Arid
DOI10.5194/acp-14-13145-2014
A comprehensive parameterization of heterogeneous ice nucleation of dust surrogate: laboratory study with hematite particles and its application to atmospheric models
Hiranuma, N.1; Paukert, M.1; Steinke, I.1; Zhang, K.2; Kulkarni, G.2; Hoose, C.1; Schnaiter, M.1; Saathoff, H.1; Moehler, O.1
通讯作者Hiranuma, N.
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2014
卷号14期号:23页码:13145-13158
英文摘要

A new heterogeneous ice nucleation parameterization that covers a wide temperature range (-36 to -78 degrees C) is presented. Developing and testing such an ice nucleation parameterization, which is constrained through identical experimental conditions, is important to accurately simulate the ice nucleation processes in cirrus clouds. The ice nucleation active surface-site density (n(s)) of hematite particles, used as a proxy for atmospheric dust particles, were derived from AIDA (Aerosol Interaction and Dynamics in the Atmosphere) cloud chamber measurements under water subsaturated conditions. These conditions were achieved by continuously changing the temperature (T) and relative humidity with respect to ice (RHice) in the chamber. Our measurements showed several different pathways to nucleate ice depending on T and RHice conditions. For instance, almost T-independent freezing was observed at -60 degrees C < T < -50 degrees C, where RHice explicitly controlled ice nucleation efficiency, while both T and RHice played roles in other two T regimes: -78 degrees C < T < -60 degrees C and 50 degrees C < T < 36 degrees C. More specifically, observations at T lower than -60 degrees C revealed that higher RHice was necessary to maintain a constant n(s) whereas T may have played a significant role in ice nucleation at T higher than -50 degrees C. We implemented the new hematite-derived n(s) parameterization, which agrees well with previous AIDA measurements of desert dust, into two conceptual cloud models to investigate their sensitivity to the new parameterization in comparison to existing ice nucleation schemes for simulating cirrus cloud properties. Our results show that the new AIDA-based parameterization leads to an order of magnitude higher ice crystal concentrations and to an inhibition of homogeneous nucleation in lower-temperature regions. Our cloud simulation results suggest that atmospheric dust particles that form ice nuclei at lower temperatures, below -36 degrees C, can potentially have a stronger influence on cloud properties, such as cloud longevity and initiation, compared to previous parameterizations.


类型Article
语种英语
国家Germany ; USA
收录类别SCI-E
WOS记录号WOS:000346140100032
WOS关键词CIRRUS CLOUD FORMATION ; NUMERICAL WEATHER PREDICTION ; MINERAL DUST ; EMPIRICAL PARAMETERIZATION ; DEPOSITION NUCLEATION ; AEROSOL ; NUCLEI ; COMPETITION ; MECHANISMS ; EFFICIENCY
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180922
作者单位1.Karlsruhe Inst Technol, Inst Meteorol & Climate Res Atmospher Aerosol Res, D-76021 Karlsruhe, Germany;
2.Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA
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GB/T 7714
Hiranuma, N.,Paukert, M.,Steinke, I.,et al. A comprehensive parameterization of heterogeneous ice nucleation of dust surrogate: laboratory study with hematite particles and its application to atmospheric models[J],2014,14(23):13145-13158.
APA Hiranuma, N..,Paukert, M..,Steinke, I..,Zhang, K..,Kulkarni, G..,...&Moehler, O..(2014).A comprehensive parameterization of heterogeneous ice nucleation of dust surrogate: laboratory study with hematite particles and its application to atmospheric models.ATMOSPHERIC CHEMISTRY AND PHYSICS,14(23),13145-13158.
MLA Hiranuma, N.,et al."A comprehensive parameterization of heterogeneous ice nucleation of dust surrogate: laboratory study with hematite particles and its application to atmospheric models".ATMOSPHERIC CHEMISTRY AND PHYSICS 14.23(2014):13145-13158.
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