Disentangling the effects of vapor pressure deficit on northern terrestrial vegetation productivity
Artikel i vetenskaplig tidskrift, 2023

The impact of atmospheric vapor pressure deficit (VPD) on plant photosynthesis has long been acknowledged, but large interactions with air temperature (T) and soil moisture (SM) still hinder a complete understanding of the influence of VPD on vegetation production across various climate zones. Here, we found a diverging response of productivity to VPD in the Northern Hemisphere by excluding interactive effects of VPD with T and SM. The interactions between VPD and T/SM not only offset the potential positive impact of warming on vegetation productivity but also amplifies the negative effect of soil drying. Notably, for high-latitude ecosystems, there occurs a pronounced shift in vegetation productivity's response to VPD during the growing season when VPD surpasses a threshold of 3.5 to 4.0 hectopascals. These results yield previously unknown insights into the role of VPD in terrestrial ecosystems and enhance our comprehension of the terrestrial carbon cycle's response to global warming.
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Publicerad i

Science advances

2375-2548 (eISSN)

Vol. 9 Nummer/häfte 32 s. eadf3166-

Forskningsprojekt

ModElling the Regional and Global Earth system (MERGE)

Lunds universitet (9945095), 2010-01-01 -- .

Kategorisering

Ämneskategorier (SSIF 2011)

Meteorologi och atmosfärforskning

Ekologi

Skogsvetenskap

Klimatforskning

Identifikatorer

DOI

10.1126/sciadv.adf3166

PubMed

37556542

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Senast uppdaterat

2024-10-11