文件名称:
An improved algorithm for retrieving chlorophyll-a from MODIS imagery
开发工具:
文件大小: 831kb
下载次数: 0
上传时间: 2013-08-22
详细说明： In this study, an improved MODIS ocean chlorophyll-a (chla) 3 model (IOC3M) algorithm was developed as a substitute for the MODIS global chla concentration estimation algorithm, OC3M, to estimate chla concentrations in waters with high suspended sediment concentrations (SSC), such as the Yellow River Estuary, China. The IOC3M algorithm uses [Rrs-1(λ1)-k1Rrs-1(λ2)]/[Rrs-1(λ3)-k2Rrs-1(λ4)] to substitute for switching the two band ratio of max[Rrs(443nm), Rrs(488nm)]/Rrs(551nm) of the OC3M algorithm. In the IOC3M algorithm, the abs orption coefficient of chla can be isolated as long as reasonable bands are selected. The performance of IOC3M and OC3M was calibrated and validated using a bio-optical data set composed of spectral upwelling radiance measurements and chla concentrations collected during three independent cruises in the Yellow River Estuary in September of 2009. It was found that the optimal bands of the IOC3M algorithm were λ1=443nmnm, λ2=748nm, λ3=551nm, and λ4=870nm. By comparison, the IOC3M algorithm produces superior performance to the OC3M algorithm. Using the IOC3M algorithm in estimating chla concentrations from the Yellow River Estuary decreases 1.03 mg/m3 uncertainty from the OC3M algorithm. Additionally, the chla concentration estimated from MODIS data reveals that more than 90% of the water in the Yellow River Estuary has a chla concentration lower than 5.0 mg/m3. The averaged chla concentration is closed to the in situ measurements. Although the case study presented herein is unique, the modeling procedures employed by the IOC3M algorithm can be useful in remote sensing to estimate the chla concentrations of similar aquatic environments. ...展开收缩
(系统自动生成,下载前可以参看下载内容)
下载文件列表
相关说明
- 本站资源为会员上传分享交流与学习,如有侵犯您的权益,请联系我们删除.
- 本站是交换下载平台，提供交流渠道，下载内容来自于网络，除下载问题外，其它问题请自行百度。
- 本站已设置防盗链，请勿用迅雷、QQ旋风等多线程下载软件下载资源，下载后用WinRAR最新版进行解压.
- 如果您发现内容无法下载，请稍后再次尝试；或者到消费记录里找到下载记录反馈给我们.
- 下载后发现下载的内容跟说明不相乎，请到消费记录里找到下载记录反馈给我们，经确认后退回积分.
- 如下载前有疑问，可以通过点击"提供者"的名字，查看对方的联系方式，联系对方咨询.
