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CO_2 Transport, Variability, and Budget over the Southern California Air Basin Using the High-Resolution WRF-VPRM Model during the CalNex 2010 Campaign

Park, Changhyoun and Gerbig, Christoph and Newman, Sally and Ahmadov, Ravan and Feng, Sha and Gurney, Kevin R. and Carmichael, Gregory R. and Park, Soon-Young and Lee, Hwa-Woon and Goulden, Mike and Stutz, Jochen and Peischl, Jeff and Ryerson, Tom (2018) CO_2 Transport, Variability, and Budget over the Southern California Air Basin Using the High-Resolution WRF-VPRM Model during the CalNex 2010 Campaign. Journal of Applied Meteorology and Climatology, 57 (6). pp. 1337-1352. ISSN 1558-8424. https://resolver.caltech.edu/CaltechAUTHORS:20180718-140531656

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Abstract

To study regional-scale carbon dioxide (CO_2) transport, temporal variability, and budget over the Southern California Air Basin (SoCAB) during the California Research at the Nexus of Air Quality and Climate Change (CalNex) 2010 campaign period, a model that couples the Weather Research and Forecasting (WRF) Model with the Vegetation Photosynthesis and Respiration Model (VPRM) has been used. Our numerical simulations use anthropogenic CO_2 emissions of the Hestia Project 2010 fossil-fuel CO_2 emissions data products along with optimized VPRM parameters at “FLUXNET” sites, for biospheric CO_2 fluxes over SoCAB. The simulated meteorological conditions have been validated with ground and aircraft observations, as well as with background CO_2 concentrations from the coastal Palos Verdes site. The model captures the temporal pattern of CO_2 concentrations at the ground site at the California Institute of Technology in Pasadena, but it overestimates the magnitude in early daytime. Analysis of CO_2 by wind directions reveals the overestimate is due to advection from the south and southwest, where downtown Los Angeles is located. The model also captures the vertical profile of CO_2 concentrations along with the flight tracks. The optimized VPRM parameters have significantly improved simulated net ecosystem exchange at each vegetation-class site and thus the regional CO_2 budget. The total biospheric contribution ranges approximately from −24% to −20% (daytime) of the total anthropogenic CO_2 emissions during the study period.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1175/JAMC-D-17-0358.1DOIArticle
ORCID:
AuthorORCID
Gerbig, Christoph0000-0002-1112-8603
Newman, Sally0000-0003-0710-995X
Feng, Sha0000-0002-2376-0868
Gurney, Kevin R.0000-0001-9218-7164
Peischl, Jeff0000-0002-9320-7101
Alternate Title:CO2 Transport, Variability, and Budget over the Southern California Air Basin Using the High-Resolution WRF-VPRM Model during the CalNex 2010 Campaign
Additional Information:© 2018 American Meteorological Society.
Subject Keywords:Air quality; Greenhouse gases; Regional effects; Biosphere-atmosphere interaction
Issue or Number:6
Record Number:CaltechAUTHORS:20180718-140531656
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180718-140531656
Official Citation:Park, C., C. Gerbig, S. Newman, R. Ahmadov, S. Feng, K.R. Gurney, G.R. Carmichael, S. Park, H. Lee, M. Goulden, J. Stutz, J. Peischl, and T. Ryerson, 2018: CO2 Transport, Variability, and Budget over the Southern California Air Basin Using the High-Resolution WRF-VPRM Model during the CalNex 2010 Campaign. J. Appl. Meteor. Climatol., 57, 1337–1352, https://doi.org/10.1175/JAMC-D-17-0358.1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87963
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Jul 2018 21:16
Last Modified:09 Mar 2020 13:19

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