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Titolo:
Major-ion chemistry of the Rocky Mountain snowpack, USA
Autore:
Turk, JT; Taylor, HE; Ingersoll, GP; Tonnessen, KA; Clow, DW; Mast, MA; Campbell, DH; Melack, JM;
Indirizzi:
US Geol Survey, Denver Fed Ctr, Div Water Resources, Denver, CO 80225 USA US Geol Survey Denver CO USA 80225 Water Resources, Denver, CO 80225 USA US Geol Survey, Div Water Resources, Boulder, CO 80003 USA US Geol SurveyBoulder CO USA 80003 ater Resources, Boulder, CO 80003 USA Univ Montana, Natl Pk Serv, Missoula, MT 59812 USA Univ Montana Missoula MT USA 59812 , Natl Pk Serv, Missoula, MT 59812 USA Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 Barbara, CA 93106 USA
Titolo Testata:
ATMOSPHERIC ENVIRONMENT
fascicolo: 23, volume: 35, anno: 2001,
pagine: 3957 - 3966
SICI:
1352-2310(200108)35:23<3957:MCOTRM>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
COLORADO;
Keywords:
snowpack chemistry; national atmospheric deposition program; Rocky Mountains; acid deposition; sulfate; nitrate; calcium; wyoming; Colorado; Montana; New Mexico;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Ingersoll, GP US Geol Survey, Denver Fed Ctr, Div Water Resources, MS 415,Denver, CO 80225 USA US Geol Survey MS 415 Denver CO USA 80225 nver, CO 80225 USA
Citazione:
J.T. Turk et al., "Major-ion chemistry of the Rocky Mountain snowpack, USA", ATMOS ENVIR, 35(23), 2001, pp. 3957-3966

Abstract

During 1993-97, samples of the full depth of the Rocky Mountain snowpack were collected at 52 sites from northern New Mexico to Montana and analyzed for major-ion concentrations. Concentrations of acidity, sulfate, nitrate, and calcium increased from north to south along the mountain range. In the northern part of the study area, acidity was most correlated (negatively) with calcium. Acidity was strongly correlated (positively) with nitrate and sulfate in the southern part and for the entire network. Acidity in the south exceeded the maximum acidity measured in snowpack of the Sierra Nevada and Cascade Mountains. Principal component analysis indicates three solute associations we characterize as: (1) acid (acidity, sulfate, and nitrate), (2) soil (calcium, magnesium, and potassium), and (3) salt (sodium, chloride, and ammonium). Concentrations of acid solutes in the snowpack are similarto concentrations in nearby wetfall collectors, whereas, concentrations ofsoil solutes are much higher in the snowpack than in wetfall. Thus, dryfall of acid solutes during the snow season is negligible, as is gypsum from soils. Snowpack sampling offers a cost-effective complement to sampling of wetfall in areas where wetfall is difficult to sample and where the snowpackaccumulates throughout the winter. Published by Elsevier Science Ltd.

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Documento generato il 23/09/20 alle ore 00:18:21