GEOGLOWS SEEKS TO ENABLE EARTH SCIENTISTS TO SOLVE THE CHALLENGES ASSOCIATED WITH ACHIEVING GLOBAL WATER SUSTAINABILITY. PROVIDING AMPLE CLEAN WATER IS ALSO AN ELEMENT OF THE UN S SUSTAINABLE DEVELOPMENT GOALS AND IS CROSS-CUTTING WITH OTHER ELEMENTS INCLUDING FOOD SECURITY CLIMATE HEALTH ENERGY AND LIFE BELOW WATER AND ON LAND. EARTH OBSERVATIONS PROVIDE A CRITICAL AND EXPANDING RESOURCE TO THE GROUP ON EARTH OBSERVATIONS (GEO) COMMUNITY AND ARE VITAL TO THE SUCCESS OF ACHIEVING IMPORTANT GEO OBJECTIVES. AS EARTH SCIENCE DATA INCREASE IN AVAILABILITY FREQUENCY AND RESOLUTION THERE IS A GROWING NEED FOR FLEXIBLE DATA ANALYSIS ENVIRONMENTS THAT EMPOWER USERS TO EXPLORE ANALYZE AND MODEL EARTH OBSERVATION DATA IN A SOFTWARE-AS-A-SERVICE WEB-BASED ENVIRONMENT. HERE WE PROPOSE A CRITICAL PIECE OF EARTH SCIENCE CYBERINFRASTRUCTURE (CI) FOR THE GEOGLOWS AND LARGER GEO SOFTWARE ECOSYSTEM TO OVERCOME THE LIMITATIONS OF STORAGE PROCESSING SPEED TRANSMISSION BANDWIDTH AND PLATFORM DEPENDENCY ASSOCIATED WITH DESKTOP COMPUTING. HIGHLY INTERACTIVE USER-FRIENDLY WEB APPLICATIONS OR WEB APPS SERVE A KEY ROLE ACTING AS A MEDIUM FOR VISUALIZING AND CONVEYING SCIENTIFIC DATA TO STAKEHOLDERS AND DECISION-MAKERS. SUCH WEB APPS CAN PROVIDE ACCESS TO COMPLEX COMPUTATIONAL BACK-END SERVICES DISTRIBUTED DATA REPOSITORIES AND THEIR CONNECTED MODELING SYSTEMS. DESPITE THIS POTENTIAL THE TECHNICAL EXPERTISE REQUIRED TO DEVELOP WEB APPS REPRESENTS A FORMIDABLE BARRIER FOR MOST RESEARCHERS FROM THE GEO COMMUNITY. WE HAVE DEVELOPED THE OPEN SOURCE TETHYS PLATFORM WHICH IN TURN HAS BEEN USED TO DEVELOP DECISION SUPPORT WEB APPS FOR THE NASA-SERVIR AND NASA-ACCESS PROGRAMS NOAA S NEW NATIONAL WATER MODEL AND IN AMERIGEOSS CAPACITY-BUILDING WORKSHOPS. WE WILL BUILD ON THE EXISTING TETHYS CI TO CREATE AN AMERIGEOSS APP WAREHOUSE FOR RAPID DEPLOYMENT OF OPEN SOURCE HYDROINFORMATICS APPS FOR MANAGING AND USING ESSENTIAL WATER RESOURCES VARIABLES IN SUPPORT OF THE GEOGLOWS INITIATIVE. OUR SPONSORS AND COLLABORATORS AT THE USGS FEDERAL GEOGRAPHIC DATA COMMISSION (FGDC) HAVE ALREADY IDENTIFIED TETHYS PLATFORM AS A RESOURCE FOR THE AMERIGEOSS PORTAL CURRENTLY UNDER THEIR DEVELOPMENT. WE WILL WORK TOGETHER WITH THE FGDC TO SUCCESSFULLY INTEGRATE OUR SOLUTION INTO THEIR EXISTING AMERIGEOSS AND/OR GEOPLATFORM PORTALS. AN IMPORTANT ELEMENT OF THE AMERIGEOSS APP WAREHOUSE WILL BE THE ABILITY TO NOT ONLY DISCOVER AND INSTALL EXISTING APPS BUT ALSO TO CONTRIBUTE APPS THAT ARE DEVELOPED BY AN EVERGROWING COMMUNITY OF EARTH SCIENTISTS. TO DEMONSTRATE THE UTILITY OF OUR SOLUTION AND PROVIDE A CASE STUDY FOR CAPACITY-BUILDING WE WILL WORK WITH COLLABORATORS ON AN EXISTING NASA ROSES PROJECT FOCUSED ON USING EARTH OBSERVATIONS FOR IMPROVED AGRICULTURAL AND WATER RESOURCES MANAGEMENT. THIS COLLABORATION WILL ENHANCE THE OUTCOMES OF THEIR PROJECT BY PROVIDING VISUALIZATION AND DECISION MAKING TOOLS IN SUPPORT OF VITAL SDGS RELATED TO WATER AND FOOD SECURITY AT BOTH REGIONAL AND LOCAL SCALES. THE TETHYS-POWERED AMERIGEOSS APP WAREHOUSE PROVIDES THE FOLLOWING SIGNIFICANT POSITIVE OUTCOMES: 1. WHILE TARGETING THE GEOGLOWS ESSENTIAL WATER VARIABLES GEO PROGRAM ELEMENT IT IS CROSS-CUTTING AND ACHIEVES DEMONSTRABLE PROGRESS AND RESULTS FOR AMERIGEOSS GLOBAL FLOOD RISK MONITORING AND OTHER GEO WORK PROGRAM ELEMENTS. 2. ADVANCES THE USE OF EARTH OBSERVATIONS IN DECISION MAKING WITH IMPACTS ON MULTIPLE PREVIOUSLY AND ONGOING FUNDED PROJECTS OF NASA AND OTHER USGEO PARTNERS. 3. SIGNIFICANT LIKELIHOOD OF ACHIEVING A HIGH APPLICATION READINESS LEVEL THROUGH PARTNERING WITH THE FGDC TO INTEGRATE WITHIN THE AMERIGEOSS PORTAL. 4. INCREASE INTERNATIONAL COLLABORATION AND BROADEN USGEO INVOLVEMENT. 5. BRING TOOLS PREVIOUSLY CREATED AND DEVELOP OTHERS THAT ENHANCE THE ABILITY OF US AND INTERNATIONAL ORGANIZATIONS TO BETTER UNDERSTAND ANALYZE AND ADDRESS NEEDS RELATIVE TO MULTIPLE UN SUSTAINABLE DEVELOPMENT GOALS.