Triassic-Jurassic climate in continental high-latitude Asia was dominated by obliquity-paced variations (Junggar Basin, Urumqi, China)

摘要: Empirical constraints on orbital gravitational solutions for the Solar System can be derived from Earth’s geological record of past climates. Lithologically based paleoclimate data thick, coal-bearing, fluvial-lacustrine sequences Junggar Basin Northwestern China (paleolatitude ∼60°) show that climate variability warm and glacier-free high latitudes latest Triassic–Early Jurassic (∼198–202 Ma) Pangea was strongly paced by obliquity-dominated (∼40 ky) cyclicity, an age model using 405-ky cycle eccentricity. In contrast, coeval low-latitude continental much more climatic precession, with virtually no hint obliquity. Although this previously unknown obliquity dominance at latitude is not necessarily unexpected in a CO2 world, these deviate substantially published period amplitude eccentricity cycles greater than 405 ky, consistent chaotic diffusion System. there are indications Earth–Mars resonance today’s 2-to-1 ratio to inclination. These empirical underscore need temporally comprehensive, highly reliable data, as well new fitting those data.