| DOI: | 10.1002/grl.50612
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| 论文题名: | The limitations of bias correcting regional climate model inputs |
| 作者: | White R.H.; Toumi R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8869
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| EISSN: | 1944-8600
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| 出版年: | 2013
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| 卷: | 40, 期:12 | | 起始页码: | 2907
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| 结束页码: | 2912
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| 语种: | 英语
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| 英文关键词: | model inputs correction
; precipitation
; regional climate modeling
; South Africa
; statistical bias correction
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| Scopus关键词: | General circulation model
; Linear corrections
; Model inputs
; Regional climate modeling
; Regional climate models
; Relaxation schemes
; South Africa
; Statistical bias
; Catchments
; Precipitation (chemical)
; Climate models
; annual variation
; catchment
; circulation modeling
; climate modeling
; climatology
; downscaling
; precipitation (climatology)
; regional climate
; spatial analysis
; South Africa
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| 英文摘要: | We investigate the theoretical limitations of applying statistical bias corrections to general circulation model data prior to downscaling with a regional climate model (RCM). Two methods from recent literature are compared: linear (LC) and quantile-quantile (QQ) corrections. An LC method is limited to correcting biases only in the distribution mean but retains all first-order spatial and intervariable dependencies. Conversely, the QQ method corrects any bias in the distribution function but cannot retain intervariable dependencies and adds variability to smooth spatial fields. An RCM's boundary relaxation scheme dampens the effect of imbalanced variables but may not remove the spurious variability from the QQ method. Case study results of precipitation over a South African river catchment show that both correction methods improve RCM-simulated monthly climatology, but the QQ correction creates a 20% bias in interannual monthly variability. We recommend the LC method as an effective bias correction for RCM inputs. Key Points Regional simulations can be improved by statistically bias-correcting the inputs Retaining inter-variable dependencies in the input fields is very important Linear corrections should be preferred to quantile-based for this application ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880544146&doi=10.1002%2fgrl.50612&partnerID=40&md5=64be0a2866cf2630a935f8752d2aa8b7
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6133
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
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| Recommended Citation: | |
White R.H.,Toumi R.. The limitations of bias correcting regional climate model inputs[J]. Geophysical Research Letters,2013-01-01,40(12).
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