DOI: 10.5194/esd-11-77-2020
论文题名: Synthesis and evaluation of historical meridional heat transport from midlatitudes towards the Arctic
作者: Liu Y. ; Attema J. ; Moat B. ; Hazeleger W.
刊名: Earth System Dynamics
ISSN: 21904979
出版年: 2020
卷: 11, 期: 1 语种: 英语
Scopus关键词: Climatology
; Heat transfer
; Oceanography
; Sea ice
; Coupled climate model
; High-resolution ocean model
; Low-frequency signals
; Meridional heat transports
; Research and application
; Retrospective analysis
; Sea ice concentration
; Simple ocean data assimilations
; Climate models
; climate effect
; climate modeling
; climate variation
; data set
; heat transfer
; meridional circulation
; spatial distribution
; Arctic
英文摘要: Meridional energy transport (MET), both in the atmosphere (AMET) and ocean (OMET), has significant impact on the climate in the Arctic. In this study, we quantify AMET and OMET at subpolar latitudes from six reanalysis data sets. We investigate the differences between the data sets and we check the coherence between MET and the Arctic climate variability at interannual timescales. The results indicate that, although the mean transport in all data sets agrees well, the spatial distributions and temporal variations of AMET and OMET differ substantially among the reanalysis data sets. For the ocean, only after 2007, the low-frequency signals in all reanalysis products agree well. A further comparison with observed heat transport at 26.5° N and the subpolar Atlantic, and a high-resolution ocean model hindcast confirms that the OMET estimated from the reanalysis data sets are consistent with the observations. For the atmosphere, the differences between ERA-Interim and the Japanese 55-year Reanalysis (JRA-55) are small, while the Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) differs from them. An extended analysis of linkages between Arctic climate variability and AMET shows that atmospheric reanalyses differ substantially from each other. Among the chosen atmospheric products, ERA-Interim and JRA-55 results are most consistent with those from coupled climate models. For the ocean, the Ocean Reanalysis System 4 (ORAS4) and Simple Ocean Data Assimilation version 3 (SODA3) agree well on the relation between OMET and sea ice concentration (SIC), while the GLobal Ocean reanalyses and Simulations version 3 (GLORYS2V3) deviates from those data sets. The regressions of multiple fields in the Arctic on both AMET and OMET suggest that the Arctic climate is sensitive to changes of meridional energy transport at subpolar latitudes in winter. Given the good agreement on the diagnostics among assessed reanalysis products, our study suggests that the reanalysis products are useful for the evaluation of energy transport. However, assessments of products with the AMET and OMET estimated from reanalysis data sets beyond interannual timescales should be conducted with great care and the robustness of results should be evaluated through intercomparison, especially when studying variability and interactions between the Arctic and midlatitudes. © Author(s) 2020. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159333
Appears in Collections: 气候变化与战略
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作者单位: Netherlands EScience Center, Amsterdam, 1098 XG, Netherlands; Wageningen University, Wageningen, 6708 PB, Netherlands; National Oceanography Center, Southampton, SO14 3ZH, United Kingdom; Faculty of Geoscience, Utrecht University, Utrecht, 3512 JE, Netherlands
Recommended Citation:
Liu Y.,Attema J.,Moat B.,et al. Synthesis and evaluation of historical meridional heat transport from midlatitudes towards the Arctic[J]. Earth System Dynamics,2020-01-01,11(1)