The seasonal phenology of vegetation plays an important role in the global carbon cycle and ecosystem productivity. In urban environments, vegetation phenology is also important because of its influence on public health (e.g., allergies), and energy demand (e.g. cooling effects). Vegetation index derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) is widely used for mapping phenology indicators. The advent of solar-induced chlorophyll fluorescence (SIF) data provides a new perspective to retrieve the seasonal rhythm of vegetation dynamics from the Photosynthesis process. However, the difference in derived phenology indicators from these two data sources is still unclear.
Results/Conclusions
In this study, we mapped phenology indicators from the MODIS and SIF data and explored their difference along with the urban-rural profile. We found the SIF-derived phenology indicator is earlier than the result from MODIS, although overall their spatial patterns are similar. This result is insightful in understanding the mechanism of vegetation phenology.