[1]YANG Guang,SONG Ge,WEI Zhenfeng,et al.Characteristics of Vegetation Phenology in Northwest China Based on Sequential Vegetation Index[J].Research of Soil and Water Conservation,2015,22(06):213-218.
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Characteristics of Vegetation Phenology in Northwest China Based on Sequential Vegetation Index
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 06
Page number:
213-218
Column:
Public date:
2015-12-28
- Title:
- Characteristics of Vegetation Phenology in Northwest China Based on Sequential Vegetation Index
- Keywords:
- northwest China; vegetation phenology; start of growth(SOG); end of growth (EOG); length of growth (LOG)
- CLC:
- Q948
- DOI:
- -
- Abstract:
- Based on 10-day data of the SPOT VEGETATION from 1999 to 2010, using HANTS method to smooth the original data and convert them into daily data throughout Fourier interpolation method, we investigated the space-time characteristics of vegetation phenology in the northwest region of China. The results are shown as follows. (1) Below the altitude of 2 000 meters, vegetation type was given priority to agricultural vegetation and was greatly influenced by human factors. The start of growth (SOG) was relatively early. The end of growth (EOG) appeared delay. The length of growth (LOG) extended, and descended from southeast to the northwest areas. In the high altitude areas, the SOG appeared delay. EOG appeared in advance and the trend of LOG was shortened. (2) From 1999 to 2010, the SOG appeared in advance, EOG delayed and the LOG extended in the eastern area. The change of phonology in western area was contrary to that of the eastern area for many years. On the one hand, the altitude rose from Shaanxi to Qinghai. The temperature gradually decreased and the vegetation phenology changed. On the other hand, agricultural areas focused on Shaanxi and the grass grew in most regions of Qinghai. The main vegetation in Qinghai is grass, and the agricultural crop (wheat) phenology period was relatively long in that area.
- References:
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1900-01-01