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dc.contributor.author
Haynes, Katherine D.
dc.contributor.author
Baker, Ian T.
dc.contributor.author
Denning, A. Scott
dc.contributor.author
Wolf, Sebastian
dc.contributor.author
Wohlfahrt, Georg
dc.contributor.author
Kiely, Gerard
dc.contributor.author
Minaya, Renee C.
dc.contributor.author
Haynes, John M.
dc.date.accessioned
2020-02-14T17:48:44Z
dc.date.available
2019-12-06T23:53:45Z
dc.date.available
2019-12-09T08:08:54Z
dc.date.available
2020-02-14T17:48:44Z
dc.date.issued
2019-12
dc.identifier.issn
1942-2466
dc.identifier.other
10.1029/2018ms001541
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/383556
dc.identifier.doi
10.3929/ethz-b-000383556
dc.description.abstract
Grasslands are one of the most widely distributed and abundant vegetation types globally, and land surface models struggle to accurately simulate grassland carbon dioxide, energy, and water fluxes. Here we hypothesize that this is due to land surface models having difficulties in reproducing grassland phenology, in particular in response to the seasonal and interannual variability of precipitation. Using leaf area index (LAI), net primary productivity, and flux data at 55 sites spanning climate zones, the aim of this study is to evaluate a novel prognostic phenology model (Simple Biosphere Model, SiB4) while simultaneously illustrating grassland relationships across precipitation gradients. Evaluating from 2000 to 2014, SiB4 predicts daily LAI, carbon, and energy fluxes with root‐mean‐square errors < 15% and individual biases <10%; however, not including management likely reduces its performance. Grassland mean annual LAI increases linearly with mean annual precipitation, with both SiB4 and the Moderate Resolution Imaging Spectroradiometer (MODIS) showing a 0.13 increase in LAI per 100‐mm increase in precipitation. Both gross primary production and ecosystem respiration increase with growing season length by ∼8.5 g C m−2 per day, with SiB4 and Fluxnet estimates within 18%. Despite differences in mean annual precipitation and growing season length, all grassland sites shift to seasonal carbon sinks one month prior to peak uptake. During a U.S. drought, MODIS and SiB4 had nearly identical LAI responses, and the LAI change due to drought was less than the LAI change across the precipitation gradient, indicating that grassland drought response is not as strong as the overlying climate response.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Grassland ecology
en_US
dc.subject
Terrestrial carbon cycle
en_US
dc.subject
Prognostic phenology
en_US
dc.subject
Land surface model
en_US
dc.title
Representing grasslands using dynamic prognostic phenology based on biological growth stages: Part 2. Carbon cycling
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2019-12-05
ethz.journal.title
Journal of Advances in Modeling Earth Systems
ethz.journal.volume
11
en_US
ethz.journal.issue
12
en_US
ethz.pages.start
4440
en_US
ethz.pages.end
4465
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Farm-scale Methane Fluxes (FasMeF)
en_US
ethz.grant
Robust models for assessing the effectiveness of technologies and managements to reduce N2O emissions from grazed pastures (Models4Pastures)
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Hoboken, NJ
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02722 - Institut für Terrestrische Oekosysteme / Institute of Terrestrial Ecosystems::03798 - Kirchner, James W. / Kirchner, James W.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02722 - Institut für Terrestrische Oekosysteme / Institute of Terrestrial Ecosystems::03798 - Kirchner, James W. / Kirchner, James W.
en_US
ethz.grant.agreementno
129866
ethz.grant.agreementno
154245
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.grant.program
FACCE-JPI
ethz.date.deposited
2019-12-06T23:53:58Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-02-14T17:48:55Z
ethz.rosetta.lastUpdated
2021-02-15T08:04:51Z
ethz.rosetta.versionExported
true
ethz.COinS
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