The Determination of the Diffuse Attenuation Coefficient of Sea Water Using the Coastal Zone Color Scanner

Austin, R. W.; Petzold, T. J.

doi:10.1007/978-1-4613-3315-9_29

Cited by 159 publications

(118 citation statements)

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“…Method 1: Direct One-Step Empirical Relationship for K d (490) [7] In the approach developed by Petzold [1981, 1986], K d (490) is the key for estimating K d at other wavelengths. Pioneered by Austin and Petzold [1981], the simplest method to estimate K d (490) is the empirical relation between K d (490) and the ratio of water-leaving radiances at two wavelengths within the blue-green spectral region:…”

Section: Methods For Derivingmentioning

confidence: 99%

“…In Austin and Petzold [1981], l 1 = 443 nm and l 2 = 550 nm. K w (490) is the attenuation coefficient associated with pure seawater [Austin and Petzold, 1981;Morel, 1988;Smith and Baker, 1981], and A and B are algorithm constants.…”

Section: Methods For Derivingmentioning

confidence: 99%

“…K w (490) is the attenuation coefficient associated with pure seawater [Austin and Petzold, 1981;Morel, 1988;Smith and Baker, 1981], and A and B are algorithm constants. Recently, for the purpose of estimating K d (490) from SeaViewing Wide Field-of-View Sensor (SeaWiFS) on the OrbView-2 satellite, Mueller and Trees [1997] and Mueller [2000] proposed the following algorithm for SeaWiFS:…”

Section: Methods For Derivingmentioning

confidence: 99%

“…In method 1, K d (490) ( K d at l = 490 nm) is estimated from an empirical algorithm based on the relationship between K d (490) and the blue-to-green ratio of water-leaving radiance, L w , or remote sensing reflectance, R rs [Austin and Petzold, 1981;Mueller, 2000]. This K d (490) value can then be used to estimate K d at other wavelengths from empirical relationships between K d (490) and K d (l) [Austin and Petzold, 1986].…”

Section: Introductionmentioning

confidence: 99%

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Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods

et al. 2005

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[1] The propagation of downwelling irradiance at wavelength l from surface to a depth (z) in the ocean is governed by the diffuse attenuation coefficient, K d (l). There are two standard methods for the derivation of K d (l) in remote sensing, which both are based on empirical relationships involving the blue-to-green ratio of ocean color. Recently, a semianalytical method to derive K d (l) from reflectance has also been developed. In this study, using K d (490) and K d (443) as examples, we compare the K d (l) values derived from the three methods using data collected in three different regions that cover oceanic and coastal waters, with K d (490) ranging from $0.04 to 4.0 m À1 . The derived values are compared with the data calculated from in situ measurements of the vertical profiles of downwelling irradiance. The comparisons show that the two standard methods produced satisfactory estimates of K d (l) in oceanic waters where attenuation is relatively low but resulted in significant errors in coastal waters. The newly developed semianalytical method appears to have no such limitation as it performed well for both oceanic and coastal waters. For all data in this study the average of absolute percentage difference between the in situ measured and the semianalytically derived K d is $14% for l = 490 nm and $11% for l = 443 nm.

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Section: Methods For Derivingmentioning

confidence: 99%

Section: Methods For Derivingmentioning

confidence: 99%

Section: Methods For Derivingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods

et al. 2005

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“…This is important for ocean color band ratio or single band algorithms, e.g. (Austin & Petzold, 1981;Salama et al, 2004). These algorithms are empirical in nature, i.e.…”

Section: Advantages and Limitations Of Error Estimation Methodsmentioning

confidence: 99%

Current Advances in Uncertainty Estimation of Earth Observation Products of Water Quality

Salama¹

2012

Earth Observation

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Remote sensing of normalized diffuse attenuation coefficient of downwelling irradiance

et al. 2016

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The diffuse attenuation of downwelling irradiance, Kd (m−1), is an important property related to light penetration and availability in aquatic ecosystems. The standard Kd(490) product (the diffuse attenuation coefficient at 490 nm) of the global oceans from satellite remote sensing has been produced with an empirical algorithm, which limits its reliability and applicability in coastal regions. More importantly, as an apparent optical property (AOP), Kd is a function of the angular distribution of the light field (e.g., solar zenith angle). The empirically derived product thus contains ambiguities when compared with in situ measurements as there is no specification regarding the corresponding solar zenith angle associated with this Kd(490) product. To overcome these shortcomings, we refined the Kd product with a product termed as the normalized diffuse attenuation coefficient (nKd, m−1), that is equivalent to the Kd in the absence of the atmosphere and with the sun at zenith. Models were developed to get nKd from both in situ measurements and ocean color remote sensing. Evaluations using field measurements indicated that the semianalytically derived nKd product will not only remove the ambiguities when comparing Kd values of different light fields but will also improve the quality of such a product, therefore maximizing the value offered by satellite ocean color remote sensing.

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The Determination of the Diffuse Attenuation Coefficient of Sea Water Using the Coastal Zone Color Scanner

Cited by 159 publications

References 3 publications

Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods

Diffuse attenuation coefficient of downwelling irradiance: An evaluation of remote sensing methods

Current Advances in Uncertainty Estimation of Earth Observation Products of Water Quality

Remote sensing of normalized diffuse attenuation coefficient of downwelling irradiance

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