UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-23 17:54
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Conference: Bucharest University Faculty of Physics 2022 Meeting


Section: Atmosphere and Earth Science; Environment Protection


Title:
Multi-source analysis of air-mass and cloud properties over Romania during Cumbre Vieja Volcano eruption


Authors:
Denisa-Elena MOACA (1,2), Andreea CALCAN(2), Gabriela IORGA(1,3), Valeriu FILIP(1), Genica-Liliana SAFTOIU (GOLEA)(1,4), Denisa URLEA (5), Alex Florentin VLAD (2), Nicolae-Sorin VAJAIAC (2)


*
Affiliation:
1) Faculty of Physics, University of Bucharest, Măgurele, Romania

2) National Institute for Aerospace Research ”Elie Carafoli”, Bucharest, Romania

3) Faculty of Chemistry, University of Bucharest, Bucharest, Romania

4) Horia Hulubei National Institute for Physics and Nuclear Engineering, Măgurele, Romania

5) ROMATSA, Bucharest, Romania


E-mail
moaca.denisa@incas.ro


Keywords:
airborne measurements, cloud properties, volcano, CAPS


Abstract:
Volcanic ash particles play an important role in climate change because they can persist in the stratosphere and they are transported on long distances, thus being involved in most of the atmospheric dynamic processes. Modifying the atmospheric composition, they have a negative impact on air quality, climate and human health, visibility and they severely disrupt the air traffic. Moreover, the cloud formation and evolution are influenced by the interactions between volcanic ash and cloud particles. This study examined the impact of volcanic ash from Cumbre Vieja Volcano eruption on 27-29 September 2021 has on the cloud microstructural properties over the areas crossed by the air mass carrying the volcanic ash. The research was performed using a synergy of measurements and modelling techniques and methods airborne measurements, satellite, synoptic and numerical modelling data. Cloud properties, including number concentration, effective diameter and liquid water content were determined in situ by performing a research campaign during 27-29 September 2021 using a Hawker Beechcraft King Air C90GTx aircraft equipped with a cloud, aerosol and precipitation spectrometer (CAPS). Clouds and the Earth’s Radiant Energy System (CERES) database was used to extract additional information on cloud cover fraction, cloud types, cloud top temperature, cloud top pressure, height, and liquid water path in order to complement and compare with the airborne data. In addition, the volcanic ash transport over Romanian territory was studied using a hybrid single particle langrangian integrated trajectory model (HYSPLIT, [1]). The front characteristics, including temperature, wind direction, density and dew point were analyzed to establish the impact of volcanic ash particles on cloud properties and to characterize the air-mass containing volcanic matter.


References:

[1] Rolph, G., Stein, A., Stunder, B., 2017. Real-time environmental applications and display system: READY. Environ. Model. Software 95, 210–228.

Acknowledgement:
This research received support from NO Grants 2014-2021, under Project EEA-RO-NO-2019-0423, contract no 31/01.09.2020 and PNCDI III 1.2. Institutional performance, under Project ACTIVE-CAART, contract no 32 PFE/30.12.2021. Cloud properties were extracted from Clouds and the Earth’s Radiant Energy System (CERES) database (https://ceres.larc.nasa.gov/data/), last access on Aprilie 2022. NOAA Air Resources Laboratory is gratefully acknowledged for the use of HYSPLIT model https://www.ready.noaa.gov.