A5103027685- Climate variability and models
- Meteorological Phenomena and Simulations
- Distributed and Parallel Computing Systems
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Scientific Computing and Data Management
- Paleontology and Stratigraphy of Fossils
- Advanced Data Storage Technologies
- Parallel Computing and Optimization Techniques
- EEG and Brain-Computer Interfaces
- Computational Physics and Python Applications
- Geophysics and Gravity Measurements
- Tropical and Extratropical Cyclones Research
- Multiculturalism, Politics, Migration, Gender
- Medieval and Early Modern Justice
- Plant Water Relations and Carbon Dynamics
- Arctic and Antarctic ice dynamics
- Interactive and Immersive Displays
- French Urban and Social Studies
- Marine and coastal ecosystems
- Geological formations and processes
- Soil Carbon and Nitrogen Dynamics
- Climate change impacts on agriculture
Black Swamp Bird Observatory
2025
Argonne National Laboratory
2015-2024
Los Alamos National Laboratory
2022
Tufts University
2005-2017
University of Illinois Chicago
2015
University of Chicago
2000-2013
University of Cologne
2011
University College London
2011
University of Wisconsin–Madison
1992-2003
Centre National de la Recherche Scientifique
1994-2000
We conducted the first synchronously coupled atmosphere-ocean general circulation model simulation from Last Glacial Maximum to Bølling-Allerød (BA) warming. Our reproduces several major features of deglacial climate evolution, suggesting a good agreement in sensitivity between and observations. In particular, our simulates abrupt BA warming as transient response Atlantic meridional overturning (AMOC) sudden termination freshwater discharge North before BA. contrast previous mechanisms that...
This work documents the first version of U.S. Department Energy (DOE) new Exascale Earth System Model (E3SMv1). We focus on standard resolution fully coupled physical model designed to address DOE mission-relevant water cycle questions. Its components include atmosphere and land (110-km grid spacing), ocean sea ice (60 km in midlatitudes 30 at equator poles), river transport (55 km) models. base configuration will also serve as a foundation for additional configurations exploring higher...
Many problems in science and engineering are best simulated as a set of mutually interacting models, resulting coupled or multiphysics model. These models present challenges stemming from their interdisciplinary nature computational algorithmic complexities. The complexity individual combined with the popularity distributed-memory parallel programming model used on commodity micro-processor-based clusters, results coupling problem when building We define elucidate this how it requirements...
Abstract The Energy Exascale Earth System Model Atmosphere version 1, the atmospheric component of Department Energy's is described. model began as a fork well‐known Community Model, but it has evolved in new ways, and coding, performance, resolution, physical processes (primarily cloud aerosols formulations), testing development procedures now differ significantly. Vertical resolution was increased (from 30 to 72 layers), top extended 60 km (~0.1 hPa). A simple ozone photochemistry predicts...
The Community Climate System Model (CCSM) has been developed over the last decade, and it is used to understand past, present, future climates. latest versions of model, CCSM4 CESM1, contain totally new coupling capabilities in CPL7 coupler that permit additional flexibility extensibility address challenges involved earth system modeling. architecture takes a completely approach with respect high-level design system. now contains top-level driver calls model component initialize, run,...
Abstract This study provides an overview of the coupled high‐resolution Version 1 Energy Exascale Earth System Model (E3SMv1) and documents characteristics a 50‐year‐long control simulation with time‐invariant 1950 forcings following HighResMIP protocol. In terms global root‐mean‐squared error metrics, this is generally superior to results from low‐resolution configuration E3SMv1 (due resolution, tuning changes, possibly initialization procedure) compares favorably models in CMIP5 ensemble....
Abstract This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SMv2 is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid‐latitudes 30 at equator poles. The...
The Model Coupling Toolkit (MCT) is a software library for constructing parallel coupled models from individual models. MCT was created to address the challenges of creating coupler Community Climate System (CCSM). Each submodels that make up CCSM separate application with its own domain decomposition, running on set processors. This contains multiple instances M × N problem, problem transferring data between two programs disjoint sets also requires efficient transfer facilitate...
Abstract The authors describe a new approach for emulating the output of fully coupled climate model under arbitrary forcing scenarios that is based on small set precomputed runs from model. Temperature and precipitation are expressed as simple functions past trajectory atmospheric CO2 concentrations, statistical fit using limited training runs. demonstrated to be useful computationally efficient alternative pattern scaling captures nonlinear evolution spatial patterns anomalies inherent in...
Abstract. The potential impact of climate change on agriculture is uncertain. In addition, could influence above- and below-ground carbon storage. Development models that represent necessary to address these impacts. We have developed an approach integrate representations for three crop types – maize, soybean, spring wheat into the coupled carbon–nitrogen version Community Land Model (CLM), help questions. Here we present new model, CLM-Crop, validated against observations from two AmeriFlux...
Abstract This paper describes the first implementation of Δ x = 3.25 km version Energy Exascale Earth System Model (E3SM) global atmosphere model and its behavior in a 40‐day prescribed‐sea‐surface‐temperature simulation (January 20 through February 28, 2020). was performed as part DYnamics Atmospheric general circulation Modeled On Non‐hydrostatic Domains (DYAMOND) Phase 2 intercomparison. Effective resolution is found to be horizontal dynamics grid despite using coarser for physical...
This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SM 2 (E3SMv2) is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid-latitudes 30 at equator poles. The...
Pacific decadal variability is studied in a series of coupled global ocean–atmosphere simulations aided by two "modeling surgery" strategies: partial coupling (PC) and blocking (PB). The PC experiments retain full selected regions, but constrain elsewhere prescribing the model climatological SST to force atmospheric component system. In PB experiments, sponge walls are inserted into ocean at specified latitudinal bands block extratropical–tropical oceanic teleconnection. Both modeling...
A fully coupled ocean‐atmosphere general circulation model (the Fast Ocean‐Atmosphere Model) is used to simulate the Neoproterozoic climate with a reduced solar luminosity (95% of present‐day), low atmospheric CO 2 (140 ppmv), and an idealized tropical supercontinent. Two simulations were completed present‐day cold initial ocean temperatures. These experiments are compared uncoupled (i.e., mixed‐layer) determine impact dynamical on simulations. In contrast global sea‐ice coverage in...
This paper describes the Brainput system, which learns to identify brain activity patterns occurring during multitasking. It provides a continuous, supplemental input stream an interactive human-robot uses this information modify its behavior better support demonstrates that we can use non-invasive methods detect signals coming from users naturally and effortlessly generate while using computer system. If used with care, additional lead systems respond appropriately changes in user's state....
Abstract. This paper presents a review of the software currently used in climate modelling general and CMIP5 particular to couple numerical codes representing different components Earth System. The coupling technologies presented show common features, such as ability communicate regrid data, also offer functions implementations. Design characteristics approaches are discussed well future challenges arising from increasing complexity scientific problems computing platforms.
This work documents version two of the Department Energy’s Energy Exascale Earth System Model (E3SM). E3SM 2 (E3SMv2) is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid-latitudes 30 at equator poles. The...
Abstract. This paper provides an overview of the United States (US) Department Energy's (DOE's) Energy Exascale Earth System Model version 2 (E3SMv2) fully coupled regionally refined model (RRM) and documents overall atmosphere, land, river results from Coupled Intercomparison Project 6 (CMIP6) DECK (Diagnosis, Evaluation, Characterization Klima) historical simulations – a first-of-its-kind set climate production using RRM. The North American (NA) RRM (NARRM) is developed as high-resolution...
In models of the global carbon cycle, p CO 2 atmosphere is more sensitive to chemistry high‐latitude surface ocean than tropical ocean. Because sea‐surface nutrient concentrations are generally high in latitudes, sensitivity forcing also determines biological pump globally. We diagnose a range using atmospheric above an abiotic ocean; cold waters pull low values. Box very sensitive, while most circulation considerably less so, including two‐dimensional overturning model, two primitive...
Research Article| February 01, 2003 Did the rifting of Atlantic Ocean cause Cretaceous thermal maximum? Christopher J. Poulsen; Poulsen 1Department Earth Sciences, University Southern California, Los Angeles, California 90089, USA Search for other works by this author on: GSW Google Scholar Andrew S. Gendaszek; Gendaszek 2Department Geology, Carleton College, Northfield, Minnesota 55057, Robert L. Jacob 3Argonne National Laboratory, Argonne, Illinois 60439, Author and Article Information...
Coupled climate models are large, multiphysics applications designed to simulate the Earth’s and predict response of any changes in forcing or boundary conditions. The Community Climate System Model (CCSM) is a widely used state-of-the-art model that has released several versions community over past ten years. Like many models, CCSM employs coupler, functional unit coordinates exchange data between parts system such as atmosphere ocean. In this paper we describe new cpl6, contained latest...