Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union

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  • IPP value: 4.021 IPP 4.021
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GMD cover
Executive editors:

Geoscientific Model Development (GMD) is an international scientific journal dedicated to the publication and public discussion of the description, development, and evaluation of numerical models of the Earth system and its components. The following manuscript types can be considered for peer-reviewed publication:

  • geoscientific model descriptions, from box models to GCMs;
  • development and technical papers, describing development such as new parameterizations or technical aspects of running models such as the reproducibility of results;
  • papers describing new standard experiments for assessing model performance, or novel ways of comparing model results with observational data;
  • model intercomparison descriptions, including experimental details and project protocols.

More details can be found in manuscript types and the journal editorial (compiled by the executive editors).

"I believe that the time is ripe for significantly better documentation of programs, and that we can best achieve this by considering programs to be works of literature."
(Donald E. Knuth, Literate Programming, 1984)

"Essentially, all models are wrong, but some are useful."
(George E. P. Box, Robustness in the strategy of scientific model building, 1979)

Highlight articles

In this paper, we redesign the mpiPOM with GPUs. Specifically, we first convert the model from its original Fortran form to a new CUDA-C version, POM.gpu-v1.0. Then we optimize the code on each of the GPUs, the communications between the GPUs, and the I/O between the GPUs and the CPUs. We show that the performance of the new model on a workstation containing 4 GPUs is comparable to that on a powerful cluster with 408 standard CPU cores, and it reduces the energy consumption by a factor of 6.8.

S. H. Xu, X. M. Huang, Y. Zhang, H. H. Fu, L. Y. Oey, F. H. Xu, and G. W. Yang

Ecosystem models provide a powerful tool for simulating ocean biology. Care must be exercised when selecting appropriate equations and parameter values to represent chosen marine ecosystems. Here, we present an efficient plankton model testbed, using simplified physics and coded in the freely available language R. Multiple runs can be undertaken for different ocean sites, permitting thorough evaluation of ecosystem model performance. The testbed also serves as an excellent resource for teaching.

T.R. Anderson, W.C. Gentleman, and A. Yool

The natural abundance of 14C in CO2 dissolved in seawater is often used to evaluate circulation and age in the ocean and in ocean models. We study limitations of using natural 14C to determine the time elapsed since water had contact with the atmosphere. We find that, globally, bulk 14C age is dominated by two equally important components, (1) the time component of circulation and (2) the “preformed 14C-age”. Considering preformed 14C-age is critical for an assessment of circulation in models.

W. Koeve, H. Wagner, P. Kähler, and A. Oschlies

We present a new approach to assess karstic groundwater recharge over Europe and the Mediterranean. Cluster analysis is used to subdivide all karst regions into four typical karst landscapes and to simulate karst recharge with a process-based karst model. We estimate its parameters by a combination of a priori information and observations of soil moisture and evapotranspiration. Independent observations of recharge that present large-scale models significantly under-estimate karstic recharge.

A. Hartmann, T. Gleeson, R. Rosolem, F. Pianosi, Y. Wada, and T. Wagener

We provide improved routines to model the ocean carbonate system, i.e., to compute ocean pH and related variables from dissolved inorganic carbon and total alkalinity. These routines (1) rely on the fastest available algorithm to solve the alkalinity-pH equation, which converges even under extreme conditions; (2) avoid common model approximations that lead to errors of 3% or more in computed variables; and (3) account for large pressure effects on subsurface pCO2, unlike other packages.

J. C. Orr and J.-M. Epitalon

Recent articles


New library and payment concept

29 Sep 2015

From January 2016 onwards, GMD will see changes to the way papers are archived and paid for.

Direct settlement of APCs for scientists from the University of Potsdam

01 Jul 2015

The Potsdam University Library and Copernicus Publications have signed an agreement on direct settlement of article processing charges (APCs).

Update data policy

29 Jun 2015

We have updated our data policy: it now also refers to the Data Citation Principles and stresses the necessity of data availability.

Publications Copernicus