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In Association with
Spatial and temporal variations in NPP of vegetated land responding to temperature changes for different temperature zones of China
5th International Conference on Earth Science & Climate Change
Shaoying Li
Guangzhou University, PR China
Posters & Accepted Abstracts: J Earth Sci Clim Change
Abstract
Global climate warming closely related to the changes of air temperature is one of the significant problems that humans have been facing. As one of the most important terrestrial ecosystem components, vegetation growth has received increasing interest in the light of global warming. Understanding how vegetation growth responded to rising temperature in recent decades is vital for sustainable of ecosystem development. Net primary productivity (NPP) is a key ecological indicator of terrestrial vegetation growth. With increasing temperature, it is important to characterize the spatio-temporal variation in NPP driven by change of vegetation growing season in the ecosystem. China is zoned into six temperature regions according to the accumulated temperature, given that its various regions receive different levels of solar radiation. The primary purpose of this study is to investigate how changes in temperature have influence NPP of vegetation over different temperature zones of China during the period of 2001-2010. In this study, CASA model was used to estimate NPP. The arithmetic mean, coefficient of variation and linear trend were used to describe the spatio-temporal distribution of temperature and NPP. The results showed that there is significant difference of annual variation in average temperature and seasonal variations of average temperature between various temperature zones. The average annual NPP increased in all the temperature zones with increasing temperature from 2000 to 2010. The NPP seasonal increase trends in the subtropical region are nearly the same as that in the tropical regions. While the increase trends in the warm temperate zone, middle latitude temperate zone, and plateau regions are similar. Global warming increases the NPP in spring as reflected in the tropical and subtropical zones at an early stage.Biography
Shaoying Li has completed her PhD and graduation from Sun Yat-sen University in China. She began to work in Guangzhou University three years ago. Currently, her focus is on Remote Sensing and Geographical Information System area and had published more than 20 papers.
Email: lsy_0130@163.com
