globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo1936
论文题名:
A weak El Niño/Southern Oscillation with delayed seasonal growth around 4,300 years ago
作者: McGregor H.V.; Fischer M.J.; Gagan M.K.; Fink D.; Phipps S.J.; Wong H.; Woodroffe C.D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期:11
起始页码: 949
结束页码: 953
语种: 英语
Scopus关键词: annual cycle ; atoll ; climate forcing ; climate modeling ; climate variation ; coral ; decadal variation ; El Nino-Southern Oscillation ; Holocene ; insolation ; paleoceanography ; paleoclimate ; sea surface temperature ; seasonality ; zonal wind ; Christmas Island ; Kiribati ; Kiritimati ; Line Islands ; Anthozoa ; Porites
英文摘要: Earth's interannual climate variability is dominated by El Niño/Southern Oscillation (ENSO). Palaeoclimate records indicate a lower ENSO variance during the middle Holocene compared with today; however, model simulations have not reproduced the full magnitude of the changes, and whether external forcing drives large intrinsic ENSO variability is therefore a matter of considerable debate. Here we present a 175-year-long, monthly resolved oxygen isotope record, obtained from a Porites coral microatoll located on Kiritimati (Christmas) Island, in the NINO3.4 region of the central equatorial Pacific. Our quantitative record of ENSO variability about 4,300 years ago shows that ENSO variance was persistently reduced by 79%, compared with today, and it exhibits a dominant annual cycle. Season-specific analysis shows that El Niño events were damped during their September-November growth phase, and delayed relative to the climatological year. We suggest that the higher boreal summer insolation at the time strengthened the tropical Pacific zonal winds as well as the gradients in sea surface temperature, and thereby led to an enhanced annual cycle and suppressed ENSO. As the weak ENSO is subject to interdecadal amplitude modulation, we conclude that amplitude modulation is likely to remain robust under altered climates. Our findings show that ENSO is capable of responding to external forcing.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106665
Appears in Collections:气候减缓与适应
科学计划与规划

Files in This Item:

There are no files associated with this item.


作者单位: School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia; Institute for Environmental Research, Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia; Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia; Climate Change Research Centre, ARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, NSW 2052, Australia

Recommended Citation:
McGregor H.V.,Fischer M.J.,Gagan M.K.,et al. A weak El Niño/Southern Oscillation with delayed seasonal growth around 4,300 years ago[J]. Nature Geoscience,2013-01-01,6(11)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[McGregor H.V.]'s Articles
[Fischer M.J.]'s Articles
[Gagan M.K.]'s Articles
百度学术
Similar articles in Baidu Scholar
[McGregor H.V.]'s Articles
[Fischer M.J.]'s Articles
[Gagan M.K.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[McGregor H.V.]‘s Articles
[Fischer M.J.]‘s Articles
[Gagan M.K.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.