气候变化领域集成服务门户(CCPortal): Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations

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DOI	10.5194/acp-22-9767-2022
	Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations
	Wieder, Joerg; Ihn, Nikola; Mignani, Claudia; Haarig, Moritz; Buehl, Johannes; Seifert, Patric; Engelmann, Ronny; Ramelli, Fabiola; Kanji, Zamin A.; Lohmann, Ulrike; Henneberger, Jan
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9767
结束页码	9797
卷号	22 期号:15 页码:31
英文摘要	Understanding the evolution of the ice phase within mixed-phase clouds (MPCs) is necessary to reduce uncertainties related to the cloud radiative feedback in climate projections and precipitation initiation. Both primary ice formation via ice-nucleating particles (INPs) and secondary ice production (SIP) within MPCs are unconstrained, not least because of the lack of atmospheric observations. In the past decades, advanced remote sensing methods have emerged which provide high-resolution data of aerosol and cloud properties and could be key in understanding microphysical processes on a global scale. In this study, we retrieved INP concentrations and ice multiplication factors (IMFs) in wintertime orographic clouds using active remote sensing and in situ observations obtained during the RACLETS campaign in the Swiss Alps. INP concentrations in air masses dominated by Saharan dust and continental aerosol were retrieved from a polarization Raman lidar and validated with aerosol and INP in situ observations on a mountaintop. A calibration factor of 0.0204 for the global INP parameterization by is derived by comparing in situ aerosol and INP measurements, improving the INP concentration retrieval for continental aerosols. Based on combined lidar and radar measurements, the ice crystal number concentration and ice water content were retrieved and validated with balloon-borne in situ observations, which agreed with the balloon-borne in situ observations within an order of magnitude. For seven cloud cases the ice multiplication factors (IMFs), defined as the quotient of the ice crystal number concentration to the INP concentration, were calculated. The median IMF was around 80, and SIP was active (defined as IMFs > 1) nearly 85 % of the time. SIP was found to be active at all observed temperatures (-30 to -5 degrees C), with the highest IMFs between -20 and -5 degrees C. The introduced methodology could be extended to larger datasets to better understand the impact of SIP not only over the Alps but also at other locations and for other cloud types.
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:000835525000001
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/273551
作者单位	Swiss Federal Institutes of Technology Domain; ETH Zurich; University of Basel; Leibniz Institut fur Tropospharenforschung (TROPOS); Colorado State University
推荐引用方式 GB/T 7714	Wieder, Joerg,Ihn, Nikola,Mignani, Claudia,et al. Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations[J],2022,22(15):31.
APA	Wieder, Joerg.,Ihn, Nikola.,Mignani, Claudia.,Haarig, Moritz.,Buehl, Johannes.,...&Henneberger, Jan.(2022).Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(15),31.
MLA	Wieder, Joerg,et al."Retrieving ice-nucleating particle concentration and ice multiplication factors using active remote sensing validated by in situ observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.15(2022):31.