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Verlagsausgabe
DOI: 10.5445/IR/1000083775
Veröffentlicht am 25.06.2018

Asymmetric responses of primary productivity to altered precipitation simulated by ecosystem models across three long-term grassland sites

Wu, D.; Ciais, P.; Viovy, N.; Knapp, A. K.; Wilcox, K.; Bahn, M.; Smith, M. D.; Vicca, S.; Fatichi, S.; Zscheischler, J.; He, Y.; Li, X.; Ito, A.; Arneth, A.; Harper, A.; Ukkola, A.; Paschalis, A.; Poulter, B.; Peng, C.; Ricciuto, D.; ... mehr

Abstract:
Field measurements of aboveground net primary productivity (ANPP) in temperate grasslands suggest that both positive and negative asymmetric responses to changes in precipitation (P) may occur. Under normal range of precipitation variability, wet years typically result in ANPP gains being larger than ANPP declines in dry years (positive asymmetry), whereas increases in ANPP are lower in magnitude in extreme wet years compared to reductions during extreme drought (negative asymmetry). Whether the current generation of ecosystem models with a coupled carbon–water system in grasslands are capable of simulating these asymmetric ANPP responses is an unresolved question. In this study, we evaluated the simulated responses of temperate grassland primary productivity to scenarios of altered precipitation with 14 ecosystem models at three sites: Shortgrass steppe (SGS), Konza Prairie (KNZ) and Stubai Valley meadow (STU), spanning a rainfall gradient from dry to moist. We found that (1) the spatial slopes derived from modeled primary productivity and precipitation across sites were steeper than the temporal slopes obtained from inter-annual v ... mehr


Zugehörige Institution(en) am KIT Institut für Geographie und Geoökologie (IFGG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1726-4170, 1726-4189
URN: urn:nbn:de:swb:90-837752
KITopen ID: 1000083775
Erschienen in Biogeosciences
Band 15
Heft 11
Seiten 3421-3437
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