Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3149-9 |
Does vertical temperature gradient of the atmosphere matter for El Nio development? | |
Hu, Zeng-Zhen1; Huang, Bohua2,3; Tseng, Yu-heng4; Wang, Wanqiu1; Kumar, Arun1; Zhu, Jieshun1,5; Jha, Bhaskar1,5 | |
2017-03-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In this work, we examine the connection of vertical temperature gradient of the tropospheric atmosphere along the equator with El Nio-Southern Oscillation (ENSO) and the possible impact of the long-term change of the gradient. It is suggested that when the temperature anomalies in the lower troposphere are relatively warmer (cooler) than in the upper troposphere, the atmosphere is less (more) stable and favors an El Nio (a La Nia) event to develop. ENSO evolutions in 1997-1998 and 2014-2015 events are good examples of this relationship. They started from similar ocean anomaly states in the springs of 1997 and 2014, but developed into an extreme El Nio in 1997-1998 and a borderline El Nio in 2014-2015. That may be partially due to differences in the evolutions of the vertical temperature anomaly gradient in troposphere. Thus, in addition to the significant atmospheric response to ENSO, the preconditioning of vertical gradient of the tropospheric temperature due to internal atmospheric processes to some extent may play an active role in affecting ENSO evolution. The long-term trend with more pronounced warming in the upper troposphere than in the lower troposphere causes a reduction in the vertical temperature gradient in the troposphere. Moreover, unlike almost homogenous warm anomalies in the upper troposphere, the lower troposphere shows remarkable regional features along the equator during 1979-2014, with cold anomaly trends over the central and eastern Pacific Ocean associated with the so-called hiatus and some warm anomalies on its two sides in the east and west. This vertical and zonal distribution of the air temperature trends in the troposphere over the Pacific Ocean is consistent with the convection suppression over the central Pacific since 2000, implying a weakening of atmosphere and ocean coupling. |
英文关键词 | El Nino-Southern Oscillation Vertical gradient of atmospheric temperature Tropical convection Long-term trend |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395060900002 |
WOS关键词 | CLIMATE FORECAST SYSTEM ; TROPICAL TROPOSPHERIC TEMPERATURE ; EQUATORIAL PACIFIC ; SURFACE-TEMPERATURE ; PREDICTION SKILL ; VICTORIA MODE ; VERSION 2 ; ENSO ; VARIABILITY ; NINO |
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/36556 |
专题 | 气候变化 |
作者单位 | 1.NCEP NWS NOAA, Climate Predict Ctr, 5830 Univ Res Court, College Pk, MD 20740 USA; 2.George Mason Univ, Dept Atmospher Ocean & Earth Sci, Coll Sci, 4400 Univ Dr, Fairfax, VA 22030 USA; 3.Ctr Ocean Land Atmosphere Studies, 270 Res Hall,Mail Stop 6C5,4400 Univ Dr, Fairfax, VA 22030 USA; 4.Natl Ctr Atmospher Res, Climate & Global Dynam Div, POB 3000, Boulder, CO 80307 USA; 5.Innovim, Greenbelt, MD USA |
推荐引用方式 GB/T 7714 | Hu, Zeng-Zhen,Huang, Bohua,Tseng, Yu-heng,et al. Does vertical temperature gradient of the atmosphere matter for El Nio development?[J]. CLIMATE DYNAMICS,2017,48. |
APA | Hu, Zeng-Zhen.,Huang, Bohua.,Tseng, Yu-heng.,Wang, Wanqiu.,Kumar, Arun.,...&Jha, Bhaskar.(2017).Does vertical temperature gradient of the atmosphere matter for El Nio development?.CLIMATE DYNAMICS,48. |
MLA | Hu, Zeng-Zhen,et al."Does vertical temperature gradient of the atmosphere matter for El Nio development?".CLIMATE DYNAMICS 48(2017). |
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