http://www.cnr.it/ontology/cnr/individuo/prodotto/ID29128

Water Chemistry of lake Albano. (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Water Chemistry of lake Albano. (Articolo in rivista) (literal)

Anno

2003-01-01T00:00:00+01:00 (literal)

Alternative label

Cioni R. , Guidi M. , Raco B. , Marini L. , Gambardella B. (2003)
Water Chemistry of lake Albano.
in Journal of volcanology and geothermal research
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Cioni R. , Guidi M. , Raco B. , Marini L. , Gambardella B. (literal)

Pagina inizio

179 (literal)

Pagina fine

195 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

The waters of Albano lake, one of the largest volcano lake of Italy, are characterized by a increase with depth of CO2 and CH4 concentration. Assuming that Albano lake behaves as a closed system with respect to C species, the gas rich deep waters can be controlled trough a continuos monitoring for prevent a catastrophic gas exolution in an area densily populated. (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

120 (literal)

Rivista

Journal of volcanology and geothermal research (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

Impact Factor 1,457 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

Based on the vertical distribution of dissolved O2, temperature, and pH Lake Albano was stratified at the time of our survey, in December 1997. Vertical changes in the density of lake waters indicate that overturn may be induced by cooling of shallow waters below î8.5¢XC, which is a possible phenomenon in cold winter periods. The flat vertical profiles of Cl, Na, K, Mg, N2, and Ar suggest that physical, chemical, and biological processes have not had enough time to change the vertical distribution of these chemical components in lake waters since the last overturn. Lake Albano waters are also characterized by a remarkable increase with depth in CO2 and CH4 concentrations, of 1 and 3 orders of magnitude, respectively. Assuming that Lake Albano behaves as a closed system with respect to C species, the distribution of CO2 and CH4 in lake waters would be governed by the balance between (1) the photosynthetic production, which settles into the anoxic hypolimnion upon death of the organisms and (2) the decomposition of organic matter and the consequent generation of CO2 and CH4 occurring in lake sediments, as commonly observed in lakes. In spite of the presence of these different sources of CO2 and CH4, total gas pressure in lake waters was very close to atmospheric pressure (range 0.9 - 1.3 bar) at all depths, from the surface to 130 m depth, in December 1997. Monitoring of relevant chemical and physical parameters of Lake Albano waters should be carried out on a regular basis. (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

a)Cioni, Roberto; a) Guidi, Massimo; a)Raco, Brunella; b)Marini, Luigi; b) Gambardella, Barbara a) CNR-IGG, Via G. Moruzzi 1, I-56124, Pisa, Italy b. Dip. Te. Ris., Università di Genova, Corso Europa 26, I-16132, Genoa, Italy (literal)

Titolo

Water Chemistry of lake Albano. (literal)

Abstract

Lake Albano was stratified at the time of our survey, in December 1997, in agreement with previous observations [Martini et al., Geochem. J. 28 (1994) 173¡V184; Cioni et al., Report for the Civil Protection Department (1995); Pedreschi, Accad. Lucch. Sci. Lett. Arti (1995) 39]. In the absence of phenomena induced by seismic activity, either local or regional, lake stratification may be perturbed by cooling of shallow waters below 8.5¢XC. Circulation is expected to homogenize lake waters and eventually to trigger gas exsolution when total gas pressure exceeds hydrostatic pressure. In December 1997, total gas pressure in lake water was very close to atmospheric pressure (0.9¡V1.3 bar) at all depths, possibly due to the occurrence of a recent episode of circulation and presumed gas exsolution. The state of saturation of Lake Albano waters and the similarity of the relative concentrations of Na, K, Mg, and Ca in lake waters, local groundwaters, and local volcanic rocks indicate that Na, K, Mg, and Ca concentrations in Lake Albano waters are mainly governed by incongruent dissolution of local volcanic rocks, coupled with minor calcite precipitation at shallow depths. (literal)

Prodotto di