DOI: 10.1175/JCLI-D-14-00850.1
Scopus记录号: 2-s2.0-84947594009
论文题名: Sea-breeze dynamics and convection initiation: The influence of convective parameterization in weather and climate model biases
作者: Birch C.E. ; Roberts M.J. ; Garcia-Carreras L. ; Ackerley D. ; Reeder M.J. ; Lock A.P. ; Schiemann R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 20 起始页码: 8093
结束页码: 8108
语种: 英语
英文摘要: There are some long-established biases in atmospheric models that originate from the representation of tropical convection. Previously, it has been difficult to separate cause and effect because errors are often the result of a number of interacting biases. Recently, researchers have gained the ability to run multiyear global climate model simulations with grid spacings small enough to switch the convective parameterization off, which permits the convection to develop explicitly. There are clear improvements to the initiation of convective storms and the diurnal cycle of rainfall in the convection-permitting simulations, which enables a new process-study approach to model bias identification. In this study, multiyear global atmosphere-only climate simulations with and without convective parameterization are undertaken with the Met Office Unified Model and are analyzed over the Maritime Continent region, where convergence from sea-breeze circulations is key for convection initiation. The analysis shows that, although the simulation with parameterized convection is able to reproduce the key rain-forming sea-breeze circulation, the parameterization is not able to respond realistically to the circulation. A feedback of errors also occurs: the convective parameterization causes rain to fall in the early morning, which cools and wets the boundary layer, reducing the land-sea temperature contrast and weakening the sea breeze. This is, however, an effect of the convective bias, rather than a cause of it. Improvements to how and when convection schemes trigger convection will improve both the timing and location of tropical rainfall and representation of sea-breeze circulations. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50710
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Met Office at Leeds, University of Leeds, Leeds, United Kingdom; Met Office, Exeter, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC, Australia; Centre of Excellence for Climate System Science, Monash University, Clayton, VIC, Australia; National Centre for Atmospheric Science, Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Birch C.E.,Roberts M.J.,Garcia-Carreras L.,et al. Sea-breeze dynamics and convection initiation: The influence of convective parameterization in weather and climate model biases[J]. Journal of Climate,2015-01-01,28(20)