In:
Journal of Applied Meteorology and Climatology, American Meteorological Society, Vol. 57, No. 6 ( 2018-06), p. 1337-1352
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.
Type of Medium:
Online Resource
ISSN:
1558-8424
,
1558-8432
DOI:
10.1175/JAMC-D-17-0358.1
DOI:
10.1175/JAMC-D-17-0358.s1
Language:
Unknown
Publisher:
American Meteorological Society
Publication Date:
2018
detail.hit.zdb_id:
2227779-1
detail.hit.zdb_id:
2227759-6
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