Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1061-2017 |
Processes controlling the seasonal variations in Pb-210 and Be-7 at the Mt. Cimone WMO-GAW global station, Italy: a model analysis | |
Brattich, Erika1; Liu, Hongyu2; Tositti, Laura1; Considine, David B.3; Crawford, James H.4 | |
2017-01-24 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
![]() |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; USA |
英文摘要 | We apply the Global Modeling Initiative (GMI) chemistry and transport model driven by NASA's MERRA assimilated meteorological data to simulate the seasonal variations in two radionuclide aerosol tracers (terrigenous Pb-210 and cosmogenic Be-7) at the WMO-GAW station of Mt. Cimone (44 degrees 12'N, 10 degrees 42'E; 2165 m a.s.l.; Italy), which is representative of free-tropospheric conditions most of the year, during 2005 with an aim to understand the roles of transport and precipitation scavenging processes in controlling their seasonality. The total precipitation field in the MERRA data set is evaluated with the Global Precipitation Climatology Project (GPCP) observations, and generally good agreement is found. The model reproduces reasonably the observed seasonal pattern of Pb-210 concentrations, characterized by a wintertime minimum due to lower Rn-222 emissions and weaker uplift from the boundary layer and summertime maxima resulting from strong convection over the continent. The observed seasonal behavior of Be-7 concentrations shows a winter minimum, a summer maximum, and a secondary spring maximum. The model captures the observed Be-7 pattern in winter-spring, which is linked to the larger stratospheric influence during spring. However, the model tends to underestimate the observed Be-7 concentrations in summer, partially due to the sensitivity to spatial sampling in the model. Model sensitivity experiments indicate a dominant role of precipitation scavenging (vs. dry deposition and convection) in controlling the seasonality of Pb-210 and Be-7 concentrations at Mt. Cimone. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394597600001 |
WOS关键词 | GROUND LEVEL AIR ; STRATOSPHERE-TROPOSPHERE EXCHANGE ; INITIATIVE ASSESSMENT MODEL ; CROSS-TROPOPAUSE TRANSPORT ; CHEMICAL TRACER MODEL ; SURFACE AIR ; TEMPORAL VARIATIONS ; IBERIAN PENINSULA ; METEOROLOGICAL PARAMETERS ; 3-DIMENSIONAL SIMULATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/30657 |
专题 | 地球科学 |
作者单位 | 1.Alma Mater Studiorum Univ Bologna, Dept Chem G Ciamician, I-40126 Bologna, BO, Italy; 2.Natl Inst Aerosp, Hampton, VA 23666 USA; 3.NASA Headquarters, Washington, DC 20546 USA; 4.NASA, Langley Res Ctr, Hampton, VA 23681 USA |
推荐引用方式 GB/T 7714 | Brattich, Erika,Liu, Hongyu,Tositti, Laura,et al. Processes controlling the seasonal variations in Pb-210 and Be-7 at the Mt. Cimone WMO-GAW global station, Italy: a model analysis[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(2). |
APA | Brattich, Erika,Liu, Hongyu,Tositti, Laura,Considine, David B.,&Crawford, James H..(2017).Processes controlling the seasonal variations in Pb-210 and Be-7 at the Mt. Cimone WMO-GAW global station, Italy: a model analysis.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(2). |
MLA | Brattich, Erika,et al."Processes controlling the seasonal variations in Pb-210 and Be-7 at the Mt. Cimone WMO-GAW global station, Italy: a model analysis".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.2(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论