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Research article - Peer-reviewed, 2021

Early growing season anomalies in vegetation activity determine the large-scale climate-vegetation coupling in Europe

Wu, Minchao; Vico, Giulia; Manzoni, Stefano; Cai, Zhanzhang; Bassiouni, Maoya; Tian, Feng; Zhang, Jie; Ye, Kunhui; Messori, Gabriele

Abstract

The climate-vegetation coupling exerts a strong control on terrestrial carbon budgets and will affect the future evolution of global climate under continued anthropogenic forcing. Nonetheless, the effects of climatic conditions on such coupling at specific times in the growing season remain poorly understood. We quantify the climate-vegetation coupling in Europe over 1982–2014 at multiple spatial and temporal scales, by decomposing sub-seasonal anomalies of vegetation greenness using a grid-wise definition of the growing season. We base our analysis on long-term vegetation indices (Normalized Difference Vegetation Index and two-band Enhanced Vegetation Index), growing conditions (including 2m temperature, downwards surface solar radiation, and root-zone soil moisture), and multiple teleconnection indices that reflect the large-scale climatic conditions over Europe. We find that the large-scale climate-vegetation coupling during the first two months of the growing season largely determines the full-year coupling. The North Atlantic Oscillation and Scandinavian Pattern phases one-to-two months before the start of the growing season are the dominant and contrasting drivers of the early growing season climate-vegetation coupling over large parts of boreal and temperate Europe. The East Atlantic Pattern several months in advance of the growing season exerts a strong control on the temperate belt and the Mediterranean region. The strong role of early growing season anomalies in vegetative activity within the growing season emphasizes the importance of a grid-wise definition of the growing season when studying the large-scale climate-vegetation coupling in Europe.

Keywords

carbon cycle; climate-vegetation coupling; early growing season; Europe; greenness anomalies; vegetation index

Published in

Journal of Geophysical Research: Biogeosciences
2021, volume: 126, number: 5, article number: e2020JG006167

Authors' information

Wu, Minchao
Uppsala University
Swedish University of Agricultural Sciences, Department of Crop Production Ecology
Manzoni, Stefano
Stockholm Univ
Cai, Zhanzhang
Lund University
Swedish University of Agricultural Sciences, Department of Crop Production Ecology
Tian, Feng
Wuhan University
Zhang, Jie
Uppsala University
Ye, Kunhui
Uppsala University
Messori, Gabriele
Uppsala University

UKÄ Subject classification

Ecology
Climate Research

Publication Identifiers

DOI: https://doi.org/10.1029/2020JG006167

URI (permanent link to this page)

https://res.slu.se/id/publ/112103