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DOI | 10.1002/2017GL073832 |
The role of the Southern Hemisphere semiannual oscillation in the development of a precursor to central and eastern Pacific Southern Oscillation warm events | |
Meehl, Gerald A.1; van Loon, Harry1; Arblaster, Julie M.1,2 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Australia |
英文摘要 | The semiannual oscillation (SAO) is a twice-yearly northward movement (in May-June-July (MJJ) and November-December-January (NDJ)) of the circumpolar trough of sea level pressure (SLP) in the Southern Hemisphere with effects throughout the troposphere. During MJJ the second harmonic of SLP, describing the SAO, has low values of SLP north of 50 degrees S in the subtropical South Pacific, while the first harmonic, which is dominant over the Australian sector, increases to its peak. This once-a-year peak in negative SLP gradients (decreasing to the east) between Australia and the ocean to its east extends to the equatorial Pacific. Southern Oscillation warm events since 1950, with an intensification of this seasonal cycle, have larger-amplitude SST anomalies in the eastern equatorial Pacific in MJJ and during the following mature phase in NDJ. Weak amplification of the seasonal cycle in MJJ tends to be followed by larger-amplitude SST anomalies in the central equatorial Pacific during NDJ. Plain Language Summary Variations in the seasonal cycle in the Australian-Pacific region can affect where and how El Nino events develop. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400057 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; EL-NINO ; MECHANISM ; CIRCULATION ; ANOMALIES ; PRESSURE ; WAVES ; LEVEL ; WIND |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/28436 |
专题 | 气候变化 |
作者单位 | 1.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 2.Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic, Australia |
推荐引用方式 GB/T 7714 | Meehl, Gerald A.,van Loon, Harry,Arblaster, Julie M.. The role of the Southern Hemisphere semiannual oscillation in the development of a precursor to central and eastern Pacific Southern Oscillation warm events[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Meehl, Gerald A.,van Loon, Harry,&Arblaster, Julie M..(2017).The role of the Southern Hemisphere semiannual oscillation in the development of a precursor to central and eastern Pacific Southern Oscillation warm events.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Meehl, Gerald A.,et al."The role of the Southern Hemisphere semiannual oscillation in the development of a precursor to central and eastern Pacific Southern Oscillation warm events".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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