Declining precipitation frequency may drive earlier leaf senescence by intensifying drought stress and enhancing drought acclimation.

ABSTRACT: Precipitation is an important factor influencing the date of foliar senescence, which in turn affects carbon uptake of terrestrial ecosystems. However, the temporal patterns of precipitation frequency and its impact on foliar senescence date remain largely unknown. Using both long-term carbon flux data and satellite observations across the Northern Hemisphere, we show that, after excluding impacts from of temperature, radiation and total precipitation by partial correlation analysis, declining precipitation frequency may drive earlier foliar senescence date from 1982 to 2022. A decrease in precipitation frequency intensifies drought stress by reducing root-zone soil moisture and increasing atmospheric dryness, and limit the photosynthesis necessary for sustained growth. The enhanced drough

SUBMITTER: Zhang X 

PROVIDER: S-EPMC11750966 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature