| 周守东,李红梅,杨 鹏.陆地晴空水汽柱含量的 MODIS 反演方法研究[J].海南师范大学学报自科版,2017,30(1):47-54 |
| 陆地晴空水汽柱含量的 MODIS 反演方法研究 |
| Retrieval of Atmospheric Total Column Water Vapor AmountOver Land Under Clear Sky Based on MODIS Data |
| 投稿时间：2016-11-18 |
| DOI：10.12051/j.issn.1674-4942.2017.01.009 |
| 中文关键词: 水汽柱总含量 通道比值法 中分辨率成像光谱仪 反演 |
| 英文关键词: total amount water vapor column channel ratio method Moderate Resolution Imaging Spectro-radiometer
(MODIS) retrieval |
| 基金项目: |
|
| 摘要点击次数: 868 |
| 全文下载次数: 614 |
| 中文摘要: |
| 基于红外辐射传输方程,结合反演水汽的差分吸收技术和传统的通道比值法,利用中
心波长均位于 940 nm 附近的 MODIS 水汽吸收通道(17 通道和 18 通道)的比值对垂直大气柱水汽总
含量进行反演. 在地基水汽观测点区域,利用新方法对卫星反演结果与微波辐射计观测数据进行
比较并加以修正,修正后的新方法的反演精度和微波辐射计相当,两者相关系数 R = 88.2%,标准偏
差 SD = 0.29 cm. 同时,选择台湾海峡作为研究区域,通过 2008 年 7 月 24 日的近红外 MODIS 资料,运
用新的通道比值法进行水汽含量的反演加以验证,并和 MOD07 产品进行了比较,两者相关系数
R = 88.1%,标准偏差 SD = 0.36 cm. 结果表明修正后的新通道比值法的结果比传统的通道比值法精
度有一定提高. |
| 英文摘要: |
| Based on radiative transfer equation in infrared bands, a method is described to retrieve total amounts of atmo⁃
spheric water vapor column by considering a combination of differential absorption technique and traditional band ratio
method. The bands used in the method are MODIS 17th and 18th channels centered at around 940 nm respectively. Results
obtained by new method are compared with ground-based microwave radiometer observations. The new method is then
modified according to the difference between these two kinds of data with equivalent precision of microwave radiometer.
Correlation coefficient between these two data is R = 88.2% with standard deviation SD = 1.29cm. Also, retrieval experi⁃
ments of total water vapor abundance with near-infrared MODIS data over Taiwan Strait on July 24th, 2004 was carried out
by using the new channel ratio method. The results are compared with MOD07 product. Correlation coefficient between
them is R = 88.1% with SD = 0.36cm. Conclusions can be reached that results by using the modified new method are to
some extent more accurate than those obtained by using traditional band ratio method. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
