globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13562
论文题名:
Response of vegetation phenology to urbanization in the conterminous United States
作者: Li X.; Zhou Y.; Asrar G.R.; Mao J.; Li X.; Li W.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:7
起始页码: 2818
结束页码: 2830
语种: 英语
英文关键词: phenology response ; urban expansion ; urban size ; urbanization ; vegetation type
英文摘要: The influence of urbanization on vegetation phenology is gaining considerable attention due to its implications for human health, cycling of carbon and other nutrients in Earth system. In this study, we examined the relationship between change in vegetation phenology and urban size, an indicator of urbanization, for the conterminous United States. We studied more than 4500 urban clusters of varying size to determine the impact of urbanization on plant phenology, with the aids of remotely sensed observations since 2003–2012. We found that phenology cycle (changes in vegetation greenness) in urban areas starts earlier (start of season, SOS) and ends later (end of season, EOS), resulting in a longer growing season length (GSL), when compared to the respective surrounding urban areas. The average difference of GSL between urban and rural areas over all vegetation types, considered in this study, is about 9 days. Also, the extended GSL in urban area is consistent among different climate zones in the United States, whereas their magnitudes are varying across regions. We found that a tenfold increase in urban size could result in an earlier SOS of about 1.3 days and a later EOS of around 2.4 days. As a result, the GSL could be extended by approximately 3.6 days with a range of 1.6–6.5 days for 25th ~ 75th quantiles, with a median value of about 2.1 days. For different vegetation types, the phenology response to urbanization, as defined by GSL, ranges from 1 to 4 days. The quantitative relationship between phenology and urbanization is of great use for developing improved models of vegetation phenology dynamics under future urbanization, and for developing change indicators to assess the impacts of urbanization on vegetation phenology. © 2016 John Wiley & Sons Ltd
资助项目: This study was supported by the NASA ROSES LULC Program ‘NNH11ZDA001N-LCLUC’ and the NASA ROSES INCA Program ‘NNH14ZDA001N-INCA’. We thank four anonymous reviewers for their valuable comments to improve this manuscript.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60896
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, United States; Pacific Northwest National Laboratory, Joint Global Change Research Institute, College Park, MD, United States; Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, United States; Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University, Beijing, China

Recommended Citation:
Li X.,Zhou Y.,Asrar G.R.,et al. Response of vegetation phenology to urbanization in the conterminous United States[J]. Global Change Biology,2017-01-01,23(7)
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