Changes of remote sensing vegetation phenology in Beijing-Tianjin-Hebei region under the background of urbanization
View abstract on PubMed
Summary
This summary is machine-generated.Urbanization significantly impacts vegetation phenology. Increased impervious surfaces lead to earlier growing seasons, later ends, and extended lengths, especially in farmland, influencing urban-rural ecological differences.
Area Of Science
- Environmental Science
- Remote Sensing
- Ecology
Background
- Urbanization presents challenges like heat islands and air pollution, affecting urban vegetation phenology.
- Understanding these impacts is crucial for urban planning and ecological management.
Purpose Of The Study
- To analyze vegetation phenology dynamics along an urbanization gradient in the Beijing-Tianjin-Hebei region.
- To investigate the relationship between impervious surface percentage, land surface temperature, and vegetation phenological shifts.
Main Methods
- Reconstructed time series of MOD13Q1 enhanced vegetation index data (2002-2021).
- Extracted vegetation phenology indices (SOS, EOS, GSL) using the dynamic threshold method.
- Correlated phenological changes with impervious surface percentage and land surface temperature.
Main Results
- Growing season length (GSL) significantly extended across Beijing-Tianjin-Hebei due to earlier start (SOS) and later end (EOS).
- Impervious surface percentage increases correlated with advanced SOS, delayed EOS, and extended GSL.
- Land surface temperature influenced phenology, with complex advance/delay patterns for SOS and EOS.
Conclusions
- Urbanization, particularly increased impervious surfaces, drives significant shifts in vegetation phenology.
- Surface temperature is a key factor mediating urban-rural phenological differences.
- Findings highlight the need for considering ecological impacts in urban development strategies.
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