Effects of polarization calibration on aerosol optical depth retrieval: An ocean case sensitivity analysis
文献类型：期刊论文
| 作者 | Liu TianYue1; Chi TianHe1; Chen Wei1 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2015 |
| 卷号 | 58期号:6页码:6240-6256 |
| 关键词 | aerosol polarization calibration radiative transfer |
| 通讯作者 | Liu, TY (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China. |
| 英文摘要 | Reflectance measurements of both the visible and infrared bands of passive remote sensing sensors are widely used to retrieve aerosol optical depth (AOD) information. This is performed commonly for data obtained over both ocean and land, and these measurements allow for the off line development of a lookup table using radiative transfer models. Owing to molecular and aerosol effects, the reflected light received by the sensor is usually highly polarized. The linear polarization effect may be up to 100%, and the polarization factor of a sensor optical system will change the total intensity as well as the polarization status of the signal reaching the detector. The detector response will be different when the incident light polarization status changes, even if the total intensity remains constant. However, if the polarization calibration is neglected, it will cause obvious errors in the aerosol data retrieval. This is especially true for aerosol optical depth retrieval over an ocean. This measurement relies directly on the reflectance output of the sensor. Cases involving land surfaces are not discussed herein because the inhomogeneous properties conceal the error due to polarization. Taking the 550 and 860 nm bands as examples, the difference between the real top-of-atmosphere (TOA) reflectance and the reflectance reaching the detector is calculated using three different sensor polarization standards according to the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer (MODIS) standards. The differences in AOD retrieval are also demonstrated using the lookup table developed previously from a vector radiative transfer code. The results reveal that under a normal situation in which the AOD is 0.15, the maximum AOD retrieval error could reach 0.04 in 550 nm but only 0.02 in 860 nm for the dust aerosol model. For the soot aerosol model, the maximum AOD retrieval error is 0.1 in 550 nm and 0.12 in 860 nm, indicating that the lack of polarization calibration will lead to large errors in aerosol retrieval over an ocean. |
| 研究领域[WOS] | Geosciences, Multidisciplinary |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000354901900009 |
| 源URL | [http://ir.ceode.ac.cn/handle/183411/38195]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.[Liu TianYue 2.Chi TianHe] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 3.[Liu TianYue] Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.[Chen Wei] China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu TianYue,Chi TianHe,Chen Wei. Effects of polarization calibration on aerosol optical depth retrieval: An ocean case sensitivity analysis[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(6):6240-6256. |
| APA | Liu TianYue,Chi TianHe,&Chen Wei.(2015).Effects of polarization calibration on aerosol optical depth retrieval: An ocean case sensitivity analysis.SCIENCE CHINA-EARTH SCIENCES,58(6),6240-6256. |
| MLA | Liu TianYue,et al."Effects of polarization calibration on aerosol optical depth retrieval: An ocean case sensitivity analysis".SCIENCE CHINA-EARTH SCIENCES 58.6(2015):6240-6256. |
入库方式： OAI收割
来源：遥感与数字地球研究所
浏览0
下载0
收藏0
其他版本
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。