Regional effects of ENSO in Central/Eastern Europe

El Niño - Southern Oscillation (ENSO) effects on the European circulation features and on the regional climate of Hungary are evaluated in this paper. European climate is represented by atmospheric macrocirculation patterns (MCPs). Local climate characteristics are linked to ENSO phases through regionally averaged temperature values and precipitation amounts. Significant statistical relationship was found between the European circulation and the ENSO phases. Furthermore, considerable differences were detected in the empirical frequency distribution of monthly climate anomalies in Hungary during El Niño and La Niña episodes

Comparison of Simulated Trends of Regional Climate Change in the Carpathian Basin for the 21st Century Using Three Different Emission Scenarios.

The present paper discusses the regional climate mo deling experiments for the 21st century for the Carpathian Basin using the model PR ECIS. The model PRECIS is a hydrostatic regional climate model with 25 km horizontal resolu tion developed at the UK Met Office, Hadley Centre. Simulated future changes – in mean climatic values, distributions and empirical probabilities – are analyzed for the period 2071–21 00 (compared to 1961–1990, as a reference period). Significant warming is projected at 0.05 l evel for all of the A2, A1B, and B2 scenarios, the largest warming is estimated in summer. Not onl y the mean value is likely to change, but also the distribution of daily mean temperature. By the end of the century the annual precipitation in the Carpathian Basin is likely to decrease, and the annual distribution of monthly mean precipitation is expected to change. Significant dr ying is projected in the region in summer, while in winter the precipitation is estimated to increas e

Budapest Ferencváros épület- és közterület-felújításainak hatása a hőmérsékleti viszonyokra

Kutatásaink során Budapest IX. kerületének felszínhőmérsékleti és hősziget-intenzitás viszonyait és változásait vizsgáltuk. A többféle alkalmazott módszer közül itt a 90 m térbeli felbontású ASTER műholdképek felhasználásával kapott eredményeinket mutatjuk be. Elemzéseink alapján a kerület nagyobb részben mesterséges burkolatú, valamint ipari területein egyértelműen magasabb intenzitás értékeket detektáltunk, mint a parkos zöld felületek esetén

Synoptic climatological analysis of the 2012-2013 winter

The 2012-2013 winter was unusual in the Carpathian region from several aspects. Especially the precipitation anomaly was very high. Our motivations are (i) to evaluate the series of synoptic patterns in late winter and early spring leading to these extremes, and (ii) to provide possible explanation of the physical processes behind them. The main characteristics of the dominant patterns are as follows: the jet-stream is nearly stationary above the Mediterranean region and Mediterranean cyclones formed frequently along the jet. According to the literature there is a link between the North Atlantic Oscillation (NAO), the Arctic Oscillation (AO), and the position and intensity of the jet-stream and these are also linked to the local weather conditions. First, we calculate correlation patterns between daily data of several elements near the surface and at different isobaric levels, and daily NAO and AO index values for 30 years (1981- 2010). Then, similar analysis is carried out for all the seasons and months