气候变化领域集成服务门户(CCPortal): Analysis of the temporal variability of CO2; CH4 and CO concentrations at Lamto; West Africa

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DOI	10.1080/16000889.2020.1863707
	Analysis of the temporal variability of CO2; CH4 and CO concentrations at Lamto; West Africa
	Tiemoko T.D.; Ramonet M.; Yoroba F.; Kouassi K.B.; Kouadio K.; Kazan V.; Kaiser C.; Truong F.; Vuillemin C.; Delmotte M.; Wastine B.; Ciais P.
发表日期	2021
ISSN	2806509
起始页码	1
结束页码	24
卷号	73 期号:1
英文摘要	The 10-year observations of the atmospheric molar fractions of CO2, CH4 and CO in West Africa were analyzed using a high precision measurement of the Lamto (LTO) station (6°31 N and 5°02 W) in Côte d’Ivoire. At daily scale, high concentrations appear at night with significant peaks around 7 a.m. local time and minimum concentrations in the afternoon for CO2 and CH4. The CO concentrations show two peaks around 8 h and 20 h corresponding to the maximum in road traffic of a northern motorway located 14 km from the station. The long-term increase rates of CH4 (∼7 ppb year−1) and CO2 (∼2.24 ppm year−1) at Lamto are very close to global trends. The variations of the concentrations of the three gases show strong seasonality with a peak in January for all gases and minima in September for CO2 and CH4, and in June for CO. The CO variation suggests a significant impact of fires on the CO, CO2 and CH4 anomalies in the Lamto region during the dry season (December to February). CO and CH4 show strong correlations (at synoptic-scale and monthly based) in January (r = 0.84), February (r = 0.90), April (r = 0.74), November (r = 0.79) and December (r = 0.72) reflecting similar sources of emission for both gases. The trajectories of polluted air masses at LTO, also indicate continental sources of emission associated with Harmattan winds. © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
英文关键词	carbon dioxide; carbon monoxide; greenhouse gases; Lamto; methane
scopus关键词	atmospheric chemistry; carbon dioxide; carbon monoxide; concentration (composition); greenhouse gas; methane; seasonality; temporal variation; Cote d'Ivoire; Lamto
来源期刊	Tellus, Series B: Chemical and Physical Meteorology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177289
作者单位	UFR SSMT, Laboratory of Atmosphere Physic and Mechanic Fluids, LAPA-MF), University Felix Houphouet-Boigny, Abidjan, Cote d'Ivoire; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Geophysical Station of Lamto (GSL), N’Douci, Cote d'Ivoire; CEA/IRFU/DEDIP, France
推荐引用方式 GB/T 7714	Tiemoko T.D.,Ramonet M.,Yoroba F.,et al. Analysis of the temporal variability of CO2; CH4 and CO concentrations at Lamto; West Africa[J],2021,73(1).
APA	Tiemoko T.D..,Ramonet M..,Yoroba F..,Kouassi K.B..,Kouadio K..,...&Ciais P..(2021).Analysis of the temporal variability of CO2; CH4 and CO concentrations at Lamto; West Africa.Tellus, Series B: Chemical and Physical Meteorology,73(1).
MLA	Tiemoko T.D.,et al."Analysis of the temporal variability of CO2; CH4 and CO concentrations at Lamto; West Africa".Tellus, Series B: Chemical and Physical Meteorology 73.1(2021).