DOI: 10.1016/j.quascirev.2017.03.019
Scopus记录号: 2-s2.0-85016597182
论文题名: Timing of the southward retreat of the ITCZ at the end of the Holocene Humid Period in Southern Arabia: Data-model comparison
作者: Lézine A.-M. ; Ivory S.J. ; Braconnot P. ; Marti O.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 164 起始页码: 68
结束页码: 76
语种: 英语
英文关键词: Climate simulations
; End of the Holocene Humid Period
; IPSL model
; ITCZ
; Oman
; Pollen
Scopus关键词: Timing circuits
; Climate simulation
; Humid periods
; ITCZ
; Oman
; Pollen
; Climate models
; Rhizophoraceae
英文摘要: New pollen data from Omani mangroves (Kwar-al-Jaramah [22.49° N - 59.76° E] and Filim [20.61° N - 58.17° E]), in addition to previously published paleohydrological records from Southern Arabia improve our understanding of the timing and amplitude of the southward retreat of the Indian monsoon influence in Southern Arabia along a north-south transect. Comparison with simulations performed with the IPSL climate model, considering both snapshot experiments and transient simulations from 6000 cal yr BP to the present, confirm the latitudinally time-transgressive nature of the humid-arid transition at the end of the Holocene Humid Period. This occurred in two steps, respectively dated at around 5000 and 2700 cal yr BP. At around 5000 cal yr BP, the southward ITCZ shift was orbitally-driven and led to the abrupt aridification at Kwar-al-Jaramah and the progressive increase of dryness at Filim as the mean position of the ITCZ was centered ca 22.30°N. At 2700 cal yr BP, aridity was fully in place over all of southern Arabia due to increased climate variability. More intense rainy events during the last millennium, however, may have contributed to the discrete hydrological improvement without any impact on the regional vegetation which has remained desert to the present day. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59237
Appears in Collections: 过去全球变化的重建
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作者单位: Sorbonne Universités, UPMC, Univ Paris 06, CNRS-IRD-MNHN, LOCEAN/IPSL Laboratory, 4 place Jussieu, Paris, France; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States; Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CEA-CNRS-UVSQ – UMR8212, CE Saclay, l'Orme des Merisiers, Gif-sur-Yvette Cedex, France
Recommended Citation:
Lézine A.-M.,Ivory S.J.,Braconnot P.,et al. Timing of the southward retreat of the ITCZ at the end of the Holocene Humid Period in Southern Arabia: Data-model comparison[J]. Quaternary Science Reviews,2017-01-01,164