| DOI: | 10.2172/1166909
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| 报告号: | DE-FG02--07ER64444_44331_A_10
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| 报告题名: | Improved atmosphere-ocean coupled modeling in the tropics for climate prediction |
| 作者: | Zhang, Minghua
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| 出版年: | 2015
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| 发表日期: | 2015-01-01
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| 总页数: | 2
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Climate models
; double ITCZ
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| 中文主题词: | 热通量
; 短波辐射
; 太阳辐射
; 蒸发
; 地面风
; 高温
; 海流
; 温跃层
|
| 主题词: | HEAT FLUX
; SHORTWAVE RADIATION
; SOLAR RADIATION
; EVAPORATION
; SURFACE WINDS
; HEAT
; OCEAN CURRENTS
; THERMOCLINE
|
| 英文摘要: | We investigated the initial development of the double ITCZ in the Community Climate System Model (CCSM Version 3) in the central Pacific. Starting from a resting initial condition of the ocean in January, the model developed a warm bias of sea-surface temperature (SST) in the central Pacific from 5oS to 10oS in the first three months. We found this initial bias to be caused by excessive surface shortwave radiation that is also present in the standalone atmospheric model. The initial bias is further amplified by biases in both surface latent heat flux and horizontal heat transport in the upper ocean. These biases are caused by the responses of surface winds to SST bias and the thermocline structure to surface wind curls. We also showed that the warming biases in surface solar radiation and latent heat fluxes are seasonally offset by cooling biases from reduced solar radiation after the austral summer due to cloud responses and in the austral fall due to enhanced evaporation when the maximum SST is closest to the equator. The warming biases from the dynamic heat transport by ocean currents however stay throughout all seasons once they are developed, which are eventually balanced by enhanced energy exchange and penetration of solar radiation below the mixed layer. Our results also showed that the equatorial cold tongue develops after the warm biases in the south central Pacific, and the overestimation of surface shortwave radiation recurs in the austral summer in each year. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1166909
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/41996
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1166909.pdf（157KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Zhang, Minghua. Improved atmosphere-ocean coupled modeling in the tropics for climate prediction. 2015-01-01.
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