期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 7, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50306
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资金
- NSF [EAR-0809205]
- Directorate For Geosciences
- Division Of Earth Sciences [0809205] Funding Source: National Science Foundation
- STFC [ST/J001589/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001589/1] Funding Source: researchfish
We determined the runoff exports of particulate (POC) and dissolved organic carbon (DOC) from a 12 ha forested catchment which received more than 14 storm events in a 16-month period and three extreme events associated with hurricanes. While POC and DOC exports for the small events were comparable, POC exports for the hurricane-associated events were six to eight times the DOC values. Hurricane Irene alone contributed to 56% (21.2 kg C ha(-1)) and 19% (3.3kg C ha(-1)) of the 2011 exports of POC and DOC, respectively. A precipitation threshold beyond which POC fluxes rapidly outpaced the DOC values was also identified. Our study suggests that large, high-intensity storm events that are predicted to increase under future climate-change scenarios will dramatically alter the runoff C regime by enhancing the POC inputs to aquatic ecosystems. Such shift in C forms could have important consequences for aquatic biota, atmospheric C cycling, and ecosystem and human health.
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