Volume 29, Issue 16 pp. 4543-4555
RESEARCH ARTICLE

Spring phenology rather than climate dominates the trends in peak of growing season in the Northern Hemisphere

Zhi Huang

Zhi Huang

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, China

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Lei Zhou

Corresponding Author

Lei Zhou

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, China

Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China

Correspondence

Lei Zhou and Yonggang Chi, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.

Email: zhoulei@zjnu.cn; chiyonggang@zjnu.cn

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Yonggang Chi

Corresponding Author

Yonggang Chi

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, China

Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China

Correspondence

Lei Zhou and Yonggang Chi, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.

Email: zhoulei@zjnu.cn; chiyonggang@zjnu.cn

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First published: 17 May 2023

Abstract

Shifts in plant phenology regulate ecosystem structure and function, which feeds back to the climate system. However, drivers for the peak of growing season (POS) in seasonal dynamics of terrestrial ecosystems remain unclear. Here, spatial–temporal patterns of POS dynamics were analyzed by solar-induced chlorophyll fluorescence (SIF) and vegetation index in the Northern Hemisphere over the past two decades from 2001 to 2020. Overall, a slow advanced POS was observed in the Northern Hemisphere, while a delayed POS distributed mainly in northeastern North America. Trends of POS were driven by the start of growing season (SOS) rather than pre-POS climate both at hemisphere and biome scale. The effect of SOS on the trends in POS was the strongest in shrublands while the weakest in evergreen broad-leaved forest. These findings highlight the crucial role of biological rhythms rather than climatic factors in exploring seasonal carbon dynamics and global carbon balance.

CONFLICT OF INTEREST STATEMENT

The authors declare no conflict of interest.

DATA AVAILABILITY STATEMENT

All data that support the findings of this study are available from Dryad at 10.5061/dryad.4j0zpc8hn.

Volume29, Issue16

August 2023

Pages 4543-4555

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.