Zobrazeno 1 - 10
of 63
pro vyhledávání: '"T. Slawig"'
Publikováno v:
Geoscientific Model Development, Vol 17, Pp 4943-4959 (2024)
Solving the momentum balance is the computationally expensive part of simulating the evolution of ice sheets. The momentum balance is described by the nonlinear full-Stokes equations, which are solved iteratively. We use the Picard iteration and Newt
Externí odkaz:
https://doaj.org/article/4da889f6389d4eafabc29ad9929a9ce6
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 6609-6634 (2023)
Probability density functions (PDFs) provide information about the probability of a random variable taking on a specific value. In geoscience, data distributions are often expressed by a parametric estimation of their PDF, such as, for example, a Gau
Externí odkaz:
https://doaj.org/article/4a31462729cc45b788ebdc155c35c678
Publikováno v:
Earth System Science Data, Vol 13, Pp 4861-4880 (2021)
Marine particulate organic carbon stable isotope ratios (δ13CPOC) provide insights into understanding carbon cycling through the atmosphere, ocean and biosphere. They have for example been used to trace the input of anthropogenic carbon in the marin
Externí odkaz:
https://doaj.org/article/1e973f68292a41d1930858135d1d6518
Autor:
A. Cotronei, T. Slawig
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 2783-2804 (2020)
We converted the radiation part of the atmospheric model ECHAM to a single-precision arithmetic. We analyzed different conversion strategies and finally used a step-by-step change in all modules, subroutines and functions. We found out that a small c
Externí odkaz:
https://doaj.org/article/e42920cd4f944884a7fa9b9c5be75009
Autor:
M. Schartau, P. Wallhead, J. Hemmings, U. Löptien, I. Kriest, S. Krishna, B. A. Ward, T. Slawig, A. Oschlies
Publikováno v:
Biogeosciences, Vol 14, Iss 6, Pp 1647-1701 (2017)
To describe the underlying processes involved in oceanic plankton dynamics is crucial for the determination of energy and mass flux through an ecosystem and for the estimation of biogeochemical element cycling. Many planktonic ecosystem models were d
Externí odkaz:
https://doaj.org/article/bbb513496f2046e9912c809be9eba06d
Autor:
J. Piwonski, T. Slawig
Publikováno v:
Geoscientific Model Development, Vol 9, Iss 10, Pp 3729-3750 (2016)
We designed and implemented a modular software framework for the offline simulation of steady cycles of 3-D marine ecosystem models based on the transport matrix approach. It is intended for parameter optimization and model assessment experiments. We
Externí odkaz:
https://doaj.org/article/09dfb09cdfc94fa4a5589c02faa22bda
Publikováno v:
Geoscientific Model Development, Vol 8, Iss 3, Pp 791-804 (2015)
The geosciences are a highly suitable field of application for optimizing model parameters and experimental designs especially because many data are collected. In this paper, the weighted least squares estimator for optimizing model parameters is pr
Externí odkaz:
https://doaj.org/article/a07c622489e34e9c9468190d48b6a062
Publikováno v:
Biogeosciences, Vol 10, Iss 2, Pp 1169-1182 (2013)
This paper presents the application of the Linear Quadratic Optimal Control (LQOC) method to a parameter optimization problem for a one-dimensional marine ecosystem model of NPZD (N for dissolved inorganic nitrogen, P for phytoplankton, Z for zooplan
Externí odkaz:
https://doaj.org/article/5d144fc19c83490f876230848301f8ed
Publikováno v:
Geoscientific Model Development, Vol 6, Iss 1, Pp 17-28 (2013)
We have ported an implementation of the spin-up for marine ecosystem models based on transport matrices to graphics processing units (GPUs). The original implementation was designed for distributed-memory architectures and uses the Portable, Extensib
Externí odkaz:
https://doaj.org/article/7de757f69fd24a8eb6067a016f024f33
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