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Sökning: WFRF:(Trudinger Cathy M.) > (2018) > A new version of th...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00006002naa a2200397 4500
001oai:lup.lub.lu.se:139b0cb2-6bed-410a-801e-552032529e14
003SwePub
008180817s2018 | |||||||||||000 ||eng|
0247 a https://lup.lub.lu.se/record/139b0cb2-6bed-410a-801e-552032529e142 URI
0247 a https://doi.org/10.5194/gmd-11-2995-20182 DOI
040 a (SwePub)lu
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Haverd, Vanessau CSIRO Oceans and Atmosphere, Victoria4 aut
2451 0a A new version of the CABLE land surface model (Subversion revision r4601) incorporating land use and land cover change, woody vegetation demography, and a novel optimisation-based approach to plant coordination of photosynthesis
264 c 2018-07-27
264 1b Copernicus GmbH,c 2018
300 a 32 s.
520 a The Community Atmosphere-Biosphere Land Exchange model (CABLE) is a land surface model (LSM) that can be applied stand-alone and provides the land surface-atmosphere exchange within the Australian Community Climate and Earth System Simulator (ACCESS). We describe new developments that extend the applicability of CABLE for regional and global carbon-climate simulations, accounting for vegetation responses to biophysical and anthropogenic forcings. A land use and land cover change module driven by gross land use transitions and wood harvest area was implemented, tailored to the needs of the Coupled Model Intercomparison Project 6 (CMIP6). Novel aspects include the treatment of secondary woody vegetation, which benefits from a tight coupling between the land use module and the Population Orders Physiology (POP) module for woody demography and disturbance-mediated landscape heterogeneity. Land use transitions and harvest associated with secondary forest tiles modify the annually resolved patch age distribution within secondary vegetated tiles, in turn affecting biomass accumulation and turnover rates and hence the magnitude of the secondary forest sink. Additionally, we implemented a novel approach to constrain modelled GPP consistent with the coordination hypothesis and predicted by evolutionary theory, which suggests that electron-transport- and Rubisco-limited rates adjust seasonally and across biomes to be co-limiting. We show that the default prior assumption - common to CABLE and other LSMs - of a fixed ratio of electron transport to carboxylation capacity at standard temperature (Jmax,0/Vcmax,0) is at odds with this hypothesis; we implement an alternative algorithm for dynamic optimisation of this ratio such that coordination is achieved as an outcome of fitness maximisation. The results have significant implications for the magnitude of the simulated CO2 fertilisation effect on photosynthesis in comparison to alternative estimates and observational proxies. These new developments enhance CABLE's capability for use within an Earth system model and in stand-alone applications to attribute trends and variability in the terrestrial carbon cycle to regions, processes and drivers. Model evaluation shows that the new model version satisfies several key observational constraints: (i) trend and interannual variations in the global land carbon sink, including sensitivities of interannual variations to global precipitation and temperature anomalies; (ii) centennial trends in global GPP; (iii) coordination of Rubisco-limited and electron-transport-limited photosynthesis; (iv) spatial distributions of global ET, GPP, biomass and soil carbon; and (v) age-dependent rates of biomass accumulation in boreal, temperate and tropical secondary forests. CABLE simulations agree with recent independent assessments of the global land-atmosphere flux partition that use a combination of atmospheric inversions and bottom-up constraints. In particular, there is agreement that the strong CO2-driven sink in the tropics is largely cancelled by net deforestation and forest degradation emissions, leaving the Northern Hemisphere (NH) extratropics as the dominant contributor to the net land sink.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Naturgeografi0 (SwePub)105072 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Physical Geography0 (SwePub)105072 hsv//eng
7001 a Smith, Benjaminu Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,MERGE: ModElling the Regional and Global Earth system,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science,CSIRO Oceans and Atmosphere, Victoria4 aut0 (Swepub:lu)ple-bsm
7001 a Nieradzik, Larsu Lund University,Lunds universitet,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Centre for Environmental and Climate Science (CEC),Faculty of Science4 aut0 (Swepub:lu)nate-lni
7001 a Briggs, Peter R.u CSIRO Oceans and Atmosphere, Victoria4 aut
7001 a Woodgate, Williamu CSIRO Land & Water Flagship4 aut
7001 a Trudinger, Cathy M.u CSIRO Oceans and Atmosphere, Victoria4 aut
7001 a Canadell, Josep G.u CSIRO Oceans and Atmosphere, Victoria4 aut
7001 a Cuntz, Matthiasu University of Lorraine4 aut
7102 a CSIRO Oceans and Atmosphere, Victoriab BECC: Biodiversity and Ecosystem services in a Changing Climate4 org
7730 t Geoscientific Model Developmentd : Copernicus GmbHg 11:7, s. 2995-3026q 11:7<2995-3026x 1991-959Xx 1991-9603
8564 u http://dx.doi.org/10.5194/gmd-11-2995-2018x freey FULLTEXT
8564 u https://gmd.copernicus.org/articles/11/2995/2018/gmd-11-2995-2018.pdf
8564 8u https://lup.lub.lu.se/record/139b0cb2-6bed-410a-801e-552032529e14
8564 8u https://doi.org/10.5194/gmd-11-2995-2018

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