Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0551.1 |
Recent Atmospheric Variability at Kibo Summit, Kilimanjaro, and Its Relation to Climate Mode Activity | |
Collier, Emily; Molg, Thomas; Sauter, Tobias | |
2018-05-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:10页码:3875-3891 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Accurate knowledge of the impact of internal atmospheric variability is required for the detection and attribution of climate change and for interpreting glacier records. However, current knowledge of such impacts in high-mountain regions is largely based on statistical methods, as the observational data required for process-based assessments are often spatially or temporally deficient. Using a case study of Kilimanjaro, 12 years of convection-permitting atmospheric modeling are combined with an 8-yr observational record to evaluate the impact of climate oscillations on recent high-altitude atmospheric variability during the short rains (the secondary rain season in the region). The focus is on two modes that have a well-established relationship with precipitation during this season, El Nino-Southern Oscillation and the Indian Ocean zonal mode, and demonstrate their strong association with local and mesoscale conditions at Kilimanjaro. Both oscillations correlate positively with humidity fluctuations, but the association is strongest with the Indian Ocean zonal mode in the air layers near and above the glaciers because of changes in zonal circulation and moisture transport, emphasizing the importance of the moisture signal from this basin. However, it is found the most anomalous conditions during co-occurring positive events because of the combined effects of the (i) extended positive sea surface temperature anomalies, (ii) enhanced atmospheric moisture capacity from higher tropospheric temperatures, (iii) most pronounced weakening of the subsiding branch of the Indian Ocean Walker circulation over East Africa, and (iv) stronger monsoonal moisture fluxes upstream from Kilimanjaro. This study lays the foundation for unraveling the contribution of climate modes to observed changes in Kilimanjaro's glaciers. |
英文关键词 | ENSO Cloud resolving models Climate variability Interannual variability Oscillations Tropical variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430540200006 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; GLACIER MASS-BALANCE ; INDIAN-OCEAN DIPOLE ; SHORT RAINS ; PRECIPITATION VARIABILITY ; CORDILLERA BLANCA ; KENYA RAINFALL ; EAST-AFRICA ; MECHANISMS ; OSCILLATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/20209 |
专题 | 气候变化 |
作者单位 | Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Geog, Climate Syst Res Grp, Erlangen, Germany |
推荐引用方式 GB/T 7714 | Collier, Emily,Molg, Thomas,Sauter, Tobias. Recent Atmospheric Variability at Kibo Summit, Kilimanjaro, and Its Relation to Climate Mode Activity[J]. JOURNAL OF CLIMATE,2018,31(10):3875-3891. |
APA | Collier, Emily,Molg, Thomas,&Sauter, Tobias.(2018).Recent Atmospheric Variability at Kibo Summit, Kilimanjaro, and Its Relation to Climate Mode Activity.JOURNAL OF CLIMATE,31(10),3875-3891. |
MLA | Collier, Emily,et al."Recent Atmospheric Variability at Kibo Summit, Kilimanjaro, and Its Relation to Climate Mode Activity".JOURNAL OF CLIMATE 31.10(2018):3875-3891. |
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