DOI: 10.1016/j.quascirev.2015.01.028
Scopus记录号: 2-s2.0-84923933983
论文题名: Holocene variations of thermocline conditions in the eastern tropical Indian Ocean
作者: Kwiatkowski C. ; Prange M. ; Varma V. ; Steinke S. ; Hebbeln D. ; Mohtadi M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 114 起始页码: 33
结束页码: 42
语种: 英语
英文关键词: Holocene
; Indian Ocean
; Indian Ocean Dipole
; Mg/Ca
; Planktic foraminifera
; Sumatra
; Thermocline
Scopus关键词: Atmospheric pressure
; Climate models
; Climatology
; Ocean structures
; Stream flow
; Temperature distribution
; Holocenes
; Indian ocean
; Indian Ocean dipole
; Planktic foraminifera
; Sumatra
; Oceanography
; climate forcing
; climate modeling
; climate variation
; Holocene
; thermocline
; timescale
; upwelling
; Greater Sunda Islands
; Indian Ocean
; Indian Ocean (Tropical)
; Sumatra
; Sunda Isles
; Foraminifera
英文摘要: Climate phenomena like the monsoon system, El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) are interconnected via various feedback mechanisms and control the climate of the Indian Ocean and its surrounding continents on various timescales. The eastern tropical Indian Ocean is a key area for the interplay of these phenomena and for reconstructing their past changes and forcing mechanisms. Here we present records of upper ocean thermal gradient, thermocline temperatures (TT) and relative abundances of planktic foraminifera in core SO 189-39KL taken off western Sumatra (0°47.400' S, 99°54.510' E) for the last 8. ka that we use as proxies for changes in upper ocean structure. The records suggest a deeper thermocline between 8. ka and ca3. ka compared to the late Holocene. We find a shoaling of the thermocline after 3. ka, most likely indicating an increased occurrence of upwelling during the late Holocene compared to the mid-Holocene which might represent changes in the IOD-like mean state of the Indian Ocean with a more negative IOD-like mean state during the mid-Holocene and a more positive IOD-like mean state during the past 3. ka. This interpretation is supported by a transient Holocene climate model simulation in which an IOD-like mode is identified that involves an insolation-forced long-term trend of increasing anomalous surface easterlies over the equatorial eastern Indian Ocean. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59967
Appears in Collections: 过去全球变化的重建
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作者单位: MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Dept. of Meteorology, Stockholm University, Stockholm, Sweden
Recommended Citation:
Kwiatkowski C.,Prange M.,Varma V.,et al. Holocene variations of thermocline conditions in the eastern tropical Indian Ocean[J]. Quaternary Science Reviews,2015-01-01,114