Počet záznamů: 1
Twenty-year inter-annual trends and seasonal variations in precipitation and stream water chemistry at the Bear Brook Watershed in Maine, USA
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SYSNO ASEP 0348967 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Twenty-year inter-annual trends and seasonal variations in precipitation and stream water chemistry at the Bear Brook Watershed in Maine, USA Tvůrce(i) Navrátil, Tomáš (GLU-S) RID, SAI, ORCID
Norton, S. A. (US)
Fernandez, I. J. (US)
Nelson, S. J. (US)Zdroj.dok. Environmental Monitoring and Assessment. - : Springer - ISSN 0167-6369
Roč. 171, 1/4 (2010), s. 23-45Poč.str. 23 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Bear Brook Watershed in Maine ; precipitation chemistry ; stream chemistry ; seasonality ; long-term trends Vědní obor RIV DD - Geochemie CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000283592800003 EID SCOPUS 78149409692 DOI 10.1007/s10661-010-1527-z Anotace Mean annual concentrations of SO42- and NO3- in wet-only deposition have decreased between 1988 and 2006 at BBWM due to decreased emissions of SO2 and NOx. Base cations, NH4+ and Cl- concentrations mostly exhibited no trends or statistically significant trends but with change of < 1 ueq L-1 per year from 1988 to 2006. Seasonally, two chemically distinct periods of precipitation (April to September) and (October to March) indicate two different trajectories of air mass movement: dominantly continental sources in the warm season with increased SO42- and NH4+ and mixed continental and marine sources in the cool season with increased inputs of marine aerosols. The major factors driving seasonality of the streams are hydrology, vegetation activity, and temperature. The low flow periods June - October were typical with greater contribution of the deeper flow solutions and increased pH value, anion neutralizing capacity, Si concentration, non-marine Na and low Ali concentrations. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2011
Počet záznamů: 1