ESCI 2610 Lecture Notes - Lecture 16: Little Ice Age, Claw Hypothesis, Axial Tilt
14 Jun 2018
School
Department
Course
Professor
Global Climate Change
Unit 4 demonstrates that knowledge of Earth processes and a systematic approach to
the evaluation of risk are needed to counteract the effects of climate change.
Eolanites: rock formed by the lithification of sediment deposited by wind.
Red beds: deposits of semi-arid setting
Bauxite: deposits of tropical-humid settings, rich in aluminum
Coal: deposits of humid settings
Fluid Inclusions: microscopic bubbles of liquid and gas that are trapped within crystals
Paleosalinites:
Laterites: rich in iron
Tillite: cold, sedimentary rock composed of glacial till, boulder clay
Core box = 5 feet
In limestone of coral reef, the main mineral is calcite.
Emperor of japan had people do silk screen art of scenery. What they captured shows
records of past climate.
Prevalent hot-house state (High CO2), strengthened greenhouse effect
Mesozoic 8-10 degrees warmer
Pleistocene (2.6 my) and Halocene (11,700 y)
Glacial (80,000 y) and interglacial (20,000 y)
Holocene Peak: 5000-6000 years ago. 1 degree warmer. Temperature fall 4000 years
ago.
Medieval Climatic Optimum (5000-9000 years ago), Little Ice Age (1350-1850), PD
warming
Sun spot cycles influence climate change. Astronomical factors (how earth revolves
around the sun, elliptical, axial tilt, time of perihelion) vs. Terrestrial (albedo,
biogeochemical cycle, aerosols, volcanic eruptions, ocean emissions from land and
phytoplankton, emissions from decay of vegetation)
CLAW Hypothesis: warming planet from enhanced greenhouse effect, increase in
oceanic phytoplankton, more DMS, increase in sulphate aerosol as nuclei for cloud
condensation, increased cloud cover, reflection of solar radiation, cooling of
troposphere
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Unit 4 demonstrates that knowledge of earth processes and a systematic approach to the evaluation of risk are needed to counteract the effects of climate change. Eolanites: rock formed by the lithification of sediment deposited by wind. Bauxite: deposits of tropical-humid settings, rich in aluminum. Fluid inclusions: microscopic bubbles of liquid and gas that are trapped within crystals. Tillite: cold, sedimentary rock composed of glacial till, boulder clay. In limestone of coral reef, the main mineral is calcite. Emperor of japan had people do silk screen art of scenery. What they captured shows records of past climate. Prevalent hot-house state (high co2), strengthened greenhouse effect. Medieval climatic optimum (5000-9000 years ago), little ice age (1350-1850), pd warming. Astronomical factors (how earth revolves around the sun, elliptical, axial tilt, time of perihelion) vs. terrestrial (albedo, biogeochemical cycle, aerosols, volcanic eruptions, ocean emissions from land and phytoplankton, emissions from decay of vegetation)
