Solar proton events from a 180 year depth profile of nitrate concentrations from the central Greenland ice sheet

Details Solar proton events from a 180 year depth profile of nitrate concentrations from the central Greenland ice sheet Solar proton events from a 180 year depth profile of nitrate concentrations from the central Greenland ice sheet

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993kul..reptr....d&link_type=abstract

Annual Report, 1 Nov. 1992 - 31 Oct. 1993 Kansas Univ. Center for Research, Inc., Lawrence.

Physics

Core Sampling, Electrical Resistivity, Ice, Nitrates, Solar Activity, Solar Protons, Cores, Depth, Greenland, Melting, Temporal Resolution

Scientific paper

Operations have been concentrated on the micro-resolution analysis of the 120 meter ice core that was collected in Greenland in June, 1992. Thus far, 64 meters of the ice core have been sampled and a total of over 4000 individual samples have been analyzed for both nitrate and electrical conductivity. It has been possible to identify a number of specific anomalies in both the nitrate and the electrical conductivity records. Strong nitrate anomalies related to known solar flares have been identified, and it will become possible to delineate a signal of solar activity well beyond the known geophysical records. It has also been observed that periods of known low solar activity also correlate with lower than normal nitrate concentration and yearly nitrate flux. A new automatic ice core melting apparatus has been designed and built that will permit sampling the remaining ice cores at a higher resolution than was previously possible. This is a significant advantage because deeper ice cores are more compacted and the higher sampling frequency will maintain nearly the same time resolution as that obtained nearer the surface.

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