Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3843-2 |
A stochastic model with a low-frequency amplification feedback for the stratospheric northern annular mode | |
Yu, Yueyue1,2; Cai, Ming3; Ren, Rongcai5,6 | |
2018-05-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:3757-3773 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | We consider three indices to measure the polar stratospheric mass and stratospheric meridional mass circulation variability: anomalies of (1) total mass in the polar stratospheric cap (60-90A degrees N, above the isentropic surface 400 K, PSM), (2) total adiabatic mass transport across 60A degrees N into the polar stratosphere cap (AMT), (3) and total diabetic mass transport across 400 K from the polar stratosphere into the troposphere below (DMT). It is confirmed that the negative stratospheric Northern Annular Mode (NAM) and PSM indices have a nearly indistinguishable temporal evolution and a similar red-noise-like spectrum with a de-correlation timescale of 4 weeks. This enables us to examine the low-frequency nature of the NAM in the framework of mass circulation, namely, . The DMT index tends to be positively correlated with the PSM with a red-noise-like spectrum, representing slow radiative cooling processes giving rise to a de-correlation timescale of 3-4 weeks. The AMT is nearly perfectly correlated with the day-to-day tendency of PSM, reflecting a robust quasi 90A degrees out-of-phase relation between the AMT and PSM at all frequency bands. Variations of vertically westward tilting of planetary waves contribute mainly to the high-frequency portion of AMT. It is the wave amplitude's slow vacillation that plays the leading role in the quasi 90A degrees out-of-phase relation between the AMT and PSM. Based on this, we put forward a linear stochastic model with a low-frequency amplification feedback from low-frequency amplitude vacillations of planetary waves to explain the amplified low-frequency response of PSM/NAM to a stochastic forcing from the westward tilting variability. |
英文关键词 | Stratospheric NAM variability Polar stratospheric mass Poleward mass transport Linear stochastic model with a low-frequency amplification feedback |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429650700035 |
WOS关键词 | COLD-AIR OUTBREAKS ; ATMOSPHERIC CIRCULATION ANOMALIES ; FINAL WARMING EVENTS ; ZONAL FLOW FEEDBACK ; INTERANNUAL VARIABILITY ; DOWNWARD PROPAGATION ; SOUTHERN-HEMISPHERE ; PART I ; CLIMATE VARIABILITY ; SEASON VARIABILITY |
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/36121 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Nanjing, Jiangsu, Peoples R China; 2.Florida State Univ, Inst Geophys Fluid Dynam, Tallahassee, FL 32306 USA; 3.Florida State Univ, Dept Earth Ocean & Atmospher Sci, 1017 Acad Way, Tallahassee, FL 32306 USA; 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China; 5.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecasts & Evaluat Meteor, Nanjing, Jiangsu, Peoples R China; 6.Nanjing Univ Informat Sci & Technol, KLME, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Yu, Yueyue,Cai, Ming,Ren, Rongcai. A stochastic model with a low-frequency amplification feedback for the stratospheric northern annular mode[J]. CLIMATE DYNAMICS,2018,50:3757-3773. |
APA | Yu, Yueyue,Cai, Ming,&Ren, Rongcai.(2018).A stochastic model with a low-frequency amplification feedback for the stratospheric northern annular mode.CLIMATE DYNAMICS,50,3757-3773. |
MLA | Yu, Yueyue,et al."A stochastic model with a low-frequency amplification feedback for the stratospheric northern annular mode".CLIMATE DYNAMICS 50(2018):3757-3773. |
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