Potential influence of inter-continental transport of sulfate aerosols on air quality
Identifieur interne : 001317 ( Main/Exploration ); précédent : 001316; suivant : 001318Potential influence of inter-continental transport of sulfate aerosols on air quality
Auteurs : Junfeng Liu [États-Unis] ; Denise L. Mauzerall [États-Unis]Source :
- Environmental Research Letters [ 1748-9326 ] ; 2007.
Abstract
In this study, we compare the potential influence of inter-continental transport of sulfateaerosols on the air quality of (different) continental regions. We use a global chemicaltransport model, Model of Ozone and Related Tracers, version 2 (MOZART-2),to quantify the sourcereceptor relationships of inter-continental transport ofsulfate aerosols among ten regions in 2000. In order to compare the importance offoreign with domestic emissions and to estimate the effect of future changes inemissions on human exposure, we define an influence potential (IP). The IPquantifies the human exposure that occurs in a receptor region as a result of a unit ofSO2 emissions from a source region. We find that due to the non-linear nature of sulfate production, regionswith low SO2 emissions usually have large domestic IP, and vice versa. An exception is East Asia (EA), which has bothhigh SO2 emissions and relatively large domestic IP, mostly caused by the spatialcoincidence of emissions and population. We find that inter-continentalIPs are usually less than domestic IPs by 13 orders of magnitude.SO2 emissions from the Middle East (ME) and Europe (EU) have the largest potential to influencepopulations in surrounding regions. By comparing the IP ratios (IPR) between foreign and domesticSO2 emissions, we find that the IPR values range from 0.00001 to 0.16 andchange with season. Therefore, if reducing human exposure to sulfateaerosols is the objective, all regions should first focus on reducing domesticSO2 emissions. In addition, we find that relatively high IPR values exist among the EU, ME,the former Soviet Union (FSU) and African (AF) regions. Therefore, on the basisof the IP and IPR values, we conclude that a regional agreement among EAcountries, and an inter-regional agreement among EU, ME, FSU and (north) AFregions to control sulfur emissions could benefit public health in these regions.
Url:
DOI: 10.1088/1748-9326/2/4/045029
Affiliations:
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We use a global chemicaltransport model, Model of Ozone and Related Tracers, version 2 (MOZART-2),to quantify the sourcereceptor relationships of inter-continental transport ofsulfate aerosols among ten regions in 2000. In order to compare the importance offoreign with domestic emissions and to estimate the effect of future changes inemissions on human exposure, we define an influence potential (IP). The IPquantifies the human exposure that occurs in a receptor region as a result of a unit ofSO2 emissions from a source region. We find that due to the non-linear nature of sulfate production, regionswith low SO2 emissions usually have large domestic IP, and vice versa. An exception is East Asia (EA), which has bothhigh SO2 emissions and relatively large domestic IP, mostly caused by the spatialcoincidence of emissions and population. We find that inter-continentalIPs are usually less than domestic IPs by 13 orders of magnitude.SO2 emissions from the Middle East (ME) and Europe (EU) have the largest potential to influencepopulations in surrounding regions. By comparing the IP ratios (IPR) between foreign and domesticSO2 emissions, we find that the IPR values range from 0.00001 to 0.16 andchange with season. Therefore, if reducing human exposure to sulfateaerosols is the objective, all regions should first focus on reducing domesticSO2 emissions. In addition, we find that relatively high IPR values exist among the EU, ME,the former Soviet Union (FSU) and African (AF) regions. Therefore, on the basisof the IP and IPR values, we conclude that a regional agreement among EAcountries, and an inter-regional agreement among EU, ME, FSU and (north) AFregions to control sulfur emissions could benefit public health in these regions.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>New Jersey</li></region><orgName><li>Université de Princeton</li></orgName></list><tree><country name="États-Unis"><region name="New Jersey"><name sortKey="Liu, Junfeng" sort="Liu, Junfeng" uniqKey="Liu J" first="Junfeng" last="Liu">Junfeng Liu</name></region><name sortKey="Mauzerall, Denise L" sort="Mauzerall, Denise L" uniqKey="Mauzerall D" first="Denise L" last="Mauzerall">Denise L. Mauzerall</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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