Difference between pages "Publications" and "Optimisation"
From UKCA
(Difference between pages)
(→2013: AQUM paper) |
FionaOConnor (talk | contribs) |
||
| Line 1: | Line 1: | ||
| + | =Model Optimisation= |
||
| − | ==List of UKCA Publications== |
||
| − | Here is a list of Publications (by year) which use the UKCA Model: |
||
| + | The cost of the Stratosphere-Troposphere chemistry scheme in UKCA using the Newton-Raphson solver with the on-line photolysis scheme Fast-jX relative to the climate model HadGEM3-A is as follows: |
||
| − | == 2013 == |
||
| + | |||
| − | * [http://www.atmos-chem-phys-discuss.net/13/437/2013/acpd-13-437-2013.html Constraints on aerosol processes in climate models from vertically-resolved aircraft observations of black carbon]. Z. Kipling, P. Stier, J. P. Schwarz, A. E. Perring, J. R. Spackman, G. W. Mann, C. E. Johnson, and P. J. Telford. Atmos. Chem. Phys. Dis., 13, 437-473, 2013 |
||
| + | {| border="1" |
||
| − | * [http://www.geosci-model-dev.net/6/161/2013/gmd-6-161-2013.html Implementation of the Fast-JX Photolysis scheme (v6.4) into the UKCA component of the MetUM chemistry-climate model (v7.3)]. P. J. Telford, N. L. Abraham, A. T. Archibald, P. Braesicke, M. Dalvi, O. Morgenstern, F. M. O'Connor, N. A. D. Richards, and J. A. Pyle. Geosci. Model Dev., 6, 161-177, 2013. |
||
| + | ! Model || PEs ||OpenMP Threads ||Time Elapsed (sec) |
||
| − | * [http://www.geosci-model-dev.net/6/353/2013/gmd-6-353-2013.html Air quality modelling using the Met Office Unified Model (AQUM OS24-26): model description and initial evaluation]. Savage, N. H., Agnew, P., Davis, L. S., Ordóñez, C., Thorpe, R., Johnson, C. E., O'Connor, F. M., and Dalvi, M., Geosci. Model Dev., 6, 353-372, doi:10.5194/gmd-6-353-2013, 2013. |
||
| + | |- |
||
| + | |HadGEM3-A || 8x16 || 1 || 3798 |
||
| + | |- |
||
| + | |HadGEM3-A + StratTrop(N-R) + Fast-jX || 8x16 || 1 || 15602 |
||
| + | |- |
||
| + | |HadGEM3-A || 8x16 || 2 || 2328 |
||
| + | |- |
||
| + | |HadGEM3-A + StratTrop(N-R) + Fast-jX || 8x16 || 2 || 11730 |
||
| + | |- |
||
| + | |} |
||
| − | == 2012 == |
||
| + | On a 8x16 PE configuration and 1 OpenMP thread on the Monsoon facility or the Met Office's Power6 IBM (hpc1e/1f), UKCA and Fast-jX together add 310% to the cost of HadGEM3-A. However, with 2 OpenMP threads and no OpenMP compiler directives in UKCA, the relative cost of UKCA is even higher, adding approximately 400% to the cost of HadGEM3-A. Adding aerosol chemistry and UKCA-MODE aerosols will make it even more costly. Therefore, there is a clear need for optimisation. |
||
| − | * [http://www.atmos-chem-phys-discuss.net/12/21437/2012/acpd-12-21437-2012.pdf Impact of the modal aerosol scheme GLOMAP-mode on aerosol forcing in the Hadley Centre Global Environmental Model]. N. Bellouin, G. W. Mann, M. T. Woodhouse, C. Johnson, K. S. Carslaw, and M. Dalvi, Atmos. Chem. Phys. Discuss., 12, 21437-21479, 2012. |
||
| + | As part of the HadGEM3-ES development project, currently being led by F. O'Connor, there are plans to do some optimisation work on UKCA. In particular, a more complete assessment of the model cost will be carried out and the potential speedup which may be gained from simple code re-writing, load balancing, and the use of OpenMP, dedicated I/O servers and maths libraries will be explored. Some scientific optimisation such as throwing out unwanted reactions (or species), tweaking chemistry to improve convergence, etc. should also be considered. The use of an alternative solver, such as a Rosenbrock solver, may also be investigated. |
||
| − | * [http://www.atmos-chem-phys.net/12/6775/2012/acp-12-6775-2012.html The scavenging processes controlling the seasonal cycle in Arctic sulphate and black carbon aerosol]. J. Browse, K. S. Carslaw, S. R. Arnold, K. Pringle, and O. Boucher, Atmos. Chem. Phys., 12, 6775-6798, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys.net/12/11573/2012/acp-12-11573-2012.html No statistically significant effect of a short-term decrease in the nucleation rate on atmospheric aerosols]. E. M. Dunne, L. A. Lee, C. L. Reddington, and K. S. Carslaw, Atmos. Chem. Phys., 12, 11573-11587, 2012. |
||
| − | |||
| − | * [http://www.agu.org/journals/gl/gl1220/2012GL053401/index.shtml Modelling future changes to the stratospheric source gas injection of biogenic bromocarbons]. Hossaini, R., et al., Geophys. Res. Lett., 39, L20813, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys.net/12/9739/2012/acp-12-9739-2012.html Mapping the uncertainty in global CCN using emulation]. L. A. Lee, K. S. Carslaw, K. J. Pringle, and G. W. Mann, Atmos. Chem. Phys., 12, 9739-9751, 2012 |
||
| − | |||
| − | * [http://www.atmos-chem-phys.net/12/4449/2012/acp-12-4449-2012.pdf Intercomparison of modal and sectional aerosol microphysics representations within the same 3-D global chemical transport model]. G. W. Mann, K. S. Carslaw, D. A. Ridley, D. V. Spracklen, K. J. Pringle, J. Merikanto, H. Korhonen, J. P. Schwarz, L. A. Lee, P. T. Manktelow, M. T. Woodhouse, A. Schmidt, T. J. Breider, K. M. Emmerson, C. L. Reddington, M. P. Chipperfield, and S. J. Pickering, Atmos. Chem. Phys., Atmos. Chem. Phys., 12, 4449–4476, 2012. |
||
| − | |||
| − | *[http://www.agu.org/journals/jd/jd1222/2012JD018276/ Sensitivity of biogenic isoprene emissions to past, present, and future environmental conditions and implications for atmospheric chemistry]. Pacifico, F., G. A. Folberth, C. D. Jones, S. P. Harrison, and W. J. Collins, J. Geophys. Res., 117, D22302, doi:10.1029/2012JD018276, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys-discuss.net/12/7125/2012/acpd-12-7125-2012.html A multi-model assessment of the efficacy of sea spray geoengineering]. K. J. Pringle, K. S. Carslaw, T. Fan, G.W. Mann, A. Hill, P. Stier, K. Zhang, and H. Tost, Atmos. Chem. Phys. Discuss., 12, 7125-7166, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys-discuss.net/12/26503/2012/acpd-12-26503-2012.pdf The size distribution and mixing state of black carbon aerosol over Europe]. C. L. Reddington, G. McMeeking, G. W. Mann, H. Coe, M. G. Frontoso, D. Liu, M. Flynn, D. V. Spracklen, and K. S. Carslaw, Atmos. Chem. Phys. Discuss., 12, 26503-26560, 2012. |
||
| − | |||
| − | * [http://www.geosci-model-dev-discuss.net/5/3131/2012/gmdd-5-3131-2012.html Air quality modelling using the Met Office Unified Model: model description and initial evaluation]. N. H. Savage, P. Agnew, L. S. Davis, C. Ordóñez, R. Thorpe, C. E. Johnson, F. M. O'Connor, and M. Dalvi. Geosci. Model Dev. Discuss., 5, 3131-3182, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys.net/12/7321/2012/acp-12-7321-2012.pdf Importance of tropospheric volcanic aerosol for indirect radiative forcing of climate]. A. Schmidt, K. S. Carslaw, G. W. Mann, A. Rap, K. J. Pringle, D. V. Spracklen, M. Wilson, and P. M. Forster, Atmos. Chem. Phys., 12, 7321-7339, 2012. |
||
| − | |||
| − | * [http://www.atmos-chem-phys-discuss.net/12/27395/2012/acpd-12-27395-2012.pdf Sensitivity of cloud condensation nuclei to regional changes in dimethyl-sulphide emissions]. M. T. Woodhouse, G. W. Mann, K. S. Carslaw, and O. Boucher, Atmos. Chem. Phys. Discuss., 12, 27395-27423, 2012. |
||
| − | |||
| − | ==2011== |
||
| − | |||
| − | * [http://www.pnas.org/content/108/38/15710.full.pdf+html Excess mortality in Europe following a future Laki-style Icelandic eruption]. A. Schmidt, B. Ostro, K. S. Carslaw, M. Wilson, T. Thordarson, G. W. Mann and A. J. Simmons, Proceedings of the National Academy of Sciences, USA, vol. 108 ∣ no. 38, pp. 15710–15715, 2011. |
||
| − | * [http://www.atmos-chem-phys.net/11/12253/2011/acp-11-12253-2011.pdf Emulation of a complex global aerosol model to quantify sensitivity to uncertain parameters]. L. A. Lee, K. S. Carslaw, K. J. Pringle, G. W. Mann, and D. V. Spracklen, Atmos. Chem. Phys., 11, 12253-12273, 2011. |
||
| − | * [http://www.agu.org/pubs/crossref/2011/2010GL046520.shtml Impacts of HOx regeneration and recycling in the oxidation of isoprene: Consequences for the composition of past, present and future atmospheres] A. T. Archibald, J. G. Levine, N. L. Abraham, M. C. Cooke, P. M. Edwards, D. E. Heard, M. E. Jenkin, A. Karunaharan, R. C. Pike, P. S. Monks, D. E. Shallcross, P. J. Telford, L. K. Whalley, and J. A. Pyle, Geophys. Res. Lett. , 38 , L05804, doi:10.1029/2010GL046520 |
||
| − | * [http://www.agu.org/pubs/crossref/2011/2010GL046228.shtml Ozone concentration changes in the Asian summer monsoon anticyclone and lower stratospheric water vapour: An idealised model study]: ,Braesicke, P., O. J. Smith, P. Telford, and J. A. Pyle (2011), Geophys. Res. Lett., 38, 10.1029/2010GL046228, L03810. |
||
| − | * [http://www.geosci-model-dev.net/4/1051/2011/ Development and evaluation of an Earth-system model - HadGEM2] W. J. Collins, N. Bellouin, M. Doutriaux-Boucher, N. Gedney, P. Halloran, T. Hinton, J. Hughes, C. D. Jones, M. Joshi, S. Liddicoat, G. Martin, F. O'Connor, J. Rae, C. Senior, S. Sitch, I. Totterdell, A. Wiltshire, and S. Woodward, Geosci. Model Dev., 4, 1051-1075, 2011. |
||
| − | * [http://dx.doi.org/10.5194/acp-11-599-2011 Attribution of observed changes in stratospheric ozone and temperature] Gillett, N. P., Akiyoshi, H., Bekki, S., Braesicke, P., Eyring, V., Garcia, R., Karpechko, A. Yu., McLinden, C. A., Morgenstern, O., Plummer, D. A., Pyle, J. A., Rozanov, E., Scinocca, J., and Shibata, K., (2011), Atmos. Chem. Phys., 10.5194/acp-11-599-2011 11, 599-609 |
||
| − | * [http://www.geosci-model-dev.net/4/543/2011/ The HadGEM2-ES implementation of CMIP5 centennial simulations] C. D. Jones, J. K. Hughes, N. Bellouin, S. C. Hardiman, G. S. Jones, J. Knight, S. Liddicoat, F. M. O'Connor, R. J. Andres, C. Bell, K.-O. Boo, A. Bozzo, N. Butchart, P. Cadule, K. D. Corbin, M. Doutriaux-Boucher, P. Friedlingstein, J. Gornall, L. Gray, P. R. Halloran, G. Hurtt, W. J. Ingram, J.-F. Lamarque, R. M. Law, M. Meinshausen, S. Osprey, E. J. Palin, L. Parsons Chini, T. Raddatz, M. G. Sanderson, A. A. Sellar, A. Schurer, P. Valdes, N. Wood, S. Woodward, M. Yoshioka, and M. Zerroukat, Geosci. Model Dev., 4, 543-570, 2011. |
||
| − | * [http://www.atmos-chem-phys-discuss.net/11/9057/2011/acpd-11-9057-2011.pdf Large methane releases lead to strong aerosol forcing and reduced cloudiness] T. Kurtén, L. Zhou, R. Makkonen, J. Merikanto, P. Räisänen, M. Boy, N. Richards, A. Rap, S. Smolander, A. Sogachev, A. Guenther, G. W. Mann, K. Carslaw, and M. Kulmala (2011), Atmos. Chem. Phys. Discuss., 11, 9057-9081. |
||
| − | *[http://www.geosci-model-dev.net/4/723/2011/ The HadGEM2 family of Met Office Unified Model climate configurations] The HadGEM2 Development Team: G. M. Martin, Bellouin, N., Collins, W. J., Culverwell, I. D., Halloran, P. R., Hardiman, S. C., Hinton, T. J., Jones, C. D., McDonald, R. E., McLaren, A. J., O'Connor, F. M., Roberts, M. J., Rodriguez, J.M., Woodward, S., Best, M. J., Brooks, M. E., Brown, A. R., Butchart, N., Dearden, C., Derbyshire, S. H., Dharssi, I., Doutriaux-Boucher, M., Edwards, J. M., Falloon, P. D., Gedney, N., Gray, L. J., Hewitt, H. T., Hobson, M., Huddleston, M. R., Hughes, J., Ineson, S., Ingram, W. J., James, P. M., Johns, T. C., Johnson, C. E., Jones, A., Jones, C. P., Joshi, M. M., Keen, A. B., Liddicoat, S., Lock, A. P., Maidens, A. V., Manners, J. C., Milton, S. F., Rae, J. G. L., Ridley, J. K., Sellar, A., Senior, C. A., Totterdell, I. J., Verhoef, A., Vidale, P. L., and Wiltshire, A., Geosci. Model Dev., 4, 723-757, 2011. |
||
| − | * [http://www.atmos-chem-phys.net/11/2765/2011/acp-11-2765-2011.html Representation of tropical deep convection in atmospheric models – Part 1: Meteorology and comparison with satellite observations],Russo, M. R., Marécal, V., Hoyle, C. R., Arteta, J., Chemel, C., Chipperfield, M. P., Dessens, O., Feng, W., Hosking, J. S., Telford, P. J., Wild, O., Yang, X., and Pyle, J. A, Atmos. Chem. Phys., 11, doi:10.5194/acp-11-2765-2011, 2765-2786. |
||
| − | * [http://www.atmos-chem-phys.net/11/8459/2011/acp-11-8459-2011.pdf Minor effect of physical size sorting on iron solubility of transported mineral dust] Z. B. Shi, M. T. Woodhouse, K. S. Carslaw, M. D. Krom, G. W. Mann, A. R. Baker, I. Savov, G. Fones, B. Brooks, T. D. Jickells, and L. G. Benning, Atmos. Chem. Phys., 11, 8459-8469, 2011. |
||
| − | * [http://www.agu.org/pubs/crossref/2011/2010GB003837.shtml Influence of chemical weathering and aging of iron oxides on the potential iron solubility of Saharan dust during simulated atmospheric processing] Z. B. Shi, M. Krom, S. Bonneville, A. R. Baker, C. Bristow, N. Drake, G. W. Mann, K. S. Carslaw, J. B. McQuaid, T. Jickells, L. G. Benning, Global Biogeochem. Cycles, doi:10.1029/2010GB003837, 2011. |
||
| − | * [http://www.atmos-chem-phys.net/11/12109/2011/acp-11-12109-2011.pdf Aerosol mass spectrometer constraint on the global secondary organic aerosol budget] D. V. Spracklen, J. L. Jimenez, K. S. Carslaw, D. R. Worsnop, M. J. Evans, G. W. Mann, Q. Zhang, M. R. Canagaratna, J. Allan, H. Coe, G. McFiggans, A. Rap, and P. Forster (2011), Atmos. Chem. Phys., 11, 12109-12136, 2011. |
||
| − | * [http://www.atmos-chem-phys.net/11/9067/2011/acp-11-9067-2011.pdf Global cloud condensation nuclei influenced by carbonaceous combustion aerosol] D. V. Spracklen, K. S. Carslaw, U. Poeschl, A. Rap, and P. M. Forster (2011), Atmos. Chem. Phys., 11, 9067-9087, 2011. |
||
| − | * [http://www.atmos-chem-phys.net/11/5819/2011/acp-11-5819-2011.html Global multi-year O3-CO correlation patterns from models and TES satellite observations] A. Voulgarakis, P. J. Telford, A. M. Aghedo, P. Braesicke, G. Faluvegi, N. L. Abraham, K. W. Bowman, J. A. Pyle, and D. T. Shindell, (2011), Atmos. Chem. Phys., 11, 5819-5838, doi:10.5194/acp-11-5819-2011 |
||
| − | |||
| − | ==2010== |
||
| − | |||
| − | * [http://www.agu.org/pubs/crossref/2010/2009JD013577.shtml Chemistry-climate model simulations of spring Antarctic ozone]: Austin, J., et al. (2010), Chemistry-climate model simulations of spring Antarctic ozone, J. Geophys. Res., 115, D00M11, doi:10.1029/2009JD013577. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2010JD013857.shtml Decline and recovery of total column ozone using a multimodel time series analysis]: Austin, J., et al. (2010), Decline and recovery of total column ozone using a multimodel time series analysis, J. Geophys. Res., 115, D00M10, doi:10.1029/2010JD013857. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2009GL040868.shtml Impact of BrO on dimethylsulfide in the remote marine boundary layer] Breider, T. J., M. P. Chipperfield, N. A. D. Richards, K. S. Carslaw, G. W. Mann, and D. V. Spracklen (2010), Impact of BrO on dimethylsulfide in the remote marine boundary layer, Geophys. Res. Lett., 37, L02807, doi:10.1029/2009GL040868. |
||
| − | * [http://www.atmos-chem-phys.net/10/9473/2010/acp-10-9473-2010.html The potential to narrow uncertainty in projections of stratospheric ozone over the 21st century]: Charlton-Perez, A. J., Hawkins, E., Eyring, V., Cionni, I., Bodeker, G. E., Kinnison, D. E., Akiyoshi, H., Frith, S. M., Garcia, R., Gettelman, A., Lamarque, J. F., Nakamura, T., Pawson, S., Yamashita, Y., Bekki, S., Braesicke, P., Chipperfield, M. P., Dhomse, S., Marchand, M., Mancini, E., Morgenstern, O., Pitari, G., Plummer, D., Pyle, J. A., Rozanov, E., Scinocca, J., Shibata, K., Shepherd, T. G., Tian, W., and Waugh, D. W.: The potential to narrow uncertainty in projections of stratospheric ozone over the 21st century, Atmos. Chem. Phys., 10, 9473-9486, doi:10.5194/acp-10-9473-2010, 2010 |
||
| − | * [http://www.atmosp.physics.utoronto.ca/SPARC SPARC CCMVal (2010), SPARC CCMVal Report on the Evaluation of Chemistry-Climate Models]: V. Eyring, T. G. Shepherd, D. W. Waugh (eds.), SPARC CCMVal (2010), SPARC CCMVal Report on the Evaluation of Chemistry-Climate Models, SPARC Report No. 5, WCRP-X, WMO/TD-No. X. |
||
| − | * [http://www.atmos-chem-phys.net/10/9451/2010/acp-10-9451-2010.html Multi-model assessment of stratospheric ozone return dates and ozone recovery in CCMVal-2 models] Eyring, V., Cionni, I., Bodeker, G. E., Charlton-Perez, A. J., Kinnison, D. E., Scinocca, J. F., Waugh, D. W., Akiyoshi, H., Bekki, S., Chipperfield, M. P., Dameris, M., Dhomse, S., Frith, S. M., Garny, H., Gettelman, A., Kubin, A., Langematz, U., Mancini, E., Marchand, M., Nakamura, T., Oman, L. D., Pawson, S., Pitari, G., Plummer, D. A., Rozanov, E., Shepherd, T. G., Shibata, K., Tian, W., Braesicke, P., Hardiman, S. C., Lamarque, J. F., Morgenstern, O., Pyle, J. A., Smale, D., and Yamashita, Y.: Multi-model assessment of stratospheric ozone return dates and ozone recovery in CCMVal-2 models, Atmos. Chem. Phys., 10, 9451-9472, doi:10.5194/acp-10-9451-2010, 2010. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2009JD013770.shtml Stratosphere-troposphere coupling and annular mode variability in chemistry-climate models] Gerber, E. P., et al. (2010), Stratosphere-troposphere coupling and annular mode variability in chemistry-climate models, J. Geophys. Res., 115, D00M06, doi:10.1029/2009JD013770. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2010JD013884.shtml Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics] Hegglin, M. I., et al. (2010), Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics, J. Geophys. Res., 115, D00M09, doi:10.1029/2010JD013884. |
||
| − | * [http://www.agu.org/journals/jd/jd1007/2009JD012788/ Assessment of the breakup of the Antarctic polar vortex in two new chemistry-climate models]: Hurwitz, M. M., P. A. Newman, F. Li, L. D. Oman, O. Morgenstern, P. Braesicke, and J. A. Pyle (2010), Assessment of the breakup of the Antarctic polar vortex in two new chemistry-climate models, J. Geophys. Res., 115, D07105, doi:10.1029/2009JD012788. |
||
| − | * [http://www.atmos-chem-phys.org/10/4133/2010/acp-10-4133-2010.html Enhancement of marine cloud albedo via controlled sea spray injections: a global model study of the influence of emission rates, microphysics and transport] Korhonen, H., Carslaw, K. S., and Romakkaniemi, S.: Enhancement of marine cloud albedo via controlled sea spray injections: a global model study of the influence of emission rates, microphysics and transport, Atmos. Chem. Phys., 10, 4133-4143, doi:10.5194/acp-10-4133-2010, 2010. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2009GL041320.shtml Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds] Korhonen, H., K. S. Carslaw, P. M. Forster, S. Mikkonen, N. D. Gordon, and H. Kokkola (2010), Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds, Geophys. Res. Lett., 37, L02805, doi:10.1029/2009GL041320. |
||
| − | * [http://www.atmos-chem-phys.org/10/365/2010/acp-10-365-2010.html The impact of dust on sulfate aerosol, CN and CCN during an East Asian dust storm] Manktelow, P. T., Carslaw, K. S., Mann, G. W., and Spracklen, D. V.: The impact of dust on sulfate aerosol, CN and CCN during an East Asian dust storm, Atmos. Chem. Phys., 10, 365-382, doi:10.5194/acp-10-365-2010, 2010. |
||
| − | * [http://www.geosci-model-dev.net/3/519/2010/gmd-3-519-2010.html Description and evaluation of GLOMAP-mode: a modal global aerosol microphysics model for the UKCA composition-climate model] Mann, G. W., Carslaw, K. S., Spracklen, D. V., Ridley, D. A., Manktelow, P. T., Chipperfield, M. P., Pickering, S. J., and Johnson, C. E.: Description and evaluation of GLOMAP-mode: a modal global aerosol microphysics model for the UKCA composition-climate model, Geosci. Model Dev., 3, 519-551, doi:10.5194/gmd-3-519-2010, 2010. |
||
| − | * [http://www.atmos-chem-phys.org/10/695/2010/acp-10-695-2010.html Effects of boundary layer particle formation on cloud droplet number and changes in cloud albedo from 1850 to 2000] Merikanto, J., Spracklen, D. V., Pringle, K. J., and Carslaw, K. S.: Effects of boundary layer particle formation on cloud droplet number and changes in cloud albedo from 1850 to 2000, Atmos. Chem. Phys., 10, 695-705, doi:10.5194/acp-10-695-2010, 2010. |
||
| − | * [http://www.agu.org/journals/jd/jd1017/2009JD013347/ Anthropogenic forcing of the Northern Annular Mode in CCMVal-2 models]: Morgenstern, O., H. Akiyoshi, S. Bekki, P. Braesicke, N. Butchart, M. P. Chipperfield, D. Cugnet, M. Deushi, S. S. Dhomse, R. R. Garcia, A. Gettelman, N. P. Gillett, S. C. Hardiman, J. Jumelet, D. E. Kinnison, J.-F. Lamarque, F. Lott, M. Marchand, M. Michou, T. Nakamura, D. Olivié, T. Peter, D. Plummer, J. A. Pyle, E. Rozanov, D. Saint-Martin, J. F. Scinocca, K. Shibata, M. Sigmond, D. Smale, H. Teyssèdre, W. Tian, A. Voldoire, and Y. Yamashita (2010), J. Geophys. Res., 115, D00M03, doi:10.1029/2009JD013347. |
||
| − | * [http://www.agu.org/journals/jd/jd1015/2009JD013728/ Review of the formulation of present-generation stratospheric chemistry-climate models and associated external forcings]: O. Morgenstern, M. A. Giorgetta, K. Shibata, V. Eyring, D. W. Waugh, T. G. Shepherd, H. Akiyoshi, J. Austin, A. J. G. Baumgaertner, S. Bekki, P. Braesicke, C. Brühl, M. P. Chipperfield, D. Cugnet, M. Dameris, S. Dhomse, S. M. Frith, H. Garny, A. Gettelman, S. C. Hardiman, M. I. Hegglin, P. Jöckel, D. E. Kinnison, J.-F. Lamarque, E. Mancini, E. Manzini, M. Marchand, M. Michou, T. Nakamura, J. E. Nielsen, D. Olivié, G. Pitari, D. A. Plummer, E. Rozanov, J. F. Scinocca, D. Smale, H. Teyssèdre, M. Toohey, W. Tian, and Y. Yamashita (2010), J. Geophys. Res., 115, D00M02, doi:10.1029/2009JD013728. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2010JD014206.shtml Evidence for changes in stratospheric transport and mixing over the past three decades based on multiple data sets and tropical leaky pipe analysis] Ray, E. A., et al. (2010), Evidence for changes in stratospheric transport and mixing over the past three decades based on multiple data sets and tropical leaky pipe analysis, J. Geophys. Res., 115, D21304, doi:10.1029/2010JD014206. |
||
| − | * [http://www.atmos-chem-phys.org/10/6025/2010/acp-10-6025-2010.html The impact of the 1783–1784 AD Laki eruption on global aerosol formation processes and cloud condensation nuclei] Schmidt, A., Carslaw, K. S., Mann, G. W., Wilson, M., Breider, T. J., Pickering, S. J., and Thordarson, T.: The impact of the 1783–1784 AD Laki eruption on global aerosol formation processes and cloud condensation nuclei, Atmos. Chem. Phys., 10, 6025-6041, doi:10.5194/acp-10-6025-2010, 2010. |
||
| − | * [http://www.agu.org/pubs/crossref/2010/2010JD014271.shtml Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment] Son, S.-W., et al. (2010), Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment, J. Geophys. Res., 115, D00M07, doi:10.1029/2010JD014271. |
||
| − | * [http://www.atmos-chem-phys.net/10/7117/2010/acp-10-7117-2010.html Effects of climate-induced changes in isoprene emissions after the eruption of Mount Pinatubo] Telford, P., J. Lathiere, N. L. Abraham, P. Braesicke, C. E. Johnson, O. Morgenstern, F. M. O'Connor, R. C. Pike, O. Wild, P. J. Young, D. Beerling, C. N. Hewitt and J. A. Pyle (2010), Effects of climate-induced changes in isoprene emissions after the eruption of Mount Pinatubo, Atmos. Chem. Phys., 10, 7117-7125, doi:10.5194/acp-10-7117-2010 |
||
| − | * [http://www.atmos-chem-phys.org/10/7545/2010/acp-10-7545-2010.html Low sensitivity of cloud condensation nuclei to changes in the sea-air flux of dimethyl-sulphide] Woodhouse, M. T., Carslaw, K. S., Mann, G. W., Vallina, S. M., Vogt, M., Halloran, P. R., and Boucher, O.: Low sensitivity of cloud condensation nuclei to changes in the sea-air flux of dimethyl-sulphide, Atmos. Chem. Phys., 10, 7545-7559, doi:10.5194/acp-10-7545-2010, 2010. |
||
| − | * [http://www.agu.org/journals/gl/gl1009/2010GL042812/ Impact of stratospheric ozone recovery on tropospheric ozone and the oxidizing capacity]: Zeng, G., O. Morgenstern, P. Braesicke, and J. A. Pyle (2010), Geophys. Res. Lett., 37, L09805, doi:10.1029/2010GL042812. |
||
| − | |||
| − | ==2009== |
||
| − | |||
| − | * [http://www.geosci-model-dev.net/2/43/2009/ Evaluation of the new UKCA climate-composition model – Part 1: The stratosphere]: Morgenstern, O., Braesicke, P., O'Connor, F. M., Bushell, A. C., Johnson, C. E., Osprey, S. M., and Pyle, J. A., Geosci. Model Dev., 2, 43-57, 2009. |
||
| − | * [http://www.agu.org/journals/gl/gl0916/2009GL039152/ Interactions between tropospheric chemistry and climate model temperature and humidity biases]: F. M. O'Connor, C. E. Johnson, O. Morgenstern, and W. J. Collins, Geophys. Res. Lett., 36, L16801, doi:10.1029/2009GL039152, 2009. |
||
| − | * [http://www.atmos-chem-phys.net/9/4251/2009/acp-9-4251-2009.html Reassessment of causes of ozone column variability following the eruption of Mount Pinatubo using a nudged CCM]: Telford, P., Braesicke, P., Morgenstern, O., and Pyle, J.: Reassessment of causes of ozone column variability following the eruption of Mount Pinatubo using a nudged CCM, Atmos. Chem. Phys., 9, 4251-4260, 2009. |
||
| − | |||
| − | ==2008== |
||
| − | |||
| − | * [http://www.agu.org/pubs/crossref/2008/2007JD009718.shtml Influence of oceanic dimethyl sulfide emissions on cloud condensation nuclei concentrations and seasonality over the remote Southern Hemisphere oceans: A global model study]: Korhonen, H., K. S. Carslaw, D. V. Spracklen, G. W. Mann, and M. T. Woodhouse (2008), Influence of oceanic dimethyl sulfide emissions on cloud condensation nuclei concentrations and seasonality over the remote Southern Hemisphere oceans: A global model study, J. Geophys. Res., 113, D15204, doi:10.1029/2007JD009718. |
||
| − | * [http://www.agu.org/pubs/crossref/2008/2008GL034590.shtml The World Avoided by the Montreal Protocol]: Morgenstern, O., P. Braesicke, M. M. Hurwitz, F. M. O'Connor, A. C. Bushell, C. E. Johnson, and J. A. Pyle (2008), Geophys. Res. Lett., 35, L16811, doi:10.1029/2008GL034590. |
||
| − | * [http://www.atmos-chem-phys.net/8/1701/2008/acp-8-1701-2008.html Technical Note: Description and assessment of a nudged version of the new dynamics Unified Model]: Telford, P. J., Braesicke, P., Morgenstern, O., and Pyle, J. A.: Technical Note: Description and assessment of a nudged version of the new dynamics Unified Model, Atmos. Chem. Phys., 8, 1701-1712, 2008. |
||
| − | * [http://www.agu.org/pubs/crossref/2008/2007GL033038.shtml Contribution of particle formation to global cloud condensation nuclei concentrations]: Spracklen, D. V., et al. (2008), Contribution of particle formation to global cloud condensation nuclei concentrations, Geophys. Res. Lett., 35, L06808, doi:10.1029/2007GL033038. |
||
| − | * [http://www.sciencedirect.com/science/article/B6VH3-4SMNY0J-1/2/4a88e04ab0cac2c4069c19ac12c2c42f New Directions: The impact of oceanic iron fertilisation on cloud condensation nuclei]: Matthew T. Woodhouse, Graham W. Mann, Kenneth S. Carslaw, Olivier Boucher, New Directions: The impact of oceanic iron fertilisation on cloud condensation nuclei, Atmospheric Environment, Volume 42, Issue 22, July 2008, Pages 5728-5730, ISSN 1352-2310, DOI: 10.1016/j.atmosenv.2008.05.005. |
||
| − | |||
| − | ==2007== |
||
| − | |||
| − | * [http://www.agu.org/pubs/crossref/2007/2006GL028668.shtml Regional and global trends in sulfate aerosol since the 1980s]: Manktelow, P. T., G. W. Mann, K. S. Carslaw, D. V. Spracklen, and M. P. Chipperfield (2007), Regional and global trends in sulfate aerosol since the 1980s, Geophys. Res. Lett., 34, L14803, doi:10.1029/2006GL028668. |
||
| − | * [http://www.atmos-chem-phys.net/7/2073/2007/acp-7-2073-2007.html Evaluation of a global aerosol microphysics model against size-resolved particle statistics in the marine atmosphere]: Spracklen, D. V., Pringle, K. J., Carslaw, K. S., Mann, G. W., Manktelow, P., and Heintzenberg, J.: Evaluation of a global aerosol microphysics model against size-resolved particle statistics in the marine atmosphere, Atmos. Chem. Phys., 7, 2073-2090, 2007. |
||
Revision as of 10:07, 19 April 2012
Model Optimisation
The cost of the Stratosphere-Troposphere chemistry scheme in UKCA using the Newton-Raphson solver with the on-line photolysis scheme Fast-jX relative to the climate model HadGEM3-A is as follows:
| Model | PEs | OpenMP Threads | Time Elapsed (sec) |
|---|---|---|---|
| HadGEM3-A | 8x16 | 1 | 3798 |
| HadGEM3-A + StratTrop(N-R) + Fast-jX | 8x16 | 1 | 15602 |
| HadGEM3-A | 8x16 | 2 | 2328 |
| HadGEM3-A + StratTrop(N-R) + Fast-jX | 8x16 | 2 | 11730 |
On a 8x16 PE configuration and 1 OpenMP thread on the Monsoon facility or the Met Office's Power6 IBM (hpc1e/1f), UKCA and Fast-jX together add 310% to the cost of HadGEM3-A. However, with 2 OpenMP threads and no OpenMP compiler directives in UKCA, the relative cost of UKCA is even higher, adding approximately 400% to the cost of HadGEM3-A. Adding aerosol chemistry and UKCA-MODE aerosols will make it even more costly. Therefore, there is a clear need for optimisation.
As part of the HadGEM3-ES development project, currently being led by F. O'Connor, there are plans to do some optimisation work on UKCA. In particular, a more complete assessment of the model cost will be carried out and the potential speedup which may be gained from simple code re-writing, load balancing, and the use of OpenMP, dedicated I/O servers and maths libraries will be explored. Some scientific optimisation such as throwing out unwanted reactions (or species), tweaking chemistry to improve convergence, etc. should also be considered. The use of an alternative solver, such as a Rosenbrock solver, may also be investigated.
