DOI: 10.1016/j.quascirev.2018.12.020
Scopus记录号: 2-s2.0-85059100724
论文题名: The timing and nature of the last glacial cycle in New Zealand
作者: Shulmeister J. ; Thackray G.D. ; Rittenour T.M. ; Fink D. ; Patton N.R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 206 起始页码: 1
结束页码: 20
语种: 英语
英文关键词: CRN
; Glacial advances
; Luminescence dating
; New Zealand
; Otiran glaciation
; Paleoclimate
; Westerlies
Scopus关键词: Geochronology
; Stratigraphy
; Timing circuits
; Glacial advances
; Luminescence dating
; New zealand
; Otiran glaciation
; Paleoclimates
; Westerlies
; Glacial geology
; climate conditions
; geochronology
; glaciation
; glacier advance
; Last Glacial
; Last Glacial Maximum
; luminescence dating
; marine isotope stage
; moraine
; outcrop
; outwash
; paleoclimate
; sequence stratigraphy
; Southern Hemisphere
; westerly
; New Zealand
; North Island
; South Island
英文摘要: This paper constitutes a review of the last (Otiran) glaciation in New Zealand, spanning marine isotope stages (MIS) 4-2. We highlight the nature of glaciation, which is characterised by exceptional sedimentation, relatively mild maritime climatic conditions and the widespread presence of water associated with proglacial settings. These conditions produce glacial systems characterised by extensive outwash fans and relatively small terminal moraines. Extensive recent geochronological work allows us to recognise at least eight glacial advances during the Otiran. These occurred at 65 ± 3.25ka, 47.5 ± 3 ka, 38.5 ± 2 ka, 31.5 ± 3 ka, 26.5 ± 2 ka, 20.5 ± 2 ka, 17 ± 2 ka and 13 ± 1 ka, which we term the Otira 1 to 8 advances, respectively. Though the analytical uncertainty ranges for some of these advances overlap, all are independently distinguished through moraine morphologic relationships and/or stratigraphic relationships in outcrop. Major advances appear to be associated with climate influences such as periods of Southern Hemisphere insolation minima (65ka, and 31.5 ka advances), the last glacial maximum cooling (LGM) (20.5 ka) and periods of Antarctic cooling (13ka). The timing of greatest glacial extent in the last glacial cycle is not simultaneous across New Zealand. The MIS 4 advance was the greatest in the southern South Island, while the MIS 3/2 advances (26.5 ka) were greatest in the central South Island. In the northern South Island and the North Island, MIS 4, MIS 3/2, and the last glacial maximum appear to be equivalent in extent. We attribute these spatio-temporal variations in the timing of maximum glaciation to precipitation changes related to a northward shift in the track of the westerlies. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117392
Appears in Collections: 气候变化与战略
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Recommended Citation:
Shulmeister J.,Thackray G.D.,Rittenour T.M.,et al. The timing and nature of the last glacial cycle in New Zealand[J]. Quaternary Science Reviews,2019-01-01,206