SLUMP
发表于 2025-3-30 09:19:21
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含水层
发表于 2025-3-30 12:23:11
Philip Hoyer‰) in glacial isotopic stages 2 to 4 and stage 6, and lower values (-20 to -21.2‰) in interglacial stages 1 and 5. Seasurface temperatures, derived from the alkenone U.. index, vary in the opposite sense, ranging from 20–22°C in glacial stages up to 24–26°C in interglacial stages. The inverse relati
dowagers-hump
发表于 2025-3-30 19:53:04
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滑动
发表于 2025-3-30 20:44:16
Detlef Houdeauic matter sedimenting to the sea floor. In the modern ocean, the natural abundance of .N (δ.N) varies in a regular way within planktonic ecosystems as a result of biological isotopic fractionation: the δ.N of the primary producers depends on the isotopic composition of the inorganic forms of nitroge