DOI: 10.5194/hess-19-1169-2015
Scopus记录号: 2-s2.0-84923876630
论文题名: Technical note: Higher-order statistical moments and a procedure that detects potentially anomalous years as two alternative methods describing alterations in continuous environmental data
作者: Arismendi I ; , Johnson S ; L ; , Dunham J ; B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 3 起始页码: 1169
结束页码: 1180
语种: 英语
Scopus关键词: Higher order statistics
; Statistical methods
; Ecological response
; Empirical distributions
; Environmental regimes
; Methodological approach
; Non-metric multidimensional scaling
; Spatial variability
; Statistical moments
; Stream temperatures
; Open hearth furnaces
; anthropogenic effect
; climate change
; dispersion
; streamflow
; temporal analysis
; vulnerability
; water use
英文摘要: Statistics of central tendency and dispersion may not capture relevant or desired characteristics of the distribution of continuous phenomena and, thus, they may not adequately describe temporal patterns of change. Here, we present two methodological approaches that can help to identify temporal changes in environmental regimes. First, we use higher-order statistical moments (skewness and kurtosis) to examine potential changes of empirical distributions at decadal extents. Second, we adapt a statistical procedure combining a non-metric multidimensional scaling technique and higher density region plots to detect potentially anomalous years. We illustrate the use of these approaches by examining long-term stream temperature data from minimally and highly human-influenced streams. In particular, we contrast predictions about thermal regime responses to changing climates and human-related water uses. Using these methods, we effectively diagnose years with unusual thermal variability and patterns in variability through time, as well as spatial variability linked to regional and local factors that influence stream temperature. Our findings highlight the complexity of responses of thermal regimes of streams and reveal their differential vulnerability to climate warming and human-related water uses. The two approaches presented here can be applied with a variety of other continuous phenomena to address historical changes, extreme events, and their associated ecological responses. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78586
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR, United States; US Forest Service, Pacific Northwest Research Station, Corvallis, OR, United States; US Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, United States
Recommended Citation:
Arismendi I,, Johnson S,L,et al. Technical note: Higher-order statistical moments and a procedure that detects potentially anomalous years as two alternative methods describing alterations in continuous environmental data[J]. Hydrology and Earth System Sciences,2015-01-01,19(3)