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WFM 6311: Climate Change Risk Management

Akm Saiful Islam. WFM 6311: Climate Change Risk Management. Lecture-5c: Indices of Climate Extreme. Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET). December, 2012. Indices of Climate Extremes. Indices of Climate Extremes.

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WFM 6311: Climate Change Risk Management

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  1. Akm Saiful Islam WFM 6311: Climate Change Risk Management Lecture-5c: Indices of Climate Extreme Institute of Water and Flood Management (IWFM) Bangladesh University of Engineering and Technology (BUET) December, 2012

  2. Indices of Climate Extremes

  3. Indices of Climate Extremes Climate indices International/IPCC/national climate indices Calculating climate indices

  4. 1. Climate Indices Ott, W. 1978. Environmental Indices: Theory and Practice Indices are used to summarize and present a complex set of multivariate (several variables at the same time) changes so that the results can be easily understood and used in policy decisions made by non-specialists in the field.

  5. 400 Climate Indices ClimDex. 2001. ClimDex Version 3.1: User’s Guide. cccma.seos.uvic.ca/ETCCDMI/ClimDex/climdex-v1-3-users-guide.pdf Frich, P., L. V. Alexander, P. Della-Manta, B. Gleason, M. Haylock, A. M. G. Klein Tank and T. Peterson. 2002. Observed coherent changes in climatic extremes during the second half of the twentieth century. Clim. Res., 19:193-212. European Climate Assessment. 2008. European Climate Assessment and Dataset. eca.knmi.nl/ Klein Tank, A.M.G., J.B. Wijngaard, G.P. Können, R. Böhm, G. Demarée, A. Gocheva, M. Mileta, S. Pashiardis, L. Hejkrlik, C. Kern-Hansen, R. Heino, P. Bessemoulin, G. Müller-Westermeier, M. Tzanakou, S. Szalai, T. Pálsdóttir, D. Fitzgerald, S. Rubin, M. Capaldo, M. Maugeri, A. Leitass, A. Bukantis, R. Aberfeld, A.F.V. van Engelen, E. Forland, M. Mietus, F. Coelho, C. Mares, V. Razuvaev, E. Nieplova, T. Cegnar, J. Antonio López, B. Dahlström, A. Moberg, W. Kirchhofer, A. Ceylan, O. Pachaliuk, L.V. Alexander, and P. Petrovic, 2002. Daily dataset of 20th-century surface air temperature and precipitation series for the European Climate Assessment. Int. J. Climatol., 22, 1441-1453. Kiktev, D., D. Sexton, L. Alexander and C. Folland. 2003. Comparison of modelled and observed trends in indicators of daily climate extremes. J. Clim., 16, 3560-71. Stardex. 2008. Statistical and Regional dynamical Downscaling of Extremes for European regions. www.cru.uea.ac.uk/projects/stardex Bonsal, B.R., X. Zhang, L.A. Vincent and W.D. Hogg. 2001. Characteristics of daily and extreme temperatures over Canada. Journal of Climate 14 :1959-1976. Klein Tank, A.M.G. and G.P. Können, 2003. Trends in indices of daily temperature and precipitation extremes in Europe, 194699. J. Climate, 16, 3665-3680.

  6. 2. International/IPCC/National Climate Indices International - WMO CCl/CLIVAR/JCOMM 27 Climate Indices • Xuebin Zhang Environment Canada • Uses free statistical package “R” • Does QC, homogeneity testing and creates 27 indices http://cccma.seos.uvic.ca/ETCCDMI/

  7. IPCC

  8. NationalGachon Indices of Climate Extremes 18 indices for extreme temperature and precipitation for Canadian regions • must represent regional Canadian climate conditions; • must be relevant to climate change impact studies; and • must be adapted to the main characteristics of climate conditions at the regional scale. “providing a good mix of information – precipitation indices characterize the frequency, intensity, length of dry spells, magnitude and occurrence of wet extremes while temperature indices refer to variability, season lengths and cold and warm extremes in terms of magnitude, occurrence and duration.”

  9. Gachon Indices of Climate Extremes

  10. Gachon Indices of Climate Extremes

  11. 3. Calculating Climate Indices An example – 3 day Max P • Create worksheet 3 day Max P • Select Date and Ptotal columns from 20-year climate dataset • Cut and Paste into new worksheet

  12. Name new column 3 day sum In cell C4, add 3 days P using sum feature

  13. Pull lower right corner down column to calculate remainder of column

  14. Identify max for each season Use template from CCCSN website (training area) to fill

  15. Put all years together

  16. View data as chart

  17. RClimDex – A Tool for calculating 27 indices

  18. RClimDex

  19. Define Parameter

  20. Indices

  21. APPENDIX B: Input Data Format • All of the data files that are read or written are in list formatted format. The exception is the very first data file that is processed in the “ Quality Control” step. This input data file has several requirements: • ASCII text file • Columns as following sequences: Year, Month, Day, PRCP, TMAX, TMIN. (NOTE: PRCP units = millimeters and Temperature units= degrees Celsius) • The format as described above must be space delimited (e.g. each element separated by one or more spaces). • For data records, missing data must be coded as -99.9; data records must be in calendar date order. Missing dates allowed. • Example data Format for the initial data file (e.g. used in the ‘Quality Control’ step): Example data Format for the initial data file (e.g. used in the ‘Quality Control’ step): 1901 1 1 -99.9 -3.1 -6.8 1901 1 2 -99.9 -1.3 -3.6 1901 1 3 -99.9 -0.5 -7.9 1901 1 4 -99.9 -1 -9.1 1901 1 7 -99.9 -1.8 -8.4

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