?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F19963%2F&rft.title=An+Investigation+of+Interactions+between+Plants+and+Water%2C+Energy+and+Carbon+Budgets+in+the+Soil-Plant-Atmosphere+Continuum&rft.creator=Luo%2C+Xiangyu&rft.description=Exchange+of+energy+and+substance+(water%2C+carbon+dioxide%2C+etc.)+between+land+surface+and+atmosphere+has+a+significant+impact+on+climate.+Considerable+part+of+this+exchange+occurs+through+the+soil-plant-atmosphere+continuum+(SPAC)+where+plants+play+an+important+role.+Therefore+functions+of+plants+in+water%2C+energy+and+carbon+cycles+of+the+SPAC+need+to+be+extensively+studied.+%0D%0A%0D%0AWhen+dry+climatic+conditions+appear%2C+plants+can+cope+with+the+adverse+circumstances+by+taking+advantage+of+some+biological+or+hydrological+processes.+In+this+study%2C+the+Three-Layer+Variable+Infiltration+Capacity+(VIC-3L)+land+surface+model+is+extended+to+include+some+important+biological+or+hydrological+processes+under+water-limited+climatic+conditions%3A+(1)+movement+of+soil+water+from+wet+to+dry+regions+through+hydraulic+redistribution+(HR)%3B+(2)+groundwater+dynamics%3B+(3)+plant+water+storage%3B+and+(4)+photosynthetic+process.+The+extended+VIC-3L+model+(referred+to+as+VIC%2B+model)+is+evaluated+with+an+analytical+solution+under+simple+conditions+and+with+observed+data+at+two+AmeriFlux+sites.+Scenario+simulations+demonstrate+that%3A+(1)+HR+has+significant+impacts+on+water%2C+energy+and+carbon+budgets+during+the+dry+season%3B+(2)+Rise+of+groundwater+table%2C+increase+of+root+depth%2C+HR%2C+and+plant+water+storage+can+increase+dry-season+latent+heat+flux%3B+(3)+Plant+water+storage+can+weaken+the+intensity+of+upward+HR%3B+(4)+Frozen+soil+can+restrict+downward+HR+in+the+wet+winter+and+reduce+the+soil+water+reserves+for+the+dry+season.%0D%0A%0D%0AGroundwater+can+have+significant+impacts+on+the+interactions+between+land+surface+and+atmosphere+by+way+of+mechanisms+such+as+influencing+plant+transpiration.+The+VIC%2B+model+is+used+to+conduct+numerical+experiments+to+study+impacts+of+groundwater+on+transpiration.+The+relationship+between+transpiration+and+groundwater+dynamics%2C+and+the+related+subsurface+processes+under+various+conditions+are+revealed+and+analyzed+through+results+of+numerical+experiments.%0D%0A%0D%0AIn+order+to+predict+interactions+between+land+surface+and+atmosphere+in+the+future%2C+vegetation+needs+to+be+represented+dynamically+in+modeling+studies.+To+this+end%2C+the+CASACNP+biogeochemical+model+has+been+coupled+with+the+VIC%2B+model.+This+coupled+model+is+used+to+conduct+scenario+simulations+to+demonstrate+impacts+of+vegetation+on+water+and+energy+cycles+when+dynamic+growth+of+vegetation+is+represented.&rft.date=2014-03-13&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F19963%2F1%2Fluox_etdPitt2013.pdf&rft.identifier=++Luo%2C+Xiangyu++(2014)+An+Investigation+of+Interactions+between+Plants+and+Water%2C+Energy+and+Carbon+Budgets+in+the+Soil-Plant-Atmosphere+Continuum.++Doctoral+Dissertation%2C+University+of+Pittsburgh.++++(Unpublished)++