The authors would like to acknowledge John Farley, Andrey Savtchenko, Hualan Rui, Christopher Lynnes, Peter Smith, Zhong Liu, and Wenli Yang for their helps in understanding and providing data from the A-Train Data Depot and understanding Giovanni version 3 system at GES DISC. Many thanks come to Dr. James G. Acker and Dr. Barry M. Schlesinger for their detailed modifications and comments to the paper.

The GES DISC is supported by the NASA Headquarter Science Mission Directorate’s Earth-Sun System Division through ROSES 2005 NNH05ZDA001N-ACCESS. Authors affiliated with Center for Spatial Information Science and Systems, George Mason University has a cooperated agreement with GES DISC (Agreement No.: NNX06AD35A, Center Director: Dr. Liping Di).

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