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Titolo:
DETERMINING PAST ATMOSPHERIC HCL MIXING RATIOS FROM ICE CORE ANALYSES
Autore:
DOMINE F; THIBERT E; SILVENTE E; LEGRAND M; JAFFREZO JL;
Indirizzi:
LAB GLACIOL & GEOPHYS ENVIRONM,CNRS,BP 96,54 RUE MOLIERE F-38402 ST MARTIN DHERES FRANCE
Titolo Testata:
Journal of atmospheric chemistry
fascicolo: 2, volume: 21, anno: 1995,
pagine: 165 - 186
SICI:
0167-7764(1995)21:2<165:DPAHMR>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITRIC-ACID; ANTARCTIC SNOW; GREENLAND; RECORD; VAPOR; TEMPERATURES; COEFFICIENTS; STRATOSPHERE; SURFACES; DROPLETS;
Keywords:
HCL; AIR-SNOW TRANSFER FUNCTION; SOLUBILITY; ICE; GAS PHASE MEASUREMENTS; SNOW ANALYSIS; GREENLAND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
53
Recensione:
Indirizzi per estratti:
Citazione:
F. Domine et al., "DETERMINING PAST ATMOSPHERIC HCL MIXING RATIOS FROM ICE CORE ANALYSES", Journal of atmospheric chemistry, 21(2), 1995, pp. 165-186

Abstract

Laboratory and field measurements have been performed in order to improve our understanding of the HCl air-snow transfer function. The solubility and diffusion of HCl in laboratory grown single crystals of icehave been measured as a function of HCl partial pressure, P-HCl, between -8 and -25 degrees C. Measurements of P-HCl and of the mole fraction of (HCl) in snow, X(HCl)', have been measured at Summit, Greenland. Comparison of the held and laboratory measurements show that the X(HCl)' values are well below equilibrium values. The major processes involved in the formation of snow crystals and in their evolution after deposition are discussed in order to attempt to understand the X(HCl)' values and their variations. The discussion is focussed on a few well identified snow layers. It is concluded that sublimation and recrystallization of snow probably play a major role in the evolution of X(HCl)', but that our understanding of the HCl transfer function is very incomplete. Laboratory and held measurements are suggested to improve thissituation.

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Documento generato il 07/04/20 alle ore 21:49:17