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Monitoring tropical forests with cloud-free Landsat image mosaics

This study explores the use of cloud-free Landsat image mosaics for monitoring tropical forests. The researchers develop techniques to remove clouds and shadows from the images, allowing for more accurate analysis of forest formations and land cover. The study also focuses on urban development in Puerto Rico and the US Virgin Islands, as well as the wintering ecology of Kirtland's Warbler in the Bahamas.

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Monitoring tropical forests with cloud-free Landsat image mosaics

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  1. Monitoring tropical forests with cloud-free Landsat image mosaics E.H. Helmer, Tom Brandeis, Joe Wunderle, Charles Kwit, Michael Lefsky, Bonnie Ruefenacht and Tom Ruzycki LDCM Science Team Meeting January 9-11, 2007 Sioux Falls, South Dakota

  2. Image with Clouds Image with Cloud/Shadow Mask Image with the Clouds Removed Helmer and Ruefenacht, 2005, PERS

  3. Mosaicked ~1991 Image Matched ~1991 Image Matched ~2000 Mosaicked ~2000 Helmer and Ruefenacht, 2005, PERS

  4. Northeastern Puerto Rico urban change

  5. Land cover and forest formations PuertoRico

  6. Grenada Forest Formations and Land Cover, 2000 Helmer et al. submitted

  7. St. Kitts and Nevis Forest Formations and Land Cover, 2000 Helmer et al. submitted

  8. Leaf-on Leaf-off Reference images Atmospheric Correction Image Match Histogram Match Regression Tree

  9. Further studies will test long time series of cloud-free mosaics • Forest canopy variables in Eleuthera (The Bahamas) • Forest ecosystem attributes, types, and multi-time step urban development in Puerto Rico and the US Virgin Islands

  10. Kirtland’s Warbler wintering ecology in the Bahamas Joseph M. Wunderle, Jr., US Forest Service Dave Currie, Puerto Rico Conservation FoundationDavid N. Ewert, The Nature Conservancy

  11. Most research on breeding grounds 1500 miles Wunderle, Currie, Ewert 2006

  12. Kirtland’s Warbler wintering ecology studies Eleuthera • 113 D. kirtlandii anilladas 2002-2006 • Seis sitios con múltiples aves estudiadas 1-3 años • Invierno dividido en tres periodos: temprano, medio y tardío. Wunderle, Currie, Ewert 2006

  13. Fruits are important to winter diet Chiococca spp. Erithalis spp. Arthropods Fruits Lantana spp. N= 422 observaciones

  14. Southern Eleuthera, TheBahamas • Forest canopy height and cover • Species composition • Fruiting phenology • (Evapotranspiration) • ± 60 plots Quickbird imagery, Nov. 2004

  15. FIA Plots – Puerto Rico and USVI • Forest attributes • (biomass, growth, type)

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