气候变化领域集成服务门户(CCPortal): The diurnal and seasonal variability of ice-nucleating particles at the High Altitude Station Jungfraujoch (3680 m a.s.l.), Switzerland

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DOI	10.5194/acp-22-7557-2022
	The diurnal and seasonal variability of ice-nucleating particles at the High Altitude Station Jungfraujoch (3680 m a.s.l.), Switzerland
	Brunner, Cyril; Brem, Benjamin T.; Collaud Coen, Martine; Conen, Franz; Steinbacher, Martin; Gysel-Beer, Martin; Kanji, Zamin A.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7557
结束页码	7573
卷号	22 期号:11 页码:17
英文摘要	Cloud radiative properties, cloud lifetime, and precipitation initiation are strongly influenced by the cloud phase. Between similar to 235 and 273 K, ice-nucleating particles (INPs) are responsible for the initial phase transition from the liquid to the ice phase in cloud hydrometeors. This study analyzes immersion-mode INP concentrations measured at 243 K at the High Altitude Research Station Jungfraujoch (3580 m a.s.l.) between February 2020 and January 2021, thereby presenting the longest continuous, high-resolution (20 min) data set of online INP measurements to date. The high time resolution and continuity allow us to study the seasonal and the diurnal variability of INPs. After exclusion of special events, like Saharan dust events (SDEs), we found a seasonal cycle of INPs, highest in April (median in spring 3.1 INP std L-1) followed by summer (median: 1.6 INP std L-1) and lowest in fall and winter (median: 0.5 and 0.7 INP std L-1, respectively). Pollen or subpollen particles were deemed unlikely to be responsible for elevated INP concentrations in spring and summer, as periods with high pollen loads from nearby measurement stations do not coincide with the periods of high INP concentrations. Furthermore, for days when the site was purely in the free troposphere (FT), no diurnal cycle in INP concentrations was observed, while days with boundary layer intrusions (BLIs) showed a diurnal cycle. The seasonal and diurnal variability of INPs during periods excluding SDEs is within a factor of 7 and 3.3, respectively, significantly lower than the overall variability observed in INP concentration including SDEs of more than 3 orders of magnitude, when peak values result from SDEs. The median INP concentration over the analyzed 12 months was 1.2 INP std L-1 for FT periods excluding SDEs and 1.4 INP std L-1 for both FT and BLI, and including SDEs, reflecting that despite SDEs showing strong but comparatively brief INP signals, they have a minor impact on the observed annual median INP concentration.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000809059500001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273231
作者单位	Swiss Federal Institutes of Technology Domain; ETH Zurich; Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; Federal Office of Meteorology & Climatology (MeteoSwiss); University of Basel; Swiss Federal Institutes of Technology Domain; Swiss Federal Laboratories for Materials Science & Technology (EMPA)
推荐引用方式 GB/T 7714	Brunner, Cyril,Brem, Benjamin T.,Collaud Coen, Martine,et al. The diurnal and seasonal variability of ice-nucleating particles at the High Altitude Station Jungfraujoch (3680 m a.s.l.), Switzerland[J],2022,22(11):17.
APA	Brunner, Cyril.,Brem, Benjamin T..,Collaud Coen, Martine.,Conen, Franz.,Steinbacher, Martin.,...&Kanji, Zamin A..(2022).The diurnal and seasonal variability of ice-nucleating particles at the High Altitude Station Jungfraujoch (3680 m a.s.l.), Switzerland.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(11),17.
MLA	Brunner, Cyril,et al."The diurnal and seasonal variability of ice-nucleating particles at the High Altitude Station Jungfraujoch (3680 m a.s.l.), Switzerland".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.11(2022):17.