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By National Research Council, Division on Earth and Life Studies, Board on Atmospheric Sciences and Climate, Committee on Challenges in Representing Physical Processes in Coupled Atmosphere-Land-Ocean Models

The nationwide Academies' Board on Atmospheric Sciences and weather (BASC) held a workshop to discover and review present efforts to version actual approaches of coupled atmosphere-land-ocean (A-L-O) versions. Numerical versions of the ambience and ocean are crucial to climate prediction, examine, and schooling. even if nice strides were revamped the prior few a long time in figuring out the ambience and ocean, modeling services, and numerical A-L-O simulations, a few unresolved approaches within the versions don't safely characterize wisdom of the underlying physics. additionally, there's proof that extra growth in numerical simulations is being impeded via the sluggish velocity of development within the illustration of key actual strategies within the versions and the truth that geophysical circulation versions are usually not receiving the eye had to make those instruments extra helpful and exact. those versions frequently are used to foretell destiny occasions, so it really is central that their underlying actual methods be represented as robustly as attainable. through the workshop, the parameterization of actual approaches in A-L-O versions used to be addressed, together with linked mistakes, checking out, and efforts to enhance using parameterizations. members additionally tested highbrow and medical demanding situations in modeling and highlighted the concept that a few of the key impediments to development in representing actual strategies are basically cultural in nature.

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Extra resources for Improving the Scientific Foundation for Atmosphere-land-ocean Simulations: Report of a Workshop

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Different gravity wave parameterization methods all use linear theory to describe the wave propagation with height, but they differ in the descriptions of the wave sources and the wave dissipation with height. Note that the GISS model uses a very unique wave source description that allows feedbacks on the sources from changes in the climate like no other model. This could be a factor that leads to its greater AO sensitivity to greenhouse gas changes. Can we find sufficient observational constraints for the parameterization of gravity wave effects?

If these experiments work well, then expanding the scope of the CPTs could be beneficial in addressing additional processes and carrying out new field measurement programs in which this comprehensive responsibility is inherent in their conception and design. Workshop participants also discussed that, as part of the process of continually improving models, efforts need to be made to remove physical representations that have been shown to be inferior or defective. It is important that the justified desire for multi-model ensembles not result in the retention of parameterizations that are known to be deficient.

Copyright © National Academy of Sciences. All rights reserved. html References AMS (American Meteorological Society). 2000. Glossary of Meteorology. T. S. , 2nd Edition. Boston: American Meteorological Society. , D. Williamson, R. Cederwall, M. Fiorino, J. Hnilo, J. Olson, T. Phillips, G. Potter, and S. Xie. 2005. Diagnosis of CAM2 in NWP configuration. J. Geophys. Res. (in press) Bretherton, C. , R. Ferrari, and S. Legg. 2004. Climate Process Teams: A new approach to improving climate models. S.

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