Publication Date:
2016-11-24
Description:
An active debate has been underway on the magnitude and duration of carbon (C) emissions from hydroelectric reservoirs, yet little attention has been paid to stochastic C emissions from reservoir sediments during extreme climatic events. A rare opportunity for field measurements of CO 2 efflux from a hydroelectric reservoir in Korea during an extreme drought event was used to examine how prolonged droughts can affect microbial organic matter processing and the release of CO 2 , CH 4 and N 2 O from exposed sediments. Chamber measurements of CO 2 efflux along an exposed sediment transect, combined with high-frequency continuous sensor measurements of the partial pressure of CO 2 (pCO 2 ) in the reservoir surface water, exhibited extraordinary pulses of CO 2 from exposed sediments and the turbulent inflowing water in contrast to a small CO 2 sink in the main water body of the reservoir and a low ...
Print ISSN:
1748-9318
Electronic ISSN:
1748-9326
Topics:
Biology
,
Energy, Environment Protection, Nuclear Power Engineering
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