Advancement in understanding, predicting and mitigating against adverse urban climate change implies collaboration, close monitoring of Essential Climate Variables (ECV)'s related to urban climate change, consensus among subject matter experts/leaders, and effective action with specific thematic focus on human and environmental impacts. Towards this end, NCDC's Scientific Data Stewardship (SDS) Team created CLIO , an online tool and functional “proof-of-concept” interactive prototype. CLIO is capable of accepting and displaying Web-based input from Subject Matter Expert (SME)'s providing a global to urban scale perspective of all Essential Climate Variable (ECV)'s and their impacts upon climate. International leadership in conjunction with the United Nations, Intergovernmental Panel on Climate Change (IPCC) and the recent G8 Summit in Japan indicate value in building consensus and monitoring climatic change ECV's. Developing an effective action plan from global consensus may be achieved through national and international collaboration based upon the integration of Community Weighted Value (CWV)'s of relevant climate change ECV's. CLIO may assist in the implementation of an effective action plan by providing a useful mechanism that integrates aggregate consensus of national CWV's of relevant ECV's from SME's and leadership. Action plan implementation will necessarily focus upon using appropriate technologies in fighting adverse global climate change and in-situ disasters. CLIO is capable of displaying the readiness levels of these technologies and their relationships to climate change ECV's. CLIO rapidly identifies feasibilities, weaknesses/strengths in monitoring urban climate change ECV's and of associated Technology Readiness Level (TRL)'s. Numerous venues of satellite, in-situ TRL's and their feasibility values are provided corresponding to climate change ECV's. CLIO provides urban, agricultural and scientific feasibility and CWV's of these TRL's that are vetted by SME's. Satellite technologies (Imagery, LIDAR, RADAR, Radiometry, Soundings, etc.) and In-Situ technologies (Soundings, XP Floats, etc.) can be vetted by urban climatology SME's. SME's will be able to access and interact with temporal data from the past, present, and for future planning of products, datasets, dataset versions , instruments, platforms and networks. CLIO offers quantifiable prioritization of ECV impacts that effectively deal with climate change issues, its associated impacts upon urban climate, and offers an intuitively objective collaboration and consensus building tool.