XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/6: Agriculture, Ecosystems and Bio-Diversity]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: MONITORING SPATIAL PATTERNS OF VEGETATION PHENOLOGY IN AN AUSTRALIAN TROPICAL TRANSECT USING MODIS EVI Xuanlong Ma, Alfredo Huete, Qiang Yu, Kevin Davies, and Natalia Restrepo Coupe

Document type:: Multivolume work

Structure type:: Chapter

e Sudanese e Element zrammetrie 9 Monitoring nge Detec- ition, 2011 Landscape grammetric 56. |. Mapping Spatial In- zrammetric change de- ne of West iversity of nplementa- n the West- h from the ource Man- leo Galilei, 2). following JARMAP - yrtio ITA - i. GMFS is following AS Remote , University Osnabrück, n: Tyumen 1y, Tyumen ~ & Subsoil the German he Russian International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia MONITORING SPATIAL PATTERNS OF VEGETATION PHENOLOGY IN AN AUSTRALIAN TROPICAL TRANSECT USING MODIS EVI Xuanlong Ma?*^, Alfredo Huete^; Qiang Yu*^, Kevin Davies?, and Natalia Restrepo Coupe? * Plant Functional Biology and Climate Change Cluster, University of Technology, Sydney, Australia P Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China Commission VIIV6 KEY WORDS: NATT, tropical savannas, phenology, climate change, MODIS, EVI ABSTRACT: Phenology is receiving increasing interest in the area of climate change and vegetation adaptation to climate. The phenology of a landscape can be used as a key parameter in land surface models and dynamic global vegetation mod- els to more accurately simulate carbon, water and energy exchanges between land cover and atmosphere. However, the characterisation of phenology is lacking in tropical savannas which cover more than 30% of global land area, and are highly vulnerable to climate change. The objective of this study is to investigate the spatial pattern of vegetation phenology along the Northern Australia Tropical Transect (NATT) where the major biomes are wet and dry tropical savannas. For this analysis we used more than 11 years Moderate Resolution Imaging Spectroradiometer (MODIS) Enhanced Vegetation Index (EVI) product from 2000 to 2011. Eight phenological metrics were derived: Start of Sea- son (SOS), End of Season (EOS), Length of Season (LOS), Maximum EVI (MaxG), Minimum EVI (MinG), annual amplitude (AMP), large integral (LIG), and small integral (SIG) were generated for each year and each pixel. Our results showed there are significant spatial patterns and considerable interannual variations of vegetation phenology along the NATT study area. Generally speaking, vegetation growing season started and ended earlier in the north, and started and ended later in the south, resulting in a southward decrease of growing season length (LOS). Vegetation productivity, which was represented by annual integral EVI (LIG), showed a significant descending trend from the northern part of NATT to the southern part. Segmented regression analysis showed that there exists a distinguishable breakpoint along the latitudinal gradient, at least in terms of annual minimum EVI (EVI), which is located between 18.84°S to 20.04° S. 1 INTRODUCTION Phenology as a subject to study the life cycles of vegeta- tion and the interactions between vegetation and climate (White and Thornton, 1997) is receiving increasing in- terests in global change research. Vegetation phenology can be used as a key parameter in large scale ecosys- tem simulation models (Running and Hunt, 1993) and general circulation models (Sellers et al., 1996). At the same time, vegetation phenology is also an accurate in- dicator of influences by climate change on vegetation growth (Menzel et al., 2006). Phenological studies of vegetation traditionally utilised ground based techniques (Jeffree, 1960, Sparks and Jef- free, 2000), however, increasing number of studies utilise remote sensing to study vegetation phenology on a large scale (Schwartz, 1999, Zhang et al., 2003, Stóckli, 2004). Compared with field based cameras or visual inspection, space borne optical sensors such as MERIS (MEdium Resolution Imaging Spectrometer) and MODIS (Mod- erate Resolution Imaging Spectroradiometer) are able to provide daily measurements of variety biophysical and biochemical information of the earth's surface with moderate spatial resolution. * Corresponding address: Plant functional biology and cli- mate change cluster, University of Technology, Sydney, PO Box 123, Broadway, NSW, 2000, Australia, Tel: 461 2 9514 4084, Email: alfredo.huete @uts.edu.au However, till now most remote sensing phenology stud- ies focused on temperature and light limited systems (Beurs and Henebry, 2010), with few conducted on wa- ter limited systems (Brown and de Beurs, 2008), and rarely on tropical savannas. Tropical savannas are gen- erally defined as a biome with discrete tree stratum and continuous grassy ground layer (Frost et al., 1986), which covers one-sixth of the global land surface, and con- tributes approximately 3096 of the gross primary pro- ductivity (GPP) of all terrestrial ecosystems (House and Hall, 2001). Tropical savannas are also considered par- ticularly vulnerable to climate change (Canadell et al., 2003). Despite the importance of tropical savannas, stud- ies of its vegetation phenology are lacking regardless of the methods, thus restricting our capability to under- stand the impact of possible climate change scenarios on tropical savannas ecosystems. Previous studies showed that a biogeographical bound- ary existed in the NATT area, which may distributed around 16-20 °S. 18-20 °S was considered as the south limit of the influences from monsoonal rainfall (Bow- man, 1996, Burbidge, 1960), 15-16 °S was considered as the southern limit of wet season as well as the south- ern limit of monsoon tall-grass savannas (Cook and Heerde- gen, 2001). Meanwhile, in terms of vegetation family and species, the major changes occur around 16-17 °S (Egan and Williams, 1996). Based on these findings, we hypothesised that, if such a virtual biogeographical

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