A modified Jarvis model to improve the expressing of stomatalresponse in a beech forest

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F23%3A00574247" target="_blank" >RIV/67985874:_____/23:00574247 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/23:10469939

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/hyp.14955" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/hyp.14955</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/hyp.14955" target="_blank" >10.1002/hyp.14955</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A modified Jarvis model to improve the expressing of stomatalresponse in a beech forest

Popis výsledku v původním jazyce

The Jarvis-type model, which incorporates stress functions, is commonly used todescribe the physiological behaviour of stomatal response in various vegetation species.However, the model has been criticized for its empirically formulated multiplicative equa-tion, which may not accurately capture themutual impact of intercorrelated stress fac-tors, for example, vapour pressure deficit (VPD) and air temperature (Ta). This studyproposedamodifiedJarvismodel that introduces reduction factors in the stress func-tions of VPD andTato provide the description of canopy conductance. We used sapflow data from a beech forest in the mid-latitude region of Centre Europe to inverselyestimate the canopy conductance with optimized stress functions. Our findings revealthat two recommended parameterization strategies for general deciduous broadleaf for-est (DBF) significantly overestimated thetranspiration rate, with a maximum value of 2 mm/day on rainless days. This suggested that the beech forest exhibited a distinctstomatal response compared to the general DBF category. By applying boundary lineanalysis to fit the parameters, both the unmodified and modified Jarvis models providedbetter simulations of transpiration, with relatively high Nash-Sutcliffe Efficiency (NSE)values of 0.75 and 0.77, respectively. These results indicated that modelling transpirationcan be improved by refining the parameterization of canopy conductance, particularlyfor vegetation species with unique stomatal behaviours that deviated from the charac-teristics of their general vegetation type.The modified Jarvis model offers a more accu-rate description of canopy conductance andenhances the modelling of transpiration invegetated areas, especially under dry environment conditions with relatively high VPD.

Název v anglickém jazyce

A modified Jarvis model to improve the expressing of stomatalresponse in a beech forest

Popis výsledku anglicky

The Jarvis-type model, which incorporates stress functions, is commonly used todescribe the physiological behaviour of stomatal response in various vegetation species.However, the model has been criticized for its empirically formulated multiplicative equa-tion, which may not accurately capture themutual impact of intercorrelated stress fac-tors, for example, vapour pressure deficit (VPD) and air temperature (Ta). This studyproposedamodifiedJarvismodel that introduces reduction factors in the stress func-tions of VPD andTato provide the description of canopy conductance. We used sapflow data from a beech forest in the mid-latitude region of Centre Europe to inverselyestimate the canopy conductance with optimized stress functions. Our findings revealthat two recommended parameterization strategies for general deciduous broadleaf for-est (DBF) significantly overestimated thetranspiration rate, with a maximum value of 2 mm/day on rainless days. This suggested that the beech forest exhibited a distinctstomatal response compared to the general DBF category. By applying boundary lineanalysis to fit the parameters, both the unmodified and modified Jarvis models providedbetter simulations of transpiration, with relatively high Nash-Sutcliffe Efficiency (NSE)values of 0.75 and 0.77, respectively. These results indicated that modelling transpirationcan be improved by refining the parameterization of canopy conductance, particularlyfor vegetation species with unique stomatal behaviours that deviated from the charac-teristics of their general vegetation type.The modified Jarvis model offers a more accu-rate description of canopy conductance andenhances the modelling of transpiration invegetated areas, especially under dry environment conditions with relatively high VPD.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

<a href="/cs/project/GN22-20422O" target="_blank" >GN22-20422O: Úmrtnost stromů způsobená hmyzem při změně klimatu - dopady na hydrologii a geochemii napříč měřítky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Hydrological Processes

ISSN

0885-6087

e-ISSN

1099-1085

Svazek periodika

37

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

e14955

Kód UT WoS článku

001045143200001

EID výsledku v databázi Scopus

2-s2.0-85167512027