globalchange  > 影响、适应和脆弱性
DOI: 10.5194/cp-14-601-2018
Scopus记录号: 2-s2.0-85046749966
论文题名:
Particle shape accounts for instrumental discrepancy in ice core dust size distributions
作者: Simonsen M.F.; Cremonesi L.; Baccolo G.; Bosch S.; Delmonte B.; Erhardt T.; Astrid Kjær H.; Potenza M.; Svensson A.; Vallelonga P.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期:5
起始页码: 601
结束页码: 608
语种: 英语
Scopus关键词: data set ; dust ; ice core ; instrumentation ; mineral dust ; particle size ; sensor ; shape ; size distribution
英文摘要: The Klotz Abakus laser sensor and the Coulter counter are both used for measuring the size distribution of insoluble mineral dust particles in ice cores. While the Coulter counter measures particle volume accurately, the equivalent Abakus instrument measurement deviates substantially from the Coulter counter. We show that the difference between the Abakus and the Coulter counter measurements is mainly caused by the irregular shape of dust particles in ice core samples. The irregular shape means that a new calibration routine based on standard spheres is necessary for obtaining fully comparable data. This new calibration routine gives an increased accuracy to Abakus measurements, which may improve future ice core record intercomparisons. We derived an analytical model for extracting the aspect ratio of dust particles from the difference between Abakus and Coulter counter data. For verification, we measured the aspect ratio of the same samples directly using a single-particle extinction and scattering instrument. The results demonstrate that the model is accurate enough to discern between samples of aspect ratio 0.3 and 0.4 using only the comparison of Abakus and Coulter counter data. © 2018 Copernicus GmbH. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109571
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark; Department of Physics, University of Milan, National Institute for Nuclear Physics (INFN), Via Celoria 16, Milan, I20133, Italy; Climate and Environmental Physics, Physics Institute, Oeschger Centre for Climate Change Research, University of Bern, Sidlerstrasse 5, Bern, 3012, Switzerland; Department of Earth and Environmental Sciences, University Milano-Bicocca, Piazza della Scienza 1, Milan, I20126, Italy

Recommended Citation:
Simonsen M.F.,Cremonesi L.,Baccolo G.,et al. Particle shape accounts for instrumental discrepancy in ice core dust size distributions[J]. Climate of the Past,2018-01-01,14(5)
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