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FIGURE 13-1 Mammals of the glacial maximum, 21000 years ago Chapter 13 The Last Glacial Maximum.

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Presentation on theme: "FIGURE 13-1 Mammals of the glacial maximum, 21000 years ago Chapter 13 The Last Glacial Maximum."— Presentation transcript:

1 FIGURE 13-1 Mammals of the glacial maximum, 21000 years ago Chapter 13 The Last Glacial Maximum

2 FIGURE 13-2 A cave painting of the glacial era

3 FIGURE 13-3 Boundary conditions for simulating glacial maximum climate How do large ice sheets and lower CO2 explain global climate at the last glacial max. ?

4 FIGURE 13-4A The CLIMAP reconstruction of glacial maximum ocean temperatures

5 FIGURE 13-4B The CLIMAP reconstruction of glacial maximum ocean temperatures

6

7 FIGURE 13-5 How thick were the ice sheets?

8 FIGURE 13-6 Glacial maximum loess

9 FIGURE 13-7 Desert dust

10 FIGURE 13-8 Glacial maximum sand dunes

11 FIGURE 13-9 Data-model comparisons

12 FIGURE 13-10 Pollen distributions and climate

13 FIGURE 13-11 Pollen percentages and climate

14 FIGURE 13-12 Pollen in a lake core

15 FIGURE 13-13 Modern and glacial maximum spruce

16 FIGURE 13-14 Biome models

17 FIGURE 13-15 GCM simulation of climate near the northern ice sheets

18 FIGURE 13-16 A cooler glacial North Atlantic Ocean

19 FIGURE 13-17A The glacial Southwest was wetter

20 FIGURE 13-17B The glacial Southwest was wetter

21 BOX 13-1A Older Atlantic deep water during glaciations

22 BOX 13-1B Older Atlantic deep water during glaciations

23 FIGURE 13-18 Data-model mismatch in the southeastern United States

24 FIGURE 13-19 Glacial north-central Europe was treeless

25 FIGURE 13-20 Glacial northern Asia was treeless

26 FIGURE 13-21 Early human buildings

27 FIGURE 13-22 Glacial Antarctica was surrounded by more sea ice

28 FIGURE 13-23 Glacial Australia and South America were drier

29 FIGURE 13-24 Lower CO 2 and CH 4 levels cooled the glacial tropics

30 FIGURE 13-25 Planktic fauna of the glacial maximum vs. that of today

31 FIGURE 13-26 Independent confirmation of small ocean cooling

32 FIGURE 13-27 Descent of tropical mountain glaciers and forests


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