Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation
<p>Chemistry plays an indispensable role in investigations of the atmosphere; however, many climate models either ignore or greatly simplify atmospheric chemistry, limiting both their accuracy and their scope. We present the development and evaluation of the online global atmospheric chemical...
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-08-01
|
| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/13/3817/2020/gmd-13-3817-2020.pdf |
| id |
doaj-6e316451548a48f7924e84665d5cad2a |
|---|---|
| record_format |
Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
X. Lu X. Lu L. Zhang T. Wu M. S. Long J. Wang D. J. Jacob F. Zhang J. Zhang S. D. Eastham L. Hu L. Zhu L. Zhu L. Zhu X. Liu M. Wei |
| spellingShingle |
X. Lu X. Lu L. Zhang T. Wu M. S. Long J. Wang D. J. Jacob F. Zhang J. Zhang S. D. Eastham L. Hu L. Zhu L. Zhu L. Zhu X. Liu M. Wei Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation Geoscientific Model Development |
| author_facet |
X. Lu X. Lu L. Zhang T. Wu M. S. Long J. Wang D. J. Jacob F. Zhang J. Zhang S. D. Eastham L. Hu L. Zhu L. Zhu L. Zhu X. Liu M. Wei |
| author_sort |
X. Lu |
| title |
Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation |
| title_short |
Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation |
| title_full |
Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation |
| title_fullStr |
Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation |
| title_full_unstemmed |
Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluation |
| title_sort |
development of the global atmospheric chemistry general circulation model bcc-geos-chem v1.0: model description and evaluation |
| publisher |
Copernicus Publications |
| series |
Geoscientific Model Development |
| issn |
1991-959X 1991-9603 |
| publishDate |
2020-08-01 |
| description |
<p>Chemistry plays an indispensable role in investigations of the atmosphere;
however, many climate models either ignore or greatly simplify atmospheric
chemistry, limiting both their accuracy and their scope. We present the
development and evaluation of the online global atmospheric chemical model
BCC-GEOS-Chem v1.0, coupling the GEOS-Chem chemical transport model (CTM) as
an atmospheric chemistry component in the Beijing Climate Center atmospheric
general circulation model (BCC-AGCM). The GEOS-Chem atmospheric chemistry
component includes detailed tropospheric
<span class="inline-formula">HO<sub><i>x</i></sub></span>–<span class="inline-formula">NO<sub><i>x</i></sub></span>–volatile organic compounds–ozone–bromine–aerosol chemistry and online dry and wet
deposition schemes. We then demonstrate the new capabilities of
BCC-GEOS-Chem v1.0 relative to the base BCC-AGCM model through a 3-year
(2012–2014) simulation with anthropogenic emissions from the Community
Emissions Data System (CEDS) used in the Coupled Model Intercomparison
Project Phase 6 (CMIP6). The model captures well the spatial distributions
and seasonal variations in tropospheric ozone, with seasonal mean biases of
0.4–2.2 ppbv at 700–400 hPa compared to satellite observations and within 10 ppbv at the surface to 500 hPa compared to global ozonesonde observations. The
model has larger high-ozone biases over the tropics which we attribute to an
overestimate of ozone chemical production. It underestimates ozone in the
upper troposphere which is likely due either to the use of a simplified
stratospheric ozone scheme or to biases in estimated
stratosphere–troposphere exchange dynamics. The model diagnoses the global
tropospheric ozone burden, OH concentration, and methane chemical lifetime
to be 336 Tg, <span class="inline-formula">1.16×10<sup>6</sup></span> molecule cm<span class="inline-formula"><sup>−3</sup></span>, and 8.3 years, respectively, which is consistent with recent multimodel assessments. The
spatiotemporal distributions of <span class="inline-formula">NO<sub>2</sub></span>, CO, <span class="inline-formula">SO<sub>2</sub></span>, <span class="inline-formula">CH<sub>2</sub>O</span>, and
aerosol optical depth are generally in agreement with satellite
observations. The development of BCC-GEOS-Chem v1.0 represents an important
step for the development of fully coupled earth system models (ESMs) in
China.</p> |
| url |
https://gmd.copernicus.org/articles/13/3817/2020/gmd-13-3817-2020.pdf |
| work_keys_str_mv |
AT xlu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT xlu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT lzhang developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT twu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT mslong developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT jwang developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT djjacob developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT fzhang developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT jzhang developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT sdeastham developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT lhu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT lzhu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT lzhu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT lzhu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT xliu developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation AT mwei developmentoftheglobalatmosphericchemistrygeneralcirculationmodelbccgeoschemv10modeldescriptionandevaluation |
| _version_ |
1724479385941049344 |
| spelling |
doaj-6e316451548a48f7924e84665d5cad2a2020-11-25T03:53:13ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032020-08-01133817383810.5194/gmd-13-3817-2020Development of the global atmospheric chemistry general circulation model BCC-GEOS-Chem v1.0: model description and evaluationX. Lu0X. Lu1L. Zhang2T. Wu3M. S. Long4J. Wang5D. J. Jacob6F. Zhang7J. Zhang8S. D. Eastham9L. Hu10L. Zhu11L. Zhu12L. Zhu13X. Liu14M. Wei15Laboratory for Climate and Ocean–Atmosphere Sciences, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaSchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USALaboratory for Climate and Ocean–Atmosphere Sciences, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, ChinaBeijing Climate Center, China Meteorological Administration, Beijing 100081, ChinaSchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USADepartment of Chemical and Biochemical Engineering, and Center for Global and Regional Environmental Research, The University of Iowa, Iowa City, IA 52242, USASchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USABeijing Climate Center, China Meteorological Administration, Beijing 100081, ChinaBeijing Climate Center, China Meteorological Administration, Beijing 100081, ChinaLaboratory for Aviation and the Environment, Massachusetts Institute of Technology, Cambridge, MA 02139, USADepartment of Chemistry and Biochemistry, University of Montana, Missoula, MT 59812, USASchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USAHarvard–Smithsonian Center for Astrophysics, Cambridge, MA 02138, USASchool of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, ChinaHarvard–Smithsonian Center for Astrophysics, Cambridge, MA 02138, USANational Meteorological Information Center, China Meteorological Administration, Beijing 100871, China<p>Chemistry plays an indispensable role in investigations of the atmosphere; however, many climate models either ignore or greatly simplify atmospheric chemistry, limiting both their accuracy and their scope. We present the development and evaluation of the online global atmospheric chemical model BCC-GEOS-Chem v1.0, coupling the GEOS-Chem chemical transport model (CTM) as an atmospheric chemistry component in the Beijing Climate Center atmospheric general circulation model (BCC-AGCM). The GEOS-Chem atmospheric chemistry component includes detailed tropospheric <span class="inline-formula">HO<sub><i>x</i></sub></span>–<span class="inline-formula">NO<sub><i>x</i></sub></span>–volatile organic compounds–ozone–bromine–aerosol chemistry and online dry and wet deposition schemes. We then demonstrate the new capabilities of BCC-GEOS-Chem v1.0 relative to the base BCC-AGCM model through a 3-year (2012–2014) simulation with anthropogenic emissions from the Community Emissions Data System (CEDS) used in the Coupled Model Intercomparison Project Phase 6 (CMIP6). The model captures well the spatial distributions and seasonal variations in tropospheric ozone, with seasonal mean biases of 0.4–2.2 ppbv at 700–400 hPa compared to satellite observations and within 10 ppbv at the surface to 500 hPa compared to global ozonesonde observations. The model has larger high-ozone biases over the tropics which we attribute to an overestimate of ozone chemical production. It underestimates ozone in the upper troposphere which is likely due either to the use of a simplified stratospheric ozone scheme or to biases in estimated stratosphere–troposphere exchange dynamics. The model diagnoses the global tropospheric ozone burden, OH concentration, and methane chemical lifetime to be 336 Tg, <span class="inline-formula">1.16×10<sup>6</sup></span> molecule cm<span class="inline-formula"><sup>−3</sup></span>, and 8.3 years, respectively, which is consistent with recent multimodel assessments. The spatiotemporal distributions of <span class="inline-formula">NO<sub>2</sub></span>, CO, <span class="inline-formula">SO<sub>2</sub></span>, <span class="inline-formula">CH<sub>2</sub>O</span>, and aerosol optical depth are generally in agreement with satellite observations. The development of BCC-GEOS-Chem v1.0 represents an important step for the development of fully coupled earth system models (ESMs) in China.</p>https://gmd.copernicus.org/articles/13/3817/2020/gmd-13-3817-2020.pdf |