DOI: 10.1002/grl.50840
论文题名: Plutonium-238 observations as a test of modeled transport and surface deposition of meteoric smoke particles
作者: Dhomse S.S. ; Saunders R.W. ; Tian W. ; Chipperfield M.P. ; Plane J.M.C.
刊名: Geophysical Research Letters
ISSN: 0094-8661
EISSN: 1944-8392
出版年: 2013
卷: 40, 期: 16 起始页码: 4454
结束页码: 4458
语种: 英语
英文关键词: Fe fertilization
; ice cores
; meteoric smoke
; stratosphere-troposphere exchange
; wet deposition
Scopus关键词: Atmospheric particles
; Chemistry-climate models
; Hemi-spheric asymmetries
; Ice core
; Meteoric smokes
; Oxide nanoparticles
; Stratosphere-troposphere exchange
; Wet deposition
; Atmospheric movements
; Climate models
; Plutonium
; Smoke
; Deposition
; atmospheric deposition
; atmospheric pollution
; climate modeling
; ice core
; mesosphere
; meteor
; numerical model
; observational method
; particulate matter
; plutonium isotope
; smoke
; stratosphere-troposphere interaction
; three-dimensional modeling
英文摘要: There are large uncertainties in the transport and surface deposition of upper atmospheric particles used to construct climate proxies. Here we use a 3-D chemistry-climate model (CCM) to simulate the transport and deposition of plutonium-238 oxide nanoparticles formed after the ablation of a power unit in the upper stratosphere (~11°S) in 1964. The model reproduces both the observed hemispheric asymmetry and time scale of Pu-238 deposition. We then use the CCM to investigate the transport of meteoric smoke particles (MSPs) from the upper mesosphere. The strongest MSP deposition is predicted to occur at middle latitudes, providing a significant source of Fe fertilization to the Southern Ocean. The model also predicts substantially more deposition in Greenland than in Antarctica (by a factor of ~15, in agreement with ice core measurements), showing that climate proxy measurements from a limited number of sites must be interpreted with care. Key Points Pu-238 particles provide a useful tracer from the stratosphere to the surface Meteoric smoke is mostly deposited at middle latitudes Significant levels of cosmic Fe may be deposited in the Southern Ocean. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883109003&doi=10.1002%2fgrl.50840&partnerID=40&md5=37fe9bb62b93b5833746eccb4ed1af0b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5925
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Environment, University of Leeds, Leeds, United Kingdom
Recommended Citation:
Dhomse S.S.,Saunders R.W.,Tian W.,et al. Plutonium-238 observations as a test of modeled transport and surface deposition of meteoric smoke particles[J]. Geophysical Research Letters,2013-01-01,40(16).