DOI: 10.5194/tc-8-1161-2014
Scopus记录号: 2-s2.0-84904303780
论文题名: MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords
作者: Hudson B ; , Overeem I ; , McGrath D ; , Syvitski J ; P ; M ; , Mikkelsen A ; , Hasholt B
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 4 起始页码: 1161
结束页码: 1176
语种: 英语
英文关键词: algorithm
; data set
; fjord
; freshwater input
; glaciofluvial deposit
; ice sheet
; image analysis
; MODIS
; river plume
; runoff
; spatial variation
; suspended sediment
; Terra (satellite)
; Arctic
; Atlantic Ocean
; Atlantic Ocean (North)
; Greenland
; Greenland Ice Sheet
英文摘要: The freshwater flux from the Greenland Ice Sheet (GrIS) to the North Atlantic Ocean carries extensive but poorly documented volumes of sediment. We develop a suspended sediment concentration (SSC) retrieval algorithm using a large Greenland specific in situ data set. This algorithm is applied to all cloud-free NASA Moderate Resolution Imaging Spectrometer (MODIS) Terra images from 2000 to 2012 to monitor SSC dynamics at six river plumes in three fjords in southwest Greenland. Melt-season mean plume SSC increased at all but one site, although these trends were primarily not statistically significant. Zones of sediment concentration > 50 mg L-1 expanded in three river plumes, with potential consequences for biological productivity. The high SSC cores of sediment plumes (> 250 mg L-1 expanded in one-third of study locations. At a regional scale, higher volumes of runoff were associated with higher melt-season mean plume SSC values, but this relationship did not hold for individual rivers. High spatial variability between proximal plumes highlights the complex processes operating in Greenland's glacio-fluvial-fjord systems. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74827
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: University of Colorado, Department of Geological Sciences, Boulder, CO, United States; University of Colorado, Community Surface Dynamics Modeling System, INSTAAR, Boulder, CO, United States; University of Colorado, CIRES, Boulder, CO, United States; University of Copenhagen, Copenhagen, Denmark
Recommended Citation:
Hudson B,, Overeem I,, McGrath D,et al. MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords[J]. Cryosphere,2014-01-01,8(4)