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NOy and Biomass Burning

NOy and Biomass Burning Don Smart and M. A. Shea Withlow et al. (1994) found that the Ice record in the Arctic contained a record of biomass

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NOy and Biomass Burning

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  1. NOyand Biomass Burning Don Smart and M. A. Shea Withlow et al. (1994) found that the Ice record in the Arctic contained a record of biomass burning determined from the analysis of Ammonia and Sulfates. They noted an association between the NO3 increases and the ammonia increases. Adapted from Withlow et al., Tellus, 46B, fig 2, p236 When these data are compared with the higher resolution (20 to 30 samples per year) GIPS2-H data, these bi-annual increases were resolved into several individual NOyincreases.

  2. Withlowet al. (1994) concentrated on core sections dated between 1882 and 1887 (with ~ 6 samples per year resolution) and again noted an association between the NO3 increases and the ammonia increases.

  3. Dibb(UNH, private communication, 2012) analyzed the GISP2-B core for ion chemistry. The Ammonia and nitrate data for 1890-1900 (~10 samples/year) are shown below. Below is the comparison with the GISP2-H core

  4. Comparison of GISP2-B (inverted for linear time) and GISP2-H Note displacement of large peak by about a year Note large conductivity in late 1985 in GISP2-H 1894 and 1895, very bad forest fires in North America

  5. Comparison of GISP2-B (inverted for linear time) and GISP2-H If this peak is moved ~6 months, it then corresponds to the time of the August-October 1894 large forest fires

  6. The very high conductivity in the GISP2-H core dated 1895 is unusual. We only have one other case in the GISP2-H core where we note such a high conductivity (not associated with a volcano) and that case is dated as late 1859 (the Carrington Event)

  7. Biomass burning, if it can be accurately dated, could be very useful in establishing time markers for the analysis of ice core data.

  8. Unfortunately, there is often no correlation between biomass detection at different sites. Fuhrer et al., (JGR, 101D, 4147, 1996) found no correlation between the area burned In Northern North America and the Ammonium summer concentrations on the central Greenland Ice Sheet. He suggests that meteorological factors predominate.

  9. Jack Dibb (UNH) has been working on the GISP2-B core for chemical analysis for 1937-1953.

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