@article {90781,
	title = {A nested grid formulation for chemical transport over Asia: Applications to CO},
	journal = {Journal of Geophysical Research},
	volume = {109},
	year = {2004},
	note = {<a data-url="https://dash.harvard.edu/handle/1/14121840" href="https://dash.harvard.edu/handle/1/14121840" target="_blank" title="">Final Manuscript in DASH</a>},
	abstract = {<span>A global three-dimensional chemical transport model (GEOS-CHEM) was modified to permit treatment of a limited spatial regime with resolution higher than that adopted for the global background. Identified as a one-way nested grid formulation, the model was applied to a simulation of CO over Asia during spring 2001. Differences between results obtained using the nested grid (resolution 1{\textdegree} {\texttimes} 1{\textdegree}), the coarse global model (resolution 4{\textdegree} {\texttimes} 5{\textdegree}), and the intermediate global model (resolution 2{\textdegree} {\texttimes} 2.5{\textdegree}) are discussed. The higher-resolution model allows for more efficient, advection-related, ventilation of the lower atmosphere, reflecting the significance of localized regions of intense upward motion not resolved in a coarser-resolution simulation. Budget analysis suggests that upward transfer to higher altitudes through large-scale advection provides the major sink for CO below 4 km. Horizontal advection, mainly through the north boundary, contributes a net source of CO to the window domain despite the polluted nature of the study region. The nested-grid model is shown to provide good agreement with measurements made during the Transport and Chemical Evolution over the Pacific (TRACE-P) campaign in spring 2001, notably better than the low-resolution model in simulating frontal lifting process and differences across the boundary separating the regions of cyclonic and anticyclonic flow. The high-resolution window approach also allows us to differentiate transport mechanisms for individual subregions of China on a much finer scale than was possible previously. Suggestions are made as to how to allow for subgrid vertical advective motions in the low-resolution model through a carefully designed and broadly tested eddy diffusion treatment.</span>},
	url = {https://dash.harvard.edu/handle/1/14121840},
	author = {Wang, Y.X. and McElroy, M.B. and Jacob, D.J. and Yantosca, R.M.}
}
