气候变化领域集成服务门户(CCPortal): Climate windows for polynesian voyaging to New Zealand and easter Island

CCPortal

DOI	10.1073/pnas.1408918111
	Climate windows for polynesian voyaging to New Zealand and easter Island
	Goodwin I.D.; Browning S.A.; Anderson A.J.; Kirch P.V.
发表日期	2014
ISSN	0027-8424
起始页码	14716
结束页码	14721
卷号	111 期号:41
英文摘要	Debate about initial human migration across the immense area of East Polynesia has focused upon seafaring technology, both of navigation and canoe capabilities, while temporal variation in sailing conditions, notably through climate change, has received less attention. One model of Polynesian voyaging observes that as tradewind easterlies are currently dominant in the central Pacific, prehistoric colonization canoes voyaging eastward to and through central East Polynesia (CEP: Society, Tuamotu, Marquesas, Gambier, Southern Cook, and Austral Islands) and to Easter Island probably had a windward capacity. Similar arguments have been applied to voyaging from CEP to New Zealand against prevailing westerlies. An alternative view is that migration required reliable off-wind sailing routes. We investigate the marine climate and potential voyaging routes during the Medieval Climate Anomaly (MCA), A.D. 800-1300, when the initial colonization of CEP and New Zealand occurred. Paleoclimate data assimilation is used to reconstruct Pacific sea level pressure and wind field patterns at bidecadal resolution during the MCA. We argue here that changing wind field patterns associated with the MCA provided conditions in which voyaging to and from the most isolated East Polynesian islands, New Zealand, and Easter Island was readily possible by off-wind sailing. The intensification and poleward expansion of the Pacific subtropical anticyclone culminating in A.D. 1140-1260 opened an anomalous climate window for off-wind sailing routes to New Zealand from the Southern Austral Islands, the Southern Cook Islands, and Tonga/Fiji Islands.
英文关键词	Modoki La Nina; Proxy climate
语种	英语
scopus关键词	climate change; human; migration; New Zealand; Pacific Ocean; Polynesia; pressure; tropic climate; Climate Change; Emigration and Immigration; Humans; New Zealand; Pacific Ocean; Polynesia; Pressure; Tropical Climate
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159104
作者单位	Goodwin, I.D., Marine Climate Risk Group and Department of Environment and Geography, Macquarie University, Sydney, NSW 2109, Australia; Browning, S.A., Marine Climate Risk Group and Department of Environment and Geography, Macquarie University, Sydney, NSW 2109, Australia; Anderson, A.J., Research School of Asia-Pacific, Australian National University, Canberra, ACT 2001, Australia; Kirch, P.V., University of California, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Goodwin I.D.,Browning S.A.,Anderson A.J.,et al. Climate windows for polynesian voyaging to New Zealand and easter Island[J],2014,111(41).
APA	Goodwin I.D.,Browning S.A.,Anderson A.J.,&Kirch P.V..(2014).Climate windows for polynesian voyaging to New Zealand and easter Island.Proceedings of the National Academy of Sciences of the United States of America,111(41).
MLA	Goodwin I.D.,et al."Climate windows for polynesian voyaging to New Zealand and easter Island".Proceedings of the National Academy of Sciences of the United States of America 111.41(2014).