Storm pulses of dissolved CO 2  in a forested headwater Amazonian stream explored using hydrograph separation | Zendy

Johnson Mark S. | Zendy; Weiler Markus | Zendy; Couto Eduardo Guimarães | Zendy; Riha Susan J. | Zendy; Lehmann Johannes | Zendy

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Storm pulses of dissolved CO 2 in a forested headwater Amazonian stream explored using hydrograph separation

Author(s) -

Johnson Mark S.,

Weiler Markus,

Couto Eduardo Guimarães,

Riha Susan J.,

Lehmann Johannes

Publication year - 2007

Publication title -

water resources research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.863

H-Index - 217

eISSN - 1944-7973

pISSN - 0043-1397

DOI - 10.1029/2007wr006359

Subject(s) - hydrograph , storm , tracer , hydrology (agriculture) , amazonian , environmental science , drainage basin , geology , amazon rainforest , oceanography , geography , ecology , physics , cartography , geotechnical engineering , nuclear physics , biology

Dissolved CO 2 dynamics in stormflow and event water versus preevent water contributions to storm hydrographs were assessed in a forested headwater catchment of the Brazilian Amazon using high‐frequency data. We applied the transfer function hydrograph separation model (TRANSEP) using specific conductance as a conservative tracer, finding preevent water to average 0.79 ± 0.03 of storm discharge (mean ± 1 SE for n = 14 storms). In situ, direct measurements of dissolved CO 2 were able to capture new hydrobiogeochemical processes in real time, including CO 2 pulses observed on the falling limb of storm hydrographs, the magnitudes of which were inversely related to preevent water fractions ( r = −0.97, p < 0.0001).

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