CPT Data Formats Simon J Mason simoniri columbia

CPT Data Formats Simon J. Mason simon@iri. columbia. edu International Research Institute for Climate and Society The Earth Institute of Columbia University SAWS Training Workshop on the Climate Predictability Tool (CPT) Pretoria, South Africa, 07 – 16 May, 2011

CPT Formats CPT can read three different types of data 1. Index data : indices have no single specific geographical location, e. g. the SOI; 2. Station data : stations have specific geographical locations, but are not normally distributed in a regular pattern 3. Gridded data : the latitudes and longitudes do not have to be evenly spaced; the grid points can be representative of area-averages or be point specific.

Date Formats YYYY-MM-DDTHH: MM 2012 -05 -10 T 09: 00 YYYY-MM-DD 2012 -05 -10 YYYY-MM 2012 -05 YYYY 2012 Start-date/End-date YYYY-MM-DD/DD 2012 -05 -06/12 YYYY-MM-DD/MM-DD 2012 -04 -30/05 -12 YYYY-MM-DD/YYYY-MM-DD 2011 -05 -11/2012 -05 -10 YYYY-MM/MM 2012 -04/06 YYYY-MM/YYYY-MM 2011 -08/2012 -07 YYYY/YYYY 2011/2020

Index Data xmlns: cpt=http: //iri. columbia. edu/CPT/v 10/ cpt: field=ENSO, cpt: nrow=5, cpt: ncol=10, cpt: col=index, cpt: row=T NINO 12 NINO 3. 4 NINO 4 1991 -01 -7. 04 E-02 0. 2694498 0. 5850401 0. 9240733 1992 -01 0. 9675602 1. 567671 1. 78421 0. 9166834 1993 -01 0. 2538059 0. 142204 0. 3976894 0. 8017575 1995 -01 1. 319356 0. 9692747 1. 051067 1. 088881 1996 -01 -0. 169409 -0. 5436825 -0. 7101253 -0. 1563722 1997 -01 -0. 2674479 -0. 6353493 -0. 325502 0. 3376727 1998 -01 3. 716633 3. 442826 2. 581284 1. 036142 1999 -01 -0. 3437423 -0. 8765103 -1. 365756 -1. 278136 2000 -01 -0. 4427198 -1. 439994 -1. 668904 -0. 9916633

Index Data xmlns: cpt=http: //iri. columbia. edu/CPT/v 10/ cpt: field=ENSO, cpt: nrow=5, cpt: ncol=8, cpt: col=index, cpt: row=T NINO 12 NINO 3. 4 NINO 4 1995 -01 0. 91 0. 73 1. 06 1. 04 1995 -02 0. 46 0. 51 1. 01 0. 76 1996 -01 -0. 58 -0. 65 -0. 22 -0. 77 1996 -02 -0. 26 -0. 64 -0. 43 -0. 85 1997 -01 -0. 75 -0. 91 0. 27 -0. 55 1997 -02 -0. 23 -0. 61 0. 32 -0. 33 1998 -01 3. 80 3. 32 0. 87 2. 59 1998 -02 3. 01 2. 57 0. 86 2. 17 Lagged fields: the same variable measured at a different time, but to be used as an additional predictor / predictand