Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system
Here we present the online meteorology and chemistry adjoint and tangent linear model, WRFPLUS-Chem (Weather Research and Forecasting plus chemistry), which incorporates modules to treat boundary layer mixing, emission, aging, dry deposition, and advection of black carbon aerosol. We also develop la...
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ftdoajarticles:oai:doaj.org/article:c6e1ce89b3094306ae56bc417ca4aa75 2023-05-15T15:11:17+02:00 Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system J. J. Guerrette D. K. Henze 2015-06-01T00:00:00Z https://doi.org/10.5194/gmd-8-1857-2015 https://doaj.org/article/c6e1ce89b3094306ae56bc417ca4aa75 EN eng Copernicus Publications http://www.geosci-model-dev.net/8/1857/2015/gmd-8-1857-2015.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 1991-959X 1991-9603 doi:10.5194/gmd-8-1857-2015 https://doaj.org/article/c6e1ce89b3094306ae56bc417ca4aa75 Geoscientific Model Development, Vol 8, Iss 6, Pp 1857-1876 (2015) Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/gmd-8-1857-2015 2022-12-31T02:49:07Z Here we present the online meteorology and chemistry adjoint and tangent linear model, WRFPLUS-Chem (Weather Research and Forecasting plus chemistry), which incorporates modules to treat boundary layer mixing, emission, aging, dry deposition, and advection of black carbon aerosol. We also develop land surface and surface layer adjoints to account for coupling between radiation and vertical mixing. Model performance is verified against finite difference derivative approximations. A second-order checkpointing scheme is created to reduce computational costs and enable simulations longer than 6 h. The adjoint is coupled to WRFDA-Chem, in order to conduct a sensitivity study of anthropogenic and biomass burning sources throughout California during the 2008 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) field campaign. A cost-function weighting scheme was devised to reduce the impact of statistically insignificant residual errors in future inverse modeling studies. Results of the sensitivity study show that, for this domain and time period, anthropogenic emissions are overpredicted, while wildfire emission error signs vary spatially. We consider the diurnal variation in emission sensitivities to determine at what time sources should be scaled up or down. Also, adjoint sensitivities for two choices of land surface model (LSM) indicate that emission inversion results would be sensitive to forward model configuration. The tools described here are the first step in conducting four-dimensional variational data assimilation in a coupled meteorology–chemistry model, which will potentially provide new constraints on aerosol precursor emissions and their distributions. Such analyses will be invaluable to assessments of particulate matter health and climate impacts. Article in Journal/Newspaper Arctic black carbon Directory of Open Access Journals: DOAJ Articles Arctic Geoscientific Model Development 8 6 1857 1876 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 J. J. Guerrette D. K. Henze Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
topic_facet |
Geology QE1-996.5 |
description |
Here we present the online meteorology and chemistry adjoint and tangent linear model, WRFPLUS-Chem (Weather Research and Forecasting plus chemistry), which incorporates modules to treat boundary layer mixing, emission, aging, dry deposition, and advection of black carbon aerosol. We also develop land surface and surface layer adjoints to account for coupling between radiation and vertical mixing. Model performance is verified against finite difference derivative approximations. A second-order checkpointing scheme is created to reduce computational costs and enable simulations longer than 6 h. The adjoint is coupled to WRFDA-Chem, in order to conduct a sensitivity study of anthropogenic and biomass burning sources throughout California during the 2008 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) field campaign. A cost-function weighting scheme was devised to reduce the impact of statistically insignificant residual errors in future inverse modeling studies. Results of the sensitivity study show that, for this domain and time period, anthropogenic emissions are overpredicted, while wildfire emission error signs vary spatially. We consider the diurnal variation in emission sensitivities to determine at what time sources should be scaled up or down. Also, adjoint sensitivities for two choices of land surface model (LSM) indicate that emission inversion results would be sensitive to forward model configuration. The tools described here are the first step in conducting four-dimensional variational data assimilation in a coupled meteorology–chemistry model, which will potentially provide new constraints on aerosol precursor emissions and their distributions. Such analyses will be invaluable to assessments of particulate matter health and climate impacts. |
format |
Article in Journal/Newspaper |
author |
J. J. Guerrette D. K. Henze |
author_facet |
J. J. Guerrette D. K. Henze |
author_sort |
J. J. Guerrette |
title |
Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
title_short |
Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
title_full |
Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
title_fullStr |
Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
title_full_unstemmed |
Development and application of the WRFPLUS-Chem online chemistry adjoint and WRFDA-Chem assimilation system |
title_sort |
development and application of the wrfplus-chem online chemistry adjoint and wrfda-chem assimilation system |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/gmd-8-1857-2015 https://doaj.org/article/c6e1ce89b3094306ae56bc417ca4aa75 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic black carbon |
genre_facet |
Arctic black carbon |
op_source |
Geoscientific Model Development, Vol 8, Iss 6, Pp 1857-1876 (2015) |
op_relation |
http://www.geosci-model-dev.net/8/1857/2015/gmd-8-1857-2015.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 1991-959X 1991-9603 doi:10.5194/gmd-8-1857-2015 https://doaj.org/article/c6e1ce89b3094306ae56bc417ca4aa75 |
op_doi |
https://doi.org/10.5194/gmd-8-1857-2015 |
container_title |
Geoscientific Model Development |
container_volume |
8 |
container_issue |
6 |
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1857 |
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1876 |
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