A Mission-Generic Observation Information Service for Multi-Mission Data Assimilation

Abstract:

The information-level linking between the model analysis and the observed atmospheric state in the level 2 mission data products (L2 data) is a major challenge in utilizing the space-based observations within the atmospheric chemistry modeling and assimilation community. The Multi-Mission Observation Operator (M2O2) team supported by the NASA-ACCESS program has created a streamlined interface mechanism between the atmospheric chemistry model developers and the atmospheric sounding mission data providers. The M2O2 interface mechanism provides the model developers L2^# data by applying a data transformation process to the L2 data to formulate the observation information in a mission-generic data structure. The M2O2 interface mechanism also provides a model transformation process to map the model space to the L2^# observation space.

 

The M2O data transformation process has been integrated within Goddard Earth System Data and Information Service Center (GES DISC) as a web-service for providing “on-demand’ observation information from four types of atmospheric sounding missions, Microwave Limb Sounder (MLS), Tropospheric Emission Spectrometer (TES), Atmospheric Infra-Red Sounder (AIRS), and Atmospheric Carbon Observatory System (ACOS).  The M2O2 model transformation process has been integrated with the GEOS-Chem-Adjoint system that provides inverse modeling of the GEOS-Chem forward modeling system, a global 3-D model of atmospheric chemistry driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the NASA Global Modeling and Assimilation Office (GMAO).

 

We will present the GES-DISC L2^# data services in operation and the GEOS-Chem-Adjoint assimilation applications enabled by the L2^# services.