Constraining past global tropospheric methane budgets with carbon and hydrogen isotope ratios in ice.

@article{Whiticar2007ConstrainingPG,
  title={Constraining past global tropospheric methane budgets with carbon and hydrogen isotope ratios in ice.},
  author={Michael J. Whiticar and Heinrich Sch{\"a}fer},
  journal={Philosophical transactions. Series A, Mathematical, physical, and engineering sciences},
  year={2007},
  volume={365 1856},
  pages={
          1793-828
        }
}
Upon closer inspection, the classical view of the synchronous relationship between tropospheric methane mixing ratio and Greenland temperature observed in ice samples reveals clearly discernable variations in the magnitude of this response during the Late Pleistocene (<50kyr BP). During the Holocene this relationship appears to decouple, indicating that other factors have modulated the methane budget in the past 10kyr BP. The delta13CH4 and deltaD-CH4 of tropospheric methane recorded in ice… CONTINUE READING

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