ACAPEX â Ship-Based Ice Nuclei Collections Field Campaign Report

doi:10.2172/1253893

GSTDTAP > 地球科学

DOI	10.2172/1253893
报告编号	DOE/SC--ARM-16-029
来源ID	OSTI ID: 1253893
	ACAPEX â Ship-Based Ice Nuclei Collections Field Campaign Report
	DeMott, Paul J; Hill, Thomas CJ
	2016-04-01
出版年	2016
语种	英语
国家	美国
出版者	DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA
领域	地球科学
英文摘要	Measurements were sought to evaluate a hypotheses that sea-spray-sourced ice-nucleating particles (INPs) are of biological origin and represent a distinctly different INP population in comparison to long-range-transported desert or urban and regional land-sourced INP, and that the layering of marine within other aerosol layers feeding orographic storms over the mountains of California and the Western United States thereby leads to common and quantifiable scenarios that influence precipitation over the region. Aerosol collections on the National Oceanic and Atmospheric Administration (NOAA) research vessel (RV) Ronald H. Brown, for subsequent processing of INP immersion freezing activation temperature spectra and composition analyses, added a valuable measurement component to the ARM Cloud Aerosol Precipitation Experiment (ACAPEX) and related CalWater2 (NOAA) studies for use in parameterizing and modeling the impacts of marine boundary layer and other aerosols on climate and radiation via aerosol indirect effects on mixed-phase clouds. Twenty-five nominally 24-hour collections were made and have been processed for immersion freezing INP number concentrations versus temperature in the mixed-phase cloud temperature regime from -10 to -27Â°C. The similarity of INP number concentrations compared to typical marine boundary layer values attributed to sea-spray aerosols was noted. Nevertheless, variability of INP concentrations of up to 50 times was noted at individual temperatures over the course of the study. A particular analysis possible with this data set is to examine INP budgets over oceans inside versus outside of atmospheric river conditions. These INP measurements supplemented multiple airborne INP measurements on the ARM Aerial Facility (AAF), and others on the ground during ACAPEX and CalWater2, to provide extensive spatial and temporal analyses of INP immersion freezing spectra during winter storm periods. Future analyses will use thermal sensitivity to examine INP compositions as organic versus inorganic in these marine boundary layer samples. Data set integration is occurring under funding from an Atmospheric System Research (ASR) proposal.
英文关键词	atmospheric rivers ice-nucleating particles CalWater2 NOAA marine boundary layer mixed-phase clouds aerosol indirect effects sea spray aerosols
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7121
专题	地球科学
推荐引用方式 GB/T 7714	DeMott, Paul J,Hill, Thomas CJ. ACAPEX â Ship-Based Ice Nuclei Collections Field Campaign Report:DOE ARM Climate Research Facility, Pacific Northwest National Laboratory, Richland, WA,2016.