Analysis of air quality in eastern China and its interaction with other regions of the world
Identifieur interne : 001889 ( Main/Exploration ); précédent : 001888; suivant : 001890Analysis of air quality in eastern China and its interaction with other regions of the world
Auteurs : CHUNSHENG ZHAO [République populaire de Chine] ; XUEXI TIE [États-Unis, République populaire de Chine] ; GELI WANG [République populaire de Chine] ; YU QIN [République populaire de Chine] ; PEICAI YANG [République populaire de Chine]Source :
- Journal of atmospheric chemistry [ 0167-7764 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Troposphère, Qualité air, Pollution air, Aérosol, Chimie atmosphérique, Carbone monoxyde, Azote oxyde, Composition chimique, Variation saisonnière, Source pollution, Transport polluant grande distance, Polluant secondaire, Ozone, Distribution concentration, Relation source puits, Simulation numérique, Donnée observation, Observation par satellite, Chine Est, Télédétection spatiale.
- Wicri :
English descriptors
- KwdEn :
- Aerosols, Air pollution, Air quality, Atmospheric chemistry, Carbon monoxide, Chemical composition, Concentration distribution, Long range pollutant transport, Nitrogen oxide, Numerical simulation, Observation data, Ozone, Pollution source, Satellite observation, Seasonal variation, Secondary pollutant, Source sink relationship, Space remote sensing, Troposphere.
Abstract
In this study, we used satellite data (GOME and MOPITT) together with a global chemical-transport-model of atmosphere (MOZART-2) to characterize the chemical/aerosol composition over eastern China. We then estimated the effects of local emissions in China on the chemical budgets in other regions of the world. Likewise, we also investigated the effects of air pollution from other regions on the chemical budget over eastern China. The study shows that the column CO and NOx concentrations are also high in eastern China. The high CO and NOx concentrations produce modest levels of O3 concentrations during summer (about 40 to 50 ppbv) and very low O3 during winter (about 10 to 20 ppbv) in eastern China. The calculated NO2 column is fairly consistent from the GOME measurement. The calculated CO column is underestimated from the MOPITT measurement. One of the reasons of the underestimation of the predicted CO is due to a fact that the CO emissions were taken without considering the rapid increase of emissions from 1990 to 2000. The calculated surface O3 is consistent with the measured values, with strong seasonal variations. However, the measurement is very limited, and more measurements in eastern China will be needed. The column NO2 has a very strong seasonal variation in eastern China, with the highest concentrations during winter and the lowest concentrations during summer. The cause of this seasonal variability is mainly due to the seasonal changes in the chemical loss of NOx, which is very high in summer and very low during winter. The effects of the local emissions in China and long-range transport from other regions on the chemical distributions in eastern China are studied. The results show that NO, concentrations in eastern China are mostly caused by the local emissions in China, especially during the winter. The CO concentration over eastern China is from both the local emissions (30% to 40%) and the transport from other regions. Likewise, the CO emissions in China have an important effect on the other regions of the world, but the effect is limited in the northern hemisphere. The local emissions in China also have an important effect on surface O3 concentrations. During winter, the local emissions reduce the surface O3 concentrations by 30 to 50%. During summer, the local emissions produce about 50 to 70% of the O3 concentration in eastern China.
Affiliations:
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populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName><orgName type="university">Université de Pékin</orgName></affiliation></author><author><name sortKey="Xuexi Tie" sort="Xuexi Tie" uniqKey="Xuexi Tie" last="Xuexi Tie">XUEXI TIE</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>National Center for Atmospheric Research</s1><s2>Boulder, CO</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Colorado</region></placeName></affiliation><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Institute of Atmospheric Physics, Chinese Academic</s1><s2>Beijing</s2><s3>CHN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Geli Wang" sort="Geli Wang" uniqKey="Geli Wang" last="Geli Wang">GELI WANG</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Institute of Atmospheric Physics, Chinese Academic</s1><s2>Beijing</s2><s3>CHN</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Yu Qin" sort="Yu Qin" uniqKey="Yu Qin" last="Yu Qin">YU QIN</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Atmospheric Sciences, School of Physics, PeKing University</s1><s2>Beijing</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>République populaire de Chine</country><placeName><settlement type="city">Pékin</settlement></placeName><orgName type="university">Université de Pékin</orgName></affiliation></author><author><name sortKey="Peicai Yang" sort="Peicai Yang" uniqKey="Peicai Yang" last="Peicai Yang">PEICAI YANG</name><affiliation wicri:level="3"><inist:fA14 i1="03"><s1>Institute of Atmospheric Physics, 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transport</term><term>Nitrogen oxide</term><term>Numerical simulation</term><term>Observation data</term><term>Ozone</term><term>Pollution source</term><term>Satellite observation</term><term>Seasonal variation</term><term>Secondary pollutant</term><term>Source sink relationship</term><term>Space remote sensing</term><term>Troposphere</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Troposphère</term><term>Qualité air</term><term>Pollution air</term><term>Aérosol</term><term>Chimie atmosphérique</term><term>Carbone monoxyde</term><term>Azote oxyde</term><term>Composition chimique</term><term>Variation saisonnière</term><term>Source pollution</term><term>Transport polluant grande distance</term><term>Polluant secondaire</term><term>Ozone</term><term>Distribution concentration</term><term>Relation source puits</term><term>Simulation numérique</term><term>Donnée observation</term><term>Observation par satellite</term><term>Chine Est</term><term>Télédétection spatiale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Aérosol</term><term>Ozone</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this study, we used satellite data (GOME and MOPITT) together with a global chemical-transport-model of atmosphere (MOZART-2) to characterize the chemical/aerosol composition over eastern China. We then estimated the effects of local emissions in China on the chemical budgets in other regions of the world. Likewise, we also investigated the effects of air pollution from other regions on the chemical budget over eastern China. The study shows that the column CO and NO<sub>x</sub> concentrations are also high in eastern China. The high CO and NO<sub>x</sub> concentrations produce modest levels of O<sub>3</sub> concentrations during summer (about 40 to 50 ppbv) and very low O<sub>3</sub> during winter (about 10 to 20 ppbv) in eastern China. The calculated NO<sub>2</sub> column is fairly consistent from the GOME measurement. The calculated CO column is underestimated from the MOPITT measurement. One of the reasons of the underestimation of the predicted CO is due to a fact that the CO emissions were taken without considering the rapid increase of emissions from 1990 to 2000. The calculated surface O<sub>3</sub> is consistent with the measured values, with strong seasonal variations. However, the measurement is very limited, and more measurements in eastern China will be needed. The column NO<sub>2</sub> has a very strong seasonal variation in eastern China, with the highest concentrations during winter and the lowest concentrations during summer. The cause of this seasonal variability is mainly due to the seasonal changes in the chemical loss of NO<sub>x</sub>, which is very high in summer and very low during winter. The effects of the local emissions in China and long-range transport from other regions on the chemical distributions in eastern China are studied. The results show that NO, concentrations in eastern China are mostly caused by the local emissions in China, especially during the winter. The CO concentration over eastern China is from both the local emissions (30% to 40%) and the transport from other regions. Likewise, the CO emissions in China have an important effect on the other regions of the world, but the effect is limited in the northern hemisphere. The local emissions in China also have an important effect on surface O<sub>3</sub> concentrations. During winter, the local emissions reduce the surface O<sub>3</sub> concentrations by 30 to 50%. During summer, the local emissions produce about 50 to 70% of the O<sub>3</sub> concentration in eastern China.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li><li>États-Unis</li></country><region><li>Colorado</li></region><settlement><li>Pékin</li></settlement><orgName><li>Université de Pékin</li></orgName></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Chunsheng Zhao" sort="Chunsheng Zhao" uniqKey="Chunsheng Zhao" last="Chunsheng Zhao">CHUNSHENG ZHAO</name></noRegion><name sortKey="Geli Wang" sort="Geli Wang" uniqKey="Geli Wang" last="Geli Wang">GELI WANG</name><name sortKey="Peicai Yang" sort="Peicai Yang" uniqKey="Peicai Yang" last="Peicai Yang">PEICAI YANG</name><name sortKey="Xuexi Tie" sort="Xuexi Tie" uniqKey="Xuexi Tie" last="Xuexi Tie">XUEXI TIE</name><name sortKey="Yu Qin" sort="Yu Qin" uniqKey="Yu Qin" last="Yu Qin">YU QIN</name></country><country name="États-Unis"><region name="Colorado"><name sortKey="Xuexi Tie" sort="Xuexi Tie" uniqKey="Xuexi Tie" last="Xuexi Tie">XUEXI TIE</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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