Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.7498/aps.62.099203 |
Energy balance analysis over Loess Plateau and the consequences for carbon dioxide flux | |
Liang Jie-Ning; Zhang Lei; Zhang Wu; Shi Jin-Sen | |
通讯作者 | Zhang Lei |
来源期刊 | ACTA PHYSICA SINICA |
ISSN | 1000-3290 |
出版年 | 2013 |
卷号 | 62期号:9 |
英文摘要 | This paper examines the surface energy imbalance status over the semi-arid areas of the Loess Plateau, using the data collected by eddy covariance (EC) and boundary layer meteorological measurement systems at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL). The energy balance ratio is about 0.80 during the daytime in all seasons, while that is only about 0.20 in the night. For the observation time with no local circulation, the energy balance ratio is improved to more than 85% in the daytime. Even in the night of spring, summer or autumn, the energy balance ratio is also improved to 70%. However, the ratio in nighttime of winter is only 29.4%. After taking into consideration all the energy budget items, the surface energy is still not closed, which means that the eddy covariance system underestimated the turbulent heat flux. And the observation error changes with seasons, with maximum in winter and minimum in spring. The errors of sensible heat flux and latent heat flux may impact CO2 flux through the WPL correction, and cause the uncertainty of long term net ecosystem exchange (NEE), and the NEE throughout the year can be overestimated by 41.2%. |
英文关键词 | Loess Plateau eddy covariance energy balance correction for density effects |
类型 | Article |
语种 | 中文 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000319866900075 |
WOS关键词 | EDDY FLUXES ; FOREST ; CO2 ; IMBALANCE ; CLOSURE ; HEAT |
WOS类目 | Physics, Multidisciplinary |
WOS研究方向 | Physics |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/175454 |
作者单位 | Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China |
推荐引用方式 GB/T 7714 | Liang Jie-Ning,Zhang Lei,Zhang Wu,et al. Energy balance analysis over Loess Plateau and the consequences for carbon dioxide flux[J]. 兰州大学,2013,62(9). |
APA | Liang Jie-Ning,Zhang Lei,Zhang Wu,&Shi Jin-Sen.(2013).Energy balance analysis over Loess Plateau and the consequences for carbon dioxide flux.ACTA PHYSICA SINICA,62(9). |
MLA | Liang Jie-Ning,et al."Energy balance analysis over Loess Plateau and the consequences for carbon dioxide flux".ACTA PHYSICA SINICA 62.9(2013). |
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