气候变化领域集成服务门户(CCPortal): Estimation of Possible Primary Biological Particle Emissions and Rupture Events at the Southern Great Plains ARM Site

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DOI	10.1029/2021JD034679
	Estimation of Possible Primary Biological Particle Emissions and Rupture Events at the Southern Great Plains ARM Site
	Subba T.; Lawler M.J.; Steiner A.L.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	We use 10 years of data from the Department of Energy (DoE) Atmospheric Radiation Measurements (ARM) United States Southern Great Plains (SGP) site with nearby regional pollen and fungal spore measurements to indirectly estimate the seasonal influence of these two primary biological aerosol particles (PBAP). We estimate possible primary emissions of larger PBAP and PBAP rupture events, which form submicron organic aerosol during precipitation or high relative humidity. High pollen counts at two urban stations near SGP occur during late winter/early spring (day of year (DOY) 50–120) and late summer (DOY 240–310). Around 4–19 days per year show possible pollen events (PPE) when near-surface lidar observations of daily linear particle depolarization ratio >0.1 are coincident with high organic aerosol fraction. For PPE days with rainfall, aerosol size distribution observations show enhanced submicron particle concentrations consistent with pollen rupture events. For fungal spores, high fungal spore counts occur during late spring/early summer (DOY 110–195) and late summer/autumn (DOY 220–340). Based on size distribution observations, up to 7% of days have possible fungal spore rupture events (PFE) with higher aerosol number count specifically over the range expected for fungal spore fragment mobility diameter (20–50 nm). These short-lived PFE correlate with rainfall or occur after prolonged exposure to rainfall (e.g., >10 h). While the SGP site lacks direct measurements of bioaerosol and large particle sizes, this analysis suggests that PBAP primary emissions and rupture events could occur about 32 days per year, representing an important component of the aerosol budget during seasonal emissions. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol components; aerosol size distribution; biological fragments; depolarization ratio; fungal spores; humidity; pollen; rainfall
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237057
作者单位	Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Department of Chemistry, University of California, Irvine, Irvine, CA, United States; Now at Chemical Sciences Laboratory, CIRES, University of Colorado, Boulder, Boulder, CO, United States
推荐引用方式 GB/T 7714	Subba T.,Lawler M.J.,Steiner A.L.. Estimation of Possible Primary Biological Particle Emissions and Rupture Events at the Southern Great Plains ARM Site[J],2021,126(16).
APA	Subba T.,Lawler M.J.,&Steiner A.L..(2021).Estimation of Possible Primary Biological Particle Emissions and Rupture Events at the Southern Great Plains ARM Site.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Subba T.,et al."Estimation of Possible Primary Biological Particle Emissions and Rupture Events at the Southern Great Plains ARM Site".Journal of Geophysical Research: Atmospheres 126.16(2021).