000174464 001__ 174464
000174464 005__ 20180913061113.0
000174464 0247_ $$2doi$$a10.1029/2011GL050247
000174464 022__ $$a0094-8276
000174464 02470 $$2ISI$$a000299699300001
000174464 037__ $$aARTICLE
000174464 245__ $$aCarbon monoxide as a tracer of gas transport in snow and other natural porous media
000174464 260__ $$bAmerican Geophysical Union$$c2012
000174464 269__ $$a2012
000174464 336__ $$aJournal Articles
000174464 520__ $$aThe movement of air in natural porous media is complex and challenging to measure. Yet gas transport has important implications, for instance, for the evolution of the seasonal snow cover and for water vapor transport in soil. A novel in situ multi-sensor measurement system providing high-resolution observation of gas transport in snow is demonstrated. Carbon monoxide was selected as the tracer gas for having essentially the same density as air, low background concentration, low water solubility, and for being detectable to ≤ 1 ppmv with small, low-cost, low-power sensors. The plume of 1% CO injections 30 cm below the snow surface was monitored using 28 sensors (4 locations, 7 depths). The CO breakthrough curves obtained at distances of 0.5–1 m were in good agreement with a simple analytical advection-diffusion model. The tracer system appears suitable for a wide range of applications in experimental soil science and hydrology addressing moisture transport and evapotranspiration processes.
000174464 6531_ $$acarbon monoxide
000174464 6531_ $$asnow
000174464 6531_ $$aporous media
000174464 6531_ $$aadvection
000174464 6531_ $$agas dispersion
000174464 700__ $$0242903$$aHuwald, Hendrik$$g168453
000174464 700__ $$aSelker, John S.
000174464 700__ $$aTyler, Scott W.
000174464 700__ $$0242907$$aCalaf, Marc$$g165914
000174464 700__ $$0243880$$aGiesen, Nick C. van de$$g201597
000174464 700__ $$0242902$$aParlange, Marc B.$$g155043
000174464 773__ $$j39$$kL02504$$tGeophysical Research Letters
000174464 8564_ $$s626863$$uhttps://infoscience.epfl.ch/record/174464/files/2011GL050247.pdf$$yPublisher's version$$zPublisher's version
000174464 8564_ $$s35646$$uhttps://infoscience.epfl.ch/record/174464/files/2011gl050247-txts01.docx$$yauxiliary material$$zauxiliary material
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000174464 917Z8 $$x168453
000174464 937__ $$aEPFL-ARTICLE-174464
000174464 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000174464 980__ $$aARTICLE