Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR023270 |
A Resampling Approach for Correcting Systematic Spatiotemporal Biases for Multiple Variables in a Changing Climate | |
Mehrotra, R.; Sharma, A. | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:754-770 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Systematic biases in climate model simulations are commonly addressed using univariate bias correction algorithms that involve matching of mean, variance, and quantiles. These approaches work well for a single variable and location and effectively mimic the observed temporal structure in the corrected series. The intervariable, interspace, and high- or low-frequency temporal dependencies that characterize observed hydrological records are often left untouched and lead to substantial biases in applications such as catchment modeling where their correct representation is critical. In the approach presented here, changes in the dependence attributes are ascertained by resampling of the historical ranks into what these might resemble in the future. The proposed approach is not limited in terms of the number of variables, grid points in space, and the time scale considered. Most importantly, it maintains the shift in dependence and other attributes between the current and the future climate as ascertained by a climate model. The approach is illustrated using daily time series of temperature, precipitation, relative humidity, and wind speed simulated by a regional climate model at 8,910 grid points over Australia. Spatial, temporal, and cross-variable dependence attributes of the corrected simulations at daily and aggregated time scales are compared against quantile mapping and substantial improvements in performance identified. Resampling of corrected ranks offers a very simple, flexible, and effective general purpose multivariate, multitime, and multilocation bias correction alternative for current and future climate. As the approach works in three dimensions, space, time, and variables, it is denoted as 3DBC, or three-dimensional bias correction. Plain Language Summary This article follows on from the considerable work our group and others have done to define approaches for correcting systematic biases in climate model simulations of the future. In the course of our investigation we realized that part of the problem in existing bias correction alternatives was the overreliance on the model simulations, specifically challenging when the models were unstable and simulated unrealistic values for extreme hydrological states of interest. As an alternative, we propose here an approach that relies on relevant statistical attributes of such simulations instead of the full simulations themselves. The proposed resampling strategy simulates future sequences with such attributes, thereby maintaining the hydrological nature of the sequences that are derived. The approach used is a modification of the popular Schaake Shuffle but tailored to work in the context of bias correction here. We demonstrate that the proposed approach is not limited in terms of the number of variables, grid points in space, and the time scale considered. Most importantly, it maintains the shift in dependence and other attributes between the current and the future climate as ascertained using a climate model. |
英文关键词 | three-dimensional bias correction spatiotemporal biases resampling aggregated time scales quantile mapping climate model |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500040 |
WOS关键词 | MODEL OUTPUT STATISTICS ; SCHAAKE SHUFFLE ; PRECIPITATION ; SIMULATIONS ; TEMPERATURE ; DISTRIBUTIONS ; DEPENDENCE ; ENSEMBLES ; FORECASTS ; IMPACT |
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/20109 |
专题 | 资源环境科学 |
作者单位 | Univ New South Wales, Sch Civil & Environm Engn, Water Res Ctr, Sydney, NSW, Australia |
推荐引用方式 GB/T 7714 | Mehrotra, R.,Sharma, A.. A Resampling Approach for Correcting Systematic Spatiotemporal Biases for Multiple Variables in a Changing Climate[J]. WATER RESOURCES RESEARCH,2019,55(1):754-770. |
APA | Mehrotra, R.,&Sharma, A..(2019).A Resampling Approach for Correcting Systematic Spatiotemporal Biases for Multiple Variables in a Changing Climate.WATER RESOURCES RESEARCH,55(1),754-770. |
MLA | Mehrotra, R.,et al."A Resampling Approach for Correcting Systematic Spatiotemporal Biases for Multiple Variables in a Changing Climate".WATER RESOURCES RESEARCH 55.1(2019):754-770. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Mehrotra, R.]的文章 |
[Sharma, A.]的文章 |
百度学术 |
百度学术中相似的文章 |
[Mehrotra, R.]的文章 |
[Sharma, A.]的文章 |
必应学术 |
必应学术中相似的文章 |
[Mehrotra, R.]的文章 |
[Sharma, A.]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
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