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Climate change: vegetation and phenological phase dynamics

Authors :
Yang Li
Yaochen Qin
Ziwu Pan
Liqun Ma
Source :
International Journal of Climate Change Strategies and Management. 12:495-509
Publication Year :
2020
Publisher :
Emerald, 2020.

Abstract

Purpose The ecological environment of the Loess Plateau, China, is extremely fragile under the context of global warming. Over the past two decades, the vegetation of the Loess Plateau has undergone great changes. This paper aims to clarify the response mechanisms of vegetation to climate change, to provide support for the restoration and environmental treatment of vegetation on the Loess Plateau. Design/methodology/approach The Savitsky–Golay (S-G) filtering algorithm was used to reconstruct time series of moderate resolution imaging spectroradiometer (MODIS) 13A2 data. Combined with trend analysis and partial correlation analysis, the influence of climate change on the phenology and enhanced vegetation index (EVI) during the growing season was described. Findings The S-G filtering algorithm is suitable for EVI reconstruction of the Loess Plateau. The date of start of growing season was found to gradually later along the Southeast–Northwest direction, whereas the date of the end of the growing season showed the opposite pattern and the length of the growing season gradually shortened. Vegetation EVI values decreased gradually from Southeast to Northwest. Vegetation changed significantly and showed clear differentiation according to different topographic factors. Vegetation correlated positively with precipitation from April to July and with temperature from August to November. Originality/value This study provides technical support for ecological environmental assessment, restoration of regional vegetation coverage and environmental governance of the Loess Plateau over the past two decades. It also provides theoretical support for the prediction model of vegetation phenology changes based on remote sensing data.

Details

ISSN :
17568692
Volume :
12
Database :
OpenAIRE
Journal :
International Journal of Climate Change Strategies and Management
Accession number :
edsair.doi...........a8799909246a0f8c33a8f795f7cd35ef
Full Text :
https://doi.org/10.1108/ijccsm-06-2019-0037