Arid
DOI10.5194/amt-7-4353-2014
Scientific impact of MODIS C5 calibration degradation and C6+improvements
Lyapustin, A.1; Wang, Y.2; Xiong, X.1; Meister, G.1; Platnick, S.1; Levy, R.1; Franz, B.1; Korkin, S.3; Hilker, T.4; Tucker, J.1; Hall, F.2; Sellers, P.1; Wu, A.5; Angal, A.6
通讯作者Lyapustin, A.
来源期刊ATMOSPHERIC MEASUREMENT TECHNIQUES
ISSN1867-1381
EISSN1867-8548
出版年2014
卷号7期号:12页码:4353-4365
英文摘要

The Collection 6 (C6) MODIS (Moderate Resolution Imaging Spectroradiometer) land and atmosphere data sets are scheduled for release in 2014. C6 contains significant revisions of the calibration approach to account for sensor aging. This analysis documents the presence of systematic temporal trends in the visible and near-infrared (500 m) bands of the Collection 5 (C5) MODIS Terra and, to lesser extent, in MODIS Aqua geophysical data sets. Sensor degradation is largest in the blue band (B3) of the MODIS sensor on Terra and decreases with wavelength. Calibration degradation causes negative global trends in multiple MODIS C5 products including the dark target algorithm’s aerosol optical depth over land and Angstrom exponent over the ocean, global liquid water and ice cloud optical thickness, as well as surface reflectance and vegetation indices, including the normalized difference vegetation index (NDVI) and enhanced vegetation index (EVI). As the C5 production will be maintained for another year in parallel with C6, one objective of this paper is to raise awareness of the calibration-related trends for the broad MODIS user community. The new C6 calibration approach removes major calibrations trends in the Level 1B (L1B) data. This paper also introduces an enhanced C6+ calibration of the MODIS data set which includes an additional polarization correction (PC) to compensate for the increased polarization sensitivity of MODIS Terra since about 2007, as well as detrending and Terra-Aqua cross-calibration over quasi-stable desert calibration sites. The PC algorithm, developed by the MODIS ocean biology processing group (OBPG), removes residual scan angle, mirror side and seasonal biases from aerosol and surface reflectance (SR) records along with spectral distortions of SR. Using the multiangle implementation of atmospheric correction (MAIAC) algorithm over deserts, we have also developed a detrending and cross-calibration method which removes residual decadal trends on the order of several tenths of 1% of the top-of-atmosphere (TOA) reflectance in the visible and near-infrared MODIS bands B1-B4, and provides a good consistency between the two MODIS sensors. MAIAC analysis over the southern USA shows that the C6+ approach removed an additional negative decadal trend of Terra Delta NDVI similar to 0.01 as compared to Aqua data. This change is particularly important for analysis of vegetation dynamics and trends in the tropics, e.g., Amazon rainforest, where the morning orbit of Terra provides considerably more cloud-free observations compared to the afternoon Aqua measurements.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000352290900008
WOS关键词RESOLUTION IMAGING SPECTRORADIOMETER ; ATMOSPHERIC CORRECTION ; AEROSOL PRODUCTS ; CARBON SINK ; SENSITIVITY ; BANDS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180953
作者单位1.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA;
2.Univ Maryland Baltimore Cty, Baltimore, MD 21228 USA;
3.Univ Space Res Assoc GESTAR, Columbia, MD USA;
4.Oregon State Univ, Corvallis, OR 97331 USA;
5.Sigma Space Corp, Lanham, MD USA;
6.Sci Syst & Applicat Inc, Lanham, MD USA
推荐引用方式
GB/T 7714
Lyapustin, A.,Wang, Y.,Xiong, X.,et al. Scientific impact of MODIS C5 calibration degradation and C6+improvements[J],2014,7(12):4353-4365.
APA Lyapustin, A..,Wang, Y..,Xiong, X..,Meister, G..,Platnick, S..,...&Angal, A..(2014).Scientific impact of MODIS C5 calibration degradation and C6+improvements.ATMOSPHERIC MEASUREMENT TECHNIQUES,7(12),4353-4365.
MLA Lyapustin, A.,et al."Scientific impact of MODIS C5 calibration degradation and C6+improvements".ATMOSPHERIC MEASUREMENT TECHNIQUES 7.12(2014):4353-4365.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Lyapustin, A.]的文章
[Wang, Y.]的文章
[Xiong, X.]的文章
百度学术
百度学术中相似的文章
[Lyapustin, A.]的文章
[Wang, Y.]的文章
[Xiong, X.]的文章
必应学术
必应学术中相似的文章
[Lyapustin, A.]的文章
[Wang, Y.]的文章
[Xiong, X.]的文章
相关权益政策
暂无数据
收藏/分享

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。