Eintrag weiter verarbeiten
A novel downscaling technique for the linkage of global and regional air quality modeling
Gespeichert in:
| Zeitschriftentitel: | Atmospheric Chemistry and Physics |
|---|---|
| Personen und Körperschaften: | , |
| In: | Atmospheric Chemistry and Physics, 9, 2009, 23, S. 9169-9185 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Copernicus GmbH
|
| Schlagwörter: |
| author_facet |
Lam, Y. F. Fu, J. S. Lam, Y. F. Fu, J. S. |
|---|---|
| author |
Lam, Y. F. Fu, J. S. |
| spellingShingle |
Lam, Y. F. Fu, J. S. Atmospheric Chemistry and Physics A novel downscaling technique for the linkage of global and regional air quality modeling Atmospheric Science |
| author_sort |
lam, y. f. |
| spelling |
Lam, Y. F. Fu, J. S. 1680-7324 Copernicus GmbH Atmospheric Science http://dx.doi.org/10.5194/acp-9-9169-2009 <jats:p>Abstract. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profile data has lost its advocates due to the weakness of the limited horizontal and vertical variations found on the gridded boundary layers. Theoretically, high quality GCTM IC/BC should yield a better result in CMAQ. Unfortunately, several researchers have found that the outputs from GCTM IC/BC are not necessarily better than profile IC/BC due to the excessive transport of O3 aloft in GCTM IC/BC. In this paper, we intend to investigate the effects of using profile IC/BC and global atmospheric model data. In addition, we are suggesting a novel approach to resolve the existing issue in downscaling. In the study, we utilized the GEOS-Chem model outputs to generate time-varied and layer-varied IC/BC for year 2002 with the implementation of tropopause determining algorithm in the downscaling process (i.e., based on chemical (O3) tropopause definition). The comparison between the implemented tropopause approach and the profile IC/BC approach is performed to demonstrate improvement of considering tropopause. It is observed that without using tropopause information in the downscaling process, unrealistic O3 concentrations are created at the upper layers of IC/BC. This phenomenon has caused over-prediction of surface O3 in CMAQ. In addition, the amount of over-prediction is greatly affected by temperature and latitudinal location of the study domain. With the implementation of the algorithm, we have successfully resolved the incompatibility issues in the vertical layer structure between global and regional chemistry models to yield better surface O3 predictions than profile IC/BC for both summer and winter conditions. At the same time, it improved the vertical O3 distribution of CMAQ outputs. It is strongly recommended that the tropopause information should be incorporated into any two-way coupled global and regional models, where the tropospheric regional model is used, to solve the vertical incompatibility that exists between global and regional models. </jats:p> A novel downscaling technique for the linkage of global and regional air quality modeling Atmospheric Chemistry and Physics |
| doi_str_mv |
10.5194/acp-9-9169-2009 |
| facet_avail |
Online Free |
| finc_class_facet |
Physik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hY3AtOS05MTY5LTIwMDk |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hY3AtOS05MTY5LTIwMDk |
| institution |
DE-D275 DE-Bn3 DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Rs1 DE-Pl11 DE-105 DE-14 DE-Ch1 DE-L229 |
| imprint |
Copernicus GmbH, 2009 |
| imprint_str_mv |
Copernicus GmbH, 2009 |
| issn |
1680-7324 |
| issn_str_mv |
1680-7324 |
| language |
English |
| mega_collection |
Copernicus GmbH (CrossRef) |
| match_str |
lam2009anoveldownscalingtechniqueforthelinkageofglobalandregionalairqualitymodeling |
| publishDateSort |
2009 |
| publisher |
Copernicus GmbH |
| recordtype |
ai |
| record_format |
ai |
| series |
Atmospheric Chemistry and Physics |
| source_id |
49 |
| title |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_unstemmed |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_full |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_fullStr |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_full_unstemmed |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_short |
A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_sort |
a novel downscaling technique for the linkage of global and regional air quality modeling |
| topic |
Atmospheric Science |
| url |
http://dx.doi.org/10.5194/acp-9-9169-2009 |
| publishDate |
2009 |
| physical |
9169-9185 |
| description |
<jats:p>Abstract. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profile data has lost its advocates due to the weakness of the limited horizontal and vertical variations found on the gridded boundary layers. Theoretically, high quality GCTM IC/BC should yield a better result in CMAQ. Unfortunately, several researchers have found that the outputs from GCTM IC/BC are not necessarily better than profile IC/BC due to the excessive transport of O3 aloft in GCTM IC/BC. In this paper, we intend to investigate the effects of using profile IC/BC and global atmospheric model data. In addition, we are suggesting a novel approach to resolve the existing issue in downscaling. In the study, we utilized the GEOS-Chem model outputs to generate time-varied and layer-varied IC/BC for year 2002 with the implementation of tropopause determining algorithm in the downscaling process (i.e., based on chemical (O3) tropopause definition). The comparison between the implemented tropopause approach and the profile IC/BC approach is performed to demonstrate improvement of considering tropopause. It is observed that without using tropopause information in the downscaling process, unrealistic O3 concentrations are created at the upper layers of IC/BC. This phenomenon has caused over-prediction of surface O3 in CMAQ. In addition, the amount of over-prediction is greatly affected by temperature and latitudinal location of the study domain. With the implementation of the algorithm, we have successfully resolved the incompatibility issues in the vertical layer structure between global and regional chemistry models to yield better surface O3 predictions than profile IC/BC for both summer and winter conditions. At the same time, it improved the vertical O3 distribution of CMAQ outputs. It is strongly recommended that the tropopause information should be incorporated into any two-way coupled global and regional models, where the tropospheric regional model is used, to solve the vertical incompatibility that exists between global and regional models.
</jats:p> |
| container_issue |
23 |
| container_start_page |
9169 |
| container_title |
Atmospheric Chemistry and Physics |
| container_volume |
9 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792348127679741957 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T18:06:01.064Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=A+novel+downscaling+technique+for+the+linkage+of+global+and+regional+air+quality+modeling&rft.date=2009-12-07&genre=article&issn=1680-7324&volume=9&issue=23&spage=9169&epage=9185&pages=9169-9185&jtitle=Atmospheric+Chemistry+and+Physics&atitle=A+novel+downscaling+technique+for+the+linkage+of+global+and+regional+air+quality+modeling&aulast=Fu&aufirst=J.+S.&rft_id=info%3Adoi%2F10.5194%2Facp-9-9169-2009&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792348127679741957 |
| author | Lam, Y. F., Fu, J. S. |
| author_facet | Lam, Y. F., Fu, J. S., Lam, Y. F., Fu, J. S. |
| author_sort | lam, y. f. |
| container_issue | 23 |
| container_start_page | 9169 |
| container_title | Atmospheric Chemistry and Physics |
| container_volume | 9 |
| description | <jats:p>Abstract. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profile data has lost its advocates due to the weakness of the limited horizontal and vertical variations found on the gridded boundary layers. Theoretically, high quality GCTM IC/BC should yield a better result in CMAQ. Unfortunately, several researchers have found that the outputs from GCTM IC/BC are not necessarily better than profile IC/BC due to the excessive transport of O3 aloft in GCTM IC/BC. In this paper, we intend to investigate the effects of using profile IC/BC and global atmospheric model data. In addition, we are suggesting a novel approach to resolve the existing issue in downscaling. In the study, we utilized the GEOS-Chem model outputs to generate time-varied and layer-varied IC/BC for year 2002 with the implementation of tropopause determining algorithm in the downscaling process (i.e., based on chemical (O3) tropopause definition). The comparison between the implemented tropopause approach and the profile IC/BC approach is performed to demonstrate improvement of considering tropopause. It is observed that without using tropopause information in the downscaling process, unrealistic O3 concentrations are created at the upper layers of IC/BC. This phenomenon has caused over-prediction of surface O3 in CMAQ. In addition, the amount of over-prediction is greatly affected by temperature and latitudinal location of the study domain. With the implementation of the algorithm, we have successfully resolved the incompatibility issues in the vertical layer structure between global and regional chemistry models to yield better surface O3 predictions than profile IC/BC for both summer and winter conditions. At the same time, it improved the vertical O3 distribution of CMAQ outputs. It is strongly recommended that the tropopause information should be incorporated into any two-way coupled global and regional models, where the tropospheric regional model is used, to solve the vertical incompatibility that exists between global and regional models. </jats:p> |
| doi_str_mv | 10.5194/acp-9-9169-2009 |
| facet_avail | Online, Free |
| finc_class_facet | Physik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC9hY3AtOS05MTY5LTIwMDk |
| imprint | Copernicus GmbH, 2009 |
| imprint_str_mv | Copernicus GmbH, 2009 |
| institution | DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Rs1, DE-Pl11, DE-105, DE-14, DE-Ch1, DE-L229 |
| issn | 1680-7324 |
| issn_str_mv | 1680-7324 |
| language | English |
| last_indexed | 2024-03-01T18:06:01.064Z |
| match_str | lam2009anoveldownscalingtechniqueforthelinkageofglobalandregionalairqualitymodeling |
| mega_collection | Copernicus GmbH (CrossRef) |
| physical | 9169-9185 |
| publishDate | 2009 |
| publishDateSort | 2009 |
| publisher | Copernicus GmbH |
| record_format | ai |
| recordtype | ai |
| series | Atmospheric Chemistry and Physics |
| source_id | 49 |
| spelling | Lam, Y. F. Fu, J. S. 1680-7324 Copernicus GmbH Atmospheric Science http://dx.doi.org/10.5194/acp-9-9169-2009 <jats:p>Abstract. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profile data has lost its advocates due to the weakness of the limited horizontal and vertical variations found on the gridded boundary layers. Theoretically, high quality GCTM IC/BC should yield a better result in CMAQ. Unfortunately, several researchers have found that the outputs from GCTM IC/BC are not necessarily better than profile IC/BC due to the excessive transport of O3 aloft in GCTM IC/BC. In this paper, we intend to investigate the effects of using profile IC/BC and global atmospheric model data. In addition, we are suggesting a novel approach to resolve the existing issue in downscaling. In the study, we utilized the GEOS-Chem model outputs to generate time-varied and layer-varied IC/BC for year 2002 with the implementation of tropopause determining algorithm in the downscaling process (i.e., based on chemical (O3) tropopause definition). The comparison between the implemented tropopause approach and the profile IC/BC approach is performed to demonstrate improvement of considering tropopause. It is observed that without using tropopause information in the downscaling process, unrealistic O3 concentrations are created at the upper layers of IC/BC. This phenomenon has caused over-prediction of surface O3 in CMAQ. In addition, the amount of over-prediction is greatly affected by temperature and latitudinal location of the study domain. With the implementation of the algorithm, we have successfully resolved the incompatibility issues in the vertical layer structure between global and regional chemistry models to yield better surface O3 predictions than profile IC/BC for both summer and winter conditions. At the same time, it improved the vertical O3 distribution of CMAQ outputs. It is strongly recommended that the tropopause information should be incorporated into any two-way coupled global and regional models, where the tropospheric regional model is used, to solve the vertical incompatibility that exists between global and regional models. </jats:p> A novel downscaling technique for the linkage of global and regional air quality modeling Atmospheric Chemistry and Physics |
| spellingShingle | Lam, Y. F., Fu, J. S., Atmospheric Chemistry and Physics, A novel downscaling technique for the linkage of global and regional air quality modeling, Atmospheric Science |
| title | A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_full | A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_fullStr | A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_full_unstemmed | A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_short | A novel downscaling technique for the linkage of global and regional air quality modeling |
| title_sort | a novel downscaling technique for the linkage of global and regional air quality modeling |
| title_unstemmed | A novel downscaling technique for the linkage of global and regional air quality modeling |
| topic | Atmospheric Science |
| url | http://dx.doi.org/10.5194/acp-9-9169-2009 |