Climate Change Data Portal
DOI | 10.1016/j.catena.2019.04.027 |
Relative importance of climate change and human activities for vegetation changes on China's silk road economic belt over multiple timescales | |
Qi, Xiangzhen; Jia, Junhe; Liu, Huiyu1; Lin, Zhenshan | |
发表日期 | 2019 |
ISSN | 0341-8162 |
EISSN | 1872-6887 |
卷号 | 180页码:224-237 |
英文摘要 | Ecological issues of China's Silk Road Economic Belt are receiving increasing attention. It is necessary to monitor vegetation changes in the Belt and explore their relationship with climate changes and human activities to ensure sustainable regional socioeconomic development. However, there is no adequate understanding of the relative importance of climate changes and human activities on vegetation over multiple timescales. In this study, ensemble empirical mode decomposition (EEMD) and residual trends (RESTREND) methods were used to establish the relative importance over multiple timescales. (1) The dominant timescales of vegetation changes have obvious spatial heterogeneity, which was affected by vegetation types and elevation. Grassland in high altitude areas, needleleaf forest, and shrubland were characterized by 3-year oscillations. Low-altitude areas mainly covered by cropland were characterized by long-term trends. (2) Climate types mainly affected the relationship between vegetation and climate changes at short timescales, while vegetation types, elevation, landforms affected the relationship over each timescale. Over the 3-year timescale, temperature and precipitation had a negative and a positive relationship respectively with vegetation changes in semi-arid and arid regions, but a positive relationship and a negative relationship respectively in semi-humid and humid regions. As the timescale widened, temperature had a positive relationship in all areas, except for needleleaf forest, and precipitation had a positive relationship except in high-latitude areas dominated by alpine meadow and in karst areas. (3) Vegetation changes were dominated by human activities at 3- and 6-year timescales but by climate changes in the long-term trend. However, when considering the total effects of these three timescales, climate changes dominated the overall changes of vegetation, while human activities also played an important role in vegetation reduction and insignificant changes. Vegetation changes were influenced by cross-scale climate changes. This study showed that multiple timescale analysis could deepen our understanding of the roles of climate and human activities on vegetation changes. |
WOS研究方向 | Geology ; Agriculture ; Water Resources |
来源期刊 | CATENA
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/102619 |
作者单位 | 1.Nanjing Normal Univ, State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Jiangsu, Peoples R China; 2.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Nanjing 210023, Jiangsu, Peoples R China; 3.Nanjing Normal Univ, Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Jiangsu, Peoples R China; 4.Nanjing Normal Univ, Coll Geog Sci, Nanjing 210023, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Qi, Xiangzhen,Jia, Junhe,Liu, Huiyu,et al. Relative importance of climate change and human activities for vegetation changes on China's silk road economic belt over multiple timescales[J],2019,180:224-237. |
APA | Qi, Xiangzhen,Jia, Junhe,Liu, Huiyu,&Lin, Zhenshan.(2019).Relative importance of climate change and human activities for vegetation changes on China's silk road economic belt over multiple timescales.CATENA,180,224-237. |
MLA | Qi, Xiangzhen,et al."Relative importance of climate change and human activities for vegetation changes on China's silk road economic belt over multiple timescales".CATENA 180(2019):224-237. |
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