DOI: 10.1007/s00382-012-1391-3
Scopus记录号: 2-s2.0-84871924261
论文题名: On atmospheric radiative feedbacks associated with climate variability and change
作者: Colman R.A. ; Hanson L.I.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-01-02 起始页码: 475
结束页码: 492
语种: 英语
英文关键词: Climate change
; Climate variability
; Feedbacks
; General circulation models
英文摘要: Using the method of radiative 'kernels' an analysis is made of water vapour, lapse rate and 'Planck' (uniform vertical temperature) long wave feedbacks in models participating in the World Climate Research Program (WCRP) Coupled Model Intercomparison Project phase 3 (CMIP3). Feedbacks are calculated at climate change timescales from the A1B scenario, and at three 'variability' timescales from the corresponding preindustrial experiments: seasonal, interannual and decadal. Surface temperature responses show different meridional patterns for the different timescales, which are then manifest in the structures of the individual feedbacks. Despite these differences, mean water vapour feedback strength in models is positive for all models and timescales, and of comparable global magnitude across all timescales except for seasonal, where it is much weaker. Taking into consideration the strong positive lapse rate feedback at seasonal timescales, combined water vapour/lapse rate feedback is indeed similar across all timescales. To a good approximation, global water vapour feedback is found to be well represented by the temperature response along with an assumption of unchanged relative humidity under both variability and climate change. A comparison is also made of model feedbacks with reanalysis derived feedbacks for seasonal and interannual timescales. No strong relationships between individual modelled feedbacks at different timescales are evident: i. e., strong feedbacks in models at variability timescales do not in general predict strong climate change feedback, with the possible exception of seasonal timescales. There are caveats on this (and other) findings however, from uncertainties associated with the kernel technique and from, at times, very large uncertainties in estimating variability related feedbacks from temperature regressions. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55044
Appears in Collections: 过去全球变化的重建
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作者单位: Centre for Australian Weather and Climate Research, Bureau of Meteorology, GPO Box 1289, Melbourne, VIC, 3001, Australia
Recommended Citation:
Colman R.A.,Hanson L.I.. On atmospheric radiative feedbacks associated with climate variability and change[J]. Climate Dynamics,2013-01-01,40(2017-01-02)