Cons 127 - Abrupt and Gradual Change.pdf

Cons 127 - Abrupt and Gradual Change.pdf - Observing change...

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2019-03-21 How and Why is it Changing? Observing change from Space Part 2: Abrupt Changes 1 Observing change from space: Abrupt Change Gradual Change How and Why is it Changing? Observing change from Space Part 2: Abrupt Changes 1 Brandon Prehn MSc Student, Forestry [email protected] Presentation adapted from Douglas Bolton’s 2018 Lecture Learning Objectives Last lecture we learned about cyclical patterns on Earth Today, we will focus on abrupt and gradual changes: First, define land cover and land use Abrupt What are the types observed? How are they observed? Focus on vegetation, fires, and animal movement Gradual What are the types observed? How do we measure these changes? Focus on vegetation How and Why is it Changing? Observing change from Space Part 2: Abrupt Changes 2 Land cover and land use Land cover is the physical and biological cover over the surface of land, including water, vegetation, bare soil, and/or artificial structures. How and Why is it Changing?Our Changing Land Cover and Land Use of Earth 3
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2019-03-21 How and Why is it Changing? Observing change from Space Part 2: Abrupt Changes 2 Land use is related to human activities such as agriculture, forestry and urban construction that alter land surface processes including biogeochemistry, hydrology and biodiversity. Credit: "PikiWiki Israel 4207 landscape in Ramat Hagolan" by Shifra Levyathan. Licensed under CC BY 2.5 via Wikimedia Commons - iWiki_Israel_4207_landscape_in_Ramat_Hagolan.jpg How and Why is it Changing?Our Changing Land Cover and Land Use of Earth 4 Land cover and land use What land cover ? forest; woodland What land use ? pasture; agroforest What land cover ? forest What land use ? low-density residential
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2019-03-21 How and Why is it Changing? Observing change from Space Part 2: Abrupt Changes 3 What land cover ? grassland What land use ? pasture; agriculture Land Cover / Land Use Change: Example: Deforestation Deforestation is the conversion of forest to another land use that cause long-term reduction of the tree canopy cover Important for Global carbon cycle Loss of species Soil erosion and ultimately desertification Land cover change: Forest > Bare soil Land use change: Low density residential or natural ecosystem > Agriculture Deforestation in the amazon @ Wikimedia Commons How and Why is it Changing? How is Environmental Change Monitored from Space? 8 Rubber plantations Peru Deforestation in Peru between 5 October 2012 and 28 August 2013 @ NASA Earth Observatory images by Jesse Allen and Robert Simmon How and Why is it Changing? How is Environmental Change Monitored from Space?
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  • Spring '16
  • Carroll
  • Mountain pine beetle, Douglas Bolton

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