Inversion structure and winter ozone distribution in the Uintah Basin, Utah, U.S.A.
Inversion structure and winter ozone distribution in the Uintah Basin, Utah, U.S.A.
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DOI：
10.1016/j.atmosenv.2015.10.067
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发表时间：
2015-12
影响因子：
5
通讯作者：
S. Lyman;T. Tran
中科院分区：
文献类型：
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作者：
S. Lyman;T. Tran
美国犹他州的尤因塔盆地在某些冬季会出现高浓度的臭氧，这是由于连续多日的强烈逆温，促进了当地污染源（包括石油和天然气工业）的积累。总之，监测点的海拔和接近石油和天然气威尔斯解释了逆温事件期间地面臭氧浓度高达90%的空间变异性（即，R2= 0.90）。逆温条件在低海拔地区开始得更早，持续时间更长，至少部分原因是低海拔地区与高空风的绝缘性更好，高空风会降低逆温条件并稀释产生的臭氧。逆温条件下的地面空气输送主要是由限制净输送距离的光，昼夜上坡下坡流。因此，该盆地的不同区域彼此相对孤立，使得海拔和接近源等空间因素对个别地点的臭氧浓度产生强烈影响。
The Uintah Basin in Utah, U.S.A. experiences high concentrations of ozone during some winters due to strong, multi-day temperature inversions that facilitate the buildup of pollution from local sources, including the oil and gas industry. Together, elevation of monitoring sites and proximity to oil and gas wells explain as much as 90% of spatial variability in surface ozone concentrations during inversion episodes (i.e., R2= 0.90). Inversion conditions start earlier and last longer at lower elevations, at least in part because lower elevations are more insulated from winds aloft that degrade inversion conditions and dilute produced ozone. Surface air transport under inversions is dominated by light, diurnal upslope–downslope flow that limits net transport distances. Thus, different areas of the Basin are relatively isolated from each other, allowing spatial factors like elevation and proximity to sources to strongly influence ozone concentrations at individual sites.