DOI: 10.5194/cp-12-595-2016
Scopus记录号: 2-s2.0-84960460402
论文题名: Optimal site selection for a high-resolution ice core record in East Antarctica
作者: Vance T.R. ; Roberts J.L. ; Moy A.D. ; Curran M.A.J. ; Tozer C.R. ; Gallant A.J.E. ; Abram N.J. ; Van Ommen T.D. ; Young D.A. ; Grima C. ; Blankenship D.D. ; Siegert M.J.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 3 起始页码: 595
结束页码: 610
语种: 英语
Scopus关键词: accumulation rate
; air temperature
; airborne survey
; coastal zone
; ice core
; mass balance
; proxy climate record
; radar
; satellite data
; site selection
; teleconnection
; Antarctica
; East Antarctica
; Enderby Land
; Indian Ocean
; Law Dome
英文摘要: Ice cores provide some of the best-dated and most comprehensive proxy records, as they yield a vast and growing array of proxy indicators. Selecting a site for ice core drilling is nonetheless challenging, as the assessment of potential new sites needs to consider a variety of factors. Here, we demonstrate a systematic approach to site selection for a new East Antarctic high-resolution ice core record. Specifically, seven criteria are considered: (1) 2000-year-old ice at 300 m depth; (2) above 1000 m elevation; (3) a minimum accumulation rate of 250 mm years-1 IE (ice equivalent); (4) minimal surface reworking to preserve the deposited climate signal; (5) a site with minimal displacement or elevation change in ice at 300 m depth; (6) a strong teleconnection to midlatitude climate; and (7) an appropriately complementary relationship to the existing Law Dome record (a high-resolution record in East Antarctica). Once assessment of these physical characteristics identified promising regions, logistical considerations (for site access and ice core retrieval) were briefly considered. We use Antarctic surface mass balance syntheses, along with ground-truthing of satellite data by airborne radar surveys to produce all-of-Antarctica maps of surface roughness, age at specified depth, elevation and displacement change, and surface air temperature correlations to pinpoint promising locations. We also use the European Centre for Medium-Range Weather Forecast ERA 20th Century reanalysis (ERA-20C) to ensure that a site complementary to the Law Dome record is selected. We find three promising sites in the Indian Ocean sector of East Antarctica in the coastal zone from Enderby Land to the Ingrid Christensen Coast (50-100° E). Although we focus on East Antarctica for a new ice core site, the methodology is more generally applicable, and we include key parameters for all of Antarctica which may be useful for ice core site selection elsewhere and/or for other purposes. © 2016 Author(s). 资助项目: G. Unger Vetlesen Foundation
; NSF, National Stroke Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49048
Appears in Collections: 气候变化与战略
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Recommended Citation:
Vance T.R.,Roberts J.L.,Moy A.D.,et al. Optimal site selection for a high-resolution ice core record in East Antarctica[J]. Climate of the Past,2016-01-01,12(3)