DOI: 10.1002/2014MS000417
Scopus记录号: 2-s2.0-85027921791
论文题名: A strategy for representing the effects of convective momentum transport in multiscale models: Evaluation using a new superparameterized version of the Weather Research and Forecast model (SP-WRF)
作者: Tulich S ; N
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 2 起始页码: 938
结束页码: 962
语种: 英语
英文关键词: Balloons
; Momentum
; Momentum transfer
; Pressure gradient
; Storms
; Tropics
; Induced pressure gradient
; Mesoscale Convective System
; Momentum transports
; Multi-scale Modeling
; Pressure gradient force
; Superparameterization
; Tropical climates
; Weather Research and Forecast models
; Weather forecasting
; atmospheric convection
; atmospheric modeling
; cumulus
; mesoscale meteorology
; momentum transfer
; parameterization
; pressure gradient
; squall line
; tropical cyclone
; two-dimensional modeling
; weather forecasting
英文摘要: This paper describes a general method for the treatment of convective momentum transport (CMT) in large-scale dynamical solvers that use a cyclic, two-dimensional (2-D) cloud-resolving model (CRM) as a "superparameterization" of convective-system-scale processes. The approach is similar in concept to traditional parameterizations of CMT, but with the distinction that both the scalar transport and diagnostic pressure gradient force are calculated using information provided by the 2-D CRM. No assumptions are therefore made concerning the role of convection-induced pressure gradient forces in producing up or down-gradient CMT. The proposed method is evaluated using a new superparameterized version of the Weather Research and Forecast model (SP-WRF) that is described herein for the first time. Results show that the net effect of the formulation is to modestly reduce the overall strength of the large-scale circulation, via "cumulus friction." This statement holds true for idealized simulations of two types of mesoscale convective systems, a squall line, and a tropical cyclone, in addition to real-world global simulations of seasonal (1 June to 31 August) climate. In the case of the latter, inclusion of the formulation is found to improve the depiction of key synoptic modes of tropical wave variability, in addition to some aspects of the simulated time-mean climate. The choice of CRM orientation is also found to importantly affect the simulated time-mean climate, apparently due to changes in the explicit representation of wide-spread shallow convective regions. © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76055
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: CIRES, University of Colorado, Boulder, CO, United States; Physical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Tulich S,N. A strategy for representing the effects of convective momentum transport in multiscale models: Evaluation using a new superparameterized version of the Weather Research and Forecast model (SP-WRF)[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)