GSTDTAP  > 气候变化
DOI10.1007/s00382-018-4192-5
The roles of static stability and tropical-extratropical interactions in the summer interannual variability of the North Atlantic sector
Mbengue, Cheikh Oumar1; Woollings, Tim1; Dacre, Helen F.2; Hodges, Kevin I.2
2019-02-01
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号52页码:1299-1315
文章类型Article
语种英语
国家England
英文摘要

Summer seasonal forecast skill in the North Atlantic sector is lower than winter skill. To identify potential controls on predictability, the sensitivity of North Atlantic baroclinicity to atmospheric drivers is quantified. Using ERA-INTERIM reanalysis data, North Atlantic storm-track baroclinicity is shown to be less sensitive to meridional temperature-gradient variability in summer. Static stability shapes the sector's interannual variability by modulating the sensitivity of baroclinicity to variations in meridional temperature gradients and tropopause height and by modifying the baroclinicity itself. High static stability anomalies at upper levels result in more zonal extratropical cyclone tracks and higher eddy kinetic energy over the British Isles in the summertime. These static stability anomalies are not strongly related to the summer NAO; but they are correlated with the suppression of convection over the tropical Atlantic and with a poleward-shifted subtropical jet. These results suggest a non-local driver of North Atlantic variability. Furthermore, they imply that improved representations of convection over the south-eastern part of North America and the tropical Atlantic might improve summer seasonal forecast skill.


英文关键词Static stability Storm tracks Climate variability Tropical-extratropical interactions Summer
领域气候变化
收录类别SCI-E
WOS记录号WOS:000460902200001
WOS关键词EDDY-DRIVEN JET ; STORM-TRACK SHIFTS ; HADLEY CIRCULATION ; REGIME TRANSITIONS ; CLIMATE-CHANGE ; SIMULATIONS ; EDDIES ; ENERGY ; SENSITIVITY ; RANGE
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/35464
专题气候变化
作者单位1.Atmospher Ocean & Planetary Phys, Sherrington Rd, Oxford OX1 3PU, England;
2.Univ Reading, Dept Meteorol, Reading, Berks, England
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Mbengue, Cheikh Oumar,Woollings, Tim,Dacre, Helen F.,et al. The roles of static stability and tropical-extratropical interactions in the summer interannual variability of the North Atlantic sector[J]. CLIMATE DYNAMICS,2019,52:1299-1315.
APA Mbengue, Cheikh Oumar,Woollings, Tim,Dacre, Helen F.,&Hodges, Kevin I..(2019).The roles of static stability and tropical-extratropical interactions in the summer interannual variability of the North Atlantic sector.CLIMATE DYNAMICS,52,1299-1315.
MLA Mbengue, Cheikh Oumar,et al."The roles of static stability and tropical-extratropical interactions in the summer interannual variability of the North Atlantic sector".CLIMATE DYNAMICS 52(2019):1299-1315.
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