Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-5561-2017 |
How can mountaintop CO2 observations be used to constrain regional carbon fluxes? | |
Lin, John C.1; Mallia, Derek V.1; Wu, Dien1; Stephens, Britton B.2 | |
2017-05-03 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Despite the need for researchers to understand terrestrial biospheric carbon fluxes to account for carbon cycle feedbacks and predict future CO2 concentrations, knowledge of these fluxes at the regional scale remains poor. This is particularly true in mountainous areas, where complex meteorology and lack of observations lead to large uncertainties in carbon fluxes. Yet mountainous regions are often where significant forest cover and biomass are found - i.e., areas that have the potential to serve as carbon sinks. As CO2 observations are carried out in mountainous areas, it is imperative that they are properly interpreted to yield information about carbon fluxes. In this paper, we present CO2 observations at three sites in the mountains of the western US, along with atmospheric simulations that attempt to extract information about biospheric carbon fluxes from the CO2 observations, with emphasis on the observed and simulated diurnal cycles of CO2. We show that atmospheric models can systematically simulate the wrong diurnal cycle and significantly misinterpret the CO2 observations, due to erroneous atmospheric flows as a result of terrain that is misrepresented in the model. This problem depends on the selected vertical level in the model and is exacerbated as the spatial resolution is degraded, and our results indicate that a fine grid spacing of similar to 4 km or less may be needed to simulate a realistic diurnal cycle of CO2 for sites on top of the steep mountains examined here in the American Rockies. In the absence of higher resolution models, we recommend coarse-scale models to focus on assimilating afternoon CO2 observations on mountaintop sites over the continent to avoid misrepresentations of nocturnal transport and influence. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400578700002 |
WOS关键词 | SUB-ALPINE FOREST ; ATMOSPHERIC CO2 ; DIOXIDE EXCHANGE ; TRANSPORT MODELS ; WEATHER RESEARCH ; COMPLEX TERRAIN ; HIGH-ELEVATION ; UNITED-STATES ; NORTH-AMERICA ; NIWOT-RIDGE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16170 |
专题 | 地球科学 |
作者单位 | 1.Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA; 2.Natl Ctr Atmospher Res, Earth Observing Lab, Boulder, CO 80301 USA |
推荐引用方式 GB/T 7714 | Lin, John C.,Mallia, Derek V.,Wu, Dien,et al. How can mountaintop CO2 observations be used to constrain regional carbon fluxes?[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(9). |
APA | Lin, John C.,Mallia, Derek V.,Wu, Dien,&Stephens, Britton B..(2017).How can mountaintop CO2 observations be used to constrain regional carbon fluxes?.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(9). |
MLA | Lin, John C.,et al."How can mountaintop CO2 observations be used to constrain regional carbon fluxes?".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.9(2017). |
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