%0 Journal Article
%T Remote sensing of algal blooms using a turbidity-free function for near-infrared andred signals<br>Remote sensing of algal blooms using a turbidity-free function for near-infrared and red signals
%A LI Yan
%A SHANG Shaoling
%A ZHANG Caiyun
%A MA Xiaoxin
%A HUANG Liwei
%A WU Jingyu
%A ZENG Yindong
%A <br>LI
%A Yan
%A SHANG
%A Shaoling
%A ZHANG
%A Caiyun
%A MA
%A Xiaoxin
%A HUANG
%A Liwei
%A WU
%A Jingyu
%A ZENG
%A Yindong
%J 科学通报(英文版)
%D 2006
%I 
%X This article presents a method for real-time mapping of algal blooms in turbid coastal waters using the remote sensing reflectance of red band (Channel 1, 580–680 nm) and near-infrared band (Channel 2, 720–1100 nm) of the AVHRR sensor on the NOAA series satellites. A turbidity-free function for near-infrared and red signals, α 0 = (b b (1)/b b (2))(a (2)/a (1)) based on the first order b b/(a+b b) model deducing equation R rs (2)-1 = α 0 R rs (1)-1+g  1 (1-α 0), were selected as a chlorophyll-a related index for detecting algal blooms, and the algal blooms with chlorophyll-a concentration of 64–256 mg/L could be defined by window of 1.6 < α 0 < 5.2 and 0.01< R rs (2)/g < 0.2. Such turbidity-free two-band method is supported by both sea-truth data and remote sensing experiment for an algal blooms event on the near-shore water off the Minjiang estuary of southeastern China during early June of 2003. Comparisons of this algorithm with other published algorithms, one-band method (i.e. method of bright water) or two-band methods (i.e. method of ratio, method of NDVI, and method of subtracting) have suggested that the turbidity-free function method could be regarded as a standard algorithm in capabilities of AVHRR imagery or other high resolution but wide near-infrared and red band imagery for detecting algal blooms events in coastal waters.
%K remote sensing
%K marine optics
%K algal bloom
%K algorithm
%K estuary<br>藻花
%K 遥感
%K 混浊函数
%K 红波段
%K 近红外波段
%K 航海光学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=FCA73AD194B5108594774AF7DEE5E10D&yid=37904DC365DD7266&vid=987EDA49D8A7A635&iid=E158A972A605785F&sid=1A033C02510EFBE6&eid=DCE57F652E4ADAFC&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=24