1 / 32

Global Landcover and Disturbance Analysis: Understanding Human and Ecological Systems

This seminar explores the dynamics of global land transitions, land use, and land cover, and their impacts on human and ecological systems. It examines the role of human decision-making, institutions, culture, technology, and population in shaping landcover changes. It also addresses economic and ecological problems such as poverty, unequal wealth distribution, pollution, diseases, food/fiber/fuel shortages, and overcrowding. The seminar discusses the importance of ecosystem goods and services, including clean air/water, waste recycling, food/fiber/fuel production, and recreation. Uncertainties in forest monitoring, global land cover classification, and landcover change patterns are also explored.

falbo
Download Presentation

Global Landcover and Disturbance Analysis: Understanding Human and Ecological Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Global Landcover and Disturbance Analysis NRSM 532 BIOS 534 April 17, 2017 City Lights from night time images (Chris Elvidge NOAA)

  2. DYNAMIC GLOBAL LAND TRANSITIONS LANDUSE [Human control] LANDCOVER [Biophysically controlled] -Biogeochemistry-Genetic bank-Water-Air Human Systems Ecological Systems HUMAN DECISION MAKING political/economic choices -Institutions Culture Technology Population Economic Economic Problems -poverty -unequal wealth -war -globalization Ecological Problems • pollution • diseases • food/fibre/fuel shortages • overcrowding Ecosystem goods & services • clean air/water • waste recycling • food/fibre/fuel • recreation

  3. UNBC Seminar

  4. The world’s forests: take your pick > 60% IGBP Closed forest >10% FAO Official definition > 40% - Forestry definition UNBC Seminar

  5. Cartoon of Bush 1st UNBC Seminar

  6. UNBC Seminar

  7. Uncertainties concerning forest monitoring • Different definitions and protocols between and within countries. • Very varying national capabilities to monitor forests and land cover. • Remote sensing data are often unavailable • Costs • Satellite acquisition strategies • Internationally published results yield uncertain results. • No current commitment for many key products and services. UNBC Seminar

  8. Global land cover classification (8 km resolution) Key: 1: Evergreen Needleleaf Forests 2:Evergreen Broadleaf Forests 3: Deciduous Needleleaf Forests 4: Deciduous Broadleaf Forests 5: Mixed Forests 6: Woodlands 7: Wooded Grasslands/Shrubs 8: Closed Bushlands or Shrublands 9: Open Shrublands 10: Grasses 11: Croplands 12: Bare 13: Mosses and Lichens UNBC Seminar

  9. UNBC Seminar

  10. MODIS 500 meter continuous field result for the lower 48 United States Comparing results with USFS forest area estimates by state Percent tree cover threshold at which continuous field area estimate matches USFS estimate. Note much lower threshold used in south west UNBC Seminar

  11. MODIS Phenology Logic

  12. UNBC Seminar

  13. MOD12Q2: Global Vegetation Phenology From Mark Friedl, Boston Univ. First global products for vegetation phenology based on MODIS EVI data released for 2001-2004 • Identifies key transition dates in growing season Onset EVI maximum Onset EVI increase Onset EVI minimum Onset EVI decrease

  14. Landcover Change

  15. The difference between potential” and “actual” landcover and the role of humans UNBC Seminar

  16. 23 March 2001, p. 2294. UNBC Seminar

  17. New York Times June 11, 1992 UNBC Seminar

  18. August 15, 1992 September 12, 1999 Land Cover Classification Forest Cover Lost 92 Km2 4,5,3 (RGB) 049-022 Landsat ETM+ 4,5,3 (RGB) 049-022 Landsat TM Percent Forest Lost 10% Forest Lost/Year 13.1 Km2 British Colombia, Canada:The bright blue patches are areas of mostly bare ground left after logging. While clearcuts in the 1992 image have likely been replanted, the limited red return from these patches in the 1999 image demonstrate how slowly forest regenerates in these environments. This 1169 Km2 region lost 92 Km2 of forest (10%) from 1992-1999. 1992 - 1999 Research Partners UNBC Seminar

  19. Clearing Epoch 1985-88 1988-91 1991-95 1995-99 1999-01 Undisturbed Forest Landsat Disturbance History Example: Virginia

  20. Global Forest Cover Change 2000 - 2012 Hansen, M. et al. Science 2013

  21. GLOBAL Generalized Disturbance Index Mildrexler et al 2006 Mildrexler et al 2006

  22. Comparison of Land Surface Temperatures from Aqua MODIS Sahara Desert vs central African Tropical Forest Mildrexler, Zhou, Running. AGU Eos 87:461, 2006

  23. Aqua MODIS Maximum Annual Land Surface Temperature (2003-2009) Mildrexler, Zhou, Running. AGU Eos 87:461, 2006

  24. Comparison of Land Surface Temperatures from Aqua MODIS Irrigated Poplar vs arid Sagebrush, central Oregon Mildrexler, Zhou, Running. AGU Eos 87:461, 2006

  25. Disturbance Impact on Land Biophysics

  26. MODIS Fire Detection YD 211-220, 2006

  27. 700 Relative Change CO2 Concentration (ppm) 360 2000 2150 2100 Year Time Lag in Biospheric Responsesto Changing Climate Phenology, NPP CO2 Disturbance Biome Shifts Land Temperature

More Related