Recommendation 5.1: The committee reiterates the statements of previous reports that call on the United States to continue and to augment the support for Earth observations and to address the potential for serious gaps in the spacebased observation system. A particular priority should be maintaining fundamental climate-quality observational data sets that have been gathered for 20 years or longer.

Recommendation 5.2: To better synthesize the diversity of climate-relevant observations, the United States should establish a national Earth system data assimilation effort that builds from existing efforts and merges weather observations, satellite radiances or retrievals for precipitation and various trace constituents, ocean measurements, and land and other observations into the same Earth system model simultaneously.

Recommendation 5.3: Building from existing efforts, the United States should develop a national IT infrastructure for Earth system data so as to facilitate and accelerate data display, visualization, and analysis.

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