The scale dependence and structure of convergence fields preceding the initiation of deep convection
The scale dependence and structure of convergence fields preceding the initiation of deep convection
复制标题
深对流启动前的收敛场的尺度依赖性和结构
DOI:
10.1002/2014gl060493
复制
发表时间:
2014
影响因子:
5.2
通讯作者:
Birch C
中科院分区:
文献类型:
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作者:
Birch C
Links between convergence and convection are poor in global models, and poor representation of convection is the source of many model biases in the tropics. State‐of‐the‐art convection‐permitting simulations allow us to analyze realistic convection statistically. The analysis of fractal dimension is used to show that in convection‐permitting simulations (grid spacings 1.5, 4, and 12 km) of the West African monsoon, 50% of deep convective initiations occur in the near vicinity of low‐level boundary layer convergence lines that are orientated along the mean wind. In these simulations, more than 80% of the initiations occur within large‐scale (300 × 300 km) convergence, with some 20% in large‐scale divergence, and almost all cases occur within local scale (60 × 60 km) convergence. The behavior alters in a simulation with a convection scheme and a grid spacing of 12 km; initiation is less frequent over convergence lines, and there is less dependency on high‐magnitude low‐level local convergence.
影响因子:
8.9
作者:
Birch C
通讯作者:
Birch C
影响因子:
8.9
作者:
D. Parker;R. Burton;A. Diongue‐Niang;R. Ellis;M. Felton;C. Taylor;C. Thorncroft;P. Bessemoulin;A. Tompkins
通讯作者:
A. Tompkins
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
C. Dione;M. Lothon;D. Badiane;B. Campistron;F. Couvreux;Françoise Guichard;S. Sall
通讯作者:
S. Sall