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- Title
Stable water isotope climate archives in springs from the Olympic Mountains, Washington.
- Authors
Sidle, W.; Cvetic, V.
- Abstract
The O and H (HDO) compositions are summarized for sampled springs ( n = 81) within the Elwha watershed (≈692 km) on the northern Olympic Peninsula. Samples, collected during 2001-2009, of springs ( n = 158), precipitation ( n = 520), streams ( n = 176), and firn ( n = 3) assisted the determinations for meteoric composition of recharge waters. The local mean water line (LMWL) is defined as δH = 8.2δO − 9.3 for the watershed. Recharge history is surmised from groundwater ages ranging from 5 ± 3 years (apparent Kr) to 9,490 ± 420 C cal years BP. About 56% of the springs were recharged over the last 1,000 years while 13% of springs were recharged over 5,000 years ago. Spring HDO values fluctuate between −11.8 to −15.6‰ δO and −90.9 to −119.4‰ δH. Deuterium excess values predominate around 4-6‰. The HDO proxy records from springs suggest a pronounced paleoclimate shift in air masses near 5,000 year BP on the Peninsula.
- Subjects
OLYMPIC Mountains (Wash.); WASHINGTON (State); ISOTOPES; WATERSHEDS; STABLE isotopes; CLIMATE change; DEUTERIUM; PALEOCLIMATOLOGY
- Publication
Environmental Earth Sciences, 2011, Vol 62, Issue 3, p569
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-010-0548-9