气候变化领域集成服务门户(CCPortal): MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords

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DOI	10.5194/tc-8-1161-2014
	MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords
	Hudson B.; Overeem I.; McGrath D.; Syvitski J.P.M.; Mikkelsen A.; Hasholt B.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
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.
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120092
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
推荐引用方式 GB/T 7714	Hudson B.,Overeem I.,McGrath D.,et al. MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords[J],2014,8(4).
APA	Hudson B.,Overeem I.,McGrath D.,Syvitski J.P.M.,Mikkelsen A.,&Hasholt B..(2014).MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords.Cryosphere,8(4).
MLA	Hudson B.,et al."MODIS observed increase in duration and spatial extent of sediment plumes in Greenland fjords".Cryosphere 8.4(2014).