EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Patterns of PBL hight during 1989-2019 over Romania, Moldavia Region using ERA5 data and correlation with NAO index.

Apetroaie Cosmina1,2, Bostan Diana-Corina2, Timofte Adrian2, Miclăuș Ingrid-Mihaela2, and Cazacu Marius-Mihai3
Apetroaie Cosmina et al.
  • 1Alexandru Ioan Cuza University of Iasi, Faculty of Geography and Geology, Blvd. Carol I, No. 20 A, Iasi, Romania (
  • 2National Meteorological Administration, Bacău Regional Forecast Center, Timpului Street, No 3, 600234, Bacău, Romania (
  • 3Gheorghe Asachi Technical University of Iasi, Department of Physics, Bd-ul Dimitrie Mangeron nr. 67, Corp T, Iasi, 700050, Romania (

The evolution of the Planetary Boundary Layer Height (PBLH) is a very important meteorological parameter because most of the population carries out their socio-economic activities inside this layer and because it has a significant impact on weather events and air quality. This parameter is influenced by energy and mass exchanges between the land surface and the atmosphere. In our study, hourly PBLH data were used over a period of 30 years (1989-2018), for the warm season (May, June, July, August and September). The data we used comes from the ECMWF (European Centre for Medium-Range Weather Forecasts) database, ERA5. By means of Open GrADS (The Grid Analysis and Display System), the PBLH deviations were graphically represented and interpreted. On the other hand, the NAO (The North Atlantic Oscillation) has influences over the climate variability and weather worldwide. It is well known that NAO exhibits considerable variability throughout a season and during a year, as well, and prolonged periods (for a few months) of both positive and negative phases of the pattern are ordinary. Both the PBLH variations and the NAO index can have an impact on the weather and climate conditions. In this study we will present the patterns of PBLH during 1989-2019 and correlations between the NAO index and the variability of the monthly summer PBLH in Moldavia Region, Romania.

How to cite: Cosmina, A., Diana-Corina, B., Adrian, T., Ingrid-Mihaela, M., and Marius-Mihai, C.: Patterns of PBL hight during 1989-2019 over Romania, Moldavia Region using ERA5 data and correlation with NAO index., EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-9568,, 2023.

Supplementary materials

Supplementary material file