Contribution to a bio-optical model for remote sensing of Lena River water
Bio-optical measurements and sampling were carried out in the delta of the Lena River (northern Siberia, Russia) between 26 June and 4 July 2011. The aim of this study was to determine the inherent optical properties of the Lena water, i.e., absorption, attenuation, and scattering coefficients, duri...
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fthzgzmk:oai:publications.hereon.de:31158 2023-06-11T04:09:59+02:00 Contribution to a bio-optical model for remote sensing of Lena River water Oerek, H. Doerffer, R. Roettgers, R. Boersma, M. Wiltshire, K.H. 2013 https://publications.hereon.de/id/31158 https://publications.hzg.de/id/31158 https://doi.org/10.5194/bg-10-7081-2013 en eng EGU - Copernicus Publication http://dx.doi.org/10.5194/bg-10-7081-2013 urn:issn:1726-4170 https://publications.hereon.de/id/31158 https://publications.hzg.de/id/31158 info:eu-repo/semantics/openAccess open_access oa_gold issn:1726-4170 Oerek, H.; Doerffer, R.; Roettgers, R.; Boersma, M.; Wiltshire, K.H.: Contribution to a bio-optical model for remote sensing of Lena River water. In: Biogeosciences. Vol. 10 (2013) 11, 7081 - 7094. (DOI:10.5194/bg-10-7081-2013) info:eu-repo/classification/ddc/551 info:eu-repo/semantics/article Zeitschrift Artikel 2013 fthzgzmk https://doi.org/10.5194/bg-10-7081-2013 2023-05-28T23:23:43Z Bio-optical measurements and sampling were carried out in the delta of the Lena River (northern Siberia, Russia) between 26 June and 4 July 2011. The aim of this study was to determine the inherent optical properties of the Lena water, i.e., absorption, attenuation, and scattering coefficients, during the period of maximum runoff. This aimed to contribute to the development of a bio-optical model for use as the basis for optical remote sensing of coastal water of the Arctic. In this context the absorption by CDOM (colored dissolved organic matter) and particles, and the concentrations of total suspended matter, phytoplankton-pigments, and carbon were measured. CDOM was found to be the most dominant parameter affecting the optical properties of the river, with an absorption coefficient of 4.5–5 m−1 at 442 nm, which was almost four times higher than total particle absorption values at visible wavelength range. The wavelenght-dependence of absorption of the different water constituents was chracterized by determining the semi logarithmic spectral slope. Mean CDOM, and detritus slopes were 0.0149 nm−1(standard deviation (stdev) = 0.0003, n = 18), and 0.0057 nm−1 (stdev = 0.0017, n = 19), respectively, values which are typical for water bodies with high concentrations of dissolved and particulate carbon. Mean chlorophyll a and total suspended matter were 1.8 mg m−3 (stdev = 0.734 n = 18) and 31.9 g m−3 (stdev = 19.94, n = 27), respectively. DOC (dissolved organic carbon) was in the range 8–10 g m−3 and the total particulate carbon (PC) in the range 0.25–1.5 g m−3. The light penetration depth (Secchi disc depth) was in the range 30–90 cm and was highly correlated with the suspended matter concentration. The period of maximum river runoff in June was chosen to obtain bio-optical data when maximum water constituents are transported into the Laptev Sea. However, we are aware that more data from other seasons and other years need to be collected to establish a general bio-optical model of the Lena water and conclusively ... Article in Journal/Newspaper Arctic laptev Laptev Sea lena river Phytoplankton Siberia Hereon Publications (Helmholtz-Zentrum) Arctic Laptev Sea Biogeosciences 10 11 7081 7094 |
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Open Polar |
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Hereon Publications (Helmholtz-Zentrum) |
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English |
topic |
info:eu-repo/classification/ddc/551 |
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info:eu-repo/classification/ddc/551 Oerek, H. Doerffer, R. Roettgers, R. Boersma, M. Wiltshire, K.H. Contribution to a bio-optical model for remote sensing of Lena River water |
topic_facet |
info:eu-repo/classification/ddc/551 |
description |
Bio-optical measurements and sampling were carried out in the delta of the Lena River (northern Siberia, Russia) between 26 June and 4 July 2011. The aim of this study was to determine the inherent optical properties of the Lena water, i.e., absorption, attenuation, and scattering coefficients, during the period of maximum runoff. This aimed to contribute to the development of a bio-optical model for use as the basis for optical remote sensing of coastal water of the Arctic. In this context the absorption by CDOM (colored dissolved organic matter) and particles, and the concentrations of total suspended matter, phytoplankton-pigments, and carbon were measured. CDOM was found to be the most dominant parameter affecting the optical properties of the river, with an absorption coefficient of 4.5–5 m−1 at 442 nm, which was almost four times higher than total particle absorption values at visible wavelength range. The wavelenght-dependence of absorption of the different water constituents was chracterized by determining the semi logarithmic spectral slope. Mean CDOM, and detritus slopes were 0.0149 nm−1(standard deviation (stdev) = 0.0003, n = 18), and 0.0057 nm−1 (stdev = 0.0017, n = 19), respectively, values which are typical for water bodies with high concentrations of dissolved and particulate carbon. Mean chlorophyll a and total suspended matter were 1.8 mg m−3 (stdev = 0.734 n = 18) and 31.9 g m−3 (stdev = 19.94, n = 27), respectively. DOC (dissolved organic carbon) was in the range 8–10 g m−3 and the total particulate carbon (PC) in the range 0.25–1.5 g m−3. The light penetration depth (Secchi disc depth) was in the range 30–90 cm and was highly correlated with the suspended matter concentration. The period of maximum river runoff in June was chosen to obtain bio-optical data when maximum water constituents are transported into the Laptev Sea. However, we are aware that more data from other seasons and other years need to be collected to establish a general bio-optical model of the Lena water and conclusively ... |
format |
Article in Journal/Newspaper |
author |
Oerek, H. Doerffer, R. Roettgers, R. Boersma, M. Wiltshire, K.H. |
author_facet |
Oerek, H. Doerffer, R. Roettgers, R. Boersma, M. Wiltshire, K.H. |
author_sort |
Oerek, H. |
title |
Contribution to a bio-optical model for remote sensing of Lena River water |
title_short |
Contribution to a bio-optical model for remote sensing of Lena River water |
title_full |
Contribution to a bio-optical model for remote sensing of Lena River water |
title_fullStr |
Contribution to a bio-optical model for remote sensing of Lena River water |
title_full_unstemmed |
Contribution to a bio-optical model for remote sensing of Lena River water |
title_sort |
contribution to a bio-optical model for remote sensing of lena river water |
publisher |
EGU - Copernicus Publication |
publishDate |
2013 |
url |
https://publications.hereon.de/id/31158 https://publications.hzg.de/id/31158 https://doi.org/10.5194/bg-10-7081-2013 |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic laptev Laptev Sea lena river Phytoplankton Siberia |
genre_facet |
Arctic laptev Laptev Sea lena river Phytoplankton Siberia |
op_source |
issn:1726-4170 Oerek, H.; Doerffer, R.; Roettgers, R.; Boersma, M.; Wiltshire, K.H.: Contribution to a bio-optical model for remote sensing of Lena River water. In: Biogeosciences. Vol. 10 (2013) 11, 7081 - 7094. (DOI:10.5194/bg-10-7081-2013) |
op_relation |
http://dx.doi.org/10.5194/bg-10-7081-2013 urn:issn:1726-4170 https://publications.hereon.de/id/31158 https://publications.hzg.de/id/31158 |
op_rights |
info:eu-repo/semantics/openAccess open_access oa_gold |
op_doi |
https://doi.org/10.5194/bg-10-7081-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
11 |
container_start_page |
7081 |
op_container_end_page |
7094 |
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1768384041874096128 |