DOI: 10.1002/2017JC013524
Scopus记录号: 2-s2.0-85045918872
论文题名: Water Mass Classification on a Highly Variable Arctic Shelf Region: Origin of Laptev Sea Water Masses and Implications for the Nutrient Budget
作者: Bauch D. ; Cherniavskaia E.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 1896
结束页码: 1906
语种: 英语
英文关键词: Arctic Halocline
; Arctic Ocean
; principal component analysis
; Siberian shelves
; stable oxygen isotopes
; water masses
Scopus关键词: annual variation
; halocline
; hydrography
; numerical method
; nutrient budget
; oxygen isotope
; polynya
; principal component analysis
; river discharge
; stable isotope
; water mass
; Arctic Ocean
; Arctic Ocean
; Laptev Sea
英文摘要: Large gradients and inter annual variations on the Laptev Sea shelf prevent the use of uniform property ranges for a classification of major water masses. The central Laptev Sea is dominated by predominantly marine waters, locally formed polynya waters and riverine summer surface waters. Marine waters enter the central Laptev Sea from the northwestern Laptev Sea shelf and originate from the Kara Sea or the Arctic Ocean halocline. Local polynya waters are formed in the Laptev Sea coastal polynyas. Riverine summer surface waters are formed from Lena river discharge and local melt. We use a principal component analysis (PCA) in order to assess the distribution and importance of water masses within the Laptev Sea. This mathematical method is applied to hydro-chemical summer data sets from the Laptev Sea from five years and allows to define water types based on objective and statistically significant criteria. We argue that the PCA-derived water types are consistent with the Laptev Sea hydrography and indeed represent the major water masses on the central Laptev Sea shelf. Budgets estimated for the thus defined major Laptev Sea water masses indicate that freshwater inflow from the western Laptev Sea is about half or in the same order of magnitude as freshwater stored in locally formed polynya waters. Imported water dominates the nutrient budget in the central Laptev Sea; and only in years with enhanced local polynya activity is the nutrient budget of the locally formed water in the same order as imported nutrients. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114427
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Arctic and Antarctic Research Institute, St. Petersburg, Russian Federation
Recommended Citation:
Bauch D.,Cherniavskaia E.. Water Mass Classification on a Highly Variable Arctic Shelf Region: Origin of Laptev Sea Water Masses and Implications for the Nutrient Budget[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)