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DOI	10.1016/j.atmosres.2021.105551
	Patterns and trends of ozone and carbon monoxide at Ushuaia (Argentina) observatory
	Adame J.A.; Puentedura O.; Gómez L.; Condorí L.; Carbajal G.; Barlasina M.E.; Yela M.
发表日期	2021
ISSN	1698095
卷号	255
英文摘要	The behavior patterns for surface ozone (O3) and carbon monoxide (CO) were investigated with the hourly mixing ratios registered for nine years (2010 to 2018) at the GAW-WMO (Global Atmospheric Watch – World Meteorological Organization) station of Ushuaia (Argentina). Two behavior patterns were identified for these species after applying a criterion. Specific periods were analyzed in detail, in which nitrogen dioxide (NO2) was also studied. The weather conditions were explored using the ERA5 meteorological fields from the ECMWF (European Centre for Medium-Range Weather Forecasts). Outputs of the chemical transport model from the Copernicus Atmosphere Monitoring Service (CAMS) were used to investigate the spatial distribution of O3, CO and NO2. The more frequent scenario is characterized by the unaltered mixing ratios of O3 and CO for days, with values of 10–15 ppb and 60–70 ppb, respectively, and below 200 ppt for NO2. This pattern occurred with intense westerly airflows associated with the low-pressure system located in the south of the Pacific Ocean. A second pattern was observed in 45.8 ± 3.4% of the days, which was characterized by low O3 mixing ratios (~12 ppb), high NO2 concentrations (above ~3000 ppt) and CO peaks exceeding 400 ppb. This scenario was defined by a high-pressure system blocking the westerly winds, which results in atmospheric stagnation and in the accumulation of trace gases in the lower layers. Finally, the annual trend was explored; no O3 trend was obtained, although an unexpected upward CO trend was identified, with an increase of 1.75 ± 0.49 ppb year−1. To investigate its causes, the annual evolution of the temperature at 850 hPa level (T850) and geopotential height at 500 hPa level (Z500) anomalies along with the CO emissions were analyzed. While no trends were found in weather conditions, the CO emissions showed an increasing trend of 4.4% year−1; therefore, the CO increase could be attributed to the emission changes. In the future, warm climate with more frequent anticyclonic situations, together with a growing trend in emissions, could lead to a drastic change in the current levels of these trace gases, in remote regions such as Ushuaia. © 2021 Elsevier B.V.
英文关键词	carbon monoxide (CO); Copernicus; ERA5; MAXDOAS; nitrogen dioxide (NO2); Surface ozone (O3); Ushuaia
scopus关键词	Atmospheric chemistry; Carbon monoxide; Meteorology; Mixing; Nitrogen oxides; Weather forecasting; Argentina; Carbon monoxide; Copernicu; ERA5; MAX-DOAS; Mixing ratios; Nitrogen dioxide (NO2); NO $-2$; Surface ozone (O3); Ushuaium; Ozone; carbon monoxide; concentration (composition); nitrogen dioxide; ozone; surface area; trace gas; trend analysis; weather forecasting; Argentina; Tierra del Fuego [(PRV) Argentina]; Ushuaia
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177177
作者单位	Atmospheric Sounding Station, El Arenosillo observatory, Atmospheric Research and Instrumentation Branch, National Institute for Aerospace Technology (INTA), Mazagón-Huelva, Spain; Atmospheric Research and Instrumentation Branch, National Institute for Aerospace Technology (INTA), Torrejón de Ardoz, Madrid, Spain; Ushuaia GAW Station, National Meteorological Service (SMN), Ushuaia, Argentina; National Meteorological Service (SMN), Atmospheric Watch and Geophysical (GIDyC – VAYGEO), Buenos Aires, Argentina; Pontificia Universidad Católica Argentina, PEPACG, Facultad de Ingeniería y Ciencias Agrarias, Buenos Aires, Argentina; Meteorological Service (SMN), Atmospheric Watch and Geophysical (GIDyC–VAYGEO), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Adame J.A.,Puentedura O.,Gómez L.,et al. Patterns and trends of ozone and carbon monoxide at Ushuaia (Argentina) observatory[J],2021,255.
APA	Adame J.A..,Puentedura O..,Gómez L..,Condorí L..,Carbajal G..,...&Yela M..(2021).Patterns and trends of ozone and carbon monoxide at Ushuaia (Argentina) observatory.Atmospheric Research,255.
MLA	Adame J.A.,et al."Patterns and trends of ozone and carbon monoxide at Ushuaia (Argentina) observatory".Atmospheric Research 255(2021).