SATELLITE REMOTE SENSING FOR GEOLOGIC CARBON SEQUESTRATION FIELD MONITORING

摘要

Carbon dioxide is one of the major greenhouse gases generated by human activities which, by virtue of its impact on global climate through "Greenhouse Warming", are implicated in extreme environmental impacts such as more prevalent and more intense storms, bushfires, floods, droughts and heat waves. In order to constrain the growth of atmospheric CO_2, Geologic Carbon Sequestration (GCS) has been proposed as a "clean coal" technology for mitigating the more extreme impacts of global warming. However, more understanding of CO_2 storage processes and a confirmation of its effectiveness, so as to minimize environmental, safety, and health impacts in the event of a leak to the atmosphere, is certainly required. In addition, long term GCS must be properly managed. This consists of planning and geologic analysis for the storage site, safe operating practices, careful monitoring of the underground CO_2 during injection period including continuous monitoring subsequent to its injection. GCS monitoring is therefore critical, and is expected to serve multiple purpose - from providing information about safety and environmental concerns, optimizing storage capacity, dealing with unintended leakage and addressing regulatory, legal and social issues. In particular, satellite remote sensing can provide indirect methods to monitor GCS site over short and long periods. Besides, it is a cost effective monitoring technique for large areas associated with sequestration site. This paper discusses the potential of satellite remote sensing for use in GCS, by reference to a variety of tests scenarios.