Evaluation of MODIS-LAI products in the tropical dry secondary forest of Mata Seca, Minas Gerais, Brazil

• Author / Creator

  Yamarte, Payri A

• Leaf Area Index (LAI) advances scientific knowledge of the role of secondary forests in forest area conservation. MODIS-LAI products provide an alternative, efficient and cost-effective method for measuring LAI in Tropical Dry Forests (TDFs). The performance of MODIS-LAI satellite products in a TDF was studied as a function of successional stages by (1) estimating seasonal LAI variations compared to in situ LAI values (2) using dry season MODIS-LAI products to estimate Woody Area Index (WAI) (3) estimating phenology changes through comparisons to in situ data. The study demonstrates (1) MODIS-LAI product showed agreement with in situ values with increasing successional stage. (2) MODIS-LAI product showed best agreement to in situ WAI values in the intermediate successional stage. (3) TIMESAT analysis indicated that MODIS-LAI products detected start-of-season 1-2 weeks before in situ values and end-of-season 20-30 days after in situ values, indicating that MODIS-LAI product captures canopy leafing, but is not suitable for detecting senescence

• Subjects / Keywords

  • Leaf Area Index
  • Phenology
  • Tropical Secondary Forest Succession
  • Validation
  • LAI-2000
  • Woody Area Index
  • Hemispherical Photography
  • MODIS

• Graduation date

  Spring 2013

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3ZS74

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.