作者
SE Lindberg, H Zhang, M Gustin, A Vette, F Marsik, J Owens, A Casimir, R Ebinghaus, G Edwards, C Fitzgerald, J Kemp, HH Kock, J London, M Majewski, L Poissant, M Pilote, P Rasmussen, F Schaedlich, D Schneeberger, J Sommar, R Turner, D Wallschläger, Z Xiao
发表日期
1999/9/20
期刊
Journal of Geophysical Research: Atmospheres
卷号
104
期号
D17
页码范围
21879-21888
简介
As part of an international Hg flux intercomparison at the Steamboat Springs, Nevada, geothermal area, several dynamic soil flux chambers and micrometeorological gradient systems were operated over desert soils in early September 1997. A series of unanticipated convective rain cells impacted the site with the first rainfall in ∼90 days, and the initial 4‐cm rainfall increased soil moisture from ∼0.01 to 0.06% (vol/vol). Several chambers were operating prior to the events, and two were deployed over wet soils following rainfall. Rainfall resulted in an immediate and steep rise in ambient air Hg concentrations and soil Hg emissions which persisted for 12–24 hours. Fluxes increased most quickly and to a greater degree over the wettest soils, and the rate of increase was related to chamber design and flushing rate. The flux response was also apparent in the micrometeorological data. In general, soil emissions …
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SE Lindberg, H Zhang, M Gustin, A Vette, F Marsik… - Journal of Geophysical Research: Atmospheres, 1999