| DOI: | 10.1002/2017MS000980
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| Scopus记录号: | 2-s2.0-85020442803
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| 论文题名: | Convective aggregation in realistic convective-scale simulations |
| 作者: | Holloway C; E
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| 刊名: | Journal of Advances in Modeling Earth Systems
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| ISSN: | 19422466
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| 出版年: | 2017
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| 卷: | 9, 期:2 | | 起始页码: | 1450
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| 结束页码: | 1472
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| 语种: | 英语
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| 英文关键词: | Budget control
; Surface measurement
; Autocorrelation length
; Distribution shapes
; Interactive surfaces
; Lateral boundary conditions
; Limited area models
; Radiative-convective equilibrium
; Realistic simulation
; Self aggregation
; Radiation
; advection
; aggregation
; atmospheric convection
; atmospheric modeling
; autocorrelation
; boundary condition
; equilibrium
; evaporation
; precipitation (climatology)
; radiative forcing
; surface flux
; tropical region
; water vapor
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| 英文摘要: | To investigate the real-world relevance of idealized-model convective self-aggregation, five 15 day cases of real organized convection in the tropics are simulated. These include multiple simulations of each case to test sensitivities of the convective organization and mean states to interactive radiation, interactive surface fluxes, and evaporation of rain. These simulations are compared to self-aggregation seen in the same model configured to run in idealized radiative-convective equilibrium. Analysis of the budget of the spatial variance of column-integrated frozen moist static energy shows that control runs have significant positive contributions to organization from radiation and negative contributions from surface fluxes and transport, similar to idealized runs once they become aggregated. Despite identical lateral boundary conditions for all experiments in each case, systematic differences in mean column water vapor (CWV), CWV distribution shape, and CWV autocorrelation length scale are found between the different sensitivity runs, particularly for those without interactive radiation, showing that there are at least some similarities in sensitivities to these feedbacks in both idealized and realistic simulations (although the organization of precipitation shows less sensitivity to interactive radiation). The magnitudes and signs of these systematic differences are consistent with a rough equilibrium between (1) equalization due to advection from the lateral boundaries and (2) disaggregation due to the absence of interactive radiation, implying disaggregation rates comparable to those in idealized runs with aggregated initial conditions and noninteractive radiation. This points to a plausible similarity in the way that radiation feedbacks maintain aggregated convection in both idealized simulations and the real world. © 2017. The Authors. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75792
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| 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: | Department of Meteorology, University of Reading, Reading, United Kingdom
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| Recommended Citation: | |
Holloway C,E. Convective aggregation in realistic convective-scale simulations[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)
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