Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04826-w |
Re-emergence of North Atlantic subsurface ocean temperature anomalies in a seasonal forecast system | |
Grist, Jeremy P.1; Sinha, Bablu1; Hewitt, Helene. T.2; Duchez, Aurelie1; MacLachlan, Craig2; Hyder, Patrick2; Josey, Simon A.1; Hirschi, Joel J. -M.1; Blaker, Adam T.1; New, Adrian. L.1; Scaife, Adam A.2,3; Roberts, Chris D.2,4 | |
2019-10-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:4799-4820 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | A high-resolution coupled ocean atmosphere model is used to study the effects of seasonal re-emergence of North Atlantic subsurface ocean temperature anomalies on northern hemisphere winter climate. A 50-member control ensemble is integrated from 1 September 2007 to 28 February 2008 and compared with a parallel ensemble with perturbed ocean initial conditions. The perturbation consists of a density-compensated subsurface Atlantic temperature anomaly corresponding to the observed subsurface temperature anomaly for September 2010. The experiment is repeated for two atmosphere horizontal resolutions (similar to 60 km and similar to 25 km) in order to determine whether the sensitivity of the atmosphere to re-emerging temperature anomalies is dependent on resolution. A wide range of re-emergence behavior is found within the perturbed ensembles. While the observations seem to indicate that most of the re-emergence is occurring in November, most members of the ensemble show re-emergence occurring later in the winter. However, when re-emergence does occur it is preceded by an atmospheric pressure pattern that induces a strong flow of cold, dry air over the mid-latitude Atlantic, and enhances oceanic latent heat loss. In response to re-emergence (negative SST anomalies), there is reduced latent heat loss, less atmospheric convection, a reduction in eddy kinetic energy and positive low-level pressure anomalies downstream. Within the framework of a seasonal forecast system the results highlight the atmospheric conditions required for re-emergence to take place and the physical processes that may lead to a significant effect on the winter atmospheric circulation. |
英文关键词 | Seasonal forecasting Climate model Re-emergence |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000489753900059 |
WOS关键词 | MERIDIONAL OVERTURNING CIRCULATION ; SHORT-RANGE ; MODEL ; PREDICTABILITY ; PREDICTION ; RESOLUTION ; IMPACT ; FLUXES ; CONFIGURATION ; OSCILLATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187248 |
专题 | 气候变化 |
作者单位 | 1.Natl Oceanog Ctr, European Way, Southampton SO14 3ZH, Hants, England; 2.Met Off, Hadley Ctr, Fitzroy Rd, Exeter EX1 3PB, Devon, England; 3.Univ Exeter, Coll Engn Math & Phys Sci, Exeter, Devon, England; 4.European Ctr Medium Range Weather Forecasts ECMWF, Shinfield Pk, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Grist, Jeremy P.,Sinha, Bablu,Hewitt, Helene. T.,et al. Re-emergence of North Atlantic subsurface ocean temperature anomalies in a seasonal forecast system[J]. CLIMATE DYNAMICS,2019,53:4799-4820. |
APA | Grist, Jeremy P..,Sinha, Bablu.,Hewitt, Helene. T..,Duchez, Aurelie.,MacLachlan, Craig.,...&Roberts, Chris D..(2019).Re-emergence of North Atlantic subsurface ocean temperature anomalies in a seasonal forecast system.CLIMATE DYNAMICS,53,4799-4820. |
MLA | Grist, Jeremy P.,et al."Re-emergence of North Atlantic subsurface ocean temperature anomalies in a seasonal forecast system".CLIMATE DYNAMICS 53(2019):4799-4820. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论