Lag Analysis of Vegetation NDVI and Precipitation in Liaoning Province
Xinyu Bi, Xiaojing Liu
Available Online September 2019.
- https://doi.org/10.2991/wrarm-19.2019.16How to use a DOI?
- NDVI; precipitation; temperature; hysteresis Analysis
- Vegetation growth is a complex and slow process. Not only was it affected by the precipitation at that time, but also the accumulation of precipitation in the early stage played a certain role in its growth. That is, vegetation growth lags behind precipitation. Based on SPOT/VEGETATION ten-day NDVI data and meteorological station data from 1998 to 2013. The dynamic changes of NDVI of vegetation in Liaoning Province and the lagging relationship between NDVI and precipitation were analyzed when the effect of temperature on vegetation was removed. Revealing the influence of temperature on the lag relationship between NDVI and precipitation. The results show : (1) The overall trend of NDVI change in each site is remarkably consistent and the dynamic change law is obvious. (2) When the temperature effect is eliminated and the temperature effect is not eliminated. In May and June, the lagging days of vegetation on precipitation remained unchanged, all of which were 90 days. The number of days lagging in July, August and September has changed, July was 60 days and 70 days, August was 10 days and 90 days, September was 20 days and 90 days. It shows that temperature has an effect on the lag of vegetation on precipitation. The results can provide theoretical basis for regional drought prediction.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Xinyu Bi AU - Xiaojing Liu PY - 2019/09 DA - 2019/09 TI - Lag Analysis of Vegetation NDVI and Precipitation in Liaoning Province BT - Proceedings of the Sixth Symposium of Risk Analysis and Risk Management in Western China (WRARM 2019) PB - Atlantis Press SP - 84 EP - 87 SN - 1951-6851 UR - https://doi.org/10.2991/wrarm-19.2019.16 DO - https://doi.org/10.2991/wrarm-19.2019.16 ID - Bi2019/09 ER -