2009
DOI: 10.5194/acp-9-8681-2009
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Abstract: ) is small, potentially allowing reconstruction of past shifts in tropospheric oxidation pathways from ice cores. Assuming a Rayleigh-type process we find fractionation constants ε of −60±15‰, 8±2‰ and 1±1‰, for δ 15 N, δ 18 O and 17 O, respectively. A photolysis model yields an upper limit for the photolytic fractionation constant 15 ε of δ 15 N, consistent with lab and field measurements, and demonstrates a high sensitivity of 15 ε to the incident actinic flux spectrum. The photolytic 15 ε is process-specifi… Show more

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Cited by 168 publications
(510 citation statements)
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“…Geographic location and weather conditions may have a major influence on the number of layers within snowpack and the distribution of their physical and optical properties. Last, but not least, field observations on the Antarctic Plateau (Frey et al, 2009;France et al, 2011) show there is a much higher nitrate anion concentration in the top few centimetres of the snowpack, the region of the snowpack where the solar radiation attenuation is often non-exponential, than deeper into the snowpack, causing a potentially larger error estimating depth-integrated production rates from the z e method.…”
Section: Parameterisation Correctionmentioning
confidence: 99%
“…Geographic location and weather conditions may have a major influence on the number of layers within snowpack and the distribution of their physical and optical properties. Last, but not least, field observations on the Antarctic Plateau (Frey et al, 2009;France et al, 2011) show there is a much higher nitrate anion concentration in the top few centimetres of the snowpack, the region of the snowpack where the solar radiation attenuation is often non-exponential, than deeper into the snowpack, causing a potentially larger error estimating depth-integrated production rates from the z e method.…”
Section: Parameterisation Correctionmentioning
confidence: 99%
“…N 2 O is then thermally decomposed on a gold surface heated to 900 • C, producing a mixture of O 2 and N 2 which is then separated by gas chromatography and injected into the mass spectrometer for the dual O and N analysis (Erbland et al, 2013, and references therein). Isotopic data were corrected for any isotopic effect occurring during the analytical procedure by using the same approach as Morin et al (2009) andFrey et al (2009); international reference materials (IAEA USGS-32, 34 and 35) are given with respect to the atmospheric N 2 (AIR) and VSMOW standards, and were measured with uncertainties of ±0.5 ‰, ±2 ‰, and ±0.5 ‰, respectively.…”
Section: Stable Isotopesmentioning
confidence: 99%
“…In addition, after nitrate deposition to snow, postdepositional loss tends to increase δ 15 N remaining in snow (13,14). Therefore, understanding the trend in δ 15 N observed in natural archives requires a comprehensive evaluation of these processes.…”
mentioning
confidence: 99%