The of the method to HICO, MODIS and

The in situ measurements were obtained from different areas
at different seasons around the world, which include ponds in the state of
Mississippi, U.S.A. (MS), Lake Taihu, China (LT), and Lake Erie, U.S.A. (LE).

Mississippi Pond dataset (MS): This dataset includes 41
samples of remote sensing reflectance (Rrs(?), sr?1) and absorption
coefficients of phytoplankton (aph(?), m?1), non-algal particles
(ad(?)), and gelbstoff (ag(?)). This dataset (see Mishra et al. 18
for details) was collected from a series of highly turbid and productive
aquaculture ponds at various bloom stages (initiation, peak, and senescence) of
cyanobacteria (Chl-a concentration varied from 59 to 1377 mg?m?3),
located in northwestern Mississippi, U.S.A., where cyanobacteria blooms with Planktothrix agardhii as the most
abundant species were occurring when the in situ data were collected

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Lake Taihu dataset (LT): This dataset includes 45 Rrs(?) spectra, corresponding spectra of ad(?), ag(?), and aph(?) (350–750 nm) collected from Lake
Taihu, China under cyanobacteria bloom conditions (Chl-a: 10–222 mg·m?3)
where the dominant species was Microcystis
aeruginosa. Water samples and optical data of surface water were collected
during two surveys in January–August 2011 and November 2011, respectively.

Lake Erie dataset (LE): This dataset is composed of 36 Rrs(?), ad(?), ag(?), and aph(?)
samples, and 20 Chl-a and PC concentrations. Cyanobacteria blooms dominated by Microcystis aeruginosa have been seasonally reoccurring in the western basin of
Lake Erie since the mid-1990s 19. The field measurements were collected
during cruises from 20–23 August 2013 and 18–21 August 2014 in western Lake
Erie at 16 and 20 stations, respectively, during the peak cyanobacteria bloom
period 20,21, with chlorophyll concentrations ranging from >1 to 100s of mg·m?3.

Since the ponds are too small for the MODIS and MERIS 1 km
spatial resolution imagery, Lake Erie was selected as a local example for
application of the method to HICO, MODIS and MERIS imageries to obtain pigment
concentrations and Gaussian absorption distribution. The cyanobacteria bloom
which occurred in Lake Erie in August 2014 was one of the most serious, causing
disruption to the drinking water supply in Toledo, U.S.A. The 2014 cruise was
conducted during this event and the sampling locations along with the Chl-a and
PC concentrations at each station, are shown in Figure 1, where PC
concentrations as high as ~200 mg?m?3 were noted in the southern
portion of Lake Erie.