000117508 001__ 117508
000117508 005__ 20181203021108.0
000117508 0247_ $$2doi$$a10.1029/2002GL015631
000117508 037__ $$aARTICLE
000117508 245__ $$aClimate and interannual variability of the atmosphere-biosphere 13CO2 flux
000117508 269__ $$a2003
000117508 260__ $$c2003
000117508 336__ $$aJournal Articles
000117508 520__ $$aWe present a bottom-up approach to simulate the terrestrial isotopic carbon variations using the Lund-Potsdam-Jena dynamic global vegetation model (LPJ-DGVM). LPJ is extended to include isotopic fractionation of C-13 at the leaf level during assimilation and includes a full isotopic terrestrial carbon cycle. The model thus allows a quantitative analysis of the net biosphere exchange of CO2 and (CO2)-C-13 with the atmosphere as a function of changes in climate, atmospheric CO2, and the isotope ratio of CO2. LPJ simulates a global mean isotopic fractionation of 17.7% at the leaf level with interannual variations of ca. 0.3%. Interannual variability in the net (CO2)-C-13 flux between atmosphere and terrestrial biosphere is of the order of 15 PgC% yr(-1). It is reduced to 4 PgC% yr(-1) if the leaf-level fractionation factor is held constant at the long term mean. Taking climate driven variable fractionation effects into account in double deconvolution studies we estimate that this could imply shifts of up to 0.8 PgC yr(-1) in the inferred partitioning between terrestrial and oceanic carbon sinks.
000117508 6531_ $$aTerrestrial biosphere
000117508 6531_ $$aco2
000117508 6531_ $$ac-13
000117508 6531_ $$a20th-century
000117508 700__ $$aScholze, M.
000117508 700__ $$0240033$$g176442$$aKaplan, J. O.
000117508 700__ $$aKnorr, W.
000117508 700__ $$aHeimann, M.
000117508 773__ $$j30$$tGeophysical Research Letters$$k2$$q1097
000117508 909C0 $$xU11021$$0252129$$pECOS
000117508 909C0 $$xU11903$$0252021$$pARVE
000117508 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:117508
000117508 937__ $$aECOS-ARTICLE-2008-105
000117508 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000117508 980__ $$aARTICLE