Profili Verticali delle proprietà dell Aerosol e di Black Carbon in area Artica

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Dorothy Leonard
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1 Profili Verticali delle proprietà dell Aerosol e di Black Carbon in area Artica L. Ferrero a, D. Cappelletti b, B. Moroni b, V. Vitale c, R. Udisti d, G. Sangiorgi a, M.G. Perrone a, M. Busetto c, C. Lanconelli c, M. Mazzola c, A. Lupi c, S. Becagli d, R. Traversi d, D. Frosini d, M. Maturilli e, R. Neuber e, C. Ritter e, J. Graeser e, M. Fierz f, G. Mocnik g and E. Bolzacchini a a POLARIS research centre, DISAT, University of Milano-Bicocca, Piazza della Scienza 1, 20126, Milano, Italy. b DICA, University of Perugia, Via G. Duranti 93, Perugia, Italy. c ISAC CNR Viale Gobetti 101, 40129, Bologna, Italy. d University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence Italy. e Alfred-Wegener Institut für Polar- und Meeresforschung (AWI), Forschungsstelle Potsdam, Telegraphenberg 43A, Potsdam, Germany. f University of Applied Sciences Northwestern, Switzerland, Windisch, Switzerland. g Aerosol d.o.o., Kamniska 41, SI-1000 Ljubljana, Slovenia

2 Arctic Area Arctic Area: Ny-Ålesund at Svalbard Islands (Spring-Summer 2011). Aerosols affect Earth-Atmosphere climatic system due to their ability to scatter and absorb sunlight and act as CCN/IN (IPCC, 2007). NY- ÅLESUND The aforementioned processes are closely tied to aerosol location along the whole atmospheric column (Corrigan et al., 2008; Ramana et al., 2007; Podgorny and Ramanathan, 2001). Cooperative Investigation of Climate-Cryosphere Interaction (CICCI)

3 Ny-Ålesund Zeppelin (475 m) Gruvebadet Harbor Power plant

The Experimental Design Measurements were carried out with a tethered balloon fitted with an instrumentation Up to 1 km package consisting of: 1) OPC system (OPC GRIMM 1.

25 to 32 m) 2) a miniaturized electrical nanoparticle detector (minidisc) 3) a novel micro-aethalometer (AE51 and AE52 prototype, Magee Scientific) 4) a miniaturized cascade impactor (Sioutas SKC

4 The Experimental Design Measurements were carried out with a tethered balloon fitted with an instrumentation Up to 1 km package consisting of: 1) OPC system (OPC GRIMM 1.107; 31 size classes between 0.25 to 32 m) 2) a miniaturized electrical nanoparticle detector (minidisc) 3) a novel micro-aethalometer (AE51 and AE52 prototype, Magee Scientific) 4) a miniaturized cascade impactor (Sioutas SKC with 2 impaction stages: <1 μm, >1 μm) 5) a fast ozone monitor (2Btech) 6) a meteorological station (LSI-Lastem and Vaisala Tethersonde TTS 111). 40 m/min ~ 4 m res. During Spring (30 March 30 April): 84 aerosol (number size distribution, BC), meteorological and 57 ozone profiles. During Summer (30 June 15 July): 18 aerosol (number size distribution, BC), meteorological and ozone profiles. 9 particulate matter samples were also collected to determine aerosol chemical composition along height (IC analysis, UNIFI; SEM-EDS analysis, UNIPG).

5 Aerosol stratification 30/04/ /04/2011 ~75 % m AGL ~25 % 1 Stratification Stratification Zeppelin % Zeppelin % Frequency % Frequency %

6 Aerosol stratification Frequency distribution of the height of first aerosol stratification m AGL N<250 nm N nm N>1000 nm m AGL m AGL Frequency % Frequency % Frequency %

7 Spring case study 6 th APRIL 2011 A high concentration layer for nanoparticles was present below 200 m. Particle concentration rise up to ~ cm -3. Particles larger than 250 nm experienced a lower decrease at ~ m.

8 Spring case study

9 Dir ( N) Spring case study WS (m/s) Dir WS UTC Nanoparticles increase at ground. Concentrations increase from 69 cm -3 to 358 cm -3 and 832 cm -3. Contemporary decrease of Black carbon content in aerosol particles

10 Spring case study minidisc OPC Geometric Count Mean Diameter (CMD) on average was 0.14 ± 0.04 m. Geometric Standard Deviation (GSD) on average was 1.69 ± Ström et al. (2003)

11 Spring case study

12 Spring case study GRUVEBADET DATA (UNIFI ISAC-CNR)

13 Dir ( N) WS (m/s) Height (m AGL) Passengers Cruise July Ship Impact-1 6 July Dir ( N) WS 1400 Dir Dir WS UTC WS (m/s)

14 Ship Impact-2 Height (m AGL) RH (%) Theta RH Theta (K)

15 Ship Impact-3 BC concentration increased in agreement with nanoparticles and reached concentration up to 2000 ng/m 3 with an average value of 367 ng/m 3 Absorption coeff increased up to 12 Mm -1 with an average value of 2.2 Mm -1...during JJA 2011 ~57 days with ships...

16 Conclusions Vertical profiles are necessary to understand aerosol properties along height. They were used to: Identify aerosol stratifications in function of size Evidence changes in aerosol concentration, sizes and chemistry related to possible spring nucleation events To assess the impact of shipping emission in Polar region

17 Thank you for your attention! Acknowledgements Thanks to Italian CNR, to AWI and to CICCI project.

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