Chla retrieval

Posted on In Word count in article: 289 Reading time ≈ 1 mins.

A note for Chla algorithm.

Chla Algorithms Review

Name Formula Reference Water type
OC \(log_{10}(Chl)=a_0+a_1X+a_2X^2+a_3X^3+a_4X^4,X=log_{10}(\frac{Rrs_(\lambda_b)}{Rrs_(\lambda_g)})\)(Example) O'Reilly 2019 Clear
OCI image-00030312152124019 Wang 2016;Hu 2011 Coastal
Band ration \(Rrs(751)/Rrs(672)\) Gurlin 2011 Coastal
Tang/Tassan image-00030312152233703 Tang 2004;Tassan,1994;Sun 2010 Coastal
Gitelson image-00030312152341386 Gitelson 2008 Coastal
RLH Rrs(672)-Rrs(555)-{[Rrs(751)-Rrs(555)] × [(672-555)/(751-555)]} Schalles,1998 Coastal
RDR [Rrs(555)-Rrs(488)]/[Rrs(555) + Rrs(488)] Gitelson,1993 Coastal
NDCI [Rrs(751)-Rrs(672)]/[Rrs(751) + Rrs(672)] Mishra, 2012 Coastal
SCI HChla = {Rrs(751) + (751-672)/(751-555) × [Rrs(555)-Rrs(751)]}-Rrs(672), H∆ = Rrs(555)-{Rrs(751) + (751-555)/(751-488) × [Rrs(488)-Rrs(751)]}, SCI = HChla-H∆ Shen, 2010 Coastal
ASA image-00030312152813412 Jiang, 2020 Coastal
TC2 image-00030312152928782 Liu,2020 Coastal, inversion based
NIR-Red image-00030312153111284 Gons,2005 Cosatal
MDN NN Pahlevan 2020 Hyperspectral,Coastal
OWT image-00030312153858028 Neil, 2019 Coastal

There are a lot of Chla algorithm.

Possibly, it is almost out of date.

Just JO I think hhh.

An interesting paper

Progressive scheme for blending empirical ocean color retrievals of absorption coefficient and chlorophyll concentration from open oceans to highly turbid waters

Former Classification scheme is based on value or shape. It is a hard transaction, not smoothly.

One way is use fuzzy c-mean, given隶属度(MD，这还是这么久了我第一次见到不会用英语的专业名词).But it is statistically based, don't have any implicit physics.

This is a paper have implicit physics.