Global change involves complex and far-reaching variations in the Earth’s systems, and satellite observations have been widely used in global change studies. Over the past five decades, Earth observation has developed into a comprehensive system that can conduct dynamic monitoring of the land, the oceans and the atmosphere at the local, regional and even global scale. At the same time, although a large number of Earth observation satellites have been launched, very few of them are used in global change studies. The lack of scientific satellite programs greatly hinders research on global change. This book proposes using a series of global change scientific satellites to establish a scientific observation grid for global environmental change monitoring from space, and offers the first comprehensive review of lunar-based Earth observation. These scientific satellites could provide not only basic datasets but also scientific support in facilitating advances in international global change research.

This AQUASTAT report presents the most recent information available on water availability and its use in the 18 countries and territories in the Middle East region, with an emphasis on agricultural water use and management. It contains the relevant tables and maps, and a regional synopsis emphasizing the subregional characteristics of this large and diverse region. It also analyses the changes that have occurred since the first survey in 1997. Finally it gives a more detailed description of four transboundary river basins in the region, highlighting the different levels of cooperation and the agreements between countries located in the same river basin: the Euphrates-Tigris River Basin, the Kura-Araks River Basin, the Asi-Orontes River Basin and the Jordan River Basin.