气候变化领域集成服务门户(CCPortal): A modified seasonal cycle during MIS31 super-interglacial favors stronger interannual ENSO and monsoon variability

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DOI	10.5194/cp-15-735-2019
	A modified seasonal cycle during MIS31 super-interglacial favors stronger interannual ENSO and monsoon variability
	Justino F.; Kucharski F.; Lindemann D.; Wilson A.; Stordal F.
发表日期	2019
ISSN	18149324
起始页码	735
结束页码	749
卷号	15 期号:2
英文摘要	It has long been recognized that the amplitude of the seasonal cycle can substantially modify climate features in distinct timescales. This study evaluates the impact of the enhanced seasonality characteristic of the Marine Isotope Stage 31 (MIS31) on the El Niño-Southern Oscillation (ENSO). Based upon coupled climate simulations driven by present-day (CTR) and MIS31 boundary conditions, we demonstrate that the CTR simulation shows a significant concentration of power in the 3-7-year band and on the multidecadal timescale between 15 and 30 years. However, the MIS31 simulation shows drastically modified temporal variability of the ENSO, with stronger power spectrum at interannual timescales but the absence of decadal periodicity. Increased meridional gradient of sea surface temperature (SST) and wind stress in the Northern Hemisphere subtropics are revealed to be the primary candidates responsible for changes in the equatorial variability. The oceanic response to the MIS31 ENSO extends to the extratropics, and fits nicely with SST anomalies delivered by paleoreconstructions. The implementation of the MIS31 conditions results in a distinct global monsoon system and its link to the ENSO in respect to current conditions. In particular, the Indian monsoon intensified but no correlation with ENSO is found in the MIS31 climate, diverging from conditions delivered by our current climate in which this monsoon is significantly correlated with the NIÑO34 index. This indicates that monsoonal precipitation for this interglacial is more closely connected to hemispherical features than to the tropical-extratropical climate interaction. . © Author(s) 2019.
语种	英语
scopus关键词	air-sea interaction; annual variation; El Nino-Southern Oscillation; extratropical environment; interglacial; marine isotope stage; monsoon; Northern Hemisphere; paleoenvironment; reconstruction; sea surface temperature; seasonal variation; seasonality; subtropical region; temporal variation
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146827
作者单位	Department of Agricultural Engineering, Universidade Federal de Vicosa, PH Rolfs, Vicosa, Brazil; Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Faculdade de Meteorologia, Universidade Federal de Pelotas, Pelotas, Brazil; Polar Meteorology Group, Byrd Polar and Climate Research Center, Ohio State University, Columbus, OH, United States; University of Oslo, Department of Geosciences, Forskningsparken Gaustadalleen, Oslo, Norway
推荐引用方式 GB/T 7714	Justino F.,Kucharski F.,Lindemann D.,et al. A modified seasonal cycle during MIS31 super-interglacial favors stronger interannual ENSO and monsoon variability[J],2019,15(2).
APA	Justino F.,Kucharski F.,Lindemann D.,Wilson A.,&Stordal F..(2019).A modified seasonal cycle during MIS31 super-interglacial favors stronger interannual ENSO and monsoon variability.Climate of the Past,15(2).
MLA	Justino F.,et al."A modified seasonal cycle during MIS31 super-interglacial favors stronger interannual ENSO and monsoon variability".Climate of the Past 15.2(2019).