globalchange  > 气候变化事实与影响
DOI: 10.1175/JHM-D-18-0126.1
WOS记录号: WOS:000462740600002
论文题名:
Bias Correction of Zero-Inflated RCM Precipitation Fields: A Copula-Based Scheme for Both Mean and Extreme Conditions
作者: Maity, Rajib1,2; Suman, Mayank3; Laux, Patrick2,4; Kunstmann, Harald2,4
通讯作者: Maity, Rajib
刊名: JOURNAL OF HYDROMETEOROLOGY
ISSN: 1525-755X
EISSN: 1525-7541
出版年: 2019
卷: 20, 期:4, 页码:595-611
语种: 英语
英文关键词: Extreme events ; Climate change ; Bias
WOS关键词: REGIONAL CLIMATE MODEL ; IMPACT ANALYSIS ; SOIL-MOISTURE ; SIMULATIONS ; GERMANY ; TEMPERATURE ; DEPENDENCE ; ENSEMBLE ; INDEX ; BASIN
WOS学科分类: Meteorology & Atmospheric Sciences
WOS研究方向: Meteorology & Atmospheric Sciences
英文摘要:

Changes in extreme precipitation due to climate change often require the application of methods to bias correct simulated atmospheric fields, including extremes. Most existing bias correction techniques (i) only focus on the bias in the mean value or on the extreme values separately, and (ii) exclude zero values from analysis, even though their presence is significant in daily precipitation. We developed a copula-based bias correction scheme that is suitable for zero-inflated daily precipitation data to correct the bias in mean as well as in extreme precipitation at any specific statistical quantile. In considering the whole of Germany as a test bed, the proposed scheme is found to work well across the entire study area, including the German Alpine regions. The joint distribution between observed and regional climate model (RCM)-derived precipitation is developed through copulas. In particular, the joint distribution is modified to make it discrete at zero in order to account for zero values. The benefit of considering zero precipitation values is revealed through the improved performance of bias correction both in the mean and extreme values. Second, the quantile that best captures the bias (whether in the mean or any extreme value) is determined for a specific location and varies spatially and seasonally. This relaxation in selecting the location-specific optimal quantile renders the proposed methodology spatially transferable. By acknowledging possible changes in extreme precipitation due to climate change, the proposed scheme is expected to be suitable for climate change impact assessments for extreme events worldwide.


Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/133563
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: 1.Indian Inst Technol Kharagpur, Dept Civil Engn, Kharagpur, W Bengal, India
2.Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK IFU, Campus Alpin, Garmisch Partenkirchen, Germany
3.Indian Inst Technol Kharagpur, Sch Water Resources, Kharagpur, W Bengal, India
4.Univ Augsburg, Inst Geog, Augsburg, Germany

Recommended Citation:
Maity, Rajib,Suman, Mayank,Laux, Patrick,et al. Bias Correction of Zero-Inflated RCM Precipitation Fields: A Copula-Based Scheme for Both Mean and Extreme Conditions[J]. JOURNAL OF HYDROMETEOROLOGY,2019-01-01,20(4):595-611
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Maity, Rajib]'s Articles
[Suman, Mayank]'s Articles
[Laux, Patrick]'s Articles
百度学术
Similar articles in Baidu Scholar
[Maity, Rajib]'s Articles
[Suman, Mayank]'s Articles
[Laux, Patrick]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Maity, Rajib]‘s Articles
[Suman, Mayank]‘s Articles
[Laux, Patrick]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.