The use of pre-dawn leaf water potential and MODIS LAI to explore seasonal trends in the phenology of Australian and southern African woodlands and savannas

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dc.contributor.author Palmer, Anthony en_US
dc.contributor.author Fuentes, Sigfredo en_US
dc.contributor.author Taylor, Daniel en_US
dc.contributor.author Macinnis-Ng, Catriona en_US
dc.contributor.author Zeppel, Melanie en_US
dc.contributor.author Yunusa, Isa en_US
dc.contributor.author February, Edmund en_US
dc.contributor.author Eamus, Derek en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:44:27Z
dc.date.available 2010-05-28T09:44:27Z
dc.date.issued 2008 en_US
dc.identifier 2007005395 en_US
dc.identifier.citation Palmer Anthony et al. 2008, 'The use of pre-dawn leaf water potential and MODIS LAI to explore seasonal trends in the phenology of Australian and southern African woodlands and savannas', CSIRO, vol. 56, no. 7, pp. 557-563. en_US
dc.identifier.issn 0067-1924 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8618
dc.description.abstract Trends in global soil moisture are needed to inform models of soil?plant?atmosphere interactions. Predawn leaf water potential (?pd), a surrogate for soil moisture and an index of plant water stress, has been routinely collected in Australian forests, woodlands and savannas, but the associated leaf area index (LAI) has seldom been available to enable the preparation of a ?pd on LAI relationship. Following an analysis of ?pd and MODIS LAI data from Australian forests, woodlands and savannas, we identified patterns in ?pd which provide an understanding of the role of soil-moisture status in controlling LAI. In the savanna of northern Australia, the MODIS LAI product had a basal value of 0.96 during the dry season as compared with a mean value of 2.5 for the wet season. The dry season value is equivalent to the LAI of the tree component and corresponds with ground-truthed LAI. ?pd is lowest (more negative) during the height of the dry season (late October) at -2.5 MPa, and highest (-0.1 MPa) during the wet season (early March). We present two models which predict ?pd from the MODIS LAI product. These may be useful surrogates for studying trends in soil moisture in highly seasonal climates and may contribute to climate change research. en_US
dc.language en_US
dc.publisher CSIRO en_US
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon http://dx.doi.org/10.1071/BT08079 en_US
dc.title The use of pre-dawn leaf water potential and MODIS LAI to explore seasonal trends in the phenology of Australian and southern African woodlands and savannas en_US
dc.parent Australian Journal Of Botany en_US
dc.journal.volume 56 en_US
dc.journal.number 7 en_US
dc.publocation Collingwood VIC, Australia en_US
dc.identifier.startpage 557 en_US
dc.identifier.endpage 563 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 050200 en_US
dc.personcode 995490 en_US
dc.personcode 997490 en_US
dc.personcode 040345 en_US
dc.personcode 980151 en_US
dc.personcode 034078 en_US
dc.personcode 030005 en_US
dc.personcode 0000046698 en_US
dc.personcode 000006 en_US
dc.percentage 100 en_US
dc.classification.name Environmental Science and Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.staffid 000006 en_US


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