation results, discussion results assessment latter using, among others, WOCE, T/P Drifter data. Derivation. To construct M fluxes, we first solve ML dynamic...
LES of a circular jet laden with evaporating liquid drops are conducted to assess computational-drop modeling and three different SGS-flux models: the Scale Similarity model (SSC), using constant coefficient calibrated on temporal mixing layer DNS database, dynamic-coefficient Gradient Smagorinsky models.