In order to understand the needs of the mass change applications community, we invite you to participate in a brief survey, and we encourage you to forward this invitation to other potential data users. This survey targets current and potential end-users of mass change mission data products, and its goal is to understand the needs of those end-users. The results will be used to help guide mission architecture design, evaluate tradeoffs, and ensure that the data products are optimized for a broad user community.
Past and current NASA gravity missions, GRACE (2002-2017) and GRACE Follow On (GRACE-FO, launched 2018) have provided monthly mass anomaly maps beginning in 2002. The major time-varying signal measured by GRACE and GRACE-FO is redistribution of water mass within the Earth system. The principal dynamics causing redistribution include changes due to surface and deep currents in the ocean, changes in the water stored on and beneath the land surface, glacier losses, and exchanges between ice sheets and the ocean. The effective spatial resolution of the GRACE and GRACE-FO observations is too coarse for many local scale applications. However, when used in combination with other complementary data sets and terrestrial hydrology models, these observations have offered enhanced insights on processes at higher spatial and temporal resolutions. The chief advantage GRACE and GRACE-FO have over other space observations is completeness in capturing integrated mass changes at and beneath the land surface. These observations create the potential for applications in water resources (drought monitoring and related fire hazard assessments, flood risk evaluation, regional water budget analysis including quantification of groundwater depletion), surveying and navigation (highly accurate global geoid models), natural disasters (i.e., operational modeling to support improved planning and mitigation activities in earthquake-prone regions), and climate-related applications (ice sheet and glacier mass change monitoring, and non-steric sea level rise assessment).
Please take a few moments to complete the survey. If you wish to receive information about related activities in the future, please provide your contact information in question number 14.