Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017WR022163 |
Effects of Climate Variability on Snowmelt and Implications for Organic Matter in a High-Elevation Lake | |
Sadro, Steven1; Sickman, James O.2; Melack, John M.3; Skeen, Kevin2 | |
2018-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:7页码:4563-4578 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Few coupled lake-watershed studies examine long-term effects of climate on the ecosystem function of lakes in a hydrological context. We use 32 years of hydrological and biogeochemical data from a high-elevation site in the Sierra Nevada of California to characterize variation in snowmelt in relation to climate variability and explore the impact on factors affecting phytoplankton biomass. The magnitude of accumulated winter snow, quantified through basinwide estimates of snow water equivalent (SWE), was the most important climate factor controlling variation in the timing and rate of spring snowmelt. Variations in SWE and snowmelt led to significant differences in lake flushing rate, water temperature, and nitrate concentrations across years. On average in dry years, snowmelt started 25 days earlier and proceeded 7mm/day slower, and the lake began the ice-free season with nitrate concentrations similar to 2 mu M higher and water temperatures 9 degrees C warmer than in wet years. Flushing rates in wet years were 2.5 times larger than those in dry years. Consequently, particulate organic matter concentrations, a proxy for phytoplankton biomass, were 5-6 mu M higher in dry years. There was a temporal trend of increase in particulate organic matter across dry years that corresponded to lake warming independent of variation in SWE. These results suggest that phytoplankton biomass is increasing as a result of both interannual variability in precipitation and long-term warming trends. Our study underscores the need to account for local-scale catchment variability that may affect the accumulation of winter snowpack when predicting climate responses in lakes. |
英文关键词 | climate change mountain snowmelt organic matter nutrients lake |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442502100022 |
WOS关键词 | WESTERN UNITED-STATES ; SIERRA-NEVADA ; CALIFORNIA DROUGHT ; ALPINE LAKE ; INTERANNUAL FLUCTUATIONS ; TROPHIC CASCADE ; NORTH-AMERICA ; CASTLE LAKE ; ECOSYSTEMS ; CATCHMENTS |
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/20433 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616 USA; 2.Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA; 3.Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA |
推荐引用方式 GB/T 7714 | Sadro, Steven,Sickman, James O.,Melack, John M.,et al. Effects of Climate Variability on Snowmelt and Implications for Organic Matter in a High-Elevation Lake[J]. WATER RESOURCES RESEARCH,2018,54(7):4563-4578. |
APA | Sadro, Steven,Sickman, James O.,Melack, John M.,&Skeen, Kevin.(2018).Effects of Climate Variability on Snowmelt and Implications for Organic Matter in a High-Elevation Lake.WATER RESOURCES RESEARCH,54(7),4563-4578. |
MLA | Sadro, Steven,et al."Effects of Climate Variability on Snowmelt and Implications for Organic Matter in a High-Elevation Lake".WATER RESOURCES RESEARCH 54.7(2018):4563-4578. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论