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20TH INTERNATIONAL MULTIDISCIPLINARY SCIENTIFIC GEOCONFERENCE SGEM 2020 (ENERGY AND CLEAN TECHNOLOGIES) Albena, 18–24 августа 2020 года

2020

10.5593/sgem2020/4.1/s19.066

The Indian Ocean Dipole (IOD) signature in European summertime surface air temperature (SAT) and sea level pressure (SLP) fields were investigated in this study. The SAT and SLP anomalies of the surface fields over the European region associated with the IOD variability are described based on the results of experiments with atmospheric general circulation model and re-analysis data. It is shown that the prevalent positive significant SAT/SLP anomaly tends to form over Central/Eastern Europe in the negative phase of the IOD events. That accompanied by weak and insignificant negative SAT/SLP anomalies in July-August over Western Europe. The opposite anomalies in sign have appeared in the positive IOD phase. The ensemble simulation gave evidence that the European summertime atmospheric response carries the nonlinear effect on stepping up the values of SST IOD anomalies in the Indian Ocean. The composite difference between the negative and positive phases of the IOD, constructed based on the re-analysis of 20CR data, generally confirms the described simulation results of the ensemble climate model for the SAT/SLP fields...

SURFACE AIR TEMPERATURE, SEA LEVEL PRESSURE ANOMALIES, INDIAN OCEAN DIPOLE TELECONNECTION, EUROPEAN REGION, ATMOSPHERIC GENERAL CIRCULATION MODEL

2020-09-08 11:12:19 (квартал- III)