Rossby Wave Breaking and Transient Eddy Forcing during Euro-Atlantic Circulation Regimes
Rossby Wave Breaking and Transient Eddy Forcing during Euro-Atlantic Circulation Regimes
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欧洲-大西洋环流状态下的罗斯贝波破碎和瞬态涡强迫
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Straus
中科院分区：
文献类型：
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作者：
Erik T. Swenson;D. Straus
摘要利用ERA-Interim分析了在欧洲-大西洋环流发展过程中北方冬季罗斯贝波破裂的发生以及与罗斯贝波破裂直接相关的天气瞬变涡动量和热通量的定量作用。结果与使用ECWMF与NEMO海洋模式耦合的综合预报系统模式进行的季节性再预报结果进行了比较。斯堪的纳维亚阻塞和大西洋脊的发展与反气旋破波（AWB）直接相关；然而，与之相关的瞬态涡动通量并不促进（实际上是反对）脊的生长，这一点从局地的Eliassen-Palm （EP）通量散度可以看出。显然，其他因素推动了发展，波浪破碎似乎更有助于脊的衰减。北大西洋涛动（NAO）正相的增长与西大西洋的RWB无关，但与下游的AWB密切相关。在AWB期间，赤道方向…
AbstractThe occurrence of boreal winter Rossby wave breaking (RWB) along with the quantitative role of synoptic transient eddy momentum and heat fluxes directly associated with RWB are examined during the development of Euro-Atlantic circulation regimes using ERA-Interim. Results are compared to those from seasonal reforecasts made using the Integrated Forecast System model of ECWMF coupled to the NEMO ocean model. The development of both Scandinavian blocking and the Atlantic ridge is directly coincident with anticyclonic wave breaking (AWB); however, the associated transient eddy fluxes do not contribute to (and, in fact, oppose) ridge growth, as indicated by the local Eliassen–Palm (EP) flux divergence. Evidently, other factors drive development, and it appears that wave breaking assists more with ridge decay. The growth of the North Atlantic Oscillation (NAO) in its positive phase is independent of RWB in the western Atlantic but strongly linked to AWB farther downstream. During AWB, the equatorward f...
影响因子：
3.1
作者：
Franzke, Christian;Woollings, Tim;Martius, Olivia
通讯作者：
Martius, Olivia