| DOI: | 10.5194/tc-10-569-2016
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| Scopus记录号: | 2-s2.0-84960877030
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| 论文题名: | Monitoring ice break-up on the Mackenzie River using MODIS data |
| 作者: | Muhammad P; , Duguay C; , Kang K; -K
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2016
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| 卷: | 10, 期:2 | | 起始页码: | 569
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| 结束页码: | 584
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| 语种: | 英语
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| 英文关键词: | Aqua (satellite)
; channel morphology
; confluence
; ice breakup
; ice mechanics
; MODIS
; monitoring system
; snowmelt
; synthetic aperture radar
; temperature effect
; Terra (satellite)
; tracking
; Canada
; Liard River
; Mackenzie Delta
; Mackenzie River [Northwest Territories]
; Northwest Territories
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| 英文摘要: | The aim of this study was to develop an approach for estimating ice break-up dates on the Mackenzie River (MR) using more than a decade of MODIS Level 3 500 m snow products (MOD/MYD10A1), complemented with 250 m Level 1B radiance products (MOD/MYD02QKM) from the Terra and Aqua satellite platforms. The analysis showed break-up began on average between days of year (DOYs) 115 and 125 and ended between DOYs 145 and 155 over 13 ice seasons (2001-2013), resulting in an average melt duration of ca. 30-40 days. Thermal processes were more important in driving ice break-up south of the MR confluence with the Liard River, while dynamically driven break-up was more important north of the Liard. A comparison of the timing of ice disappearance with snow disappearance from surrounding land areas of the MR with MODIS Level 3 snow products showed varying relationships along the river. Ice-off and snow-off timing were in sync north of the MR-Liard River confluence and over sections of the MR before it enters the Mackenzie Delta, but ice disappeared much later than snow on land in regions where thermal ice break-up processes dominated. MODIS observations revealed that channel morphology is a more important control of ice break-up patterns than previously believed with ice runs on the MR strongly influenced by channel morphology (islands and bars, confluences and channel constriction). Ice velocity estimates from feature tracking were able to be made in 2008 and 2010 and yielded 3-4-day average ice velocities of 1.21 and 1.84 m s-1 respectively, which is in agreement with estimates from previous studies. These preliminary results confirm the utility of daily MODIS data for monitoring ice break-up processes along the Mackenzie River. The addition of optical and synthetic aperture radar data from recent and upcoming satellite missions (e.g. Sentinel-1/2/3 and RADARSAT Constellation) would improve the monitoring of ice break-up in narrower sections of the MR. © 2016 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75173
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| 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 Geography, Interdisciplinary Centre on Climate Change (IC), University of Waterloo, Waterloo, ON, Canada
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| Recommended Citation: | |
Muhammad P,, Duguay C,, Kang K,et al. Monitoring ice break-up on the Mackenzie River using MODIS data[J]. Cryosphere,2016-01-01,10(2)
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