Brussels, 6-7 March 2008 AEMET CONTRIBUTION TO WG4 COST733 AEMET CONTRIBUTION TO WG4 COST733 María Jesús Casado María Asunción Pastor Sub. Gral. Climatología.

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Brussels, 6-7 March 2008 AEMET CONTRIBUTION TO WG4 COST733 AEMET CONTRIBUTION TO WG4 COST733 María Jesús Casado María Asunción Pastor Sub. Gral. Climatología y Aplicaciones Spanish Meteorological Institute (AEMET)

Brussels, 6-7 March 2008 WG4:Testing methods for various applications Evaluation of Classifications Correlation between NAO and Circulation Types Influence of Circulation Types on Temperature and Precipitation over Iberian Peninsula

Brussels, 6-7 March 2008 OUTLINE Evaluation of 18 Classifications Impact of NAO over the circulation types Correlations between NAO Hurrell index and circulation types frequencies Influence of Circulation Types on Temperature and Precipitation over Iberian Peninsula Correlations of CTs frequencies with Prec, Tmax and Tmin over Iberian Peninsula Frequency and composite patterns

Brussels, 6-7 March 2008 Evaluation of Classifications As a first preliminary study, we analyze the behaviour of the classifications about the distribution of events, the mean lifetime, the percentage of time spending in events lasting 4 or more days and the number of 1-day events. 18 classifications have been considered for the D00 and D09 domains.

Brussels, 6-7 March 2008 COST733 DOMAINS

Brussels, 6-7 March Classifications D00-D09

Brussels, 6-7 March 2008

Some preliminary remarks HBGWL followed by EZ500C10 are the classifications with the higher percentage of time spent in events lasting 4 or more days. LITTC and LWT2 classifications turns out to be the shorter percentage of time spent in events lasting 4 or more days. Concerning the distribution of events, HBGWL behaves in a different way, because most of the classifications have a bigger number of 1-day events. Comparing the results between the both domains (D00 and D09), the most notorious feature concerns to PCACA classification which shows an increase in the mean residence and in the percentage of time spent in events longer than 4 days for D09.

Brussels, 6-7 March 2008 NAO index vs CTs frequencies The North Atlantic Oscillation (NAO) daily index of the extended winter period (DJFM) for 1957 to 2002 from the Climate Prediction Center (CPC) has been used to analyse the relationship of NAO phases with the Circulation Types of the selected classifications.

Brussels, 6-7 March 2008

Some preliminary remarks The frequency of some CTs is highly connected by the NAO phase. The largest frequency values are detected for NAO- for: HBGWL(CT14), 75% of the days OGWL (CT14,CT15), 60% of the days

Brussels, 6-7 March 2008 NAO Hurrell index vs CTs frequencies

Brussels, 6-7 March 2008

Statistical Significance Significant positive correlations at alpha=0.05 ESLPC10 (CT1) EZ500C10 (CT1) GWT (CT12) HBGWL (CT1,CT2,CT5,CT7,CT8,CT10) LITADVE (CT6,CT7,CT8) Strong positive correlations LITTC (CT17,CT18,CT19,CT20,CT21,CT22,CT23,CT24) LUND (CT1) LWT2 (CT6,CT7,CT15,CT16) OGWL (CT1,CT2,CT5,CT7,CT8,CT10) P27 (CT7,CT8,CT9,CT18) PCACA (CT2,CT6) PCAXTR (CT1,CT3,CT5) PCAXTRKM (CT1,CT3,CT10,CT14) PECZELY (CT8,CT9) PETISCO (CT3,CT9) SANDRA (CT8,CT15,CT16,CT17) TPCA07 (CT1) TPCAV (CT1,CT3,CT8,CT10) Significant negative correlations at alpha=0.05 ESLPC10 (CT4,CT6,CT9) EZ500C10 (CT3,CT6,C10) GWT (CT1,CT3) HBGWL (CT12,CT14,CT15,CT22,CT24,CT28) LITADVE (CT2,CT3,CT4) LITTC (CT4, CT5,CT6,CT7,CT8,CT9,CT10,CT11,CT12) LUND (CT9,CT10) LWT2 (CT3,CT4,CT9,CT10,CT11,CT12,CT18,CT19,CT20, CT21,CT22) OGWL (CT3,CT11,CT14,CT15,CT20,CT21,CT22,CT23,CT27,CT2 8) P27 (CT1,CT2,CT10,CT11,CT19,CT21,CT22) PCACA (CT4,CT5,CT11) PCAXTR (CT4,CT6,CT8,CT17) PCAXTRKM (CT6, CT17) PECZELY (CT3,CT4,CT6,CT10) PETISCO (CT11,CT12) SANDRA (CT5,CT11,CT14,CT18) TPCA07 (CT2,CT4) TPCAV (CT2,CT4,CT5,CT7)

Brussels, 6-7 March 2008

Statistical Significance Significant positive correlations at alpha=0.05 ESLPC10 (CT1) EZ500C10 (CT2,CT4,CT8) GWT (CT12) HBGWL (CT1,CT2,CT5,CT7,CT8,CT10) LITADVE (CT5) LITTC (CT3, CT9,CT12,CT15,CT18, CT21,CT27) LUND (CT4) LWT2 (CT1,CT2,CT20) OGWL (CT1,CT2,CT5,CT7,CT8,CT10) P27 (CT1,CT2,CT3,CT6,CT11,CT12) PCACA (CT4) PCAXTR (CT2,CT5,CT9) PCAXTRKM (CT5,CT9) PECZELY (CT8,CT9) PETISCO (CT8,CT9) SANDRA (CT10,CT12,CT14) TPCA07 (CT6) TPCAV (CT2,CT6,CT7) Significant negative correlations at alpha=0.05 ESLPC10 (CT4,CT6,CT9) EZ500C10 (CT1) GWT (CT1,CT3) HBGWL (CT12,CT14,CT15,CT22,CT24,CT28) LITADVE (CT8) LITTC (CT1,CT7,CT10,CT16,CT19,CT22,CT23,CT25) LUND (CT3,CT10) LWT2 (CT15,CT18, CT22,CT23,CT24) OGWL (CT3,CT11,CT14,CT15,CT20,CT21,CT22,CT23,CT27,CT2 8) P27 (CT17,CT18,CT25,CT26,CT27) PCACA (CT1) PCAXTR (CT1,CT3,CT10) PCAXTRKM (CT1,CT3,CT8) PECZELY (CT3,CT4,CT6,CT10) PETISCO (CT2,CT7,CT22,CT26) SANDRA (CT6,CT15,CT16,CT17,CT18,CT19) TPCA07 (CT5) TPCAV (CT1, CT5,CT9)

Brussels, 6-7 March 2008 Influence of Circulation Types on Temperature and Precipitation over Iberian Peninsula Daily gridded Tmax, Tmin and Prec data from INM Climatological Data Base. Temporal domain: extended winter (DJFM) from Spatial domain: Iberian Peninsula and Balearic Archipelago.

Brussels, 6-7 March 2008 Grid Points 203 grid points ( 50kmx60km )

Brussels, 6-7 March 2008 Description of datasets The data are calculated in a high-resolution grid, 203 grid-points, with a meridional and longitudinal distance of about 50 km and 60 km respectively. This grid has been prepared with data provided by the INM, interpolating daily data from available observatories located in the vicinity of the grid-points. The weighted mean of the data from the observatories was used as interpolation technique being the weights the inverses of the distances observatories/grid- points. For distances less than 10 km, they are treated as 10 km. As a result, the datum of each grid-point can be considered as an average of its area of influence. Alexandersson (SNHT) test for homogeneity has been applied.

Brussels, 6-7 March 2008 D00_PREC/CTs CORRELATIONS (green +, red -)

Brussels, 6-7 March 2008

D00_Tmax/CTs CORRELATIONS (green +, red -)

Brussels, 6-7 March 2008 D00_Tmin/CTs CORRELATIONS (green -, red +)

Brussels, 6-7 March 2008 Frequency and composite patterns

Brussels, 6-7 March 2008 PCACA_D09_DJFM_PREC P90 Int.: 0,1 P90 Int.: 1 mm/day FREQUENCY COMPOSITE

Brussels, 6-7 March 2008 PCACA_D09

Brussels, 6-7 March 2008 PCACA_D09_DJFM_Tmax red + anomalies blue - anomalies Int.: 0,5 P90 Int.: 0,1 FREQUENCY COMPOSITE

Brussels, 6-7 March 2008 PCACA_D09_DJFM_Tmin P10 Int.: 0,1 red + anomalies blue - anomalies Int.: 0,5 FREQUENCY COMPOSITE

Brussels, 6-7 March 2008 MANY THANKS FOR YOUR ATTENTION!