Title: Use of stable isotope ratios for evaluating sulfur sources and losses at the Hubbard Brook Experimental Forest
Author: Mitchell, M.J.; Mayer, B.; Bailey, S.W.; Hornbeck, J.W.; Alewell, C.; Driscoll, C.T.; Likens, G.E.;
Source: Water, Air, and Soil Pollution. 130: 75-86.
Publication Series: Scientific Journal (JRNL)
Description: Anthropogenic S emissions have been declining in eastern North America since the early 1970s. Declines in atmospheric S deposition have resulted in decreases in concentrations and fluxes of SO42-) in precipitation and drainage waters. Recent S mass balance studies have shown that the outflow of SO42-) in drainage waters greatly exceeds current S inputs from atmospheric deposition. Identifying the S source(s) which contribute(s) to the discrepancy in watershed S budgets is a major concern to scientists and policy makers because of the need to better understand the rate and spatial extent of recovery from acidic deposition. Results from S mass balances combined with model calculations and isotopic analyses of SO42-) in precipitation and drainage waters at the Hubbard Brook Experimental Forest (HBEF) suggest that this discrepancy cannot be explained by either underestimates of dry deposited s or desorption of previously stored SO42-). Isotopic results suggest that the excess S may be at least partially derived from net mineralization of organic S as well as the weathering of S-bearing minerals.
Keywords: atmospheric deposition, organic S, S budgets, stable isotopes, watersheds, weathering
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
XML: View XML
Mitchell, M.J.; Mayer, B.; Bailey, S.W.; Hornbeck, J.W.; Alewell, C.; Driscoll, C.T.; Likens, G.E. 2001. Use of stable isotope ratios for evaluating sulfur sources and losses at the Hubbard Brook Experimental Forest. Water, Air, and Soil Pollution. 130: 75-86.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility