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DOI | 10.1029/2005GB002484 |
Holocene climate and carbon cycle dynamics: Experiments with the ’’green’’ McGill Paleoclimate Model | |
Wang, Y; Mysak, LA; Roulet, NT | |
通讯作者 | Wang, Y |
来源期刊 | GLOBAL BIOGEOCHEMICAL CYCLES
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ISSN | 0886-6236 |
EISSN | 1944-9224 |
出版年 | 2005 |
卷号 | 19期号:3 |
英文摘要 | [1] An inverse method is used to investigate the global carbon cycle from the early Holocene ( 8 kyr BP) to the end of the pre-industrial period ( 0 kyr BP) in an improved version of the "green’’ McGill Paleoclimate Model (MPM). In this paper, we now take into account the vegetation-precipitation feedback and evaluate the terrestrial carbon cycle for the pre-industrial equilibrium. From our coupled transient simulation under orbital forcing, reconstructed ( Taylor Dome) atmospheric CO2 forcing and a prescribed retreating Laurentide Ice Sheet ( LIS), we find a decrease of 70 PgC in total carbon storage in the Sahara region ( 15 degrees N to 30 degrees N and 15 degrees W to 50 degrees E), which is caused by the desertification simulated in the green MPM. The above decrease is partially compensated by an increase of 40 PgC in total carbon storage in the Southern Hemisphere from 8 to 2 kyr BP. From an analysis of the total carbon stored under the ice sheet, we can infer that this carbon has negligible impact on atmospheric CO2 after 8 kyr BP. From our model results, we further conclude that the retreating LIS, together with the vegetation-albedo feedback, cause the global terrestrial carbon to increase from 8 to 6 kyr BP. The application of the inverse method suggests that the first 10 ppmv increase in atmospheric CO2 from 8 to 6 kyr BP comes from the ocean. Finally, in the model simulations, the total terrestrial carbon release from 6 to 0 kyr BP is about 68 to 95 PgC, which would produce about a 5 to 7 ppmv atmospheric CO2 increase, based on the calculation of Joos et al. ( 2004). Owing to our model limitation ( there is no ocean carbon cycle), we cannot conclude whether the overall oceanic CO2 release from 8 to 0 kyr BP is due to outgassing related to SST changes or to calcite compensation as proposed by Broecker et al. ( 2001). |
类型 | Article |
语种 | 英语 |
国家 | Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000232110700001 |
WOS关键词 | LAST GLACIAL MAXIMUM ; PAST 21,000 YEARS ; TERRESTRIAL BIOSPHERE ; ATMOSPHERIC CO2 ; GCM SIMULATION ; VEGETATION ; SURFACE ; SENSITIVITY ; SEA ; STORAGE |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/149156 |
作者单位 | (1)McGill Univ, Dept Atmospher & Ocean Sci, Earth Syst Modeling Grp, Montreal, PQ H3A 2K6, Canada;(2)McGill Univ, Dept Geog, Montreal, PQ H3A 2A7, Canada;(3)McGill Univ, McGill Sch Environm, Montreal, PQ H3A 2A7, Canada |
推荐引用方式 GB/T 7714 | Wang, Y,Mysak, LA,Roulet, NT. Holocene climate and carbon cycle dynamics: Experiments with the ’’green’’ McGill Paleoclimate Model[J],2005,19(3). |
APA | Wang, Y,Mysak, LA,&Roulet, NT.(2005).Holocene climate and carbon cycle dynamics: Experiments with the ’’green’’ McGill Paleoclimate Model.GLOBAL BIOGEOCHEMICAL CYCLES,19(3). |
MLA | Wang, Y,et al."Holocene climate and carbon cycle dynamics: Experiments with the ’’green’’ McGill Paleoclimate Model".GLOBAL BIOGEOCHEMICAL CYCLES 19.3(2005). |
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