The Relationship Between Cloud Radiative Effect and Surface Temperature Variability at El Niño‐Southern Oscillation Frequencies in CMIP5 Models
The Relationship Between Cloud Radiative Effect and Surface Temperature Variability at El Niño‐Southern Oscillation Frequencies in CMIP5 Models
复制标题
CMIP5模式中厄尔尼诺-南方涛动频率云辐射效应与地表温度变化的关系
DOI：
10.1029/2018gl079236
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发表时间：
2018
影响因子：
5.2
通讯作者：
N. Lutsko
中科院分区：
文献类型：
--
作者：
N. Lutsko
利用第五次气候模式比较项目（CMIP 5）的工业化前控制模拟，研究了厄尔尼诺-南方涛动（ENSO）时间尺度上热带云辐射效应（CRE）和热带地表温度变率之间的关系。热带CRE是根据对流层中层垂直速度分组，然后回归频率空间与热带平均表面温度。低云在云和地面温度变率之间的关系中起着主导作用，通过短波CRE的热驱动变化放大ENSO引起的地面温度异常。由大尺度动力学变化驱动的CRE变化对表面温度变化的影响很小。结果表明，在ENSO频率下，中等沉降区和弱上升区的CRE与热带平均地表温度的回归系数与模式的气候敏感性有很好的相关性，构成了对气候敏感性的潜在紧急约束。
The relationship between the tropical cloud radiative effect (CRE) and tropical surface temperature variability on El Niño–Southern Oscillation (ENSO) time scales is investigated in preindustrial control simulations from the fifth Climate Model Intercomparison Project (CMIP5) archive. The tropical CRE is binned according to midtropospheric vertical velocities and then regressed in frequency space versus tropical mean surface temperatures. Low clouds play a leading role in the relationship between clouds and surface temperature variability, amplifying ENSO‐induced surface temperature anomalies through thermodynamically driven changes in the shortwave CRE. Changes in CRE driven by changes in the large‐scale dynamics have a minor influence on surface temperature variability. It is shown that the regression coefficients at ENSO frequencies between the CRE in regions of moderate subsidence and of weak ascent, and tropical mean surface temperatures are well correlated with models' climate sensitivities, constituting a potential emergent constraint on climate sensitivity.
表面温度随机变化和辐射不平衡的辐射反馈
影响因子：
5.2
作者：
Proistosescu, Cristian;Donohoe, Aaron;Armour, Kyle C.;Roe, Gerard H.;Stuecker, Malte F.;Bitz, Cecilia M.
通讯作者：
Bitz, Cecilia M.
影响因子：
4.9
作者：
Lloyd, James;Guilyardi, Eric;Weller, Hilary
通讯作者：
Weller, Hilary