Convoluted remote sensing reflectance obtained from spectral underwater upwelling radiance and solar downwelling irradiance measurements during POLARSTERN cruise ARK-XXVI/3 (PS78)


Remote sensing reflectance (RRS) at each station was obtained from profiles of upwelling radiance (Lu-( lamda)) and downwelling solar irradiance (Ed-(lamda)) measured with hyperspectral radiometers (RAMSES, TriOS GmbH, Germany) from 320 to 950 nm (3.3 nm optical resolution, spectral accuracy of 0.3 nm) . We used the same instrumentation, operation procedure and data analysis as in Taylor et al. (2011, doi:10.5194/bg-8-3609-2011) where we followed the NASA protocols (Mueller et al. 2003). This includes a correction for variation in above water solar irradiance (Ed+( lamda)) during profiling and excludes Lu-( lamda) and Ed-( lamda) data at depths which are still influenced by surface waves. Analogously to Stramski et al. (2008, doi:10.5194/bg-5-171-2008), we calculated Lu-( lamda, 0m) and Ed-( lamda, 0m) by extrapolating Lu-( lamda, z) and Ed-( lamda, z), respectively, from below the surface waves (at depth z) using the average upwelling radiance attenuation coefficient for a depth interval between 1 to 11 m, and then derived RRS(lamda) from 0.519 × Lu-( lamda, 0 m)/Ed-( lamda, 0 m). Data were interpolated on a 1nm grid ( and then convoluted using a FWHM 10nm Gaussian slit reflecting the instrument resolution (

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Metadata Access
Creator Bracher, Astrid; Gonçalves-Araujo, Rafael; Dinter, Tilman; Cherkasheva, Alexandra
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Contributor Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
Publication Year 2018
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 6817 data points
Discipline Earth System Research
Spatial Coverage (-130.030W, 79.148S, 60.738E, 89.965N); Arctic Ocean; Laptev Sea
Temporal Coverage Begin 2011-08-21T13:56:22Z
Temporal Coverage End 2011-09-25T06:10:48Z