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Standardized sensitivity of GPP to Ta, VPD, SWC and PPFD during the summers of 2018 and 2016 for different vegetation types in Group 1 (δSWC ≤ −10%). Error bars represent ±1 standard error. ENF, evergreen needle-leaved forests; DBF, broadleaved deciduous forests; MF, mixed forests; GRA, grasslands; SHRUB, shrubland; WET, wetland. (Online version in colour.)
