DOI: 10.1007/s00382-015-2734-7
Scopus记录号: 2-s2.0-84936817404
论文题名: Teleconnection responses in multi-GCM driven CORDEX RCMs over Eastern Africa
作者: Endris H.S. ; Lennard C. ; Hewitson B. ; Dosio A. ; Nikulin G. ; Panitz H.-J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-09-10 起始页码: 2821
结束页码: 2846
语种: 英语
英文关键词: CMIP5
; CORDEX
; Eastern Africa
; Rainfall
; RCM
; Teleconnections
英文摘要: The ability of climate models to simulate atmospheric teleconnections provides an important basis for the use and analysis of climate change projections. This study examines the ability of COordinated Regional climate Downscaling EXperiment models, with lateral and surface boundary conditions derived from Coupled Global Climate Models (CGCMs), to simulate the teleconnections between tropical sea surface temperatures and rainfall over Eastern Africa. The ability of the models to simulate the associated changes in atmospheric circulation patterns over the region is also assessed. The models used in the study are Rossby Centre regional atmospheric model (RCA) driven by eight CGCMs and COnsortium for Small scale MOdeling (COSMO) Climate Limited-area Modelling (COSMO-CLM or CCLM) driven by four of the same CGCMs. Teleconnection patterns are examined using correlation, regression and composite analysis. In order to identify the source of the errors, CGCM-driven regional climate model (RCM) results are compared with ERA-Interim driven RCM results. Results from the driving CGCMs are also analyzed. The RCMs driven by reanalysis (quasi-perfect boundary conditions) successfully capture rainfall teleconnections in most examined regions and seasons. Our analysis indicates that most of the errors in simulating the teleconnection patterns come from the driving CGCMs. RCMs driven by MPI-ESM-LR, HadGEM2-ES and GFDL-ESM2M tend to perform relatively better than RCMs driven by other CGCMs. CanESM2 and MIROC5, and their corresponding downscaled results capture the teleconnections in most of the sub-regions and seasons poorly. This highlights the relative importance of CGCM-derived boundary conditions in the downscaled product and the need to improve these as well as the RCMs themselves. Overall, the results produced here will be very useful in identifying and selecting CGCMs and RCMs for the use of climate change projecting over the Eastern Africa. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53744
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Climate System Analysis Group, University of Cape Town, Cape Town, South Africa; European Commission Joint Research Centre, Institute for Environment and Sustainability, Ispra, Italy; Rossby Centre, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden; Karlsruher Institut für Technologie, Institut für Meteorologie und Klimaforschung, Karlsruhe, Germany
Recommended Citation:
Endris H.S.,Lennard C.,Hewitson B.,et al. Teleconnection responses in multi-GCM driven CORDEX RCMs over Eastern Africa[J]. Climate Dynamics,2016-01-01,46(2017-09-10)