Towards a physical understanding of stratospheric cooling under global warming through a process-based decomposition method

被引:2
作者
Yang, Yang [1 ,2 ]
Ren, R. -C. [1 ]
Cai, Ming [3 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, POB 9804, Beijing 100029, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA
基金
中国国家自然科学基金;
关键词
Stratospheric cooling; Global warming; Processes-based decomposition; CFRAM; INDIVIDUAL FEEDBACK PROCESSES; CLIMATE SYSTEM MODEL; TEMPERATURE TRENDS; PART I; CIRCULATION; CMIP5; ATMOSPHERE; FRAMEWORK; BIASES;
D O I
10.1007/s00382-016-3040-8
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The stratosphere has been cooling under global warming, the causes of which are not yet well understood. This study applied a process-based decomposition method (CFRAM; Coupled Surface-Atmosphere Climate Feedback Response Analysis Method) to the simulation results of a Coupled Model Intercomparison Project, phase 5 (CMIP5) model (CCSM4; Community Climate System Model, version 4), to demonstrate the responsible radiative and non-radiative processes involved in the stratospheric cooling. By focusing on the long-term stratospheric temperature changes between the "historical run" and the 8.5 W m(-2) Representative Concentration Pathway (RCP8.5) scenario, this study demonstrates that the changes of radiative radiation due to CO2, ozone and water vapor are the main divers of stratospheric cooling in both winter and summer. They contribute to the cooling changes by reducing the net radiative energy (mainly downward radiation) received by the stratospheric layer. In terms of the global average, their contributions are around -5, -1.5, and -1 K, respectively. However, the observed stratospheric cooling is much weaker than the cooling by radiative processes. It is because changes in atmospheric dynamic processes act to strongly mitigate the radiative cooling by yielding a roughly 4 K warming on the global average base. In particular, the much stronger/weaker dynamic warming in the northern/southern winter extratropics is associated with an increase of the planetary-wave activity in the northern winter, but a slight decrease in the southern winter hemisphere, under global warming. More importantly, although radiative processes dominate the stratospheric cooling, the spatial patterns are largely determined by the non-radiative effects of dynamic processes.
引用
收藏
页码:3767 / 3782
页数:16
相关论文
共 42 条
[1]  
Andrews D., 1987, INT GEOPHYS
[2]   Simulations of anthropogenic change in the strength of the Brewer-Dobson circulation [J].
Butchart, N. ;
Scaife, A. A. ;
Bourqui, M. ;
de Grandpre, J. ;
Hare, S. H. E. ;
Kettleborough, J. ;
Langematz, U. ;
Manzini, E. ;
Sassi, F. ;
Shibata, K. ;
Shindell, D. ;
Sigmond, M. .
CLIMATE DYNAMICS, 2006, 27 (7-8) :727-741
[3]   Meridional and downward propagation of atmospheric circulation anomalies. Part I: Northern Hemisphere cold season variability [J].
Cai, Ming ;
Ren, R-C. .
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2007, 64 (06) :1880-1901
[4]   Robustness of Dynamical Feedbacks from Radiative Forcing: 2% Solar versus 2 x CO2 Experiments in an Idealized GCM [J].
Cai, Ming ;
Tung, Ka-Kit .
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2012, 69 (07) :2256-2271
[5]   A new framework for isolating individual feedback processes in coupled general circulation climate models. Part II: Method demonstrations and comparisons [J].
Cai, Ming ;
Lu, Jianhua .
CLIMATE DYNAMICS, 2009, 32 (06) :887-900
[6]   Stratospheric variability and trends in models used for the IPCC AR4 [J].
Cordero, E. C. ;
Forster, P. M. de F. .
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2006, 6 :5369-5380
[7]   The CCSM4 Ocean Component [J].
Danabasoglu, Gokhan ;
Bates, Susan C. ;
Briegleb, Bruce P. ;
Jayne, Steven R. ;
Jochum, Markus ;
Large, William G. ;
Peacock, Synte ;
Yeager, Steve G. .
JOURNAL OF CLIMATE, 2012, 25 (05) :1361-1389
[8]   Radiative and Dynamical Forcing of the Surface and Atmospheric Temperature Anomalies Associated with the Northern Annular Mode [J].
Deng, Yi ;
Park, Tae-Won ;
Cai, Ming .
JOURNAL OF CLIMATE, 2013, 26 (14) :5124-5138
[9]   Process-Based Decomposition of the Global Surface Temperature Response to El Nino in Boreal Winter [J].
Deng, Yi ;
Park, Tae-Won ;
Cai, Ming .
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2012, 69 (05) :1706-1712
[10]   Assessment of temperature, trace species, and ozone in chemistry-climate model simulations of the recent past [J].
Eyring, V. ;
Butchart, N. ;
Waugh, D. W. ;
Akiyoshi, H. ;
Austin, J. ;
Bekki, S. ;
Bodeker, G. E. ;
Boville, B. A. ;
Bruehl, C. ;
Chipperfield, M. P. ;
Cordero, E. ;
Dameris, M. ;
Deushi, M. ;
Fioletov, V. E. ;
Frith, S. M. ;
Garcia, R. R. ;
Gettelman, A. ;
Giorgetta, M. A. ;
Grewe, V. ;
Jourdain, L. ;
Kinnison, D. E. ;
Mancini, E. ;
Manzini, E. ;
Marchand, M. ;
Marsh, D. R. ;
Nagashima, T. ;
Newman, P. A. ;
Nielsen, J. E. ;
Pawson, S. ;
Pitari, G. ;
Plummer, D. A. ;
Rozanov, E. ;
Schraner, M. ;
Shepherd, T. G. ;
Shibata, K. ;
Stolarski, R. S. ;
Struthers, H. ;
Tian, W. ;
Yoshiki, M. .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2006, 111 (D22)