High Resolution Numerical Modelling of the Atmosphere and by Kevin Hamilton (auth.), Kevin Hamilton, Wataru Ohfuchi

By Kevin Hamilton (auth.), Kevin Hamilton, Wataru Ohfuchi (eds.)

All numerical simulations of atmospheric and oceanic phenomena are constrained via the finite spatial solution, commonly requiring a parameterization of results of motions on unresolved scales on these explicitly resolved. A target of numerical modelers has been to solve as many scales of the particular circulate as essentially possible.

With the hot introduction of a brand new iteration of high-performance computing platforms reminiscent of the Earth Simulator, a few outstanding thresholds when it comes to version solution were approached or, sometimes, exceeded. for instance, lately the 1st lengthy integrations with certainly eddy-permitting worldwide ocean types were pronounced. In atmospheric reviews, decadal integrations with international versions with potent horizontal solution of approximately 20 km have now develop into attainable, and shorter integrations of worldwide versions that explicitly unravel scales impending these of person convective components have now been stated. those advancements in worldwide types were paralleled through efforts to use more and more positive answer neighborhood atmospheric versions for either weather and short-range forecasting problems.

High answer Numerical Modelling of the ambience and Ocean contains 15 person papers that spotlight the rising learn in atmospheric and oceanic technology that has been made attainable via exploiting newly to be had computational assets. effects from neighborhood atmospheric, international atmospheric, international ocean, and international coupled ocean-atmosphere types are mentioned within the a number of contributions.

Wataru Ohfuchi is Senior Scientist and chief of the ambience and Ocean Simulation examine team on the Earth Simulator middle of the Japan supplier for Marine-Earth technology and Technology.

Kevin Hamilton is Professor of Meteorology and chief of the Environmental switch learn staff on the foreign Pacific learn heart of the collage of Hawaii Manoa.

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The effects of resolution on the performance of moist convection parameterizations are a complicated issue, and at least some published studies suggest that the performance of models with state-of-the-art convection schemes may not converge toward realistic results. Experience with limited-area models suggests that model performance may pass a threshold when horizontal grid spacings are reduced to ∼1 km or less. At this point the explicit dynamics along with a bulk microphysics parameterization may realistically represent many features of moist convection and clouds.

R. Garcia, 2000: The excitation of equatorial waves by deep convection in the NCAR Community Climate Model (CCM3). J. Atmos. , 57, 3461–3487. Ricciardulli, L. D. Sardeshmukh, 2002: Local time- and space scales of organized tropical deep convection. J. Atmos. , 59, 2775–2790. M. A. J. Stensrud, 2004: Towards improved prediction: High-resolution and ensemble modeling systems in operations. Wea. Forecasting, 19, 936–949. , R. Brokopf, M. Esch, M. Giorgetta, S. Hagemann, L. Kornblueh, E. Manzini, U.

J. Wilson, 1997: A very high-resolution general circulation model simulation of the global circulation in austral winter. J. Atmos. , 54, 1107–1116. , K. Jin, B. -M. Lau, J. Shukla, V. Krishnamurthy, S. Schubert, D. Wailser, W. Stern, A. Kitoh, G. Meehl, M. Kanamitsu, V. Galin, V. -K. Park, and Y. , 2002: Intercomparison of the climatological variations of Asian summer monsoon precipitation simulated by 10 GCMs. Clim. , 19, 383–395. Kawatani, Y. and M. Takahashi, 2003: Simulation of the Baiu front in a high-resolution AGCM.

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