This session focuses on multiple processes analysis and simulation including but not limited to land–atmosphere water and energy cycles in arid and semiarid regions, where water resources and ecosystems are vulnerable to climate change. To investigate the water and energy cycle over arid and semiarid regions, the  impact of irrigation and ground water (pumping) dynamics, and vegetation dynamics are tested, analyzed and compared from offline land surface modeling and coupled NWP model to those based on reanalysis product, remote sensing, and in situ observations. Furthermore, accuracy, uncertainty, and error analysis for each individual energy and water component is useful for physical processes understanding and data product application. The temporal scale covers from hourly to interannual and spatial scale covers from local, watershed, regional and global scale. In addition, application of these data and products to drought/flood formation mechanism, monitoring and prediction, agricultural and water resource management, and long-term trend analysis are also welcome.

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