Global decadal variability of plant carbon isotope discrimination and its link to gross primary production.

Glob Chang Biol · 2022 · PMC9298043 · PMID 34626040

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a negative trendno p-value reported

While Δ 13 C in 95 out of 151 sites (63%) stayed nearly constant over 1979–2012, 29 sites showed a significant increasing trend (average 0.034 ± 0.006‰ year −1 ) and 27 depicted a negative trend (−0.037 ± 0.07‰ year −1 ).

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