Journal metrics

Journal metrics

  • IF value: 4.252 IF 4.252
  • IF 5-year value: 4.890 IF 5-year 4.890
  • CiteScore value: 4.49 CiteScore 4.49
  • SNIP value: 1.539 SNIP 1.539
  • SJR value: 2.404 SJR 2.404
  • IPP value: 4.28 IPP 4.28
  • h5-index value: 40 h5-index 40
  • Scimago H index value: 51 Scimago H index 51

Scheduled special issues

The following special issues are scheduled for publication in GMD:

The PALM model system 6.0 for atmospheric and oceanic boundary-layer flows: model description and applications in urban environments
05 Oct 2018–31 May 2019 | Coordinator: B. Maronga | Papers are handled by GMD topical editors | Information

In 2016, the German research programme "Urban Climate Under Change [UC]2" was launched by the German Federal Ministry of Education and Research. The major goal of this programme has been the development of a new urban climate model that allows simulations that are building-resolving for entire cities and that cover an area of up to 2000 km2. In this framework, the established open-source large-eddy simulation model PALM (at version 4.0) was chosen as the model core, and missing components relevant to simulate urban boundary layers and thus urban climate have been added and now form the new PALM model system. The PALM model system now consists of PALM and new components for urban applications, which are referred to as PALM-4U components. This special issue covers the model description of the PALM model system, i.e. PALM (version 6.0) including PALM-4U components as well as the description of first numerical experiments conducted with the PALM-4U components, including evaluations against wind tunnel and field observations.

CMIP6 HighResMIP model descriptions and basic properties
24 Sep 2018–30 Mar 2020 | Coordinator: M. Roberts | Papers are handled by GMD topical editors | Information

HighResMIP is a new protocol for the Coupled Model Intercomparison Project Phase 6 (CMIP6) with the aim of furthering our understanding of model bias through horizontal resolution changes. It specifies an experimental setup which constrains models to be more comparable through simplified forcing and using only the physical aspects of climate models. This enables a cleaner comparison of the impact of model horizontal resolution on simulation performance, with each model being run at two resolutions: one typical of CMIP6 DECK simulations, and one towards 25 km resolution (atmosphere and ocean). The special issue will bring together comparable model descriptions, as well as describing the implementation of the HighResMIP protocol and assessing its strengths and weaknesses.

Air Quality Research at Street-Level (ACP/GMD inter-journal SI)
01 Sep 2018–01 Sep 2021 | Coordinator: Y. Zhang | Papers are handled by GMD topical editors | Information

Rapid population growth and urbanisation worldwide accelerate eco-environmental/socio-economic stress as well as adverse climatic and health impacts on urban dwellers. Atmospheric modelling research has largely been performed on a horizontal grid spacing of kilometres or larger due to a lack of understanding of the local-scale phenomena, appropriate parameterisations, and adequate modelling tools, and computer resources. Urban/local street-level air pollution, climate change, and their impacts on population exposure and human health have increasingly received attentions by both researchers and policymakers around the world. Several state-of-the-science models have been recently developed for urban/local street-level air pollution modelling, including the street-network model, the Model of Urban Network of Intersecting Canyons and Highways (MUNICH) that incorporates detailed representations of gas-phase chemistry and secondary aerosol formation pathways, and the Street-in-Grid model (SinG) that dynamically combines a 3-D Eulerian chemical-transport model (CTM), Polair3D, with MUNICH. There have been increasing numbers of developers and users for MUNICH, SinG, and other similar coupled 3-D CTMs and urban canyon models for street-level air pollution modelling worldwide. Recognising the urgent need for scientific advancement, pollution/exposure assessment, policymaking, and public health protection at urban/local-street scales, we launch this special issue to advance scientific understanding of local-scale atmospheric phenomena and promote research and discussion on state-of-the-science urban/local-street-level air quality model development and application for complex interactions among urban air pollution, climate, and health. The special issue is open for all submissions which address the following themes:

  • 3-D Street-in-Grid (SinG) model development and application;
  • urban canyon/network model development and its incorporation into 3-D CTMs;
  • urban/street-level air quality modelling in support of human exposure assessment;
  • impact of urban traffic emissions on air quality and human health at a street level.

The Canadian Earth System Model version 5
01 Oct 2018–indefinite | Coordinator: N. C. Swart | Papers are handled by GMD topical editors | Information

The Canadian Earth System Model, CanESM, is a global coupled Earth System Model designed to simulate climate variability and change on timescales from seasons to centuries. CanESM is developed at the Canadian Centre for Climate Modelling and Analysis (CCCma), Environment and Climate Change Canada, with inputs from other government and university stakeholders. A significant update to the model, CanESM5, has been developed for inclusion in the upcoming Coupled Model Intercomparison Project Phase 6. Beyond CMIP6, the new version of the model will provide an updated tool for climate science applications at CCCma and within Canada and will be submitted for possible integration into the operational Canadian Seasonal to Interseasonal Prediction System (CanSIPS). CanESM5 consists of the Canadian atmospheric model (CanAM) with an embedded land surface scheme and terrestrial biogeochemistry (CLASS-CTEM) and an off-the-shelf but customized ocean model (CanNEMO), which includes sea-ice and Canadian-developed ocean biogeochemistry modules (CMOC and CanOE). The components communicate through a new custom coupler, CanCPL. This special issue hosts the documentation and model evaluation papers for CanESM5.

Hydrological cycle in the Mediterranean (ACP/AMT/GMD/HESS/NHESS/OS inter-journal SI)
01 Apr 2018–31 Dec 2021 | Coordinator: V. Ducrocq | Papers are handled by GMD topical editors | Information

The Hydrological cycle in the Mediterranean Experiment (HyMeX, programme is a 10-year concerted effort at the international level started in 2010 with aims to advance the understanding of the water cycle, and with emphases on the predictability and evolution of high-impact weather events, as well as on evaluating social vulnerability to these extreme events. The special issue is jointly organized between the Atmospheric Chemistry and Physics, Hydrology and Earth System Sciences, Ocean Science, Natural Hazards and Earth System Sciences, Atmospheric Measurement Techniques, and Geoscientific Model Development journals. It aims at gathering contributions to the areas of understanding, modelling, and predicting at various timescales and spatial scales of the Mediterranean water cycle and its related extreme events, including cyclones, heavy precipitation, flash floods and impacts, drought and water resources, strong winds, and dense water formation. The special issue is not limited to studies conducted within HyMeX: any multiscale or multidisciplinary approaches related to the Mediterranean water cycle are encouraged.

Modelling lakes in the climate system (GMD/HESS inter-journal SI)
20 Nov 2017–22 Oct 2018 | Coordinator: W. Thiery | Papers are handled by GMD topical editors | Information

The aim of the special issue is to present new methods of handling lakes in the numerical weather prediction and climate models, and to use these methods to investigate two-way interactions between lakes and the atmosphere in a changing climate. The special issue will bring together specialists in several geophysical disciplines – climate research, boundary-layer meteorology, limnology, biogeochemistry, cryosphere research – focusing on lake-related processes. As an outcome, a significant advance is expected in our understanding of the role played by lake systems in atmosphere-hydrosphere interactions. The special issue arises from the "5th workshop on the parameterisation of lakes in numerical weather prediction and climate models", which was held from 16 to 19 October 2017 in Berlin. However, while the special issue was conceived during this meeting, it will not merely be a conference proceeding, but will instead aim to embody the most important advances within our research field during the past few years. The special issue will therefore be open for all submissions within its scope.

BACCHUS – Impact of Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding (ACP/AMT/GMD inter-journal SI)
14 Jun 2017–31 Dec 2018 | Coordinator: U. Lohmann | Papers are handled by GMD topical editors | Information

BACCHUS is a European FP7 Collaborative Project aiming at quantifying key processes and feedbacks that control aerosol–cloud interactions by combining advanced measurement techniques of cloud and aerosol properties with emphasis on ice nucleating particles and the ice phase in clouds with state-of-the-art numerical modelling. It investigates the importance of biogenic versus anthropogenic emissions for aerosol–cloud interactions in regions that are key regulators of Earth's climate (Amazonian rainforest) or are regarded as tipping elements in the climate system (Arctic). BACCHUS advances the understanding of biosphere aerosol–cloud–climate feedbacks that occur via emission and transformation of biogenic volatile organic compounds, primary biological aerosols, secondary organic aerosols, and dust. New fundamental understanding gained during BACCHUS will be incorporated into Earth system models through new or improved parameterizations of emissions, aerosol and cloud processes, and properties, which will lead to a reduction in the uncertainty of future climate projections. A unique database linking long-term observations and field campaign data of ice nucleating particles and observed cloud microphysical properties has been generated.

The BACCHUS special issue will be simultaneously presented in the ACP, AMT, and GMD journals and is open for all submissions acknowledging the BACCHUS project. BACCHUS is a collaborative project of 21 partner institutions: ETH Zurich, University of Helsinki, Paul Scherrer Institute, Max Planck Society (MPI-M, MPI-C), University of Oxford, University of Oslo, Finnish Meteorological Institute, University of Leeds, University of Manchester, Leibniz Institute for Tropospheric Research, Goethe University Frankfurt, the University of Crete, National Research Council of Italy – Institute of Atmospheric Sciences and Climate, National University of Ireland Galway, Institute for Nuclear Research and Nuclear Energy, Hebrew University of Jerusalem, National Center for Scientific Research (France), Karlsruhe Institute of Technology, Cyprus Institute, Cyprus University of Technology, and University of Gothenburg. The project is funded by the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 603445.

The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP) (ESD/ACP/CP/GMD inter-journal SI)
15 May 2017–30 Apr 2019 | Coordinators: C. Timmreck, M. Khodri, and D. Zanchettin | Papers are handled by GMD topical editors | Information

Volcanic eruptions are one of the major natural factors influencing climate variability at interannual to multidecadal timescales. However, simulating volcanically forced climate variability is a challenging task for climate models and one of the major uncertainties in near-term climate predictions. The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP) is an endorsed contribution to the sixth phase of the Coupled Model Intercomparison Project. This multi-journal special issue on VolMIP aims at collecting relevant research results obtained within the VolMIP framework, and specifically concerning different aspects of the radiative and dynamical climatic response to volcanic forcing, detailed description of effects of different implementation of volcanic forcing in current climate models, aspects concerning the dynamical and chemical atmospheric response to volcanic aerosols simulated by global aerosol models, and comparison between reconstructed and simulated climate evolution after major eruptions. Articles in the special issue should contain the following statement: "This article is part of the special issue "The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP) (ESD/GMD/ACP/CP inter-journal SI)". It does not belong to a conference."

The Transport Matrix Method (TMM) for ocean biogeochemical simulations
15 Feb 2017–indefinite | Coordinator: S. Khatiwala | Papers are handled by GMD topical editors | Information

Scope: The Transport Matrix Method (TMM) is a computationally efficient "offline" scheme for simulation of ocean biogeochemical tracers. The TMM essentially encapsulates the circulation of any ocean model, including sub-grid-scale parameterizations, as a sparse matrix, and advection-diffusion as a sequence of sparse matrix-vector products that can be efficiently carried out on modern distributed-memory computers. Simulations carried out with the TMM can potentially be orders of magnitude faster than the underlying ocean circulation model. The flexible architecture of the TMM framework also allows "mixing and matching" of circulations and biogeochemical models. The TMM code, various biogeochemical models, and transport matrices from different ocean models are freely available to download from

The aim of this Special Issue is to bring together under one roof papers using the TMM as the underlying simulation method. This can range from manuscripts documenting various technical aspects of the TMM framework to those describing new biogeochemical models/parameterizations and their application.

Paleoclimate Modelling Intercomparison Project phase 4 (PMIP4) (CP/GMD inter-journal SI)
10 Jan 2017–31 Dec 2018 | Coordinator: M. Kageyama | Papers are handled by GMD topical editors | Information

The Paleoclimate Modelling Intercomparison Project (PMIP) has been set up to provide a mechanism for coordinating paleoclimate modelling and model evaluation activities, to understand the mechanisms of climate change and the role of climate feedbacks in these changes. PMIP is now in its fourth phase: PMIP4. Five PMIP4 experiments have been proposed within the framework of the CMIP6 exercise. Other periods and sensitivity experiments are also planned to assess climate sensitivity, changes in hydrology, long-term trends and interannual to millennium variability. This special issue is devoted to the description of the design of the PMIP4 experiments, of data syntheses to which model results can be compared, and to papers analysing single or multi-model results from PMIP4 and CMIP6 experiments. Papers can either be submitted to GMD (model and simulation descriptions, data syntheses in support of the experimental design or of model-data comparisons) or CP (in-depth analyses, multi-model analyses, model-data comparisons).

The Lagrangian particle dispersion model FLEXPART
25 Oct 2016–indefinite | Coordinator: I. Pisso | Papers are handled by GMD topical editors | Information

The Lagrangian particle dispersion model FLEXPART was originally designed for calculating the long-range and mesoscale dispersion of air pollutants from point sources, such as after an accident in a nuclear power plant. The model has now evolved into a comprehensive tool for atmospheric transport modelling and analysis. Its application fields are extended to a range of atmospheric transport processes for both atmospheric gases and aerosols, e.g. greenhouse gases, ozone depletion substances, short-lived climate forces like black carbon, volcanic ash and gases as well as studies of the water cycle. It supports ECMWF, NCEP, mesoscale (WRF) and climate (NorESM, CAM) wind fields in both forward and backwards modes. FLEXTPART is open source (

JULES-crop: a parameterisation of crops in the JULES land surface model
19 Oct 2016–indefinite | Coordinator: K. Williams | Papers are handled by GMD topical editors | Information

The Joint UK Land Environment Simulator (JULES) is a process-based, community model that simulates the fluxes of carbon, water, energy and momentum between the land surface and the atmosphere. JULES-crop is a parameterisation of crops within JULES which was developed with the dual aim of being able to simulate the impact of weather and climate on crop productivity and the impact that croplands have on weather and climate. This ongoing special issue collects together papers on model development, evaluation and application of JULES-crop.

Chemistry–Climate Modelling Initiative (CCMI) (ACP/AMT/ESSD/GMD inter-journal SI)
23 Oct 2015–30 Sep 2019 | Papers are handled by GMD topical editors | Information

IGAC/SPARC CCMI ( consists of a wide range of researchers, including chemistry-climate modelers, observationalists, and data analysts who are investigating the historical and projected evolution of stratospheric and tropospheric composition and chemistry, including the links between those domains, and the feedbacks with the physical climate. A current CCMI activity is a series of hindcast model simulations in support of upcoming ozone and climate assessments. The goal is to quantify how well the models can reproduce the past behavior (climatology, trends and interannual variability) of tropospheric and stratospheric ozone, other oxidants, and more generally chemistry-climate interactions, as well as to understand processes that govern these interactions. An emphasis is placed on observational based evaluation of model output, including model processes. A future CCMI activity will be to analyze projections of the future evolution of tropospheric and stratospheric ozone.

Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5) (ACP/AMT/GI/GMD inter-journal SI)
01 Jun 2015–31 May 2020 | Papers are handled by GMD topical editors | Information

Observations and modelling of the Green Ocean Amazon (GoAmazon2014/5): the GoAmazon2014/5 campaign sought to quantify and understand how aerosol and cloud life cycles in a particularly clean background in the tropics were influenced by pollutant outflow from a large tropical city. The project addressed the susceptibility of cloud–aerosol–precipitation interactions to present-day and future pollution in the tropics. The experiment took place in central Amazonia from 1 January 2014 to 31 December 2015, including intensive operating periods and aircraft in the wet and dry seasons of 2014.

Model infrastructure integration and interoperability (MI3)
01 Jan 2015–indefinite | Coordinator: R. Dunlap | Papers are handled by GMD topical editors | Information

Geoscience model infrastructure provides architecture and services for building physics-based numerical models and combining multiple models into a coupled system. Examples of model infrastructure are software libraries and frameworks that provide data structures and functions for parallel data transfer and grid interpolation, define a common interface for model components, manage a model's control flow, abstract details of parallel programming, or provide supporting capabilities such as configuration management and file I/O. The special issue of GMD is dedicated to exploring all aspects of model infrastructure integration and interoperability. Model infrastructure integration is the software engineering process of adopting an infrastructure package into a numerical model's codebase, to address new scientific requirements, enable interoperability with other models, or to improve a model's performance. Model infrastructure interoperability is required whenever multiple infrastructure packages must interact in some way in a coupled system, for example, to couple model components that originate from different scientific communities into a single cohesive system. Topics of interest for this issue include but are not limited to the following: the design and implementation of geoscience model infrastructure software; experience reports on integrating infrastructure into models; modelling systems that span scientific communities; framework interoperability, metadata and semantic mediation; performance on emerging hardware platforms; configuration and build management; and tools that support infrastructure integration, code refactoring, verification, or debugging.

The SimSphere Land Biosphere Model
01 Feb 2015–indefinite | Coordinator: G. P. Petropoulos | Papers are handled by GMD topical editors | Information

SimSphere is a one-dimensional soil–vegetation–atmosphere transfer model devoted to the study of land surface interactions of the Earth's system. Since its early development, the model has become highly variable in its application use.

Apart from its use as an educational tool at several universities worldwide, SimSphere is used in a number of research studies related to the examination of hypothetical scenarios examining land surface processes and feedbacks. It is also used synergistically with Earth observation (EO) data to retrieve spatiotemporal estimates of energy fluxes and surface soil moisture, involving exploration studies on the development of related operational products.

This special issue hosts contributions concerned with descriptions of further upgrades of SimSphere or its exploitation in any way. It comprises articles on model developments or applications involving the model; this includes – but is not limited to – studies exploring hypothetical scenario examination, model validation, sensitivity analysis and synergies of it with EO data.

Coupled Model Intercomparison Project Phase 6 (CMIP6) – Experimental Design and Organization
01 Dec 2015–31 Dec 2018 | Coordinator: V. Eyring | Papers are handled by GMD topical editors | Information

The Coupled Model Intercomparison Project (CMIP) has been a major, very successful endeavor of the climate community for understanding past climate changes and for making projections and uncertainty estimates of the future in a multi-model framework. CMIP has developed in phases, with the simulations of the fifth phase, CMIP5, mostly completed. This special issue describes the new design and organization of CMIP and the suite of experiments of its next phase (i.e., CMIP6) in a series of invited contributions. The description of the experiments and forcing data sets presented here define CMIP6 in detail. The papers provide the required information to produce a consistent set of climate model simulations that can be scientifically exploited to address the three broad scientific questions of CMIP6: (1) How does the Earth system respond to forcing?, (2) What are the origins and consequences of systematic model biases?, and (3) How can we assess future climate changes given climate variability, predictability and uncertainties in scenarios? The special issue will include an overview paper on the CMIP6 design and organization, contributions from CMIP6-endorsed MIPs and descriptions of the forcing data sets.

The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal SI)
08 Oct 2014–indefinite | Coordinator: P. Jöckel | Papers are handled by GMD topical editors | Information

The Modular Earth Submodel System (MESSy) is a multi-institutional project providing a strategy and the software for developing Earth System Models (ESMs) with highly flexible complexity.

The strategy follows a bottom-up approach, meaning that the various processes and diagnostic tools are implemented as so-called submodels, which are technically independent of each other and strictly separated from the underlying technical model infrastructure, such as memory management, input/output, flow-control, etc.

The MESSy software provides generalized interfaces for the standardized control and interconnection (coupling) of these submodels.

The present time-unlimited Special Issue hosts scientific and technical documentation and evaluation manuscripts concerned with the Modular Earth Submodel System and the models build upon it. Moreover, it comprises manuscripts about scientific applications involving these models.

The Geoengineering Model Intercomparison Project (GeoMIP): Simulations of solar radiation reduction methods (ACP/GMD inter-journal SI)
02 Oct 2014–31 Mar 2018 | Coordinator: U. Lohmann, N. Vaughan, L. M. Russell, B. Kravitz, and H. Wang | Papers are handled by GMD topical editors | Information

The Geoengineering Model Intercomparison Project (GeoMIP) has been highly successful in identifying robust climate model response to various geoengineering scenarios. There are currently seven core GeoMIP simulations, with another four submitted as GeoMIP's contribution to CMIP6. These experiments evaluate model response to various forms of geoengineering, focusing on solar dimming, stratospheric sulfate aerosol injections, marine cloud brightening via sea spray, and cirrus cloud thinning. In this special issue, we examine results from these simulations that have been conducted by 15 climate modeling centers from around the world. The results presented here provide a key source of information about the range of potential climate effects from geoengineering, any possible unintended side effects that geoengineering may cause, and the efficacy of geoengineering as a response to climate change. These simulations also reveal fundamental climate responses to radiative forcing, illuminating various feedback processes and interactions between different components of climate models.

The community version of the Weather Research and Forecasting Model as it is coupled with Chemistry (WRF-Chem)
(GMD/ACP inter-journal SI)

20 Dec 2013–31 Dec 2018 | Coordinator: G. Grell | Papers are handled by GMD topical editors | Information

The Weather Research and Forecast community modelling system coupled with Chemistry (WRF-Chem) provides the capability to simulate and forecast weather, trace gases, and aerosols from hemispheric to urban scales. WRF-Chem is a community model. WRF-Chem is an online modelling system which includes the treatment of the aerosol direct and indirect effect. It incorporates many choices for gas phase chemistry and aerosols with degrees of complexity that are suitable for forecasting and research applications. Due to its versatility WRF-Chem is attracting a large user and developer community world-wide. The present time-unlimited Special Issue hosts scientific technical documentation and evaluation manuscripts concerned with the community version of WRF-Chem.

GA/GL: Description of the Met Office Unified Model Global Atmosphere and JULES Global Land configurations
20 Nov 2013–indefinite | Coordinator: D. Walters | Papers are handled by GMD topical editors | Information

This special issue groups together documentation papers for successive releases of the Met Office Unified Model (UM) Global Atmosphere (GA) and JULES Global Land (GL) configurations. GA and GL are science configurations of the UM and JULES developed for use across weather prediction and climate research timescales. Each paper presents a scientific description of the latest configuration, a fuller description of incremental changes since the previous configuration and a brief summary of their performance.

Nucleus for European Modelling of the Ocean – NEMO
15 Nov 2013–indefinite | Coordinator: P. Oddo | Papers are handled by GMD topical editors | Information

NEMO (Nucleus for European Modelling of the Ocean) is a state-of-the-art modelling framework for oceanographic research, operational oceanography seasonal forecast and climate studies. The NEMO components are NEMO-OPA (the "blue" ocean, modelling the ocean dynamics and solving the primitive equations); NEMO-LIM (the "white ocean" for modelling sea-ice), and NEMO-TOP (the "green ocean" for modelling biogeochemistry). NEMO also includes grid refinement software (AGRIF) and an assimilation component (linear-tangent NEMO-TAM, Observational operators NEMO-OBS, and increment NEMO-ASM). The "blue ocean" component is fundamental to all users. NEMO can also be interfaced to a number of other components such as atmosphere models or alternative other models of sea-ice or biogeochemistry, to enable Earth system modelling.

This Special Issue aims to collect technical and scientific manuscripts dealing with evaluation of model skill and performance as well as development of NEMO components. Submitted manuscripts can cover a wide variety of topics, including process studies, new parameterizations, implementation of new model features and new NEMO configurations. The main scope is to collect relevant and state of the art manuscripts to provide the NEMO users with a single portal to search, discover and understand about the NEMO modelling framework potential and evolution and submit their contributions.

The iLOVECLIM earth system model
01 Jan 2013–indefinite | Coordinator: D. Roche | Papers are handled by GMD topical editors | Information

iLOVECLIM is an intermediate complexity fully coupled climate earth system model that aims at computation and understanding of the climate system on millennial timescale. It is a code fork from the LOVECLIM climate model version 1.2. From its forerunner, iLOVECLIM retains only the physical climate components (atmosphere – ocean – terrestrial vegetation modules). It is developed further to progressively include the components necessary for multi-millenia palaeoclimate and future climate experiments. As such, iLOVECLIM is a tool designed to enhance the integration of model simulations and (palaeo-)data, with an emphasis on the simulation of isotopic tracers throughout all components of the climate system, as indicated by the i prefix. The present, time unlimited, Special Issue hosts the technical documentation of the current version of iLOVECLIM as well as model evaluation manuscripts.

The Norwegian Earth System Model: NorESM; basic development, validation, scientific analyses, and climate scenarios
09 Aug 2012–indefinite | Coordinators: M. Bentsen and M. Schulz | Papers are handled by GMD topical editors | Information

The Norwegian Earth System Model (NorESM) is a global, coupled model system for the physical climate system, which can be run with various degrees of interactions with biogeochemical processes in the earth system. NorESM is developed as a nationally coordinated effort in Norway, but important parts of the model code are imported from the Community Climate System Model (CCSM) and Community Earth System Model (CESM) projects operated at NCAR on behalf of UCAR in the USA.

The NorESM publications in this special issue address a range of NorESM versions. The first set of model versions delivered results to CMIP5. NorESM1-M is run concentration-driven for greenhouse gases (GHGs) and is based on CCSM4 (released 1 April 2010), while NorESM1-ME can be run emission-driven for GHGs and is based on CESM1 (released 1 July 2010). A low-resolution version, NorESM1-L, was developed mainly for paleo-climate simulations. New versions of NorESM are underway: NorESM1.X, where X indicates updates of the NorESM1 versions, and NorESM2, which is intended to contribute to CMIP6. Further versions will follow thereafter. NorESM includes the following: its own developed code for chemistry–aerosol–cloud–radiation interactions (CAM-Oslo) and enhancements of the dynamics/physics of the atmospheric module; alternative parameterization of surface turbulent fluxes; an isopycnic coordinate ocean model originating from the Miami Isopycnic Coordinate Ocean Model (MICOM) but developed further; and the HAMburg Ocean Carbon Cycle (HAMOCC) model developed at the Max Plank Institute for Meteorology, Hamburg and adapted to the isopycnic coordinate ocean model framework.

Papers developed for full validation (CMIP-DECK) or more specific evaluation of the NorESM versions and further developments of these are welcome in this special issue. Authors intending to contribute papers to this special issue should contact the coordinators (Mats Bentsen and Michael Schulz), e.g., to ensure the consistency of version names and numbers.

Community software to support the delivery of CMIP5
10 Oct 2011–indefinite | Coordinator: S. Easterbrook | Papers are handled by GMD topical editors | Information

CMIP5 represents the most ambitious and computer-intensive model inter-comparison project ever attempted. Integrating a new generation of Earth system models and sharing the model results with a broad community has brought with it many significant technical challenges, along with new community-wide efforts to provide the necessary software infrastructure. This special issue will focus on the software that supports the scientific enterprise for CMIP5, including: couplers and coupling frameworks for Earth system models; the Common Information Model and Controlled Vocabulary for describing models and data; The development of the Earth System Grid Federation; the development of new portals for providing data access to different end-user communities; the scholarly publishing of datasets, and studies of the software development and testing processes used for the CMIP5 models. We especially welcome papers that offer comparative studies of the software approaches taken by different groups, and lessons learnt from community efforts to create shareable software components and frameworks.

Climate model simulations of the last millennium
15 Sep 2011–indefinite | Coordinator: G. A. Schmidt | Papers are handled by GMD topical editors | Information

The climate record of the last millennium holds much promise for identifying the links between forcings and responses at the global, hemispheric and regional scale. The specifications for the Paleoclimate Model Intercomparison Project (PMIP) and the Coupled Model Intercomparison Project (CMIP) simulations include controlled experiments for the period 850 to 1850 CE. The implementation of those experiments, the collation and development of the climate drivers over this period, and the assessment of the model responses are the focus of this special issue of Geoscientific Model Development.

The CSIRO Mk3L climate system model
24 Jun 2011–indefinite | Coordinator: S. Phipps | Papers are handled by GMD topical editors | Information

The CSIRO Mk3L climate system model is a computationally-efficient coupled general circulation model, designed primarily for the study of climate variability and change on millennial timescales. The model distribution is freely available to the research community. This Special Issue allows the history and evolution of Mk3L to be comprehensively documented within a single issue of a journal. Papers are welcome which describe and evaluate components of the model, and which describe and evaluate subsequent enhancements to the modelling system. The issue is also intended for papers which document specific experiments, particularly those which contribute towards Model Intercomparison Projects.

The externalised surface model SURFEX
27 Jan 2011–indefinite | Coordinator: P. Le Moigne | Papers are handled by GMD topical editors

The FAMOUS climate model
28 Jul 2008–indefinite | Coordinator: R. Smith | Papers are handled by GMD topical editors | Information

FAMOUS is climate model based on the widely-used "HadCM3" atmosphere-ocean general circulation code, a version of the UK Met Office Unified Model. Run at a lower resolution than HadCM3 its computational requirements make it suitable for large ensembles and millennial-scale climate simulations. This ongoing Special Issue collects technical documentation and evaluations of the model climatology as FAMOUS is developed and coupled to models of other Earth system components.

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