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首页> 外文期刊>Tellus, Series B. Chemical and Physical Meteorology >Continuous measurements of CO and H-2 deposition velocities onto an andisol: uptake control by soil moisture
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Continuous measurements of CO and H-2 deposition velocities onto an andisol: uptake control by soil moisture

机译：连续测量安第固醇上的CO和H-2沉积速度：土壤水分的吸收控制

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摘要

Carbon monoxide (CO) and hydrogen (H-2) net deposition velocities from the atmosphere onto soil and carbon dioxide (CO2) effluxes to the atmosphere have been measured in an andisol field in Tsukuba, Japan by the open-flow chamber method. The deposition velocities of CO and H-2 were closely correlated (R = 0.87), with a ratio of 1.55, which was attributed to the difference in molecular diffusivities. However, the deposition velocities did not exhibit a direct relationship with the CO2 efflux. Deposition velocities of CO and H-2 ranged from 0.00 to 0.06 cm s(-1) and from 0.00 to 0.10 cm s(-1), respectively, and were closely related to the level of the surface soil moisture (0-5 cm) and were higher in plowed plots than in compacted plots. CO deposition velocity was slightly lower in the daytime due to higher production rates affected by the soil temperature. These findings indicate that microbial CO and H-2 consumption was limited by transport resistance in the soil and that the in situ CO and H-2 uptake rates may be limited by a higher soil moisture level. CO and H-2 deposition was estimated to be restricted to the surface soil(possibly only the top 2-3 cm). CH4 and CO2 gas profiles were also related to the variation of the soil moisture level. [References: 34]
机译：在日本筑波的安迪索油田中，通过开式流室法测量了从大气到土壤的一氧化碳（CO）和氢（H-2）的净沉积速度，以及向大气中排放的二氧化碳（CO2）。 CO和H-2的沉积速度密切相关（R = 0.87），比率为1.55，这归因于分子扩散性的差异。但是，沉积速度与CO2流出没有直接关系。 CO和H-2的沉积速度分别为0.00到0.06 cm s（-1）和0.00到0.10 cm s（-1），并且与表层土壤湿度（0-5 cm）密切相关。 ）的耕地比压实地块高。白天，由于较高的生产率受土壤温度的影响，CO沉积速度略低。这些发现表明，微生物对CO和H-2的消耗受到土壤中运输阻力的限制，而原位CO和H-2的吸收速率可能受到较高土壤湿度的限制。据估计，CO和H-2沉积仅限于表层土壤（可能只有2-3 cm）。 CH4和CO2气体剖面也与土壤湿度水平的变化有关。 [参考：34]

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