Global change refers to planetary-scale changes in the Earth system.
More completely, the term “global change" encompasses: planetary scale changes to atmospheric circulation, ocean circulation, climate, the carbon cycle, the nitrogen cycle, the water cycle and other cycles, sea-ice changes, sea-level changes, food webs, biological diversity, pollution, health, fish stocks, and more.
Civilization is now a large driver of global change so the term includes population, the economy, resource use, energy, development, transport, communication, land use and land cover, urbanization, globalization.
Some Earth system changes, natural or driven by humans, can have significant consequences without involving changes in climate. Global change should not be confused with climate change; it is significantly more. indeed, climate change is part of this much larger challenge (IGBP, 2020).
Prof. of Remote Sensing and Earth Systems Science and Director Computational & Data Sciences Graduate Programs at the Center of Excellence in Earth Systems Modeling & Observations Schmid College of Science and Technology, Chapman University, USA
Prof. El-Askary received his Ph.D. in Computational Sciences and Informatics from George Mason University in 2004 along with his two MS degrees in Computational sciences and Earth Systems Sciences. He is also a Professor of Environmental Physics on leave with the Department of Environmental Sciences, Faculty of Science, Alexandria University, Egypt. Prof. El-Askary was also affiliated with the National Authority of Remote Sensing and Space Sciences (NARSS), Cairo.