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Differences in oxygen‐18 content of throughfall and rainfall in hardwood and coniferous forests
Author(s) -
Dewalle David R.,
Swistock Bryan R.
Publication year - 1994
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.3360080106
Subject(s) - throughfall , deciduous , environmental science , spring (device) , hardwood , storm , hydrology (agriculture) , ecology , soil water , geography , geology , soil science , biology , meteorology , mechanical engineering , geotechnical engineering , engineering
The differences between δ 18 O in throughfall and open rainfall were studied for 16 selected spring and summer storms in deciduous, pine and spruce forests in central Pennsylvania, USA. Throughfall δ 18 O averaged 0.17, 0.32 and 0.24% o greater than δ 18 O of open rainfall for all storms at the deciduous, pine and spruce sites, respectively. Throughfall 18 O enrichment was greater in low intensity spring rainfall events than higher intensity growing season storms and greater in the coniferous stands than the deciduous hardwood stand. Maximum throughfall 18 O enrichment of l.61% o occurred in the spruce forest during one spring event. The differences between rainfall and throughfall 18 O observed in this study for individual storm events may have important implications for isotope flow separation studies.