Abstracts » Zoology and wildlife conservation

Eccentricity forcing of Pliocene-early Pleistocene climate revealed in a marine oxygen-isotope record

Article Abstract:

The use of Milankovitch theory to explain the ~100-kyr climate cycle is a contentious issue. Its application to the Late Pleistocene ice-age cycle is particularly controversial. The theory holds that climate is determined by changes in the orbital parameters of the earth. It has proven effective in explaining two climate cycles: a 23-kyr cycle that is phase-locked to the precession-driven insolation cycle, and a 41-kyr cycle that is phase-locked to the obliquity-driven insolation cycle. Analysis of low-frequency oxygen-isotope cycles produces data supporting the role of eccentricity in the development of these cycles before the Late Pleistocene ice age.

Analysis, Paleontology, Glacial climates, Pliocene Epoch

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Synchronous changes in seawater strontium isotope composition and global climate

Article Abstract:

Changes in the ratio of oceanic strontium isotopes over the last 450,000 years raise questions about our assumptions regarding chemical weathering and strontium sources during glacial and transition periods. During the shift from interglacial to glacial and vice versa, the isotope ratio changes about three times as fast as previously thought, one part per million per 1,000 years. Unanticipated hydrothermal flux or a less homogenous ocean during these periods may be responsible.

Composition, Isotopes, Sea-water, Seawater, Strontium

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Keeping the climate treaty relevant

Article Abstract:

Setting up binding targets for greenhouse gases by the climate treaty cannot be made effective as countries do not have adequate information on the policy changes required by individual states for implementing the proposal successfully. The binding protocol should ensure that states prevent hazardous climate changes by restricting greenhouse gas emissions. The binding regulations should be carefully reviewed before implementation to ensure their success.

Prevention, Greenhouse effect

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