Analysis of physical and biogeochemical control mechanisms on summertime surface carbonate system variability in the western Ross Sea (Antarctica) using in situ and satellite data

In this study, carbonate system properties were measured in the western Ross Sea (Antarctica) over the 2005–2006 and 2011–2012 austral summers with the aim of analysing their sensitivity to physical and biogeochemical drivers. Daily Advanced Microwave Scanning Radiometer 2 (AMSR2) sea ice concentration maps, obtained prior to and during the samplings, were used to analyse the sea ice evolution throughout the experiment periods. Monthly means and 8-day composite chlorophyll concentration maps from the Moderate-resolution Imaging Spectroradiometer (MODIS) Aqua satellite at 4-km resolution were used to investigate inter-annual and basin scale biological variability. Chlorophyll-a concentrations in surface waters estimated by MODIS satellite data contribute to descriptions of the variability of carbonate system properties in surface waters. Mean values of carbonate system properties were comparable across both investigated years; however, the 2012 data displayed larger variability. Sea ice melting also had a pivotal role in controlling the carbonate system chemistry of the mixed layer both directly through dilution processes and indirectly by favouring the development of phytoplankton blooms. This resulted in high pH and ΩAr, and in low CT, particularly in those areas where high chlorophyll concentration was shown by satellite maps

Biogeochemistry, grain size and mineralogy of the Central and Southern Adriatic Sea sediments: a review.

Volume 26 Supplement 1, January 2010

Dalla banca mista all'economia mista

A partire dalla recente pubblicazione dei 6 volumi sulla storia dell'IRI, il seminario intende proporre un aggiornamento su un dibattito già molto presente nella letteratura economica da più di un quarantennio. Ne discuteranno – in un incontro aperto a studiosi e studenti – Francesco Cesarini, Maestro di Discipline tecnico-bancarie dell'Università Cattolica di Milano, già Presidente di Banca Agricola Milanese, Banca Popolare di Milano, banco Ambrosiano Veneto e Unicredit; Pierluigi Ciocca, tra i maggiori esponenti della ricerca economica della Banca d'Italia, già a lungo membro del Direttorio della Banca d'Italia, e tra i principali protagonisti della storiografia economica italiana; Leandra D'antone, docente all'Università La Sapienza di Roma, studiosa del Mezzogiorno e della Storia Contemporanea, autrice di numerosi importanti contributi sulla storia dell'IRI e dei suoi personaggi, Beneduce e Menichella. Ci saranno anche interventi di Nicola De Ianni, autore della biografia del Ministro delle finanze dal 1932 al 1935, Guido Jung, e di Paolo Varvaro, docente di Storia dell'Italia del XX secolo e autore di saggi biografici su Nitti e Merzagora. Introduce i lavori il Direttore DISES, Tullio Jappelli, presiede Marilena Rispoli Farina, docente dell'Università di Napoli, storica del diritto del mercato finanziario e "pioniera" delle pubblicazioni sulla storia dell'IRI

Occurrence of PCPs in Natural Waters from Europe

In the framework of the study of emerging pollutants in the aquatic environment, personal care products (PCPs) play a relevant role as they are used in everyday life. They are continuously introduced into the natural water compartment, mainly through treated and untreated sewage but also via different pathways. This chapter describes the "state of the art" of the distribution and impact of PCPs on European natural waters (rivers, lakes, groundwater, drinking water, etc.). An extensive review of the recent literature has been carried out, gathering together the most relevant studies and presenting the results in five sections: fragrances, UV filters, detergents, preservatives, and repellents. In each section, data on the main molecules employed in PCP formulations are reported and compared. The physicochemical properties of many PCP compounds are summarized in the respective tables along with an additional table listing the measured concentrations of all PCPs detected in waters all over Europe

Seminari sulla Storia Economica del Calcio Italiano. Economia e Potere

Italo Cucci, Michele Fatica e Marco Impiglia discutono le vicende di quattro personaggi significativi nella Storia Economica del calcio italiano, a partire da quattro volumi biografici loro dedicati: Alberto Rognoni (di Italo Cucci), Fulvio Bernardini (di Marco Impiglia), Arpad Weisz (di Matteo Marani) e Italo Allodi (di Alessandro Tamburini)

Distribution of total alkalinity and pH in the Ross Sea (Antarctica) waters during austral summer 2008

Measurements of total alkalinity (AT) and pH were made in the Ross Sea in January–February 2008 in order to characterize the carbonate system in the Ross Sea and to evaluate the variability associated with different water masses. The main water masses of the Ross Sea, Antarctic Surface Water, High Salinity Shelf Water (HSSW), Deep Ice Shelf Water, Circumpolar Deep Water (CDW) and Antarctic Bottom Water, were identified on the basis of the physical and chemical data. In particular, the AT ranged between 2275 and 2374 µmol kg−1 with the lowest values in the surface waters (2275–2346 µmol kg−1), where the influence of the sea-ice melting and of the variability of the physical properties was significant. In the deep layers of the water column, the AT maxima were measured in correspondence to the preferential pathways of the spreading HSSW. The pH had variable values in the surface layer (7.890–8.033) with the highest values in Terra Nova Bay and Ross Sea polynyas. A low pH (7.969±0.025) traced the intrusion of the CDW in the Ross Sea shelf area. All samples revealed waters that were oversaturated with respect to both calcite and aragonite, but near corrosive levels of aragonite saturation state (Ω ca. 1.1–1.2) were associated with the entrainment of CDW over the slope. Aragonite undersaturation is of particular concern for the zooplankton species comprising to calcifying organisms such as pteropods. The partial pressure of CO2 at the sea surface was undersaturated with respect to the atmospheric value, particularly in Terra Nova Bay and the Ross Sea polynyas, but a large variability in the sea–air CO2 fluxes was observed associated with different responses in the strength of the biological and physical processes.Keywords: Total alkalinity; pH; saturation state; Terra Nova Bay polynya; Ross Sea(Published: 16 October 2014)Citation: Polar Research 2014, 33, 20403, http://dx.doi.org/10.3402/polar.v33.2040