非洲上空一氧化碳浓度的时空变化和趋势:MOPITT 数据的启示

IF 2.9 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Air Quality Atmosphere and Health Pub Date : 2023-11-13 DOI:10.1007/s11869-023-01457-3
Chinelo Okpalaonwuka, Sunday Udo, Igwe Ewona
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引用次数: 0

摘要

一氧化碳(CO)是一种间接温室气体,对大气化学有重大影响。本研究利用对流层污染测量(MOPITT)卫星仪器的数据,调查了2000年至2019年非洲上空一氧化碳浓度的时空变化和趋势。研究根据排放清单将非洲分为八个次区域:北半球(NH)、南半球(SH)、干旱(A)、北部半干旱(SAN)、北部热带草原(SNH)、南部热带草原(SSH)、南部半干旱(SAS)和热带雨林(TRF)。研究发现,北半球产生的二氧化碳约占非洲上空二氧化碳总量的 54.07%,而南半球则占 45.93%。研究显示,非洲上空的年平均柱状二氧化碳显著减少,大多数次区域的柱状二氧化碳都显著减少,特别是在北半球窗口。非洲上空的柱状二氧化碳还显示出一种季节性模式,在 DJF(12 月至 2 月)和 SON(9 月至 11 月)有两个峰值,反映了来自两个半球的富集。各分区域的季节性最大值和最小值各不相同。该研究进一步表明,非洲大多数次区域对流层一氧化碳的空间和时间变化对生物质燃烧很敏感,MOPITT CO、MODIS 火数和 MODIS FRP 是用于了解整个非洲一氧化碳传输和火灾排放的关键参数。这项研究对寻求了解一氧化碳对大气化学、空气质量和气候变化的影响的气候研究人员和决策者具有重要意义。
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Spatiotemporal variation and trend in carbon monoxide concentration over Africa: insights from MOPITT Data

Carbon monoxide (CO) is an indirect greenhouse gas that has a significant impact on atmospheric chemistry. This study investigates the spatial and temporal variation and trend in CO concentrations over Africa from 2000 to 2019 using data from the Measurements of Pollution In The Troposphere (MOPITT) satellite instrument. The study classifies Africa into eight subregions based on emission inventories: northern hemisphere (NH), southern hemisphere (SH), arid (A), semi-arid north (SAN), savannah NH (SNH), savannah SH (SSH), semi-arid south (SAS), and tropical rainforest (TRF). It is observed that the northern hemisphere contributes about 54.07% of CO over Africa, while the SH accounts for 45.93%. The research reveals that the annual mean columnar CO over Africa declined significantly, with most subregions exhibiting a significant decrease in columnar CO, particularly over the NH windows. The columnar CO over Africa also revealed a seasonal pattern with two peaks in DJF (December-February) and SON (September–November), reflecting affluence from both hemispheres. The seasonal maxima and minima differ among subregions. The study further demonstrates that the tropospheric CO’s spatial and temporal variability in most subregions in Africa are sensitive to biomass burning, with MOPITT CO, MODIS fire count, and MODIS FRP being key parameters used to understand CO transport and fire emission across Africa. The study is relevant to climate researchers and policymakers seeking to understand the impact of CO on atmospheric chemistry, air quality, and climate change.

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来源期刊
Air Quality Atmosphere and Health
Air Quality Atmosphere and Health ENVIRONMENTAL SCIENCES-
CiteScore
8.80
自引率
2.00%
发文量
146
审稿时长
>12 weeks
期刊介绍: Air Quality, Atmosphere, and Health is a multidisciplinary journal which, by its very name, illustrates the broad range of work it publishes and which focuses on atmospheric consequences of human activities and their implications for human and ecological health. It offers research papers, critical literature reviews and commentaries, as well as special issues devoted to topical subjects or themes. International in scope, the journal presents papers that inform and stimulate a global readership, as the topic addressed are global in their import. Consequently, we do not encourage submission of papers involving local data that relate to local problems. Unless they demonstrate wide applicability, these are better submitted to national or regional journals. Air Quality, Atmosphere & Health addresses such topics as acid precipitation; airborne particulate matter; air quality monitoring and management; exposure assessment; risk assessment; indoor air quality; atmospheric chemistry; atmospheric modeling and prediction; air pollution climatology; climate change and air quality; air pollution measurement; atmospheric impact assessment; forest-fire emissions; atmospheric science; greenhouse gases; health and ecological effects; clean air technology; regional and global change and satellite measurements. This journal benefits a diverse audience of researchers, public health officials and policy makers addressing problems that call for solutions based in evidence from atmospheric and exposure assessment scientists, epidemiologists, and risk assessors. Publication in the journal affords the opportunity to reach beyond defined disciplinary niches to this broader readership.
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