Xiaolu's talk at the American Geophysical Union fall meeting 2024 in Washington, D.C.

Xiaolu’s abstract: Relationships between spring and fall phenology of terrestrial plants vary across regions and change over time. Spring phenology can influence land-atmosphere interactions throughout the growing season, which in turn affects fall phenology. In this study, we investigate how growing season land-atmosphere coupling relates to and modulates the relationships between spring and fall phenology. We utilized both ground observations and satellite remote sensing products. The relationships between spring and fall phenology differ across regions, reflecting the patterns of land-atmosphere coupling strength. However, the controlling factors also vary throughout the growing season and from year to year in regions such as Eastern US and Southeastern China where the relative importance of energy versus soil moisture in controlling land-atmosphere coupling changes, further altering fall phenology response. Variations in coupling strength can alter the spring-fall relationship at both landscape and species levels. We will also explore potential pathways for this relationship. Understanding the connection between plant phenology and growing season land-atmosphere interactions is crucial, as phenology influences both biogeochemical and biogeophysical processes at the land surface and can have large-scale impacts on the climate system through atmospheric circulations.