Influence of transport and trends in atmospheric CO2 at Lampedusa

Artuso, Florinda; Chamard, P.; Piacentino, Salvatore; Sferlazzo, Damiano; Silvestri, Lorenzo De; Sarra, Alcide di; Meloni, Daniela; Monteleone, Francesco

doi:10.1016/j.atmosenv.2009.03.027

Cited by 90 publications

(72 citation statements)

References 27 publications

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“…Artuso et al, 2009;Becagli et al, 2012;Gómez-Amo et al, 2013). The results show that the PM 10 concentrations are influenced by marine and ship emissions to which Saharan dust events in spring are added (Becagli et al, 2012;Mallet et al, 2016).…”

Section: Sampling Of Insoluble Deposition and Total Mass Measurementsmentioning

confidence: 70%

Estimating chemical composition of atmospheric deposition fluxes from mineral insoluble particles deposition collected in the western Mediterranean region

Desboeufs

Vincent

et al. 2017

Atmos. Meas. Tech.

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Abstract. In order to measure the mass flux of atmospheric insoluble deposition and to constrain regional models of dust simulation, a network of automatic deposition collectors (CARAGA) has been installed throughout the western Mediterranean Basin. Weekly samples of the insoluble fraction of total atmospheric deposition were collected concurrently on filters at five sites including four on western Mediterranean islands (Frioul and Corsica, France; Mallorca, Spain; and Lampedusa, Italy) and one in the southern French Alps (Le Casset), and a weighing and ignition protocol was applied in order to quantify their mineral fraction. Atmospheric deposition is both a strong source of nutrients and metals for marine ecosystems in this area. However, there are few data on trace-metal deposition in the literature, since their deposition measurement is difficult to perform. In order to obtain more information from CARAGA atmospheric deposition samples, this study aimed to test their relevance in estimating elemental fluxes in addition to total mass fluxes. The elemental chemical analysis of ashed CARAGA filter samples was based on an acid digestion and an elemental analysis by inductively coupled plasma atomic emission spectroscopy (ICP-AES) and mass spectrometry (MS) in a clean room. The sampling and analytical protocols were tested to determine the elemental composition for mineral dust tracers (Al, Ca, K, Mg and Ti), nutrients (P and Fe) and trace metals (Cd, Co, Cr, Cu, Mn, Ni, V and Zn) from simulated wet deposition of dust analogues and traffic soot. The relative mass loss by dissolution in wet deposition was lower than 1 % for Al and Fe, and reached 13 % for P due to its larger solubility in water. For trace metals, this loss represented less than 3 % of the total mass concentration, except for Zn, Cu and Mn for which it could reach 10

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Section: Sampling Of Insoluble Deposition and Total Mass Measurementsmentioning

confidence: 70%

Estimating chemical composition of atmospheric deposition fluxes from mineral insoluble particles deposition collected in the western Mediterranean region

Desboeufs

Vincent

et al. 2017

Atmos. Meas. Tech.

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“…It was noting that the increase in seasonal amplitude CO 2 may be closely related the sink of CO 2 in northern extratropical land ecosystems (Pan et al, 2011). The relationship depends on how the sink has changed over time, which are very likely linked to the El NinoSourthern Oscillation (ENSO) (Artuso et al, 2009;Fang et al, 2014). Strong ENSO could be led to higher winter temperatures and an advanced spring season.…”

Section: Evolution and Variation Of Co 2 Concentrations At Individualmentioning

confidence: 99%

Evolution and variation of atmospheric carbon dioxide concentration over terrestrial ecosystems as derived from eddy covariance measurements

Liu

Zhu

et al. 2015

Atmospheric Environment

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h i g h l i g h t sAtmospheric CO 2 concentration over terrestrial ecosystems (ACTE) was analyzed. ACTE was higher by 9.0 ppm in winter and lower 2.1 ppm in summer than global means. Annual mean and seasonal amplitude of ACTE increased with 2.04 and 0.60 ppm yr À1 . The annual CO 2 concentration showed large variation among ecosystems. a r t i c l e i n f o (CO 2 ) is the most important anthropogenic greenhouse gas contributing to global climate change. Understanding the temporal and spatial variations of CO 2 concentration over terrestrial ecosystems provides additional insight into global atmospheric variability of CO 2 concentration. Using 355 site-years of CO 2 concentration observations at 104 eddy-covariance flux tower sites in Northern Hemisphere, we presented a comprehensive analysis of evolution and variation of atmospheric CO 2 concentration over terrestrial ecosystem (ACTE) for the period of 1997e2006. Our results showed that ACTE exhibited a strong seasonal variations, with an average seaonsal amplitude (peak-trough difference) of 14.8 ppm, which was approximately threefold that global mean CO 2 observed in Mauna Loa in the United States (MLO). The seasonal variation of CO 2 were mostly dominant by terrestrial carbon fluxes, i.e., net ecosystem procution (NEP) and gross primary produciton (GPP), with correlation coefficient(r) were À0.55 and À0.60 for NEP and GPP, respectively. However, the influence of carbon fluxes on CO 2 were not significant at interannual scale, which implyed that the inter-annual changing trends of atmospheric CO 2 in Northern Hemisphere were likely to depend more on anthropogenic CO 2 emissions sources than on ecosystem change. It was estimated, by fitting a harmonic model to monthly-mean ACTE, that both annual mean and seasonal amplitude of ACTE increased over the 10-year period at rates of 2.04 and 0.60 ppm yr À1 , respectively. The uptrend of annual ACTE could be attributed to the dramatic global increase of CO 2 emissions during the study period, whereas the increasing amplitude could be related to the increases in Northern Hemisphere biospheric activity. This study also found that the annual CO 2 concentration showed large variation among ecosystems, with the high value appeared in deciduous broadleaf forest, evergreen broadleaf forest and cropland. We attribute these discrepancies to both differential local anthropogenic impacts and carbon sequestration abilities across ecosystem types.

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“…The Dardanelles inputs are considered in the same way but based on earlier information (Somot et al, 2008;CopinMontégut, 1993). Atmospheric CO 2 is set according to the trend shown at the Lampedusa station (Artuso et al, 2009). To smooth artificial effects of discontinuous initial conditions, before starting the actual biogeochemical simulation a spin-up period (5 years) was run by using atmospheric forcing typical of the period.…”

Section: Model Setupmentioning

confidence: 99%

Spatiotemporal variability of alkalinity in the Mediterranean Sea

2015

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Abstract. The paper provides a basin-scale assessment of the spatiotemporal distribution of alkalinity in the Mediterranean Sea. The assessment is made by integrating the available observations into a 3-D transport-biogeochemical model.The results indicate the presence of complex spatial patterns: a marked west-to-east surface gradient of alkalinity is coupled to secondary negative gradients: (1) from marginal seas (Adriatic and Aegean Sea) to the eastern Mediterranean Sea and (2) from north to south in the western region. The west-east gradient is related to the mixing of Atlantic water entering from the Strait of Gibraltar with the high-alkaline water of the eastern sub-basins, which is correlated to the positive surface flux of evaporation minus precipitation. The north-to-south gradients are related to the terrestrial input and to the input of the Black Sea water through the Dardanelles. In the surface layers, alkalinity has a relevant seasonal cycle (up to 40 µmol kg −1 ) that is driven by physical processes (seasonal cycle of evaporation and vertical mixing) and, to a minor extent, by biological processes. A comparison of alkalinity vs. salinity indicates that different regions present different relationships: in regions of freshwater influence, the two quantities are negatively correlated due to riverine alkalinity input, whereas they are positively correlated in open sea areas of the Mediterranean Sea.

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Influence of transport and trends in atmospheric CO2 at Lampedusa

Cited by 90 publications

References 27 publications

Estimating chemical composition of atmospheric deposition fluxes from mineral insoluble particles deposition collected in the western Mediterranean region

Estimating chemical composition of atmospheric deposition fluxes from mineral insoluble particles deposition collected in the western Mediterranean region

Evolution and variation of atmospheric carbon dioxide concentration over terrestrial ecosystems as derived from eddy covariance measurements

Spatiotemporal variability of alkalinity in the Mediterranean Sea

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