干旱区生态环境知识资源中心(Arid): Changes in dryland areas and net primary productivity in China from 1980 to 2020

Arid

DOI	10.1007/s12040-023-02100-6
	Changes in dryland areas and net primary productivity in China from 1980 to 2020
	Zhang, Shihang; Chen, Yusen; Guo, Hao; Lu, Yongxing; Guo, Xing; Liu, Chaohong; Zhou, Xiaobing; Zhang, Yuanming
通讯作者	Zhou, XB
来源期刊	JOURNAL OF EARTH SYSTEM SCIENCE
ISSN	2347-4327
EISSN	0973-774X
出版年	2023
卷号	132 期号:2
英文摘要	The drylands of China account for about 10.8% of the global dryland. They are severely affected by human activities and climate change. Dynamic changes in the drylands and within subtype (hyper-arid, arid, semi-arid, and dry sub-humid) areas, and the spatiotemporal characteristics in net primary productivity (NPP) of vegetation, are crucial for evaluating ecosystem functions and management strategies in China. This study defined drylands, and the area was determined based on the aridity index (AI). Our results demonstrated the drylands of China expanded from 5.8 million km(2) in 1980 to 6.6 million km(2) in 2020, with an average expansion rate of 0.019 x 10(6) km(2) (10 yr)(-1). These changes were driven mainly by the mean annual temperature (MAT) and solar radiation (Srad). Among the different subtypes of drylands, the arid and semi-arid areas expanded the fastest at 0.032 x 10(6) km(2) (10 yr)(-1), and the main driving factor was MAT. However, the hyper-arid area decreased in size at an average rate of 0.050 x 10(6) km(2) (10 yr)(-1), and the main driving factor was mean annual precipitation (MAP). Net primary productivity (NPP) of total vegetation and subtypes increased over 20 years. The NPP of the whole dryland increased at a rate of 10.78 g C m(-2) yr(-1), which was dominated by the rapid growth of NPP (5.15 g C m(-2) yr(-1)) in dry sub-humid areas. The NPP of four vegetation types (desert, grassland, forest, and cropland) increased (19.14 Tg C yr(-1)); the NPP in the forest and cropland increased considerably, while that in the grassland and desert increased slightly. The drylands in China might further expand with global warming because the MAT strongly affects the changes in dryland areas. With the development of eco-environmental protection projects (afforestation, construction of desert highway protection forest, etc.) and western region development and construction in China, the contribution of forest and cropland to the total NPP of all vegetation will increase.
英文关键词	Dryland meteorological elements NPP driving factors vegetation types
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000986190000001
WOS关键词	SEMIARID CLIMATE-CHANGE ; TEMPERATURE-CHANGES ; NORTHWEST CHINA ; VEGETATION NPP ; ECOSYSTEMS ; DROUGHT ; TRENDS ; IMPACT ; EXTENT ; RIVER
WOS类目	Geosciences, Multidisciplinary ; Multidisciplinary Sciences
WOS研究方向	Geology ; Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397253
推荐引用方式 GB/T 7714	Zhang, Shihang,Chen, Yusen,Guo, Hao,et al. Changes in dryland areas and net primary productivity in China from 1980 to 2020[J],2023,132(2).
APA	Zhang, Shihang.,Chen, Yusen.,Guo, Hao.,Lu, Yongxing.,Guo, Xing.,...&Zhang, Yuanming.(2023).Changes in dryland areas and net primary productivity in China from 1980 to 2020.JOURNAL OF EARTH SYSTEM SCIENCE,132(2).
MLA	Zhang, Shihang,et al."Changes in dryland areas and net primary productivity in China from 1980 to 2020".JOURNAL OF EARTH SYSTEM SCIENCE 132.2(2023).