Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-1391-2020 |
A new look at the environmental conditions favorable to secondary ice production | |
Korolev, Alexei1; Heckman, Ivan1; Wolde, Mengistu2; Ackerman, Andrew S.3; Fridlind, Ann M.3; Ladino, Luis A.1,4; Lawson, R. Paul5; Milbrandt, Jason1; Williams, Earle6 | |
2020-02-05 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:3页码:1391-1429 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA; Mexico |
英文摘要 | This study attempts a new identification of mechanisms of secondary ice production (SIP) based on the observation of small faceted ice crystals (hexagonal plates or columns) with typical sizes smaller than 100 mu m. Due to their young age, such small ice crystals can be used as tracers for identifying the conditions for SIP. Observations reported here were conducted in oceanic tropical mesoscale convective systems (MCSs) and midlatitude frontal clouds in the temperature range from 0 to -15 degrees C and heavily seeded by aged ice particles. It was found that in both MCSs and frontal clouds, SIP was observed right above the melting layer and extended to higher altitudes with colder temperatures. The roles of six possible mechanisms to generate the SIP particles are assessed using additional observations. In most observed SIP cases, small secondary ice particles spatially correlated with liquid-phase, vertical updrafts and aged rimed ice particles. However, in many cases, neither graupel nor liquid drops were observed in the SIP regions, and therefore, the conditions for an active Hallett-Mossop process were not met. In many cases, large concentrations of small pristine ice particles were observed right above the melting layer, starting at temperatures as warm as -0.5 degrees C. It is proposed that the initiation of SIP above the melting layer is stimulated by the recirculation of large liquid drops through the melting layer with convective turbulent updrafts. After re-entering a supercooled environment above the melting layer, they impact with aged ice, freeze, and shatter. The size of the splinters generated during SIP was estimated as 10 mu m or less. A principal conclusion of this work is that only the freezing-drop-shattering mechanism could be clearly supported by the airborne in situ observations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000512999100004 |
WOS关键词 | FREEZING WATER DROPLETS ; MIXED-PHASE CLOUDS ; PARTICLE CONCENTRATIONS ; MULTIPLICATION MECHANISM ; MICROPHYSICAL PROPERTIES ; NUCLEATING PARTICLES ; SPLINTER PRODUCTION ; SNOW CRYSTALS ; THERMAL SHOCK ; HIGH-SPEED |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/248830 |
专题 | 地球科学 |
作者单位 | 1.Environm & Climate Change Canada, Toronto, ON, Canada; 2.CNR, Ottawa, ON, Canada; 3.NASA, Goddard Inst Space Studies, New York, NY 10025 USA; 4.Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, Mexico; 5.Stratton Pk Engn Co, Boulder, CO USA; 6.MIT, Boston, MA USA |
推荐引用方式 GB/T 7714 | Korolev, Alexei,Heckman, Ivan,Wolde, Mengistu,et al. A new look at the environmental conditions favorable to secondary ice production[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(3):1391-1429. |
APA | Korolev, Alexei.,Heckman, Ivan.,Wolde, Mengistu.,Ackerman, Andrew S..,Fridlind, Ann M..,...&Williams, Earle.(2020).A new look at the environmental conditions favorable to secondary ice production.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(3),1391-1429. |
MLA | Korolev, Alexei,et al."A new look at the environmental conditions favorable to secondary ice production".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.3(2020):1391-1429. |
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