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Göteborgs universitets publikationer

Drought dominates the interannual variability in global terrestrial net primary production by controlling semi-arid ecosystems

Författare och institution:
L. Huang (-); B. He (-); Aifang Chen (Institutionen för geovetenskaper); H. Y. Wang (-); J. J. Liu (-); A. F. Lu (-); Z. Y. Chen (-)
Publicerad i:
Scientific Reports, 6
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Drought is a main driver of interannual variation in global terrestrial net primary production. However, how and to what extent drought impacts global NPP variability is unclear. Based on the multi-timescale drought index SPEI and a satellite-based annual global terrestrial NPP dataset, we observed a robust relationship between drought and NPP in both hemispheres. In the Northern Hemisphere, the annual NPP trend is driven by 19-month drought variation, whereas that in the Southern Hemisphere is driven by 16-month drought variation. Drought-dominated NPP, which mainly occurs in semi-arid ecosystems, explains 29% of the interannual variation in global NPP, despite its 16% contribution to total global NPP. More surprisingly, drought prone ecosystems in the Southern Hemisphere, which only account for 7% of the total global NPP, contribute to 33% of the interannual variation in global NPP. Our observations support the leading role of semi-arid ecosystems in interannual variability in global NPP and highlight the great impacts of long-term drought on the global carbon cycle.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap ->
carbon-cycle, responses, modis, vegetation, mortality, legacies, dataset, stress, models, plants
Postens nummer:
Posten skapad:
2016-05-17 13:39
Posten ändrad:
2016-05-17 13:40

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