Optical properties of long-range transported volcanic ash over Romania and Poland during Eyjafjallajökull eruption in 2010

• Autorzy: Nemuc A. , Stachlewska I.S. , Vasilescu J. , Górska A , Nicolae D , Talianu C

Identyfikatory

DOI

10.2478/s11600-013-0180-7

• Języki publikacji: EN

Abstrakty

EN

After Eyjafjallajökull volcano eruption on 14 April 2010, due to a complex air mass circulation, Romania was exposed to volcanic ash and its mixture with continental aerosols. Ash particles with an average Ångström (UV-VIS) exponent of 1.4 ± 0.2 and (VIS-IR) of 1.2 ± 0.3, a color ratio (VIS-UV) of 0.54 and (IR-VIS) of 0.49, an average particle depolarization value ~9.4%, and a lidar ratio of 50 sr were retrieved on 18 April from multiwavelength Raman lidar measurements in Bucharest. Mixed volcanic ash with mineral dust particles advected from Sahara, depolarization ~12%, Ångström (UV-VIS) exponent of 1.25 ± 0.25 and (VIS-IR) of 1.45 ± 0.25, an increased color ratio (VIS-UV) of 0.61, (IRVIS) of 0.39 and lidar ratio of 53 sr were identified on 28 April. From observations in Poland conducted by an elastic lidar at 532 nm and a ceilometer at 1064 nm we retrieved an average backscatter related Ångström (VIS-IR) exponent of 1.25 ± 0.35, and a color ratio (IR-VIS) of 0.53 in the layer at about 5.5 km during the night of 16/17 April, indicating fresh ash over Warsaw.

Słowa kluczowe

EN

lidar; ceilometer; volcanic ash; mineral dust

PL

LIDAR; ceilometr; pył wulkaniczny; pył mineralny

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2014
• Tom: Vol. 62, no. 2
• Strony: 350--366
• Opis fizyczny: Bibliogr. 32 poz.

Twórcy

autor

Nemuc A.

• National Institute of R&D for Optoelectronics Romania

autor

Stachlewska I.S.

• Institute of Geophysics, Faculty of Physics, University of Warsaw (IGFUW), Warsaw, Poland

autor

Vasilescu J.

• National Institute of R&D for Optoelectronics Romania

autor

Górska A

• Institute of Geophysics, Faculty of Physics, University of Warsaw (IGFUW), Warsaw, Poland

autor

Nicolae D

• National Institute of R&D for Optoelectronics Romania

autor

Talianu C

• National Institute of R&D for Optoelectronics Romania

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