SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Duran Rojas Carolina)
 

Sökning: WFRF:(Duran Rojas Carolina) > Improvement of mode...

  • Harper, Anna B.University of Exeter (författare)

Improvement of modeling plant responses to low soil moisture in JULESvn4.9 and evaluation against flux tower measurements

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • 2021-06-03
  • Copernicus GmbH,2021
  • 26 s.

Nummerbeteckningar

  • LIBRIS-ID:oai:lup.lub.lu.se:dbc4630d-65fb-4cc7-bb42-34000ade7fb9
  • https://lup.lub.lu.se/record/dbc4630d-65fb-4cc7-bb42-34000ade7fb9URI
  • https://doi.org/10.5194/gmd-14-3269-2021DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • Drought is predicted to increase in the future due to climate change, bringing with it myriad impacts on ecosystems. Plants respond to drier soils by reducing stomatal conductance in order to conserve water and avoid hydraulic damage. Despite the importance of plant drought responses for the global carbon cycle and local and regional climate feedbacks, land surface models are unable to capture observed plant responses to soil moisture stress. We assessed the impact of soil moisture stress on simulated gross primary productivity (GPP) and latent energy flux (LE) in the Joint UK Land Environment Simulator (JULES) vn4.9 on seasonal and annual timescales and evaluated 10 different representations of soil moisture stress in the model. For the default configuration, GPP was more realistic in temperate biome sites than in the tropics or high-latitude (cold-region) sites, while LE was best simulated in temperate and high-latitude (cold) sites. Errors that were not due to soil moisture stress, possibly linked to phenology, contributed to model biases for GPP in tropical savanna and deciduous forest sites. We found that three alternative approaches to calculating soil moisture stress produced more realistic results than the default parameterization for most biomes and climates. All of these involved increasing the number of soil layers from 4 to 14 and the soil depth from 3.0 to 10.8 m. In addition, we found improvements when soil matric potential replaced volumetric water content in the stress equation (the "soil14_psi" experiments), when the critical threshold value for inducing soil moisture stress was reduced ("soil14_p0"), and when plants were able to access soil moisture in deeper soil layers ("soil14_dr&z.ast;2"). For LE, the biases were highest in the default configuration in temperate mixed forests, with overestimation occurring during most of the year. At these sites, reducing soil moisture stress (with the new parameterizations mentioned above) increased LE and increased model biases but improved the simulated seasonal cycle and brought the monthly variance closer to the measured variance of LE. Further evaluation of the reason for the high bias in LE at many of the sites would enable improvements in both carbon and energy fluxes with new parameterizations for soil moisture stress. Increasing the soil depth and plant access to deep soil moisture improved many aspects of the simulations, and we recommend these settings in future work using JULES or as a general way to improve land surface carbon and water fluxes in other models. In addition, using soil matric potential presents the opportunity to include plant functional type-specific parameters to further improve modeled fluxes.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Williams, Karina E.Met Office,University of Exeter (författare)
  • Mcguire, Patrick C.University of Reading (författare)
  • Duran Rojas, Maria CarolinaUniversity of Exeter (författare)
  • Hemming, DebbieMet Office,University of Birmingham (författare)
  • Verhoef, AnneUniversity of Reading (författare)
  • Huntingford, ChrisCentre for Ecology & Hydrology, Wallingford (författare)
  • Rowland, LucyUniversity of Exeter (författare)
  • Marthews, TobyCentre for Ecology & Hydrology, Wallingford (författare)
  • Breder Eller, CleitonUniversity of Campinas (författare)
  • Mathison, CamillaMet Office (författare)
  • Nobrega, Rodolfo L.B.Imperial College London (författare)
  • Gedney, NicolaMet Office (författare)
  • Vidale, Pier LuigiUniversity of Reading (författare)
  • Otu-Larbi, FredLancaster University (författare)
  • Pandey, DivyaUniversity of York (författare)
  • Garrigues, SebastienEuropean Centre for Medium-range Weather Forecasts (författare)
  • Wright, AzinUniversity of Reading (författare)
  • Slevin, DarrenForest Research, Northern Research Station (författare)
  • De Kauwe, Martin G.University of New South Wales,Centre of Excellence for Climate Extremes (CLEX) (författare)
  • Blyth, EleanorCentre for Ecology & Hydrology, Wallingford (författare)
  • Ardo¨, JonasLund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)natg-jar (författare)
  • Black, AndrewUniversity of British Columbia (författare)
  • Bonal, DamienUniversity of Lorraine (författare)
  • Buchmann, NinaETH Zürich (författare)
  • Burban, BenoitAgricultural research for develompent (CIRAD),University Of Antilles (författare)
  • Fuchs, KathrinETH Zürich,Karlsruhe Institute of Technology (författare)
  • De Grandcourt, AgnèsAgricultural research for develompent (CIRAD) (författare)
  • Mammarella, IvanUniversity of Helsinki (författare)
  • Merbold, LutzInternational Livestock Research Institute Nairobi (författare)
  • Montagnani, LeonardoFree University of Bozen-Bolzano,Forest Services, Autonomous Province of Bolzano (författare)
  • Nouvellon, YannAgricultural research for develompent (CIRAD) (författare)
  • Restrepo-Coupe, NataliaUniversity of Arizona,University of Technology Sydney (författare)
  • Wohlfahrt, GeorgUniversity of Innsbruck (författare)
  • University of ExeterMet Office (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Geoscientific Model Development: Copernicus GmbH14:6, s. 3269-32941991-959X1991-9603

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy