| DOI: | 10.1002/hyp.13616
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| 论文题名: | Inter-annual simulation of global carbon cycle variations in a terrestrial–aquatic continuum |
| 作者: | Nakayama T.
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| 刊名: | Hydrological Processes
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| ISSN: | 8856087
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| 出版年: | 2020
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| 卷: | 34, 期:3 | | 语种: | 英语
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| 英文关键词: | controlling factor
; eco-hydrological and biogeochemical coupling model
; inland water
; long-term carbon budget trend
; net land flux
; riverine carbon fluxes
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| Scopus关键词: | Biogeochemistry
; Budget control
; Catchments
; Earth atmosphere
; Water resources
; Watersheds
; Carbon budgets
; Controlling factors
; Coupling modeling
; Inland waters
; Riverine carbon fluxes
; Organic carbon
; annual variation
; carbon budget
; carbon flux
; hydrological modeling
; river basin
; soil carbon
; spatial distribution
; trend analysis
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| 英文摘要: | The advanced process-based model, National Integrated Catchment-based Eco-hydrology (NICE)-BGC, which incorporates the whole process of carbon cycling in land, was modified to include the feedback between soil organic content and overland carbon fluxes. It is a crucial and difficult task to evaluate the balance of the terrestrial carbon budget including the effect of inland water robustly. To accomplish this purpose, NICE-BGC was applied to quantify the global biogeochemical carbon cycle closely associated with the complex hydrological cycle during the 36 years between 1980 and 2015. The model demonstrated that the inter-annual variations of carbon cycle have been greatly affected by the extreme weather patterns. In particular, spatial distribution of temporal trends in riverine carbon fluxes and their relation to soil organic carbon (SOC) were analysed between different biomes and major river basins. Although there was a positive relationship between SOC and riverine flux of dissolved organic carbon and particulate organic carbon in the northern boreal region, it is difficult to see this relation in other regions. Further, the evaluation of potential controlling factors of temporal trends in SOC and fluvial carbon exports was also helpful to quantify the inter-annual variation or temporal trend caused by the various effects. SOC was more influenced by temperature variations, whereas riverine carbon exports were mainly determined by precipitation variations. Finally, net land flux including inland water (−1.49 ± 0.50 PgC/year) showed a slight decrease in the carbon sink in comparison with previous values (−2.33 ± 0.50 PgC/year). These results help to distinguish the carbon cycle in different river basins and to re-evaluate carbon cycle change explicitly including the effect of inland water because this effect has been so far implicitly included within the range of uncertainty in the Earth's global carbon cycle comprising land, oceans, and atmosphere. © 2019 John Wiley & Sons, Ltd. |
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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/159987
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| Appears in Collections: | 气候变化与战略
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作者单位: | Center for Global Environmental Research, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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| Recommended Citation: | |
Nakayama T.. Inter-annual simulation of global carbon cycle variations in a terrestrial–aquatic continuum[J]. Hydrological Processes,2020-01-01,34(3)
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