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Tonatiuh Guillermo Nuñez Ramirez
PhD Student

Phone: + 49 3641 576322
fax: + 49 3641 577300
email: tnunez@bgc-jena.mpg.de


Research Focus:

Global inverse modeling of methane (CH4) fluxes with the additional constraints of the δ13CH4 isotopic signal and the ethane (C2H6) mixing ratio.

Research Interests:

I use atmospheric observations of the CH4 and C2H6 (a co-emitted hydrocarbon) mixing ratio and the δ13CH4 isotopic signal to derive the sources driving the observed variability in these tracers in a Bayesian inverse modeling framework. The spatiotemporal patterns extracted from the inversion can be used to elucidate the biogeochemical processes controlling natural sources, primarily wetlands. The ability to quantify anthropogenic emissions is also important in the discussion to set emission reduction targets at global or regional scale.

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Research Activities:

  • Harmonizing different data sets of atmospheric CH4, δ13CH4 and C2H6 measurements including flask samples, continuous in-situ measurements and column soundings.
  • Compiling and evaluating CH4 bottom-up emission data sets (inventories, model output, upscaling using remote sensing data) for use as a-priori information in inversions.
  • Running an evaluating different inverse modeling set-ups (assumptions for a-priori fluxes, photochemical and soil sinks, uncertainties and correlation).
  • Determining what is driving the a-posteriori variability of wetland CH4 fluxes by correlating with global observation-based products.

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CV - Education:

I have a very interdisciplinary background, which includes mechatronic systems, satellite engineering, earth system science and biogeochemical cycles.

Curriculum Vitae

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Selected Presentations:

  • Nunez Ramirez, T. G., Houweling, S., Marshall, J. et al., The Effect of the Interannual Variability of the OH Sink on the Interannual Variability of the Atmospheric Methane Mixing Ratio and Carbon Stable Isotope Composition, EGU General Assembly 2013, held 7-12 April, 2013 in Vienna, Austria, id. EGU2013-10814 Poster
  • Nunez Ramirez, T. G., Houweling, S., Marshall, J. et al., Isolating wetland CH4 emissions using the additional constraints of δ13CH4, and C2H6 in a inverse modeling framework, EGU General Assembly 2015, held 12-17 April, 2015 in Vienna, Austria, id. EGU2015-13458-8 Presentation

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