Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5990 |
A hierarchical analysis of the impact of methodological decisions on statistical downscaling of daily precipitation and air temperatures | |
Pryor, Sara C.1; Schoof, Justin T.2 | |
2019-05-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:6页码:2880-2900 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Despite the widespread application of statistical downscaling tools, uncertainty remains regarding the role of model formulation in determining model skill for daily maximum and minimum temperature (T-max and T-min), and precipitation occurrence and intensity. Impacts of several key aspects of statistical transfer function form on model skill are evaluated using a framework resistant to model overspecification. We focus on: (a) model structure: simple (generalized linear models, GLMs) versus complex (artificial neural networks, ANNs) models. (b) Predictor selection: Fixed number of predictors chosen a priori versus stepwise selection of predictors and inclusion of grid point values versus predictors derived from application of principal components analysis (PCA) to spatial fields. We also examine the influence of domain size on model performance. For precipitation downscaling, we consider the role of the threshold used to characterize a wet day and apply three approaches (Poisson and Gamma distributions in GLM and ANN) to downscale wet-day precipitation amounts. While no downscaling formulation is optimal for all predictands and at 10 locations representing diverse U.S. climates, and due to the exclusion of variance inflation all of the downscaling formulations fail to reproduce the range of observed variability, models with larger suites of prospective predictors generally have higher skill. For temperature downscaling, ANNs generally outperform GLM, with greater improvements for T-min than T-max. Use of PCA-derived predictors does not systematically improve model skill, but does improve skill for temperature extremes. Model skill for precipitation occurrence generally increases as the wet-day threshold increases and models using PCA-derived predictors tend to outperform those based on grid cell predictors. Each model for wet-day precipitation intensity overestimates annual total precipitation and underestimates the proportion derived from extreme precipitation events, but ANN-based models and those with larger predictor suites tend to have the smallest bias. |
英文关键词 | air temperature CLIMDEX daily ERA-interim Livneh model precipitation predictors skill statistical downscaling United States of America |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465863900003 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; REGIONAL CLIMATE MODEL ; HIDDEN MARKOV MODEL ; UNITED-STATES ; VARIABILITY ; REGRESSION ; TRANSFERABILITY ; REANALYSIS ; INFLATION ; PATTERNS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/182948 |
专题 | 气候变化 |
作者单位 | 1.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA; 2.Southern Illinois Univ, Dept Geog & Environm Resource, Carbondale, IL USA |
推荐引用方式 GB/T 7714 | Pryor, Sara C.,Schoof, Justin T.. A hierarchical analysis of the impact of methodological decisions on statistical downscaling of daily precipitation and air temperatures[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(6):2880-2900. |
APA | Pryor, Sara C.,&Schoof, Justin T..(2019).A hierarchical analysis of the impact of methodological decisions on statistical downscaling of daily precipitation and air temperatures.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(6),2880-2900. |
MLA | Pryor, Sara C.,et al."A hierarchical analysis of the impact of methodological decisions on statistical downscaling of daily precipitation and air temperatures".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.6(2019):2880-2900. |
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