GSTDTAP  > 气候变化
DOI10.1007/s00382-018-4184-5
Variability along the Atlantic water pathway in the forced Norwegian Earth System Model
Langehaug, H. R.1,2; Sando, A. B.3,4; Arthun, M.5,6; Ilicak, M.7,8,9
2019
发表期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2019
卷号52页码:1211-1230
文章类型Article
语种英语
国家Norway; Turkey
英文摘要

The growing attention on mechanisms that can provide predictability on interannual-to-decadal time scales, makes it necessary to identify how well climate models represent such mechanisms. In this study we use a high (0.25 degrees horizontal grid) and a medium (1 degrees) resolution version of a forced global ocean-sea ice model, utilising the Norwegian Earth System Model, to assess the impact of increased ocean resolution. Our target is the simulation of temperature and salinity anomalies along the pathway of warm Atlantic water in the subpolar North Atlantic and the Nordic Seas. Although the high resolution version has larger biases in general at the ocean surface, the poleward propagation of thermohaline anomalies is better resolved in this version, i.e., the time for an anomaly to travel northward is more similar to observation based estimates. The extent of these anomalies can be rather large in both model versions, as also seen in observations, e.g., stretching from Scotland to northern Norway. The easternmost branch into the Nordic and Barents Seas, carrying warm Atlantic water, is also improved by higher resolution, both in terms of mean heat transport and variability in thermohaline properties. A more detailed assessment of the link between the North Atlantic Ocean circulation and the thermohaline anomalies at the entrance of the Nordic Seas reveals that the high resolution is more consistent with mechanisms that are previously published. This suggests better dynamics and variability in the subpolar region and the Nordic Seas in the high resolution compared to the medium resolution. This is most likely due a better representation of the mean circulation in the studied region when using higher resolution. As the poleward propagation of ocean heat anomalies is considered to be a key source of climate predictability, we recommend that similar methodology presented herein should be performed on coupled climate models that are used for climate prediction.


英文关键词Thermohaline anomalies Atlantic water Subpolar North Atlantic Nordic Seas Subpolar Gyre NorESM
领域气候变化
收录类别SCI-E
WOS记录号WOS:000460619200067
WOS关键词NORTH-ATLANTIC ; NORDIC SEAS ; TEMPERATURE ANOMALIES ; CLIMATE VARIABILITY ; SUBPOLAR GYRE ; HEAT-FLUX ; PART I ; CIRCULATION ; TRANSPORT ; SIMULATIONS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
被引频次:12[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/36026
专题气候变化
作者单位1.Nansen Environm & Remote Sensing Ctr, Thormohlensgate 47, N-5006 Bergen, Norway;
2.Bjerknes Ctr Climate Res, Thormohlensgate 47, N-5006 Bergen, Norway;
3.Inst Marine Res, POB 1870, N-5831 Bergen, Norway;
4.Bjerknes Ctr Climate Res, POB 1870, N-5831 Bergen, Norway;
5.Univ Bergen, Inst Geophys, Allegaten 70, N-5007 Bergen, Norway;
6.Bjerknes Ctr Climate Res, Allegaten 70, N-5007 Bergen, Norway;
7.Uni Res Climate, Allegaten 55, N-5007 Bergen, Norway;
8.Bjerknes Ctr Climate Res, Allegaten 55, N-5007 Bergen, Norway;
9.Istanbul Tech Univ, Eurasia Inst Earth Sci, Istanbul, Turkey
推荐引用方式
GB/T 7714
Langehaug, H. R.,Sando, A. B.,Arthun, M.,et al. Variability along the Atlantic water pathway in the forced Norwegian Earth System Model[J]. CLIMATE DYNAMICS,2019,52:1211-1230.
APA Langehaug, H. R.,Sando, A. B.,Arthun, M.,&Ilicak, M..(2019).Variability along the Atlantic water pathway in the forced Norwegian Earth System Model.CLIMATE DYNAMICS,52,1211-1230.
MLA Langehaug, H. R.,et al."Variability along the Atlantic water pathway in the forced Norwegian Earth System Model".CLIMATE DYNAMICS 52(2019):1211-1230.
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