Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jqsrt.2016.05.004 |
Quantification of the errors associated with the representation of surface emissivity in the RRTMG_LW | |
Cheng, Hongze; Chen, Xiuhong; Huang, Xianglei | |
通讯作者 | Huang, Xianglei |
来源期刊 | JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
![]() |
ISSN | 0022-4073 |
EISSN | 1879-1352 |
出版年 | 2016 |
卷号 | 180页码:167-176 |
英文摘要 | Recent studies have shown that representation of surface spectral emissivity has a non negligible impact on the polar radiation budget and on simulated climate. This fact motivates the inclusion of surface spectral emissivity into the radiative transfer scheme employed in the climate models. Using a line-by-line radiative transfer model, LBLRTM, as a benchmark, we quantify the errors due to the approximation of surface spectral emissivity in the RRTMG_LW, a radiation scheme widely used by climate models and numerical forecast models. Error quantifications are done using representative sounding profiles in the tropics, mid-latitude summer, sub-arctic winter and Sahara desert interfaced with either ocean or desert spectral emissivities. Though including surface emissivity causes little difference in broadband outgoing longwave radiation, it can cause noticeable differences in longwave radiative cooling rate from surface to 700 hPa. Compared to the benchmark, the largest deviation in radiative cooling rate usually happens at the lowest atmospheric layers next to the surface, ranging from -0.23 K/day to 0.19 K/day with the largest fractional difference being -16.22%. The discrepancies caused solely by the representation of surface emissivity are confined at the lowest atmospheric layer. Using the emissivity at the diffusive angle or the hemispherically averaged emissivity can affect the calculation accuracy, especially for strongly anisotropic surface emission. The band-by-band contribution to the discrepancies between the RRTMG_LW and benchmark reveals compensating errors among the bands used in the RRTMG_LW. (C) 2016 Elsevier Ltd. All rights reserved. |
英文关键词 | Surface spectral emissivity Longwave radiative cooling rate Radiation budget LBLRTM RRTMG_LW Climate models |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000378461100018 |
WOS关键词 | TRANSFER MODEL LBLRTM ; RADIATIVE-TRANSFER ; PERFORMANCE ; TEMPERATURE ; LONGWAVE ; WATER |
WOS类目 | Optics ; Spectroscopy |
WOS研究方向 | Optics ; Spectroscopy |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/194713 |
作者单位 | Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Cheng, Hongze,Chen, Xiuhong,Huang, Xianglei. Quantification of the errors associated with the representation of surface emissivity in the RRTMG_LW[J],2016,180:167-176. |
APA | Cheng, Hongze,Chen, Xiuhong,&Huang, Xianglei.(2016).Quantification of the errors associated with the representation of surface emissivity in the RRTMG_LW.JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER,180,167-176. |
MLA | Cheng, Hongze,et al."Quantification of the errors associated with the representation of surface emissivity in the RRTMG_LW".JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER 180(2016):167-176. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。