DOI: 10.5194/cp-9-2379-2013
Scopus记录号: 2-s2.0-84879304681
论文题名: Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)
作者: Opel T. ; Fritzsche D. ; Meyer H.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 5 起始页码: 2379
结束页码: 2389
语种: 英语
Scopus关键词: arctic environment
; atmospheric circulation
; climate variation
; cooling
; ice cap
; ice core
; paleoatmosphere
; paleoclimate
; proxy climate record
; sea ice
; twentieth century
; Arctic
; Arctic Ocean
; Barents Sea
; Kara Sea
; Krasnoyarsk [Russian Federation]
; Russian Federation
; Severnaya Zemlya
英文摘要: Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth-age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuations in the Barents and Kara seas region. Here, we present the easternmost high-resolution ice-core climate proxy records (δ18O and sodium) from the Arctic. Multi-annual AN δ18O data as near-surface airerature proxies reveal major temperature changes over the last millennium, including the absolute minimum around 1800 and the unprecedented warming to a double-peak maximum in the early 20th century. The long-term cooling trend in δ18O is related to a decline in summer insolation but also to the growth of the AN ice cap as indicated by decreasing sodium concentrations. Neither a pronounced Medieval Climate Anomaly nor a Little Ice Age are detectable in the AN δ18O record. In contrast, there is evidence of several abrupt warming and cooling events, such as in the 15th and 16th centuries, partly accompanied by corresponding changes in sodium concentrations. These abrupt changes are assumed to be related to sea-ice cover variability in the Barents and Kara seas region, which might be caused by shifts in atmospheric circulation patterns. Our results indicate a significant impact of internal climate variability on Arctic climate change in the last millennium. © Author(s) 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49358
Appears in Collections: 气候变化与战略
There are no files associated with this item.
Recommended Citation:
Opel T.,Fritzsche D.,Meyer H.. Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)[J]. Climate of the Past,2013-01-01,9(5)