Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020623 |
Fluxes of particulates and nutrients during hydrologically defined seasonal periods in an ice-affected great Arctic river, the Mackenzie | |
Gareis, Jolie A. L.1; Lesack, Lance F. W.1,2 | |
2017-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Large circumpolar rivers influence the biogeochemistry of coastal shelf ecosystems and Arctic Ocean circulation. From 2007 to 2010, Mackenzie River nutrients were measured immediately upstream of the Mackenzie Delta. Total suspended sediment (TSS) and the dissolved and particulate fractions of carbon, nitrogen, and phosphorus were measured throughout the water year, stratified by hydrologically defined seasonal periods. Sampling was most frequent during the ice breakup and freshet periods to capture changes in sediment and nutrient concentrations that occurred with rapidly changing discharge. Our 4 year sampling coverage yielded constituent-specific concentration-discharge relationships that differed among seasonal hydrological periods for 6 of 12 constituents. Results revealed that having data from the rising-water freshet, when ice effects drive much higher water levels for a given discharge than during open water, had a surprisingly modest effect on annual flux calculations for most constituents. The rising freshet, however, was dominated by high relative levels of C-rich dissolved organic matter, P-rich particles, and N-rich inorganic nutrients. Comparisons with fluxes based on volume-weighted means of sample concentrations revealed that most, though not all, river fluxes were strongly driven by short-term concentration-discharge dynamics rather than by total annual discharge. Comparisons with fluxes derived for the Mackenzie discharge record, where results from other years are available, suggest that concentration-discharge relations may not be robust beyond the observation period in this system. Constituent fluxes herein differ from previously published fluxes for the Mackenzie (e.g., lower TSS, higher dissolved organic carbon), likely reflecting more frequent measurements, more representative characterization of differing hydrological periods, and possible changes in concentration-discharge relations during the longer-term Mackenzie record. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407895000051 |
WOS关键词 | DISSOLVED ORGANIC-MATTER ; BEAUFORT SEA ; NORTHWEST-TERRITORIES ; CANADIAN SHELF ; FRESH-WATER ; DELTA ; SEDIMENT ; OCEAN ; DISCHARGE ; BREAKUP |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22079 |
专题 | 资源环境科学 |
作者单位 | 1.Simon Fraser Univ, Dept Geog, Burnaby, BC, Canada; 2.Simon Fraser Univ, Dept Biol Sci, Burnaby, BC, Canada |
推荐引用方式 GB/T 7714 | Gareis, Jolie A. L.,Lesack, Lance F. W.. Fluxes of particulates and nutrients during hydrologically defined seasonal periods in an ice-affected great Arctic river, the Mackenzie[J]. WATER RESOURCES RESEARCH,2017,53(7). |
APA | Gareis, Jolie A. L.,&Lesack, Lance F. W..(2017).Fluxes of particulates and nutrients during hydrologically defined seasonal periods in an ice-affected great Arctic river, the Mackenzie.WATER RESOURCES RESEARCH,53(7). |
MLA | Gareis, Jolie A. L.,et al."Fluxes of particulates and nutrients during hydrologically defined seasonal periods in an ice-affected great Arctic river, the Mackenzie".WATER RESOURCES RESEARCH 53.7(2017). |
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