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Slides for GGR 314, Global Warming Chapter 3: The Carbon Cycle Course taught by Danny Harvey Department of Geography University of Toronto.

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Presentation on theme: "Slides for GGR 314, Global Warming Chapter 3: The Carbon Cycle Course taught by Danny Harvey Department of Geography University of Toronto."— Presentation transcript:

1 Slides for GGR 314, Global Warming Chapter 3: The Carbon Cycle Course taught by Danny Harvey Department of Geography University of Toronto

2 Exhibit 3-1: The pre-industrial carbon cycle

3 Exhibit 3-2: Collapsing vegetation and exposure of previously frozen C-rich soils as permafrost warms Source:

4 Exhibit 3-3: A carbon rich soil above permafrost (left) and ice wedges in permafrost (left) Source:

5 Exhibit 3-4: Diatoms, depicted below, have SiO 2 (siliceous, made of silica) skeletons Source: Wikipedia, Open Source photo in article on plankton

6 Exhibit 3-5: Coccoliths (left) and foraminifera (right) have calcium carbonate (calcareous) skeletons Source: Left, Wikipedia, Richard Lampitt and Jeremy Young in article on “Coccolithophore” Right, Wikipedia article on “Foraminifera”, author Psammophile Width of image: 5.5 mm

7 Exhibit 3-6: Geographical variation in net primary productivity of the world’s oceans Source: Schlesinger (1991)

8 Exhibit 3-7: Variation of potential pCO 2 in the low-latitude ocean Source: Broecker and Peng

9 Exhibit 3-8: Impulse responses – the variation in the amount of a GHG remaining in the atmosphere after a “pulse” (sudden) emission at time t=0. Source: Harvey (2000, Global Warming: The Hard Science, Prentice Hall)

10 Exhibit 3-9: Simulated variation in the terrestrial biosphere sink using the LPJ dynamic global vegetation model driven either by observed temperature and precipitation variations (CRU Climatology) or with output from two climate models Source: Fischlin et al (2007, IPCC AR4, WGII)

11 Exhibit 3-10: CO 2 emissions and CO 2 sinks for a scenario where trend of increasing emissions turns around between Source: Harvey (1989, Climatic Change, Vol. 15, )

12 Exhibit 3-11: Methane escaping from thawing yedoma (loess) soils in Siberia

13 Exhibit 3-12: Sonar image of methane bubbles rising from the sea floor along a 2.5 km segment in 250-m deep water west of Svalbard (Arctic Ocean) Source: Kerr (2010, Science, Vol. 329, ) Video, methane from frozen lakes, ignited Methane bubbling from lakes Methane bubbling from lakes

14 Exhibit 3.13a: CO 2 stabilization scenarios

15 Exhibit 3-13b: Range of CO 2 emissions permitted for the various stabilization scenarios


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