Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-14161-2018 |
Measurements of NO and NO2 exchange between the atmosphere and Quercus agrifolia | |
Delaria, Erin R.1; Vieira, Megan1; Cremieux, Julie2; Cohen, Ronald C.1,3 | |
2018-10-05 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:19页码:14161-14173 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | NO2 foliar deposition through the stomata of leaves has been identified as a significant sink of NO, within a forest canopy. In this study, we investigated NO2 and NO exchange between the atmosphere and the leaves of the native California oak tree Quercus agrifolia using a branch enclosure system. NO2 detection was performed with laser-induced fluorescence (LIF), which excludes biases from other reactive nitrogen compounds and has a low detection limit of 5-50 ppt. We performed both light and dark experiments with concentrations between 0.5 and 10 ppb NO2 and NO under constant ambient conditions. Deposition velocities for NO2 during light and dark experiments were 0.123 +/- 0.009 and 0.015 +/- 0.001 cm s(-1), respectively. Much slower deposition was seen for NO, with deposition velocities of 0.012 +/- 0.002 and 0.005 +/- 0.002 cm s(-1) measured during light and dark experiments, respectively. This corresponded to a summed resistance of the stomata and mesophyll of 6.9 +/- 0.9 s cm(-1) for NO2 and 140 +/- 40 s cm(-1) for NO. No significant compensation point was detected for NO2 uptake, but compensation points ranging from 0.74 to 3.8 ppb were observed for NO. NO2 and NO deposition velocities reported here are comparable both with previous leaf-level chamber studies and inferences from canopy-level field measurements. In parallel with these laboratory experiments, we have constructed a detailed 1-D atmospheric model to assess the contribution of leaf-level NO(x )deposition to the total NOx loss and NOx canopy fluxes. Using the leaf uptake rates measured in the laboratory, these modeling studies suggest that loss of NOx to deposition in a California oak woodland competes with the pathways of HNO3 and RONO2 formation, with deposition making up 3 %-22 % of the total NOx loss. Additionally, foliar uptake of NOx at these rates could account for similar to 15 %-30 % canopy reduction of soil NO(x )emissions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000446729400004 |
WOS关键词 | NITROGEN-DIOXIDE NO2 ; FREE AMINO-ACIDS ; ABIES L KARST ; REACTIVE NITROGEN ; DRY DEPOSITION ; NITRIC-OXIDE ; PICEA-ABIES ; EDDY COVARIANCE ; GAS-EXCHANGE ; LIQUID WATER |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18431 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA; 2.Univ Paris 06, Dept Chem, Paris, France; 3.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Delaria, Erin R.,Vieira, Megan,Cremieux, Julie,et al. Measurements of NO and NO2 exchange between the atmosphere and Quercus agrifolia[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(19):14161-14173. |
APA | Delaria, Erin R.,Vieira, Megan,Cremieux, Julie,&Cohen, Ronald C..(2018).Measurements of NO and NO2 exchange between the atmosphere and Quercus agrifolia.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(19),14161-14173. |
MLA | Delaria, Erin R.,et al."Measurements of NO and NO2 exchange between the atmosphere and Quercus agrifolia".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.19(2018):14161-14173. |
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