Machine learning parameterizations for ozone: climate model transferability
File(s)CI2019_paper_74.pdf (2.33 MB)
Published version
Author(s)
Type
Conference Paper
Abstract
Many climate modeling studies have demon-strated the importance of two-way interactions betweenozone and atmospheric dynamics. However, atmosphericchemistry models needed for calculating changes in ozoneare computationally expensive. Nowack et al. [1] high-lighted the potential of machine learning-based ozoneparameterizations in constant climate forcing simulations,with ozone being predicted as a function of the atmo-spheric temperature state. Here we investigate the roleof additional time-lagged temperature information underpreindustrial forcing conditions. In particular, we testif the use of Long Short-Term Memory (LSTM) neuralnetworks can significantly improve the predictive skill ofthe parameterization. We then introduce a novel workflowto transfer the regression model to the new UK EarthSystem Model (UKESM). For this, we show for the firsttime how machine learning parameterizations could betransferred between climate models, a pivotal step tomaking any such parameterization widely applicable inclimate science. Our results imply that ozone parame-terizations could have much-extended scope as they arenot bound to individual climate models but, once trained,could be used in a number of different models. We hope tostimulate similar transferability tests regarding machinelearning parameterizations developed for other Earthsystem model components such as ocean eddy modeling,convection, clouds, or carbon cycle schemes.
Date Issued
2019-12-01
Date Acceptance
2019-10-07
Citation
Climate Informatics, 2019, pp.263-268
Publisher
UCAR
Start Page
263
End Page
268
Journal / Book Title
Climate Informatics
Copyright Statement
© 2019 Author(s). Distributed under license by the University Corporation for Atmospheric Research (UCAR). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Source
9th International Workshop on Climate Informatics
Place of Publication
https://sites.google.com/view/climateinformatics2019/proceedings
Publication Status
Published
Start Date
2019-10-02
Finish Date
2019-10-04
Coverage Spatial
Paris, France
Date Publish Online
2020-01-07