Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079605 |
Ash Particles Detected in the Tropical Lower Stratosphere | |
Jensen, Eric J.1; Woods, Sarah2; Lawson, R. Paul2; Bui, T. Paul1; Pfister, Leonhard1; Thornberry, Troy Dean3,4; Rollins, AndrewW.3; Vernier, Jean-Paul5; Pan, Laura L.6; Honomichl, Shawn6; Toon, Owen Brian7,8 | |
2018-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:20页码:11483-11489 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We report here on measurements of relatively large (up to. 5-mu m maximum dimension) particles detected in the tropical western Pacific lower stratosphere. The particles were observed at low relative humidities and contain no detectable ice mass. We conclude that these particles are silicate ash injected by the Mount Kelud eruption in Indonesia a few weeks prior to the aircraft observations. The Kelud ash particles were detected by cloud probes on the National Aeronautics and Space Administration Global Hawk between the lapse rate tropopause (similar or equal to 16.5 km) and the aircraft ceiling (18.5 km). The ash particles detected in the lowermost stratosphere by the aircraft extended well into the northern subtropics. The concentration of ash particles dropped off rapidly below the lapse rate tropopause, presumably because of rapid removal by ice nucleation scavenging. Although ash particles are very effective ice nuclei, the low particle concentrations detected in the upper troposphere precludes a significant impact on cirrus clouds. Plain Language Summary We report here on measurements of relatively large (up to 5-mu m maximum dimension) particles detected in the tropical western Pacific lower stratosphere during the National Aeronautics and Space Administration Airborne Tropical TRopopause EXperiment Global Hawk flights in early March 2014. The particles were observed at low relative humidities and contain no detectable ice mass. We conclude that these particles are silicate ash injected by the Mount Kelud volcanic eruption in Indonesia a few weeks prior to the Airborne Tropical TRopopause EXperiment flights. The Kelud ash particles were detected by cloud probes on the Global Hawk between the lapse rate tropopause (16.5 km) and the aircraft ceiling (18.5 km). The ash particles sampled in the lowermost stratosphere by the aircraft extended further north than the Kelud plume measured by spaceborne lidar at higher altitudes. The concentration of ash particles dropped off rapidly below the lapse rate tropopause, presumably because of rapid removal by ice nucleation on the ash particles followed by ice crystal sedimentation. Although ash particles are very effective ice nuclei, the low particle concentrations detected in the upper troposphere preclude a significant impact on cirrus microphysical properties. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451510500078 |
WOS关键词 | ICE WATER-CONTENT ; SIZE DISTRIBUTIONS ; AEROSOL LAYER ; EL-CHICHON ; NUCLEATION ; ERUPTIONS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27825 |
专题 | 气候变化 |
作者单位 | 1.NASA, Ames Res Ctr, Moffett Field, CA 94035 USA; 2.Spec Inc, Boulder, CO USA; 3.NOAA, Chem Sci Div, ESRL, Boulder, CO USA; 4.Cooperat Inst Res Environm Sci, Boulder, CO USA; 5.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 6.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 7.Univ Colorado Boulder, Dept Atmospher & Ocean Sci, Boulder, CO USA; 8.Univ Colorado Boulder, Lab Atmospher & Space Phys, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Jensen, Eric J.,Woods, Sarah,Lawson, R. Paul,et al. Ash Particles Detected in the Tropical Lower Stratosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(20):11483-11489. |
APA | Jensen, Eric J..,Woods, Sarah.,Lawson, R. Paul.,Bui, T. Paul.,Pfister, Leonhard.,...&Toon, Owen Brian.(2018).Ash Particles Detected in the Tropical Lower Stratosphere.GEOPHYSICAL RESEARCH LETTERS,45(20),11483-11489. |
MLA | Jensen, Eric J.,et al."Ash Particles Detected in the Tropical Lower Stratosphere".GEOPHYSICAL RESEARCH LETTERS 45.20(2018):11483-11489. |
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