On the Radiative and Dynamical Feedbacks over the Equatorial Pacific Cold Tongue
On the Radiative and Dynamical Feedbacks over the Equatorial Pacific Cold Tongue
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DOI：
10.1175/2786.1
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发表时间：
2003-07
影响因子：
4.9
通讯作者：
De-Zheng Sun;J. Fasullo;Tao Zhang;A. Roubicek
中科院分区：
文献类型：
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作者：
De-Zheng Sun;J. Fasullo;Tao Zhang;A. Roubicek
本文分析了NCAR社区气候模式第3版(CCM3)对赤道太平洋冷舌的气候反馈。利用基本海温的年际信号，利用NCAR CCM3的观测和输出计算了辐射和动力反馈。结果表明，模式中水汽温室效应的正反馈与观测值基本一致。模式中大气输送的动力反馈也与观测值相当。但模式中太阳强迫云的负反馈明显弱于观测值，而云的温室效应的正反馈明显大于观测值。因此，赤道冷舌区CCM3的大气净反馈为强正反馈(5.1Wm−2K−1)，而实际大气的大气净反馈为强负反馈(−6.4Wm−2K−1)。毛皮..。
Abstract An analysis of the climatic feedbacks in the NCAR Community Climate Model, version 3 (CCM3) over the equatorial Pacific cold tongue is presented. Using interannual signals in the underlying SST, the radiative and dynamical feedbacks have been calculated using both observations and outputs from the NCAR CCM3. The results show that the positive feedback from the greenhouse effect of water vapor in the model largely agrees with that from observations. The dynamical feedback from the atmospheric transport in the model is also comparable to that from observations. However, the negative feedback from the solar forcing of clouds in the model is significantly weaker than the observed, while the positive feedback from the greenhouse effect of clouds is significantly larger. Consequently, the net atmospheric feedback in the CCM3 over the equatorial cold tongue region is strongly positive (5.1 W m−2 K−1), while the net atmospheric feedback in the real atmosphere is strongly negative (−6.4 W m−2 K−1). A furt...