DOI: 10.5194/tc-10-961-2016
Scopus记录号: 2-s2.0-84969834420
论文题名: A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: A case study on Lomonosovfonna, Svalbard
作者: Vega C ; P ; , Pohjola V ; A ; , Beaudon E ; , Claremar B ; , Van Pelt W ; J ; J ; , Pettersson R ; , Isaksson E ; , Martma T ; , Schwikowski M ; , Bøggild C ; E
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 3 起始页码: 961
结束页码: 976
语种: 英语
英文关键词: calcium
; climate signal
; estimation method
; geological record
; ice core
; ice field
; ion
; magnesium
; meltwater
; nitric oxide
; percolation
; periodicity
; physicochemical property
; potassium
; relocation
; snow accumulation
; snowpack
; sodium
; sulfur dioxide
; Arctic
; Lomonosovfonna
; Spitsbergen
; Svalbard
; Svalbard and Jan Mayen
英文摘要: Physical and chemical properties of four different ice cores (LF-97, LF-08, LF-09 and LF-11) drilled at Lomonosovfonna, Svalbard, were compared to investigate the effects of meltwater percolation on the chemical and physical stratigraphy of these records. A synthetic ice core approach was employed as reference record to estimate the ionic relocation and meltwater percolation length at this site during the period 2007-2010. Using this method, a partial ion elution sequence obtained for Lomonosovfonna was NO3 - gt; SO4 2-, Mg2+, Cl-, K+, Na+ with nitrate being the most mobile within the snowpack. The relocation length of most of the ions was on the order of 1 m during this period. In addition, by using both a positive degree day (PDD) and a snow-energy model approaches to estimate the percentage of melt at Lomonosovfonna, we have calculated a melt percentage (MP) of the total annual accumulation within the range between 48 and 70 %, for the period between 2007 and 2010, which is above the MP range suggested by the ion relocation evidenced in the LF-syn core (i.e., MP = 30%). Using a firn-densification model to constrain the melt range, a MP of 30% was found over the same period, which is consistent with the results of the synthetic ice core approach, and a 45% of melt for the last 60 years. Considering the ionic relocation lengths and annual melt percentages, we estimate that the atmospheric ionic signal remains preserved in recently drilled Lomonosovfonna ice cores at an annual or bi-annual resolution when weather conditions were similar to those during the 2007-2010 period. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75147
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, Sweden; Arctic Centre, University of Lapland, Rovaniemi, Finland; Norwegian Polar Institute, Fram Centre, Tromsø, Norway; Institute of Geology, Tallinn University of Technology, Tallinn, Estonia; Paul Scherrer Institute, Villigen PSI, Switzerland; University Centre in Svalbard, UNIS, Pb. 156 9171, Longyearbyen, Norway; Byrd Polar and Climate Research Center, 082A Scott Hall, 1090 Carmack Road, Columbus, OH, United States; Arctic Technology Centre, Technical University of Denmark, Kemitorvet, Bygning 204, Kgs. Lyngby, Denmark
Recommended Citation:
Vega C,P,, Pohjola V,et al. A synthetic ice core approach to estimate ion relocation in an ice field site experiencing periodical melt: A case study on Lomonosovfonna, Svalbard[J]. Cryosphere,2016-01-01,10(3)