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2. Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)

Author

Caiazzo, L., Baccolo, G., Barbante, C., Becagli, S., Bertò, M., Ciardini, V., Crotti, I., Delmonte, B., Dreossi, G., Frezzotti, M., Gabrieli, J., Giardi, F., Han, Y., Hong, S.-B., Hur, S.D., Hwang, H., Kang, J.-H., Narcisi, B., Proposito, M., Scarchilli, C., Selmo, E., Severi, M., Spolaor, A., Stenni, B., Traversi, R., and Udisti, R.

Published
2017
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4. Annual Changes of Aerosol Optical Depth and Ångström Exponent over Spitsbergen

Author

Pakszys, P., Zielinski, T., Markowicz, K., Petelski, T., Makuch, P., Lisok, J., Chilinski, M., Rozwadowska, A., Ritter, Ch., Neuber, R., Udisti, R., Mazzola, M., Rowiński, Paweł, Editor-in-chief, Banaszkiewicz, Marek, Series editor, Pempkowiak, Janusz, Series editor, Lewandowski, Marek, Series editor, Sarna, Marek, Series editor, Zielinski, Tymon, editor, Weslawski, Marcin, editor, and Kuliński, Karol, editor

Published
2015
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29. Changes in environment over the last 800,000 years from chemical analysis of the EPICA Dome C ice core

Author

Wolff, E.W., Barbante, C., Becagli, S., Bigler, M., Boutron, C.F., Castellano, E., de Angelis, M., Federer, U., Fischer, H., Fundel, F., Hansson, M., Hutterli, M., Jonsell, U., Karlin, T., Kaufmann, P., Lambert, F., Littot, G.C., Mulvaney, R., Röthlisberger, R., Ruth, U., Severi, M., Siggaard-Andersen, M.L., Sime, L.C., Steffensen, J.P., Stocker, T.F., Traversi, R., Twarloh, B., Udisti, R., Wagenbach, D., and Wegner, A.

Published
2010
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37. One-to-one coupling of glacial climate variability in Greenland and Antarctica

Author

Barbante, C., Barnola, J.-M., Becagli, S., Beer, J., Bigler, M., Boutron, C., Blunier, T., Castellano, E., Cattani, O., Chappellaz, J., Dahl-Jensen, D., Debret, M., Delmonte, B., Dick, D., Falourd, S., Faria, S., Federer, U., Fischer, H., Freitag, J., Frenzel, A., Fritzsche, D., Fundel, F., Gabrielli, P., Gaspari, V., Gersonde, R., Graf, W., Grigoriev, D., Hamann, I., Hansson, M., Hoffmann, G., Hutterli, M. A., Huybrechts, P., Isaksson, E., Johnsen, S., Jouzel, J., Kaczmarska, M., Karlin, T., Kaufmann, P., Kipfstuhl, S., Kohno, M., Lambert, F., Lambrecht, Anja, Lambrecht, Astrid, Landais, A., Lawer, G., Leuenberger, M., Littot, G., Loulergue, L., Luthi, D., Maggi, V., Marino, F., Masson-Delmotte, V., Meyer, H., Miller, H., Mulvaney, R., Narcisi, B., Oerlemans, J., Oerter, H., Parrenin, F., Petit, J.-R., Raisbeck, G., Raynaud, D., Rothlisberger, R., Ruth, U., Rybak, O., Severi, M., Schmitt, J., Schwander, J., Siegenthaler, U., Siggaard-Andersen, M.-L., Spahni, R., Steffensen, J. P., Stenni, B., Stocker, T. F., Tison, J.-L., Traversi, R., Udisti, R., Valero-Delgado, F., van den Broeke, M. R., van de Wal, R. S. W., Wagenbach, D., Wegner, A., Weiler, K., Wilhelms, F., Winther, J.-G., and Wolff, E.

Abstract

Author(s): EPICA Community Members; EPICA Community Members; C. Barbante [1, 2]; J.-M. Barnola [3]; S. Becagli [4]; J. Beer [5]; M. Bigler [6, 7]; C. Boutron [3]; T. Blunier [6]; [...]

Published
2006
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38. Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles

Author

Wolff, E. W., Fischer, H., Fundel, F., Ruth, U., Twarloh, B., Littot, G. C., Mulvaney, R., Rothlisberger, R., de Angelis, M., Boutron, C. F., Hansson, M., Jonsell, U., Hutterli, M. A., Lambert, F., Kaufmann, P., Stauffer, B., Stocker, T. F., Steffensen, J. P., Bigler, M., Siggaard-Andersen, M. L., Udisti, R., Becagli, S., Castellano, E., Severi, M., Wagenbach, D., Barbante, C., Gabrielli, P., and Gaspari, V.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): E. W. Wolff (corresponding author) [1]; H. Fischer [2]; F. Fundel [2]; U. Ruth [2]; B. Twarloh [2]; G. C. Littot [1]; R. Mulvaney [1]; R. Rothlisberger [1]; M. [...]

Published
2006
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40. Prominent features in isotopic, chemical and dust stratigraphies from coastal East Antarctic ice sheet (Eastern Wilkes Land)

Author

Caiazzo, L, Baccolo, G, Barbante, C, Becagli, S, Bertò, M, Ciardini, V, Crotti, I, Delmonte, B, Dreossi, G, Frezzotti, M, Gabrieli, J, Giardi, F, Han, Y, Hong, S, Hur, S, Hwang, H, Kang, J, Narcisi, B, Proposito, M, Scarchilli, C, Selmo, E, Severi, M, Spolaor, A, Stenni, B, Traversi, R, Udisti, R, Udisti, R., DELMONTE, BARBARA, Caiazzo, L, Baccolo, G, Barbante, C, Becagli, S, Bertò, M, Ciardini, V, Crotti, I, Delmonte, B, Dreossi, G, Frezzotti, M, Gabrieli, J, Giardi, F, Han, Y, Hong, S, Hur, S, Hwang, H, Kang, J, Narcisi, B, Proposito, M, Scarchilli, C, Selmo, E, Severi, M, Spolaor, A, Stenni, B, Traversi, R, Udisti, R, Udisti, R., and DELMONTE, BARBARA

Abstract

In this work we present the isotopic, chemical and dust stratigraphies of two snow pits sampled in 2013/14 at GV7 (coastal East Antarctica: 70°41′ S - 158°51′ E, 1950 m a.s.l.). A large number of chemical species are measured aiming to study their potentiality as environmental changes markers. Seasonal cluster backward trajectories analysis was performed and compared with chemical marker stratigraphies. Sea spray aerosol is delivered to the sampling site together with snow precipitation especially in autumn-winter by air masses arising from Western Pacific Ocean sector. Dust show maximum concentration in spring when the air masses arising from Ross Sea sector mobilize mineral dust from ice-free areas of the Transantarctic mountains. The clear seasonal pattern of sulfur oxidized compounds allows the dating of the snow-pit and the calculation of the mean accumulation rate, which is 242 ± 71 mm w.e. for the period 2008–2013. Methanesulfonic acid and NO3− do not show any concentration decreasing trend as depth increases, also considering a 12 m firn core record. Therefore these two compounds are not affected by post-depositional processes at this site and can be considered reliable markers for past environmental changes reconstruction. The rBC snow-pit record shows the highest values in summer 2012 likely related to large biomass burning even occurred in Australia in this summer. The undisturbed accumulation rate for this site is demonstrated by the agreement between the chemical stratigraphies and the annual accumulation rate of the two snow-pits analysed in Italian and Korean laboratories.

Published
2017

42. A Combined Observational and Modeling Approach to Study Modern Dust Transport from the Patagonia Desert to East Antarctica

Author

Gasso, S, Stein, A, Marino, F, Castellano, E, Udisti, R, and Ceratto, J

Subjects
Geophysics
Abstract

The understanding of present atmospheric transport processes from Southern Hemisphere (SH) landmasses to Antarctica can improve the interpretation of stratigraphic data in Antarctic ice cores. In addition, long range transport can deliver key nutrients normally not available to marine ecosystems in the Southern Ocean and may trigger or enhance primary productivity. However, there is a dearth of observational based studies of dust transport in the SH. This work aims to improve current understanding of dust transport in the SH by showing a characterization of two dust events originating in the Patagonia desert (south end of South America). The approach is based on a combined and complementary use of satellite retrievals (detectors MISR, MODIS, GLAS ,POLDER, OMI,), transport model simulation (HYSPLIT) and surface observations near the sources and aerosol measurements in Antarctica (Neumayer and Concordia sites). Satellite imagery and visibility observations confirm dust emission in a stretch of dry lakes along the coast of the Tierra del Fuego (TdF) island (approx.54deg S) and from the shores of the Colihue Huapi lake in Central Patagonia (approx.46deg S) in February 2005. Model simulations initialized by these observations reproduce the timing of an observed increase in dust concentration at the Concordia Station and some of the observed increases in atmospheric aerosol absorption (here used as a dust proxy) in the Neumayer station. The TdF sources were the largest contributors of dust at both sites. The transit times from TdF to the Neumayer and Concordia sites are 6-7 and 9-10 days respectively. Lidar observations and model outputs coincide in placing most of the dust cloud in the boundary layer and suggest significant de- position over the ocean immediately downwind. Boundary layer dust was detected as far as 1800 km from the source and approx.800 km north of the South Georgia Island over the central sub-Antarctic Atlantic Ocean. Although the analysis suggests the presence of dust at approx.1500 km SW of South Africa five days after, the limited capabilities of existing satellite platforms to differentiate between aerosol types do not permit a definitive conclusion. In addition, the model simulations show dust lifting to the free troposphere as it travels south but it could not be confirmed by the satellite observations due to cloudiness. This work demonstrates that complementary information from existing transport models, satellite and surface data can yield a consistent picture of the dust transport from the Patagonia desert to Antarctica. It also illustrates the limitation of using any of these approaches individually to characterize the transport of dust in a heavily cloudy area.

Published
2010
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48. Vertical profiles of aerosol and black carbon in the Arctic: A seasonal phenomenology along 2 years (2011-2012) of field campaigns

Author

Ferrero, L, Cappelletti, D, Busetto, M, Mazzola, M, Lupi, A, Lanconelli, C, Becagli, S, Traversi, R, Caiazzo, L, Giardi, F, Moroni, B, Crocchianti, S, Fierz, M, Mocnik, G, Sangiorgi, G, Perrone, M, Maturilli, M, Vitale, V, Udisti, R, Bolzacchini, E, FERRERO, LUCA, Cappelletti D, Busetto M, Mazzola M, Lupi A, Lanconelli C, Becagli S, Traversi R, Caiazzo L, Giardi F, Moroni B, Crocchianti S, Fierz M, Mocnik G, SANGIORGI, GIORGIA MAURA LUISA, PERRONE, MARIA GRAZIA, Maturilli M, Vitale V, Udisti R, BOLZACCHINI, EZIO, Ferrero, L, Cappelletti, D, Busetto, M, Mazzola, M, Lupi, A, Lanconelli, C, Becagli, S, Traversi, R, Caiazzo, L, Giardi, F, Moroni, B, Crocchianti, S, Fierz, M, Mocnik, G, Sangiorgi, G, Perrone, M, Maturilli, M, Vitale, V, Udisti, R, Bolzacchini, E, FERRERO, LUCA, Cappelletti D, Busetto M, Mazzola M, Lupi A, Lanconelli C, Becagli S, Traversi R, Caiazzo L, Giardi F, Moroni B, Crocchianti S, Fierz M, Mocnik G, SANGIORGI, GIORGIA MAURA LUISA, PERRONE, MARIA GRAZIA, Maturilli M, Vitale V, Udisti R, and BOLZACCHINI, EZIO

Abstract

We present results from a systematic study of vertical profiles of aerosol number size distribution and black carbon (BC) concentrations conducted in the Arctic, over Ny-Ålesund (Svalbard). The campaign lasted 2 years (2011-2012) and resulted in 200 vertical profiles measured by means of a tethered balloon (up to 1200 m a.g.l.) during the spring and summer seasons. In addition, chemical analysis of filter samples, aerosol size distribution and a full set of meteorological parameters were determined at ground. The collected experimental data allowed a classification of the vertical profiles into different typologies, which allowed us to describe the seasonal phenomenology of vertical aerosol properties in the Arctic. During spring, four main types of profiles were found and their behavior was related to the main aerosol and atmospheric dynamics occurring at the measuring site. Background conditions generated homogenous profiles. Transport events caused an increase of aerosol concentration with altitude. High Arctic haze pollution trapped below thermal inversions promoted a decrease of aerosol concentration with altitude. Finally, ground-based plumes of locally formed secondary aerosol determined profiles with decreasing aerosol concentration located at different altitude as a function of size. During the summer season, the impact from shipping caused aerosol and BC pollution plumes to be constrained close to the ground, indicating that increasing shipping emissions in the Arctic could bring anthropogenic aerosol and BC in the Arctic summer, affecting the climate.

Published
2016

49. Size distribution and ion composition of aerosol collected at Ny-Ålesund in the spring–summer field campaign 2013

Author

Giardi, F, Becagli, S, Traversi, R, Frosini, D, Severi, M, Caiazzo, L, Ancillotti, C, Cappelletti, D, Moroni, B, Grotti, M, Bazzano, A, Lupi, A, Mazzola, M, Vitale, V, Abollino, O, Ferrero, L, Bolzacchini, E, Viola, A, Udisti, R, Udisti, R., FERRERO, LUCA, BOLZACCHINI, EZIO, Giardi, F, Becagli, S, Traversi, R, Frosini, D, Severi, M, Caiazzo, L, Ancillotti, C, Cappelletti, D, Moroni, B, Grotti, M, Bazzano, A, Lupi, A, Mazzola, M, Vitale, V, Abollino, O, Ferrero, L, Bolzacchini, E, Viola, A, Udisti, R, Udisti, R., FERRERO, LUCA, and BOLZACCHINI, EZIO

Abstract

During the 2013 Arctic campaign, direct measurements and size-segregated samplings of atmospheric aerosol were carried out from March to September at the Gruvebadet observatory in Ny-Ålesund (78°56′N, 11°56′E; Svalbard Islands). Continuous size distribution measurements (104 size classes) were performed both in the nano- (TSI-SMPS system) and micro-metric (TSI-APS device) range with a resolution of 10 min. Aerosol sampling was carried out on daily basis (PM10 fraction, 00:01–23:59 UTC) and with a 4-day resolution (four-stage cascade impactor). A back-trajectory analysis was performed for specific events to understand transport processes and possible source areas of aerosol reaching Ny-Ålesund. Aerosol samples were analyzed for ion composition (inorganic cations and anions, selected organic anions) by a three-chromatograph system after extraction in ultra-sonic bath. Special attention was spent in identifying and interpreting the seasonal pattern of natural and anthropic chemical markers. Sea spray aerosol was evenly distributed along all the sampling period with maxima related to wind speed. Its size distribution peaks in 1.0–2.5 or 2.5–10 µm, depending on the transport conditions and distance from source areas. Anthropic sulfate dominates the spring aerosol load (Arctic Haze), both in acidic form (H2SO4) and in partially or totally neutralized ammonium salts. Biogenic contributions, marked by methanesulfonic acid, are relatively relevant in late spring–early summer and are distributed in the finest aerosol fraction (<1.0 µm).

Published
2016

50. Local vs. long-range sources of aerosol particles upon Ny-Ålesund (Svalbard Islands): mineral chemistry and geochemical records

Author

Moroni, B, Cappelletti, D, Ferrero, L, Crocchianti, S, Busetto, M, Mazzola, M, Becagli, S, Traversi, R, Udisti, R, Udisti, R., FERRERO, LUCA, Moroni, B, Cappelletti, D, Ferrero, L, Crocchianti, S, Busetto, M, Mazzola, M, Becagli, S, Traversi, R, Udisti, R, Udisti, R., and FERRERO, LUCA

Abstract

Aerosol samplings were performed both at ground level and at different heights upon the Ny-Ålesund polar station in June–July 2012 using a tethered balloon equipped with a sampling pump and meteorological sensors. The samples were analyzed by ion chromatography and scanning electron microscopy to characterize the sources and the evolution of the aerosol particles in the planetary boundary layer. The results show the main contribution of long-range over local/regional transported particles and sediments in the aerosols in the period of interest. Among the long-range sources, a main contribution was represented by Siberian local soils and regional wildfires which provided typical particles (metal oxides, calcareous grains), and ion species (nss-K+, nss-SO42−) to the aerosols. Among the local sources, a main contribution was represented by fly ash emitted by the cruise ships frequently landing around Ny-Ålesund during summer. Another aspect which results from aerosol particle characterization is the clear stratification of the planetary boundary layer upon Ny-Ålesund. This typical feature, which has been already documented in spring on the same site (Moroni et al. 2015), is quite effective also in summertime despite the higher potential of local dust production and the lower atmospheric stability characterizing this period.

Published
2016

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