Beschreibung
This book integrates studies of both organic carbon and carbonate in soil and lake sediment in a typical arid region of northwest China.Arid and semi-arid regions cover more than 35% of Earth's land surface. There has been evidence of significant carbon sequestration in various ecosystems, including in deserts, agricultural lands, groundwaters and inland water bodies in arid and semi-arid regions. This book demonstrates that carbonate accumulation greatly exceeds organic carbon in both soil and sediment. It also shows that intensive cropping in the arid land not only increases soil organic carbon stock, but also enhances accumulation of soil carbonate, particularly in subsoils. Carbon accumulation in the lake sediment has increased significantly since 1950. However, there is a large fluctuation in the rate of carbon burial, which is associated with human activity and climate change.This book is of interest to researchers in a number of fields such as soil science, limnology and global change, as well as to the policy-makers.
Autorenporträt
Dr. Xiujun Wang is a professor and chief scientist at the College of Global Change and Earth System Science, Beijing Normal University. She earned a Ph. D. in soil biochemistry (Melbourne University) and Ph. D. in ocean biogeochemistry (University of Tasmania). She was a principal investigator for NASA carbon projects at the University of Maryland during 2005-2013. Her research focuses on the carbon cycle in soils and sediments of north China. Her main accomplishments include the assessment of accumulation rate of carbonate in north China's cropland. She was the president of Biogeoscience Section, Asia-Oceania Geosciences Society during 2014-2016.
