What are the major problems/limitations in the current standard model? Lack of tagged CO 2 and CH 4 (and others?) functionality in the standard model Hardwired.

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Presentation transcript:

What are the major problems/limitations in the current standard model? Lack of tagged CO 2 and CH 4 (and others?) functionality in the standard model Hardwired regional definitions for tagged CO, which are difficult to modify Inconsistencies in inventories and PBL mixing in tagged CO (CO 2 ?) runs Old tropospheric OH fields and stratospheric chemistry - stratospheric chemistry based on Harvard 2-D model Inability to run with GEOS-5 before 2004 with MERRA fields (especially critical for CO 2, which require long runs) Biogenic emissions - CO too high in the southern hemisphere

What are on-going development activities in this area? Updated tagged CO simulation with newer OH and flexible tags (Duke) Updated tagged CO 2 (with flexible tags) and new anthropogenic CO 2 emissions (Toronto) Forward modeling of CH 4 - new emission inventories (Purdue, Edinburgh, and Harvard) CH 4 isotope fire anomalies (UC Irvine/Duke) COS simulation (East Anglia) Development of tagged CH 4 (Harvard, Edinburgh) and CH 4 isotopes simulation (EPFL) Forward model simulation for ethanol and acetaldehyde (Minnesota) Development of a tagged methanol simulation (Minnesota) Development of a generic tagged tracer simulation (Duke)

Priorities Implement a flexible region mask for the tagged simulations Update stratospheric production and loss rates using fields from the GMI COMBO model Ensure that the variable tropopause feature works with the tagged simulations Ensure consistency in emissions/PBL mixing in tagged simulations Examine mismatch between the total CO tracer and the sum of the tagged tracers to ensure there is no mass conservation issue Archive OH fields from 1-year benchmarks and make them available to users for the tagged simulations Incorporate tagged CO 2, CH 4, and methanol capability into the standard model Develop a combined forward model simulation for CO and CO 2 Add capability for MERRA fields Generic tagged tracer module?