DOI: 10.5194/hess-24-673-2020
论文题名: Freshwater pearl mussels from northern Sweden serve as long-term; high-resolution stream water isotope recorders
作者: Schöne B.R. ; Meret A.E. ; Baier S.M. ; Fiebig J. ; Esper J. ; Mcdonnell J. ; Pfister L.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 2 起始页码: 673
结束页码: 696
语种: 英语
英文摘要: The stable isotope composition of lacustrine sediments is routinely used to infer Late Holocene changes in precipitation over Scandinavia and, ultimately, atmospheric circulation dynamics in the North Atlantic realm. However, such archives only provide a low temporal resolution (ca. 15 years), precluding the ability to identify changes on inter-annual and quasi-decadal timescales. Here, we present a new, high-resolution reconstruction using shells of freshwater pearl mussels, iMargaritifera margaritifera/i, from three streams in northern Sweden. We present seasonally to annually resolved, calendar-aligned stable oxygen and carbon isotope data from 10 specimens, covering the time interval from 1819 to 1998. The bivalves studied formed their shells near equilibrium with the oxygen isotope signature of ambient water and, thus, reflect hydrological processes in the catchment as well as changes, albeit damped, in the isotope signature of local atmospheric precipitation. The shell oxygen isotopes were significantly correlated with the North Atlantic Oscillation index (up to 56&% explained variability), suggesting that the moisture that winter precipitation formed from originated predominantly in the North Atlantic during span classCombining double low line"inline-formula"NAO+/span years but in the Arctic during span classCombining double low line"inline-formula"NAO-/span years. The isotope signature of winter precipitation was attenuated in the stream water, and this damping effect was eventually recorded by the shells. Shell stable carbon isotope values did not show consistent ontogenetic trends, but rather oscillated around an average that ranged from ca. span classCombining double low line"inline-formula"-12.00/span to span classCombining double low line"inline-formula"-13.00/span&‰ among the streams studied. Results of this study contribute to an improved understanding of climate dynamics in Scandinavia and the North Atlantic sector and can help to constrain eco-hydrological changes in riverine ecosystems. Moreover, long isotope records of precipitation and streamflow are pivotal to improve our understanding and modeling of hydrological, ecological, biogeochemical and atmospheric processes. Our new approach offers a much higher temporal resolution and superior dating control than data from existing archives. © 2020 BMJ Publishing Group. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162792
Appears in Collections: 气候变化与战略
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作者单位: Schöne, B.R., Institute of Geosciences, University of Mainz, Mainz, 55128, Germany; Meret, A.E., Naturhistoriska riksmuseet, Stockholm, 114 18, Sweden; Baier, S.M., Agilent Technologies Sales and Services GmbH and Co. KG, Frankfurt am Main, 60528, Germany; Fiebig, J., Institute of Geosciences, J. W. Goethe University, Frankfurt am Main, 60438, Germany; Esper, J., Department of Geography, University of Mainz, Mainz, 55128, Germany; Mcdonnell, J., Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK S7N 3H5, Canada; Pfister, L., University of Luxembourg, Faculty of Science, Technology and Medicine, 2 Avenue de l'Université, Esch-sur-Alzette, 4365, Luxembourg
Recommended Citation:
Schöne B.R.,Meret A.E.,Baier S.M.,et al. Freshwater pearl mussels from northern Sweden serve as long-term; high-resolution stream water isotope recorders[J]. Hydrology and Earth System Sciences,2020-01-01,24(2)