lab 9 hydrolight and ecolight. ex. 1: inputing measured chl(z) data
TRANSCRIPT
Lab 9
Hydrolight and Ecolight
Ex. 1: Inputing measured Chl(z) data
405425
445465
485505
525545
565585
605625
645665
6850.00E+00
1.00E-03
2.00E-03
3.00E-03
4.00E-03
5.00E-03
6.00E-03
Rrs vs Wavelength
Rrs_NewRrs_classic
Wavelength (λ) nm
Rrs
(1/s
r)
Ex. 2: inputting IOPs from a, c, and bb sensors
Ex. 3: simulating Case 2 water
• Increased mineral concentration increases Rrs in the 550nm wavelengths.
410 430 450 470 490 510 530 550 570 590 610 630 650 670 6900.00E+00
2.00E-03
4.00E-03
6.00E-03
8.00E-03
1.00E-02
1.20E-02
1.40E-02
Rrs as a Function of λ and Mineral Concentration
00.250.512510
Wavelength (λ)
Rrs
(1/s
r)
Ex. 3: simulating Case 2 water
• Influence of the mineral composition on the Rrs
Ex. 4: simulating optically shallow water
410 430 450 470 490 510 530 550 570 590 610 630 650 670 6900.00E+00
5.00E-03
1.00E-02
1.50E-02
2.00E-02
2.50E-02
3.00E-02
3.50E-02
4.00E-02
4.50E-02
Rrs vs. Wavelength
5m10m20m30m30m_infinite
Wavelength (nm)
Rrs
(1/s
r)
1 2 3 4 5 68.10E-02
8.20E-02
8.30E-02
8.40E-02
8.50E-02
8.60E-02
8.70E-02
8.80E-02
Kd (550 nm) vs. depth
kd_5mkd_10mkd_20mKd_30m
Depth (m)
Kd (m
-1)
0.0053.005
6.0059.005
12.005
15.005
18.005
21.005
24.005
27.005
30.005
-8.00E-02
-6.00E-02
-4.00E-02
-2.00E-02
0.00E+00
2.00E-02
4.00E-02
6.00E-02
Klu (550 nm) vs. depth
Klu_5mKlu_10mKlu_20mKlu_30m
Depth (m)
Klu
(m-1
)
Ex. 5: Hydrolight User Support
• Customer complained about bad Rrs curve
• Supplied AC9 input file– Obviously bad data
existed in file
• Uncorrected customer curve did not match curve customer reported
• Did the customer even use his own bad data?
Ex. 5: Apparently Not
400 450 500 550 600 650 7000.00E+00
5.00E-04
1.00E-03
1.50E-03
2.00E-03
2.50E-03
3.00E-03
3.50E-03
4.00E-03
Origwrong acfixed problem
Playing with our own data…
Measurements and Hydrolight comparison
Predicted vs. Measured Rrs
HydroLight Input:
Parameter Value Instrument Date
Absorption (a) 0.8 – 0.0 m-1 ACS 7/10
Attenuation (c) 4.0 – 2.0 m-1 ACS 7/10
bb/b 0.01 BB9 & AC9 7/11
Chlorophyll 2.3 mg/m3 Extraction method 7/12
CDOM Variable ACS with Filter 7/10
Depth 5 meters Guess -
a* Curt’s File (astarchl) - -
Clouds 10% Eye 7/15
Bottom Type Dark Sediment Guess -
Wind Speed 2.0 m Guess 7/15
Predicted vs. Measured Rrs
400 450 500 550 600 650 7000.00E+00
1.00E-03
2.00E-03
3.00E-03
4.00E-03
5.00E-03
6.00E-03
7.00E-03
8.00E-03
9.00E-03HydroLightMeasured
Wavelength (nm)
Rrs
(sr
-1)
Reasonable, given that measurements were taken over a week long period (not ready to ask for my money back yet).
Captures the high absorption of CDOM in the blue, something not capture by the case 1 models.