期刊
GEOPHYSICAL RESEARCH LETTERS
卷 48, 期 23, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2021GL096520
关键词
Oxalate; sulfate; cloud processing; CAMP(2)Ex; ACTIVATE; secondary organic aerosol
资金
- NASA [NNX15AG62A, 80NSSC18K0148, 80NSSC19K0442]
- National Science Foundation [ATM-0340832]
- National Oceanic and Atmospheric Administration [NA06OAR4310082]
- [N00014-04-1-0118]
- [N00014-10-1-0200]
- [N00014-11-1-0783]
- [N00014-10-1-0811]
- [N00014-16-1-2567]
- [N00014-04-10018]
- [N00014-21-1-2115]
- NASA [804456, NNX15AG62A] Funding Source: Federal RePORTER
This study utilized aerosol data from various field campaigns to calculate the statistics of the oxalate-sulfate mass ratio, showing that dust and biomass burning emissions can bias this ratio towards higher values.
Leveraging aerosol data from multiple airborne and surface-based field campaigns encompassing diverse environmental conditions, we calculate statistics of the oxalate-sulfate mass ratio (median: 0.0217; 95% confidence interval: 0.0154-0.0296; R = 0.76; N = 2,948). Ground-based measurements of the oxalate-sulfate ratio fall within our 95% confidence interval, suggesting the range is robust within the mixed layer for the submicrometer particle size range. We demonstrate that dust and biomass burning emissions can separately bias this ratio toward higher values by at least one order of magnitude. In the absence of these confounding factors, the 95% confidence interval of the ratio may be used to estimate the relative extent of aqueous processing by comparing inferred oxalate concentrations between air masses, with the assumption that sulfate primarily originates from aqueous processing.
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