DOI: 10.1175/JCLI-D-13-00468.1
Scopus记录号: 2-s2.0-84900387649
论文题名: Atmospheric moisture budget and spatial resolution dependence of precipitation extremes in aquaplanet simulations
作者: Yang Q. ; Ruby Leung L. ; Rauscher S.A. ; Ringler T.D. ; Taylor M.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 10 起始页码: 3565
结束页码: 3581
语种: 英语
Scopus关键词: Budget control
; Dynamics
; Image resolution
; Moisture
; Parameterization
; Precipitation (meteorology)
; Atmospheric moisture
; Cloud parameterizations
; Community atmosphere model
; Extreme precipitation
; High-order methods
; Moisture transport
; Precipitation extremes
; Resolution dependency
; Computer simulation
; advection
; atmospheric modeling
; atmospheric moisture
; cloud microphysics
; moisture transfer
; parameterization
; precipitation intensity
; prediction
; spatial resolution
; tropical meteorology
; weather forecasting
英文摘要: This study investigates the moisture budgets and resolution dependency of precipitation extremes in an aquaplanet framework based on the Community Atmosphere Model, version 4 (CAM4). Moisture budgets from simulations using two different dynamical cores, the Model for Prediction Across Scales-Atmosphere (MPAS-A) and High Order Method Modeling Environment (HOMME), but the same physics parameterizations suggest that during precipitation extremes the intensity of precipitation is approximately balanced by the vertical advective moisture transport. The resolution dependency in extremes from simulations at their native grid resolution originates from that of vertical moisture transport, which is mainly explained by changes in dynamics (related to vertical velocity ω) with resolution. When assessed at the same grid scale by areaweighted averaging the fine-resolution simulations to the coarse grids, simulations with either dynamical core still demonstrate resolution dependency in extreme precipitation with no convergence over the tropics, but convergence occurs at a wide range of latitudes over the extratropics. The use of lower temporal frequency data (i.e., daily vs 6 hourly) reduces the resolution dependency. Although thermodynamic (moisture) changes become significant in offsetting the effect of dynamics when assessed at the same grid scale, especially over the extratropics, changes in dynamics with resolution are still large and explain most of the resolution dependency during extremes. This suggests that the effects of subgrid-scale variability of v and vertical moisture transport during extremes are not adequately parameterized by the model at coarse resolution. The aquaplanet framework and analysis described in this study provide an important metric for assessing sensitivities of cloud parameterizations to spatial resolution and dynamical cores under extreme conditions. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51112
Appears in Collections: 气候变化事实与影响
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作者单位: Pacific Northwest National Laboratory, Richland, WA, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Sandia National Laboratories, Albuquerque, NM, United States
Recommended Citation:
Yang Q.,Ruby Leung L.,Rauscher S.A.,et al. Atmospheric moisture budget and spatial resolution dependence of precipitation extremes in aquaplanet simulations[J]. Journal of Climate,2014-01-01,27(10)