Diffuse downwelling attenuation coefficients (Napierian) for Southern Ocean waters for wavelengths 290-700 nm
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2017
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| _version_ | 1867170077274537984 |
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| author | Collins, James R Marchetti, Adrian Ducklow, Hugh W Van Mooy, Benjamin A S |
| author_facet | Collins, James R Marchetti, Adrian Ducklow, Hugh W Van Mooy, Benjamin A S |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Diffuse downwelling attenuation coefficients in Napierian form (DAC down) for Southern Ocean waters for wavelengths 290-700 nm. Coefficients for 320-700 nm were calculated directly from depth profiles of in situ irradiance made with an Ocean Optics Jaz spectrophotometer at PAL-LTER Station B, Arthur Harbor, Antarctica. The station is a 75 m deep sampling location about 1 km offshore. Due to the low signal-to-noise ratio in the in situ irradiance observations at wavelengths < 320 nm, coefficients were estimated for 290-320 nm using an exponential model fit to observed data from the 320-370 nm interval: DAC down =e^(-0.0152 * lamda+3.84) To achieve minimum boat shadow while making the irradiance profile measurements, the fiber optic cable and light sensor (cosine corrector) were streamed away from the small boat in a direction that was both to windward and toward the sun; the boat was then allowed to drift downwind from the measurement location to a suitable stand-off distance. A series of concurrent surface irradiance measurements made with a LI-COR PAR sensor (model LI-193SA; LI-COR Biosciences, Lincoln, NE, USA) was used to correct the spectra made as part of these profiles for any changes in incident light intensity that occurred between measurements. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_879578 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Diffuse downwelling attenuation coefficients (Napierian) for Southern Ocean waters for wavelengths 290-700 nm Collins, James R Marchetti, Adrian Ducklow, Hugh W Van Mooy, Benjamin A S Arthur Harbour, Antarctica; Diffuse attenuation coefficient, downward; Monitoring station; MONS; Palmer_StationB; Wavelength Diffuse downwelling attenuation coefficients in Napierian form (DAC down) for Southern Ocean waters for wavelengths 290-700 nm. Coefficients for 320-700 nm were calculated directly from depth profiles of in situ irradiance made with an Ocean Optics Jaz spectrophotometer at PAL-LTER Station B, Arthur Harbor, Antarctica. The station is a 75 m deep sampling location about 1 km offshore. Due to the low signal-to-noise ratio in the in situ irradiance observations at wavelengths < 320 nm, coefficients were estimated for 290-320 nm using an exponential model fit to observed data from the 320-370 nm interval: DAC down =e^(-0.0152 * lamda+3.84) To achieve minimum boat shadow while making the irradiance profile measurements, the fiber optic cable and light sensor (cosine corrector) were streamed away from the small boat in a direction that was both to windward and toward the sun; the boat was then allowed to drift downwind from the measurement location to a suitable stand-off distance. A series of concurrent surface irradiance measurements made with a LI-COR PAR sensor (model LI-193SA; LI-COR Biosciences, Lincoln, NE, USA) was used to correct the spectra made as part of these profiles for any changes in incident light intensity that occurred between measurements. |
| title | Diffuse downwelling attenuation coefficients (Napierian) for Southern Ocean waters for wavelengths 290-700 nm |
| topic | Arthur Harbour, Antarctica; Diffuse attenuation coefficient, downward; Monitoring station; MONS; Palmer_StationB; Wavelength |
| url | https://doi.org/10.1594/PANGAEA.879578 |