T

Tambora, Mount 39 Tang dynasty 126 technology 131-142 temperature. See also ocean temperatures; sea surface temperature current 149-151

dendrochronology to estimate 104 during geologic periods 24 and greenhouse gases in ice cores 90 and growth of civilizations 115 and historic CO2 levels 8-10 of ice sheets 88 and origins of agriculture 117 and paleolimnology 83 and speleothem research 94-95 vegetation as indication of 111 temperature records 40 Teotihuacan civilization 120, 122 thermoluminescence 54 thorium-230 dating 46, 49, 94 tidal marshes 147-148 till 70

tilt, of Earth 20

titanium 120

topsoil 76

trace metals 107

tree rings 104, 105. See also dendrochronology trilobites 17 tropical zones 79 Tuareg people 130 tufa 66

tundra 70, 79, 113 Tyndall, John 169c

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