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October 1999 - October 2009
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Publications (129)
The study of aerosols in high mountain regions is essential because particulate matter can play a role in altering the energy balance of high mountain regions, and aerosols can accelerate glacier melting in high mountain areas by darkening the ice surface, reducing its reflectivity (albedo). Studying aerosols in high mountain areas provides insight...
In the Tano River Basin, groundwater serves as a crucial resource; however, its quantity and quality with regard to trace elements and microbiological loadings remain poorly understood due to the lack of groundwater logs and limited water research. This study presents a comprehensive analysis of the Tano River Basin, focusing on three key objective...
The study of aerosol in high mountain regions is essential because particulate matter can play a role in altering the energy balance of high mountain regions, and aerosols can accelerate glacier melting in high mountain areas by darkening the ice surface, reducing its reflectivity (albedo). Studying aerosols in high mountain areas provides insights...
The Col Margherita (MRG) Observatory is a high-altitude background station located in the Eastern Italian Alps. Its elevation and distance from major anthropogenic and natural sources make it ideal for monitoring baseline mercury levels and investigating its geochemical cycles. In this work, total gaseous mercury (TGM), ozone (O3) and meteorologica...
Iodine has a significant impact on promoting the formation of new ultrafine aerosol particles and accelerating tropospheric ozone loss, thereby affecting radiative forcing and climate. Therefore, understanding the long-term natural evolution of iodine, and its coupling with climate variability, is key to adequately assess its effect on climate on c...
Multi-element analyses determine the content of 17 trace elements (Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Cd, Cs, Ba, Pb, U) and 14 rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb, Lu, Y) in whey samples from cow and goat milk by inductively coupled plasma mass spectrometry and inductively coupled plasma-sector field mas...
Iron (Fe) is a key element in the Earth climate system, as it can enhance marine primary productivity in the high-nutrient low-chlorophyll (HNLC) regions where, despite a high concentration of major nutrients, chlorophyll production is low due to iron limitation. Eolian mineral dust represents one of the main Fe sources to the oceans; thus, quantif...
Iron is a key element in the Earth climate system as it can enhance the marine primary productivity in the High-Nutrient Low-Chlorophyll (HNLC) regions where, despite a high concentration of major nutrients, the chlorophyll production is low due to iron limitation. One of the main Fe sources to the ocean is Aeolian dust. For this reason, ice cores...
Atmospheric iodine chemistry has a large influence on the oxidizing capacity and associated radiative impacts in the troposphere. However, information on the evolution of past atmospheric iodine levels is restricted to the industrial period while its long-term natural variability remains unknown. The current levels of iodine in the atmosphere are c...
Atmospheric iodine chemistry has a large influence on oxidizing capacity and associated radiative impacts in the troposphere. However, information on the evolution of atmospheric iodine levels is restricted to the Industrial Period while its long-term natural variability remains unknown. The current levels of iodine in the atmosphere are controlled...
The high-altitude mountain monitoring station of the Institute for the Dynamics of Environmental Processes (IDPA) of the Italian National Research Council (CNR) is located in the Italian Eastern Alps at Col Margherita in the Dolomites above Belluno (2550 m a.s.l.). Set up in 2011 as part of the GMOS project (2010-2015) the Col Margherita site (MRG)...
In order to extract pollution signal of trace elements (TEs) in glacier snow at the Qinghai-Tibetan plateau of China by human activities, concentrations of 18 TEs (Al, Ti, Fe, Rb, Sr, Ba, V, Cr, Mn, Li, Cu, Co, Mo, Cs, Sb, Pb, Tl, and U), 14 rare earth elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), Y and Th in digested snow...
(...)Preliminary measurements showed Hg levels in the Eastern Alps and the differences in Hg concentrations compared to those observed at other remote sites existing in both Northern and Southern hemisphere. The use of the cold vapor atomic fluorescence spectrometry (CV-AFS) in both air and bulk deposition samples allows us to determine Hg at ultra...
Hardware and software technologies for data-logging and remote control of a monitoring station located in a remote area.
L'Istituto per la Dinamica dei Processi Ambientali (IDPA) del CNR gestisce un sito di misura di alta quota (Hight Altitude Station-HAS) in un'area remota a Col Margherita. La stazione di monitoraggio, accessibile dal passo San Pellegrino e dal passo Valles, situata nelle Dolomiti bellunesi a 2530 m sul livello del mare (latitudine +46 o 22' 2.11",...
In 2011 four ice cores were extracted from the summit of Alto dell'Ortles
(3859 m), the highest glacier of South Tyrol in the Italian Alps. This
drilling site is located only 37 km southwest from where the Tyrolean
Iceman, ∼ 5.3 kyrs old, was
discovered emerging from the ablating ice field of Tisenjoch (3210 m, near
the Italian–Austrian border) in...
Reconstructing the past variability of Arctic sea ice provides an essential context for recent multi-year sea ice decline, although few quantitative reconstructions cover the Holocene period prior to the earliest historical records 1,200 years ago. Photochemical recycling of bromine is observed over first-year, or seasonal, sea ice in so-called " b...
Polychlorinated biphenyls (PCBs) are among the main classes of persistent organic pollutants (POPs) and are largely distributed in every environmental compartment worldwide. The sources of PCB contamination are commonly associated to the industrial use of commercial mixtures, such as Aroclors, which were banned from production in 1979. However, dif...
Polychlorinated biphenyls (PCBs) are among the main classes of persistent organic pollutants (POPs) and are largely distributed in every environmental compartment worldwide. The sources of PCB contamination are commonly associated to the industrial use of commercial mixtures, such as Aroclors, which were banned from production in 1979. However, dif...
This study develops and validates a novel analytical approach for the simultaneous determination of 127 polychlorinated biphenyls (PCBs), together with 6 polychlorinated naphthalenes (PCNs) and 16 polycyclic aromatic hydrocarbons (PAHs). PCBs, PCNs, and PAHs were subjected to a unique pretreatment protocol and were simultaneously determined in a si...
The distributions of Ca, Cr, Fe, Co, Zn, Ga, Se, Rb, Ba, Tl, Bi, Th, U and rare-earth elements (REEs), measured by Inductively Coupled Plasma Sector Field Mass Spectrometry (ICP-SFMS) in ground natural waters characterized by near-acidic to alkaline pH (5.7 - 9.0), were evaluated to examine the major processes of water-rock interaction. Cluster ana...
In 2011 four ice cores were extracted from the summit of Alto dell'Ortles (3859 m), the highest glacier of South Tyrol in the Italian Alps. This drilling site is located only 37 km southwest from where the ~5.2 kyrs old Tyrolean Iceman was discovered emerging from the ablating ice field of Tisenjoch (3210 m, near the Italian-Austrian border) in 199...
Three analytical methods, namely, inductively coupled plasma sector field mass spectrometry (ICP-SFMS); inductively coupled plasma quadrupole mass spectrometry (ICP-QMS) and filter-furnace electrothermal atomic-absorption spectroscopy (FF-ET-AAS) for the determination of V, Mn, Ni, Cu, As, Sr, Mo, Cd and Pb in ground natural water samples were comp...
Polybrominated diphenyl ethers (PBDEs) are among the most important classes of additive brominated flame retardants (BFR). They have been identified in every compartment of aquatic ecosystems, from abiotic to biotic matrices, and in industrialized areas as well as in remote ones. PBDEs are persistent, highly bioaccumulative and can move up to high...
Polybrominated diphenyl ethers (PBDEs) are among the most important classes of additive brominated flame retardants (BFR). They have been identified in every compartment of aquatic ecosystems, from abiotic to biotic matrices, and in industrialized areas as well as in remote ones. PBDEs are persistent, highly bioaccumulative and can move up to high...
In this study, a novel analytical approach for the simultaneous determination of 127 polychlorinated biphenyls (PCBs), together with 6 polychlorinated naphthalenes (PCNs) and 16 polycyclic aromatic hydrocarbons (PAHs) was developed and validated.
The number of environmental contaminants which undergo legislation continues to increase, fostering the...
In this study, a novel analytical approach for the simultaneous determination of 127 polychlorinated biphenyls (PCBs), together with 6 polychlorinated naphthalenes (PCNs) and 16 polycyclic aromatic hydrocarbons (PAHs) was developed and validated.
The number of environmental contaminants which undergo legislation continues to increase, fostering the...
Ombrotrophic peatlands are remarkable repositories of high-quality climatic signals because their only source of nutrients is precipitation. Although several analytical techniques are available for analysing inorganic components in peat samples, they generally provide only low-resolution data sets. Here we present a new analytical approach for prod...
The atmospheric chemistry of iodine and bromine in Polar regions is of
interest due to the key role of halogens in many atmospheric processes,
particularly tropospheric ozone destruction. Bromine is emitted from the
open ocean but is enriched above first-year sea ice during springtime
bromine explosion events, whereas iodine emission is attributed...
The environmental radiation background has increased in the last century due to human nuclear activities and in this context 129I may be used to evaluate the anthropogenic contribution to global nuclear contamination. We present a fast and novel method for iodine-129 measurements. Coupling ion chromatography and inductively coupled plasma sector fi...
The atmospheric chemistry of iodine and bromine in polar regions is of interest due to the key role of halogens in many atmospheric processes, particularly tropospheric ozone destruction. Bromine is emitted from the open ocean but is enriched above first-year sea ice during springtime bromine explosion events, whereas iodine is emitted from biologi...
Remote regions such as Antarctica and Greenland have been studied for many years because of the treasure of important chemical information preserved in their pristine ice caps. Considering their geographical position, the influence of anthropogenic pollution of many chemical compounds can be detected by sophisticated analytical approaches to detect...
The atmospheric chemistry of iodine and bromine in polar regions is of interest due to the key role of halogens in many atmospheric processes, particularly tropospheric ozone destruction. Bromine is emitted from the open ocean but is enriched above first-year sea ice during springtime bromine explosion events, whereas iodine is emitted from biologi...
Paleoclimate and paleoenvironmental studies in the north-eastern Italian Alps have been hampered by the rarity of well-preserved high-altitude deposits and the lack of high-resolution multi-proxy records with adequate chronological control. This paper presents the first complete Late Glacial to Holocene peat succession from the Dolomites (Danta di...
Sea ice is an integral part of the earth’s climate system because it affects planetary albedo, sea-surface salinity, and the atmosphere–ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and the biological production of organoiodine from sea ice al...
Volcanic tephra are independent age horizons and can synchronize strata of various paleoclimate records in-cluding ice and sediment cores. The Holocene section of the Greenland Ice Core Project (GRIP) ice core is dated by multi-parameter annual layer counting, and contains peaks in acidity, SO 4 2− and microparticle concentrations at a depth of 429...
1] Iron deposition influences primary production and oceanic sequestration of atmospheric carbon dioxide (CO 2). Iron has two oxidation states, Fe(II) and Fe(III), with Fe(II) being more soluble and available for oceanic phytoplankton uptake. The past proportions of soluble iron in aerosol dust remain unknown. Here we present iron speciation (Fe 2+...
Bromine and iodine chemistry is extremely active at the sea ice margins
of both polar regions, with enhanced concentrations of BrO and IO in the
air column compared to the open ocean surface or snow-covered land.
So-called "Bromine explosions" occur principally over first-year sea ice
close to the sea ice edge, and are the major source of reactive...
Plutonium is present in the environment as a consequence of atmospheric nuclear tests carried out in the 1960s, nuclear weapons production and releases by the nuclear industry over the past 50 years. Approximately 6 tons of Pu-239 have been released into the environment as a result of 541 atmospheric weapon tests Nuclear Pu fallout has been studied...
Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for
the coastal Antarctic Talos Dome ice core, based on acid leachable Fe
concentrations. Fluxes of Fe to Talos Dome were consistently greater
than those at Dome C, with the greatest difference observed during
interglacial climates. We observe different Fe flux trends at Dome C and...
Sea ice is an integral part of the Earth's climate system because it affects planetary albedo, sea surface salinity, and the atmosphere-ocean exchange of reactive gases and aerosols. Bromine and iodine chemistry is active at polar sea ice margins with the occurrence of bromine explosions and the biological production of organo-iodine from sea ice a...
Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and...
Atmospheric fluxes of iron (Fe) over the past 200 kyr are reported for the coastal Antarctic Talos Dome ice core, based on acid leachable Fe concentrations. Fluxes of Fe to Talos Dome were consistently greater than those at Dome C, with the greatest difference observed during interglacial climates. We observe different Fe flux trends at Dome C and...
Volcanic tephra are indepenent age horizons and can synchronize strata of various pa- leoclimate records including ice and sediment cores. Before such paleoclimate records can be synchronized, it is essential to first confidently identify individual independent
5 marker horizons. The Greenland Ice Core Project (GRIP) ice core from Central Green-
la...
Ombrotrophic peatlands are a valuable repository of high-quality
climatic signals because their only source of water is precipitation.
For this reason, they constitute an authentic and detailed archive of
information about past and present patterns in climate change and allow
us to infer the impact of natural and human activities causing trace
elem...
A new record of Iron (Fe) fluxes are presented from a coastal Antarctic
site, Talos Dome. The Talos Dome ice core was drilled from 2005-2007, to
a depth of 1620 m, covering more than 250 ky of climate variability.
Iron fluxes at Talos Dome were consistently greater than at Dome C,
particularly during interglacials when Talos Dome receives dust defl...
Iodine and bromine species participate in key atmospheric reactions including the formation of cloud condensation nuclei and ozone depletion. We present a novel method coupling a high-performance liquid chromatography with ion chromatography and inductively coupled plasma mass spectrometry, which allows the determination of iodine (I) and bromine (...
In this case–control pilot study a recent method based on HPLC hyphenated to ICP-MS was employed for the quantification of serum glutathione peroxidase type 3 (GPx3), seleno-protein P (SelP) and seleno-albumin (SeAlb) in 42 patients with colorectal cancer (CRC) and 20 controls. Patients with early cancer stage (TNM I) showed a significantly higher...
Iron is an element of great interest due to its role in primary production and in oceanic carbon cycle regulation, such that past changes in iron deposition may have influenced oceanic sequestration of atmospheric CO2 on millennial time scales. The behavior of iron in biological and environmental contexts depends strongly on its oxidation state. So...
We present a Rare Earth Elements (REE) record determined on the EPICA ice core drilled at Dronning Maud Land (EDML) in the Atlantic sector of the East Antarctic Plateau. The record covers the transition from the last glacial stage (LGS) to the early Holocene (26 600–7500 yr BP) at decadal to centennial resolution. Additionally, samples from potenti...
We present a Rare Earth Elements (REE) record at decadal resolution determined in the EPICA ice core drilled in Dronning Maud Land (EDML) in the Atlantic Sector of the East Antarctic Plateau, covering the transition from the last glacial age (LGA) to the early Holocene (26,600-7,500 yr BP). Additionally, samples from potential source areas (PSAs) f...
a b s t r a c t Plutonium is present in the environment as a consequence of atmospheric nuclear tests, nuclear weapons production and industrial releases over the past 50 years. To study temporal trends, a high resolution Pu record was obtained by analyzing 52 discrete samples of an alpine firn/ice core from Colle Gnifetti (Monte Rosa, 4450 m a.s.l...
In June 2009, we conducted the first extensive glaciological survey of Alto dell'Ortles, the uppermost glacier of Mt. Ortles (3905 m a.s.l.), the highest summit of the Eastern European Alps. This section of the Alps is located in a rain shadow and is characterized by the lowest precipitation rate in the entire Alpine arc. Mt. Ortles offers a unique...
Inductively coupled plasma-mass spectrometry coupled with cation exchange matrix separation has been optimised for the direct determination of platinum group element (PGE) and trace element emissions from a diesel engine car. After matrix separation method detection limits of 1.6 ng g(-1) for Pd, 0.4 ng g(-1) for Rh and 4.3 ng g(-1) for Pt were ach...
Heavy metals and trace elements are ubiquitous throughout the environment, some are essential for life (e.g., Fe), others are micronutrients (e.g., Se) and others are considered as toxic elements (e.g., Hg). Levels of these elements in the environment are determined by the local geochemistry and anthropogenic emissions, with implications for human...
We present a Rare Earth Elements (REE) record at decadal resolution determined in the EPICA ice core drilled in Dronning Maud Land (EDML) in the Atlantic Sector of the East Antarctic Plateau, covering the transition from the last glacial age (LGA) to the early Holocene (26 600–7500 yr BP). Additionally, samples from potential source areas (PSAs) fo...
In June 2009, we conducted the first extensive glaciological survey of Alto dell'Ortles, the uppermost glacier of Mt. Ortles which at 3905 meters above sea level (m a.s.l.) is the highest summit of the Eastern European Alps. We analyzed snow samples collected from a 4.5 m snow-pit at 3830 m a.s.l. Here, we present a comprehensive data set including...
Pb and Ba concentrations and Pb isotopic compositions are reported for firn core and snow pit samples from Victoria Land, Antarctica, dating from 1872 AD to 1994 AD. From variations in Pb/Ba ratios and Pb isotopic compositions, two periods of major Pb enhancements were identified, from 1891 to 1908 AD and from 1948 to 1994 AD. The earlier pollution...
To date there is a lack of knowledge of the composition of the past African atmosphere, especially at high elevations. As aerosols play an important role in the climate system, the assessment of their chemical and physical characteristics is critical to better understand the past climate dynamics of this continent. The Kilimanjaro ice fields (5893...
The association between the concentration/activity of selenium/selenoproteins in plasma and type 2 diabetes mellitus is still a matter of debate. This cross-sectional pilot study evaluates whether patients with diabetes present a different plasma selenoproteins status than a healthy control group and examines whether the introduction of clinical pa...
This paper deals primarily with the validation of a clean-up procedure based on anion exchange solid-phase extraction for the accurate determination of glutathione peroxidase (GPx), selenoproteinP (SelP) and selenoalbumin (SeAlb) in human serum by affinity HPLC (AF-HPLC) coupled to inductively coupled plasma-mass spectrometry (ICP-MS). In addition,...
The occurrence of organic pollutants in European Alpine snow/ice has been reconstructed over the past three centuries using a new online extraction method for polycyclic aromatic hydrocarbons (PAH) followed by liquid chromatographic determination. The meltwater flow from a continuous ice core melting system was split into two aliquots, with one ali...
Impurities trapped in snow and ice provide precious information on the past-atmosphere and past environmental variations. In particular, the study of trace elements and ionic compounds contributes to the understanding the changes in the past atmospheric circulation and the estimation of the relative contribution of different sources. Until now, rel...
In recent years identification of the geographical origin of food has grown more important as consumers have become interested in knowing the provenance of the food that they purchase and eat. Certification schemes and labels have thus been developed to protect consumers and genuine producers from the improper use of popular brand names or renowned...
This paper reports the first rare earth element (REE) concentrations in accreted ice refrozen from sub-glacial Lake Vostok (East Antarctica). REE were determined in various sections of the Vostok ice core in order to geochemically characterize its impurities. Samples were obtained from accreted ice and, for comparison, from the upper glacier ice of...
Microbore affinity-HPLC (AF-HPLC) hyphenated to inductively coupled plasma-sector field mass spectrometry (ICP-SFMS) was applied
to the simultaneous speciation analysis of glutathione peroxidase (GPx), selenoprotein P (SelP) and seleno-albumin (SeAlb)
in 5 μL of (human) serum. ICP-SFMS (high resolution mode, HR, M/ΔM = 10,000) was used for the quan...
Plutonium is present in the environment as a consequence of atmospheric nuclear tests carried out in the 1960s, nuclear weapons production and releases by the nuclear industry over the past 50 years. Plutonium, unlike uranium, is essentially anthropogenic and it was first produced and isolated in 1940 by deuteron bombardment of uranium in the cyclo...
A new melting device for on-line decontamination and continuous analysis
of firn/ice cores was used to analyse an alpine firn/ice core drilled at
Colle Gnifetti (M. Rosa, 4450 m a.s.l.), covering a time period of
10,000 years. Melt water from inner part of ice core section was pumped
to an ICP-QMS and a conductivity micro-cell for trace elements an...
Ir and Pt are siderophile elements that are considered proxies of meteoric material of cosmic origin entrapped within polar ice layers. However, volcanic and anthropogenic fallouts have the potential to perturb their characteristic extraterrestrial signature even in remote polar areas. Here we show a record of Ir and Pt concentrations in snow sampl...
Knowledge of the occurrence of trace elements deposited in fresh alpine snow is very limited. Although current sources of major ionic inorganic species have been well established, this is not the case for many trace elements. This manuscript attempts to reconstruct the origin of Ag, Ba, Bi, Cd, Co, Cr, Cu, Fe, Mo, Mn, Pb, Sb, Ti, U, V and Zn in win...
Cu, Zn, As, Cd, Pb and Bi were determined by Inductively Coupled Plasma Sector Field Mass Spectrometry (ICP-SFMS) in seventy-seven sections of the 3270 m deep ice core drilled at Dome C at an altitude of 3233 m on the East Antarctic plateau as part of the European Program for Ice Coring in Antarctica (EPICA). The depth of the section ranged from 23...
A method based on anion exchange (AE) and affinity (AF)-HPLC (AE-AF-HPLC) hyphenated to inductively coupled plasma-(quadrupole) mass spectrometry (ICP-QMS) was developed for the speciation analysis of selenoprotein P (SelP), glutathione peroxidase (GPx) and selenoalbumin (SeAlb) in human serum. AE-HPLC is proposed here for the on-line alleviation o...
Anion exchange-solid-phase extraction carried out prior to double column affinity-high performance liquid chromatography (AF-HPLC) coupled on-line with conventional inductively coupled plasma-(quadrupole) mass spectrometry is proposed for simultaneous speciation analysis of selenoprotein P (SelP), glutathione peroxidase (GPx) and selenoalbumin (SeA...
Cr, Fe, Rb, Ba and U were determined by inductively coupled plasma sector field mass spectrometry (ICP-SFMS) in various sections
of the 3,270m deep ice core recently drilled at Dome C on the high East Antarctic plateau as part of the EPICA program. The
sections were dated from 263kyr bp (depth of 2,368m) to 672kyr bp (depth of 3,062m). When combine...
Atmospheric pollution by heavy metals is an important problem in Europe. Considerable efforts have been made to assess the problem, especially through extensive monitoring programs and emission inventories. A major difficulty with such approaches is that they provide information only for recent decades and do not allow us to go back in time to the...
The use of commercially available cation exchange cartridges for the on/off-line removal of the major interferences of platinum
group elements (PGEs) during analysis by inductively coupled plasma mass spectrometry (ICP-MS) was investigated and the method
was validated using standard solutions and a certified reference material (BCR-723), road dust....
Meteoric smoke particles (MSPs) form through the vaporization of meteoroids and the subsequent re-condensation of metallic species in the mesosphere. Recently, iridium and platinum enrichments have been identified in Greenland ice layers and attributed to the fallout of MSPs supplying polar latitudes with cosmic matter during the Holocene. However,...
Trace elements concentrations were determined in shallow snow samples from 21 sites in the Italian Eastern Alps in order to identify the sources of the contaminants present in the tropospheric winter boundary layer. The collection of superficial snow layers was carried out weekly at altitudes between 1000 and 3000 m next to meteorological stations,...
A method, based on inductively coupled plasma sector field mass spectrometry coupled with a microflow nebulizer and a desolvation system, has been developed for the direct determination of rare earth elements (REE) (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) down to the subpicogram per gram level (1 pg/g = 10(-12) g g(-1)) in approxima...
A decrease in the micronutrient iron supply to the Southern Ocean is widely believed to be involved in the atmospheric CO2 increase during the last deglaciation. Here we report the first record of atmospheric iron fluxes as determined in 166 samples of the Dome C ice core and covering the last glacial-interglacial transition (22–9 kyr B.P.). It rev...
Concentrations of Li, Mg, Cr, Mn, Co, Cu, As, Rb, Cd, Ba and Bi have been determined by inductively coupled plasma sector field mass spectrometry (ICP-SFMS) in various sections of the new Dome C EPICA Antarctic ice core, down to the depth of 2193 m, covering a time period of two climatic cycles. The time resolution of these records is at least twic...
Pb and Ba concentrations and Pb isotopic compositions are reported for firn core and snow pit samples from Victoria Land, Antarctica, dating from 1872 AD to 1994 AD. From variations in Pb/Ba ratios and Pb isotopic compositions, two periods of major Pb enhancements were identified, from 1891 to 1908 AD and from 1948 to 1994 AD. The earlier pollution...
An iridium anomaly at the Cretaceous/Tertiary boundary layer has been attributed to an extraterrestrial body that struck the Earth some 65 million years ago. It has been suggested that, during this event, the carrier of iridium was probably a micrometre-sized silicate-enclosed aggregate or the nanophase material of the vaporized impactor. But the f...
Direct and simultaneous determination of Al, Ag, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Pb, Sb, U, V and Zn in diluted (1:10 v:v) seawater from the Antarctic Ocean and the Venice Lagoon at the ng mL(-1) and pg mL(-1) level has been performed by using an inductively coupled plasma sector field mass spectrometer (ICP-SFMS). Samples were analysed by using a...
Cr, Cu, Zn, Co, Ni, Mo, Rh, Pd, Ag, Cd, Sb, Pt, Au, and U have been determined in clean room conditions by inductively coupled plasma sector field mass spectrometry and other analytical techniques, in various sections of two dated snow/ice cores from the high-altitude (4450 m asl) glacier saddle Colle Gnifetti, Monte Rosa massif, located in the Swi...
