Naslov
Wrf-Chem simulations of Saharan dust outbreak episode at North Adriatic

Autori
Mifka, Boris ; Alebić-Juretić, Ana ; Barth, Mary ; Džepina, Katja ; Hodžić, Alma ; Kumar, Rajesh ; Madronich, Sasha ; Saide, Pablo ; Telišman Prtenjak, Maja ; Wiedinmyer, Christine

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Air Quality Modelling : WRF-Chem Workshop : abstracts / - , 2018

Skup
Air Quality Modelling : WRF-Chem Workshop

Mjesto i datum
Istanbul, Turska, 03.05.2018. - 04.05.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
WRF-Chem ; Saharan dust ; PM10 ; Aerosol Optical Depth ; tuning coefficients ; MOZCART ; MOZART-MOSAIC

Sažetak
Croatian Northern Adriatic is an area lacking information on aerosol chemical composition including its organic aerosol chemical composition due to the lack of state-of-the-art measurements and modeling. Understanding the ambient concentrations of Croatian Northern Adriatic aerosol and their sources and transformations also has regional significance for air quality affecting all Adriatic Sea countries (Italy, Slovenia, Croatia, Montenegro and Albania) and Mediterranean region. Significant increase of the PM10 was observed in the summer of 2015 from September 14 – 19 during 5-weeks daily, continuous off-line aerosol sampling with High Volume Air Samplers in the city of Rijeka, Croatia. The same increase in aerosol ambient concentrations was recorded at the several ground based measurement stations in city of Rijeka wider area. Regionally, similar increase in PM10 was measured at the several background stations operated by Italian Regional Environmental Protection Agency of region Marche (ARPAM). Increase in Aerosol Optical Depth (AOD) up to 0.7 was measured by NASA MODIS instruments aboard the Terra and Aqua satellites over Tyrrhenian and Adriatic Sea and land area of Northern Italy and Croatia thus providing additional evidence of dust outbreak. To study the observed aerosol’s increase, we applied WRF-Chem 3.7.1 on-line with MOZART chemical mechanism in combination with two aerosol modules: MOZART-GOCART (chem_opt = 112) and MOZART-MOSAIC (chem_opt=201). Chemical boundary conditions were obtained from MOZART global model, anthropogenic emission sources (with anthro_emiss preprocessor) from EDGAR-HTAP data base and biogenic emissions from MEGAN model. Gaseous dry deposition was simulated by Wesely scheme. Despite the coarse WRF-Chem grid resolution, for both chemical options, preliminary results show high model skill in simulating PM10 when model results are compared to ground measurements in Italy and Croatia. WRF-Chem overestimates PM10 concentrations which is more pronounced when MOZART-GOCART option is applied. Further work will be based on verification of model AOD values with MODIS data and adjusting tuning coefficients to the surface dust emission flux in order to reduce the PM10 values overestimated by model.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Geofizika, Interdisciplinarne prirodne znanosti

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