The NASA Water Vapor Project (NVAP) dataset is an existing multisensor, global, daily climate data record of water vapor from 1988-2001. A variety of satellite retrievals of water vapor, both total column and layered, are blended together to create the dataset.

NVAP has been valuable for a variety of studies of phenomena on different timescales. Examples include monsoons, the Madden-Julian Oscillation, and global effects of El Nino. The variety of NVAP users requires a dataset designed to meet the needs of a diverse group. Sample applications of the NVAP dataset will be shown.

A reanalysis and continuation of NVAP beyond 2001 has begun. Current efforts to continue NVAP beyond 2001 into the era of the NASA Aqua spacecraft will be described. The Aqua water vapor products from 2002 to the present are being used to understand the heritage inputs to NVAP, which include SSM/I, TOVS, and AMSU. The overlap between these instruments will allow an understanding of the differences between these datasets, and guide a reanalysis of NVAP. In addition, the Aqua results will themselves be incorporated into the new NVAP dataset.