Implementing Applications with the Earth System Modeling Framework

Hill, Chris; DeLuca, Cecelia; Balaji, V.; Suarez, M.; Silva, Arlindo da; Sawyer, William; Cruz, Carlos Alberto dos Santos; Trayanov, Atanas; Zaslavsky, Leonid; Hallberg, Robert; Boville, Byron A.; Craig, Anthony P; Collins, Nancy; Kluzek, Erik; Michalakes, John; Neckels, David; Schwab, Earl; Smithline, Shepard; Wolfe, John; Iredell, Mark; Yang, Weiyu; Jacob, Robert; Larson, Jay

doi:10.1007/11558958_67

Cited by 8 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model has shown high skills in reproducing the interannual and decadal variability of air‐sea fluxes, river runoff, SST, sea surface salinity (SSS), and the Eastern Mediterranean Transient (Sevault et al, 2014). Finally Turuncoglu and Sannino (2016) developed RegESM, an AORCM composed by RegCM4 for the atmosphere (Giorgi et al, 2012), BATS as land surface scheme (Dickinson et al, 1993), ROMS for the ocean (Haidvogel et al, 2008; Shchepetkin & McWilliams, 2005) and the ESMF coupler (Collins et al, 2005; Hill, DeLuca, Balaji, Suarez, & da Silva, 2004; Hill, De Luca, Balaji, Suarez, da Silva, et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The Regional Earth System Model RegCM‐ES: Evaluation of the Mediterranean Climate and Marine Biogeochemistry

Reale

Giorgi

Solidoro

et al. 2020

J Adv Model Earth Syst

View full text Add to dashboard Cite

We introduce a new version of the Earth System Regional Climate model RegCM‐ES and evaluate its performances for the first time over the Mediterranean region. The novel aspect of this coupled system is the possibility to simulate the dynamics of the marine ecosystem through a biogeochemical model, BFM (Biogeochemical Flux Model), coupled online with the ocean circulation model MITgcm (MIT general circulation model). The validation of atmosphere and ocean components has shown that the model is able to capture interannual and intermonthly variabilities of the atmospheric heat fluxes and spatial patterns of land surface temperature, precipitation, evaporation, and sea surface temperature with a general improvement compared to previous versions. At the same time, we diagnosed some prominent deficiencies as a warm and dry bias associated in summer with the resolution of the atmospheric module and the tuning of the boundary layer and convective precipitation scheme. On the biogeochemical side, RegCM‐ES shows good skills in reproducing mean values and spatial patterns of net primary production, phosphate, and horizontal/vertical patterns of chlorophyll‐a. Limitations in this case include deficiencies mainly in the simulation of mean values of nitrate and dissolved oxygen in the basin which have been associated with too large vertical mixing throughout the water column, deficiencies in the boundary conditions, and solubility computations. Overall, RegCM‐ES has the potential to become a suitable tool for the analysis of the impacts of climate change on the ocean and marine biogeochemistry in the Mediterranean region and many other domains.

show abstract

Section: Introductionmentioning

confidence: 99%

The Regional Earth System Model RegCM‐ES: Evaluation of the Mediterranean Climate and Marine Biogeochemistry

Reale

Giorgi

Solidoro

et al. 2020

J Adv Model Earth Syst

View full text Add to dashboard Cite

show abstract

“…The driver combines each model component by using its standardized application programming interfaces (APIs). Data exchanges and online regridding capabilities are performed by using the Earth System Modeling Framework (ESMF) [ Hill et al ., , ; Collins et al ., ] and the National United Operational Prediction Capability (NUOPC) layer. Each model component is merged using the latest version of ESMF (version 7.0.0).…”

Section: The Regcm‐es Model: Individual Components and Couplingmentioning

confidence: 99%

Description and evaluation of the Earth System Regional Climate Model (Reg CM‐ES)

Sitz

Sante

Farneti

et al. 2017

J Adv Model Earth Syst

View full text Add to dashboard Cite

We describe a new, state‐of‐the‐art, Earth System Regional Climate Model (RegCM‐ES), which includes the coupling between the atmosphere, ocean, and land surface, as well as a hydrological and ocean biogeochemistry model, with the capability of using a variety of physical parameterizations. The regional coupled model has been implemented and tested over some of the COordinated Regional climate Downscaling Experiment (CORDEX) domains and more regional settings featuring climatically important coupled phenomena. Regional coupled ocean‐atmosphere models can be especially useful tools to provide information on the mechanisms of air‐sea interactions and feedbacks occurring at fine spatial and temporal scales. RegCM‐ES shows a good representation of precipitation and SST fields over the domains tested, as well as realistic simulations of coupled air‐sea processes and interactions. The RegCM‐ES model, which can be easily implemented over any regional domain of interest, is open source, making it suitable for usage by the broad scientific community.

show abstract

“…Prominent examples of coupled modeling systems are the Community Climate System Model, CCSM (Gent, 2006), and the Earth System Modeling Framework, ESMF (Hill et al, 2006), which have also been shown to scale to processor numbers on the order of 10 4 . As a matter of fact Dennis et al (2007) explicitly discuss the application of ultra-high-resolution CCSM on the Blue Gene platform and the required preparations with regard to, for example, memory allocations and parallel I/O due to this unique supercomputer architecture.…”

Section: Introductionmentioning

confidence: 99%

Implementation and scaling of the fully coupled Terrestrial Systems Modeling Platform (TerrSysMP v1.0) in a massively parallel supercomputing environment – a case study on JUQUEEN (IBM Blue Gene/Q)

Gasper¹,

Goergen

Shrestha

et al. 2014

Geosci. Model Dev.

View full text Add to dashboard Cite

Abstract. Continental-scale hyper-resolution simulations constitute a grand challenge in characterizing nonlinear feedbacks of states and fluxes of the coupled water, energy, and biogeochemical cycles of terrestrial systems. Tackling this challenge requires advanced coupling and supercomputing technologies for earth system models that are discussed in this study, utilizing the example of the implementation of the newly developed Terrestrial Systems Modeling Platform (TerrSysMP v1.0) on JUQUEEN (IBM Blue Gene/Q) of the Jülich Supercomputing Centre, Germany. The applied coupling strategies rely on the Multiple Program Multiple Data (MPMD) paradigm using the OASIS suite of external couplers, and require memory and load balancing considerations in the exchange of the coupling fields between different component models and the allocation of computational resources, respectively. Using the advanced profiling and tracing tool Scalasca to determine an optimum load balancing leads to a 19 % speedup. In massively parallel supercomputer environments, the coupler OASIS-MCT is recommended, which resolves memory limitations that may be significant in case of very large computational domains and exchange fields as they occur in these specific test cases and in many applications in terrestrial research. However, model I/O and initialization in the petascale range still require major attention, as they constitute true big data challenges in light of future exascale computing resources. Based on a factor-two speedup due to compiler optimizations, a refactored coupling interface using OASIS-MCT and an optimum load balancing, the problem size in a weak scaling study can be increased by a factor of 64 from 512 to 32 768 processes while maintaining parallel efficiencies above 80 % for the component models.

show abstract

Implementing Applications with the Earth System Modeling Framework

Cited by 8 publications

References 7 publications

The Regional Earth System Model RegCM‐ES: Evaluation of the Mediterranean Climate and Marine Biogeochemistry

The Regional Earth System Model RegCM‐ES: Evaluation of the Mediterranean Climate and Marine Biogeochemistry

Description and evaluation of the Earth System Regional Climate Model (Reg CM‐ES)

Implementation and scaling of the fully coupled Terrestrial Systems Modeling Platform (TerrSysMP v1.0) in a massively parallel supercomputing environment – a case study on JUQUEEN (IBM Blue Gene/Q)

Contact Info

Product

Resources

About