Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.01.019 |
Comparing mountain breezes and their impacts on CO2 mixing ratios at three contrasting areas | |
Roman-Cascon, C.1,2; Yague, C.1; Arrillaga, J. A.1; Lothon, M.2; Pardyjak, E. R.3; Lohou, F.2; Inclan, R. M.4; Sastre, M.1; Maqueda, G.1; Derrien, S.2; Meyerfeld, Y.2; Hang, C.3,5; Campargue-Rodriguez, P.2; Turki, I2 | |
2019-06-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2019 |
卷号 | 221页码:111-126 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; France; USA; Australia |
英文摘要 | This work presents the characterisation and comparison of daytime and nighttime mountain breezes observed at three sites through the analysis of tower data. The sites are located: (i) in the foothills of the Guadarrama Mountains in Spain, (ii) on a plateau adjacent to the Pyrenees in France, and (iii) in the Salt Lake Valley (SLV) in the southwest of the United States. The thermally-driven winds are detected through a systematic algorithm which considers both synoptic and local meteorological conditions. The characteristics of the mountain breezes depend on the scale of the breeze at each site. Nighttime events are associated with stronger wind speeds at the two sites located farther away from the mountains due to larger-scale phenomena (valley winds and mountain-plain winds). The arrival of both nighttime and daytime flows to the sites are observed approximately when the buoyancy heat flux changes sign, being a few hours delayed at the sites farther from the mountains. In addition, the impacts of these breezes on CO2 mixing ratios are analysed. The characteristic increase of CO2 mixing ratio observed during the evening transition takes place approximately when the nocturnal breeze arrives at the site. Nonetheless, both processes are not always simultaneous, indicating that CO2 advection is not the main mechanism controlling the drastic CO2 increase. An analogous result is obtained for the CO2 decrease at the morning transition. However, we have found that the CO2 mixing ratio is sensitive to wind direction (horizontal advection) in highly heterogeneous areas like the SLV, where CO2 emissions from the nearby city centre play an important role. Finally, a clear relationship is found between the CO2 mixing ratio and near-surface turbulence at night. Maximum CO2 mixing ratios are found for specific turbulence thresholds, which depend on the height of the CO2 sensor. Conditions associated with both stronger and weaker turbulence levels lead to reduced CO2 mixing ratios at the local measurement height due to excessive and ineffective mixing, respectively. |
英文关键词 | Thermally-driven flows Downslope Upslope CO2 Advection Turbulent mixing |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460716200010 |
WOS关键词 | CARBON-DIOXIDE ; BOUNDARY-LAYER ; EXCHANGE PROCESSES ; ATMOSPHERIC CO2 ; ADVECTION MEASUREMENTS ; FOREST CANOPY ; TALL FOREST ; WATER-VAPOR ; PART I ; TURBULENCE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/183447 |
专题 | 地球科学 |
作者单位 | 1.Univ Complutense Madrid, Dept Fis Tierra & Astrofis, Madrid, Spain; 2.Univ Toulouse Paul Sabatier, Lab Aerol, CNRS, Toulouse, France; 3.Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA; 4.CIEMAT, Dept Environm, Madrid, Spain; 5.Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia |
推荐引用方式 GB/T 7714 | Roman-Cascon, C.,Yague, C.,Arrillaga, J. A.,et al. Comparing mountain breezes and their impacts on CO2 mixing ratios at three contrasting areas[J]. ATMOSPHERIC RESEARCH,2019,221:111-126. |
APA | Roman-Cascon, C..,Yague, C..,Arrillaga, J. A..,Lothon, M..,Pardyjak, E. R..,...&Turki, I.(2019).Comparing mountain breezes and their impacts on CO2 mixing ratios at three contrasting areas.ATMOSPHERIC RESEARCH,221,111-126. |
MLA | Roman-Cascon, C.,et al."Comparing mountain breezes and their impacts on CO2 mixing ratios at three contrasting areas".ATMOSPHERIC RESEARCH 221(2019):111-126. |
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