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DOI | 10.1007/s00382-017-3954-9 |
Comparison of the effect of land-sea thermal contrast on interdecadal variations in winter and summer blockings | |
He, Yongli1; Huang, Jianping1; Li, Dongdong1; Xie, Yongkun1,2; Zhang, Guolong1; Qi, Yulei3; Wang, Shanshan4,5; Totz, Sonja6 | |
2018-08-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51期号:4页码:1275-1294 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Germany |
英文摘要 | The influence of winter and summer land-sea surface thermal contrast on blocking for 1948-2013 is investigated using observations and the coupled model intercomparison project outputs. The land-sea index (LSI) is defined to measure the changes of zonal asymmetric thermal forcing under global warming. The summer LSI shows a slower increasing trend than winter during this period. For the positive of summer LSI, the EP flux convergence induced by the land-sea thermal forcing in the high latitude becomes weaker than normal, which induces positive anomaly of zonal-mean westerly and double-jet structure. Based on the quasiresonance amplification mechanism, the narrow and reduced westerly tunnel between two jet centers provides a favor environment for more frequent blocking. Composite analysis demonstrates that summer blocking shows an increasing trend of event numbers and a decreasing trend of durations. The numbers of the short-lived blocking persisting for 5-9 days significantly increases and the numbers of the long-lived blocking persisting for longer than 10 days has a weak increase than that in negative phase of summer LSI. The increasing transient wave activities induced by summer LSI is responsible for the decreasing duration of blockings. The increasing blocking due to summer LSI can further strengthen the continent warming and increase the summer LSI, which forms a positive feedback. The opposite dynamical effect of LSI on summer and winter blocking are discussed and found that the LSI-blocking negative feedback partially reduces the influence of the above positive feedback and induce the weak summer warming rate. |
英文关键词 | Land-sea thermal contrast Blocking Asymmetric warming Double-jet |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439440200001 |
WOS关键词 | PART I ; ATMOSPHERIC CIRCULATION ; SURFACE TEMPERATURE ; WARMING CONTRAST ; NORTH-ATLANTIC ; EAST-ASIA ; DYNAMICS ; ICE ; WAVES ; AMPLIFICATION |
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/36277 |
专题 | 气候变化 |
作者单位 | 1.Lanzhou Univ, Key Lab Semiarid Climate Change, Coll Atmospher Sci, Minist Educ, Lanzhou 73000, Gansu, Peoples R China; 2.Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Inst Atmospher Phys, Beijing, Peoples R China; 3.Chengdu Univ Informat Technol, Sch Atmospher Sci, Chengdu, Sichuan, Peoples R China; 4.Inst Arid Meteorol CMA, Key Lab Arid Climate Change & Reducing Disaster G, Lanzhou, Gansu, Peoples R China; 5.Inst Arid Meteorol CMA, Key Open Lab Arid Climate Change & Disaster Reduc, Lanzhou, Gansu, Peoples R China; 6.Univ Potsdam, Dept Phys, Potsdam, Germany |
推荐引用方式 GB/T 7714 | He, Yongli,Huang, Jianping,Li, Dongdong,et al. Comparison of the effect of land-sea thermal contrast on interdecadal variations in winter and summer blockings[J]. CLIMATE DYNAMICS,2018,51(4):1275-1294. |
APA | He, Yongli.,Huang, Jianping.,Li, Dongdong.,Xie, Yongkun.,Zhang, Guolong.,...&Totz, Sonja.(2018).Comparison of the effect of land-sea thermal contrast on interdecadal variations in winter and summer blockings.CLIMATE DYNAMICS,51(4),1275-1294. |
MLA | He, Yongli,et al."Comparison of the effect of land-sea thermal contrast on interdecadal variations in winter and summer blockings".CLIMATE DYNAMICS 51.4(2018):1275-1294. |
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