Forest thinning experiment confirms ozone deposition to forest canopy is dominated by reaction with biogenic VOCs

Geophysical Research Letters - Tập 31 Số 22 - 2004
A. H. Goldstein1, M. McKay1, M. R. Kurpius1, Gunnar W. Schade1,2, A. Lee1, Rupert Holzinger1, R. A. Rasmussen3
1Department of Environmental Science, Policy, and Management (ESPM), University of California, Berkeley, California, USA
2Now at Institute for Environmental Physics, University of Bremen, Bremen, Germany.
3Department of Environmental and Biomolecular Systems, Oregon Graduate Institute, Beaverton, Oregon, USA

Tóm tắt

Ecosystem ozone uptake can occur through stomatal and surface deposition and through gas phase chemical reactions. In a California pine forest, thinning dramatically enhanced both monoterpene emission and ozone uptake. These simultaneous enhancements provide strong evidence that ozone reactions with unmeasured biogenically emitted volatile organic compounds (BVOCs) dominate ozone uptake, and these unmeasured BVOC emissions are approximately 10 times the measured monoterpene flux. Branch enclosure measurements confirm more than 100 BVOCs are emitted but not typically observed above the forest. These BVOCs likely impact tropospheric composition as a previously unquantified source of secondary oxygenated VOCs, organic aerosols, and OH radicals.

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Tài liệu tham khảo

10.1029/2000JD900168

10.1016/S1352-2310(98)00277-5

10.1029/1998JD100026

10.1016/j.atmosenv.2003.10.063

10.1126/science.1094392

10.1029/2000JD900691

10.1023/A:1012243317471

10.1016/S0168-1923(99)00168-9

10.1029/94JD02950

10.5194/acpd-4-5345-2004

10.1029/2002GL016785

10.1029/1999JD900289

10.1016/S0269-7491(00)00045-2

10.1016/j.atmosenv.2003.12.036

10.1038/416497a

10.1104/pp.121.2.325

10.1021/jp991995e

10.1029/2000JD900592

10.1029/2002GL016138

10.1029/1999GL900444

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Geophysical Research Letters

Tập 31 Số 22

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