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Article

CDOM Optical Properties and DOC Content in the Largest Mixing Zones of the Siberian Shelf Seas

1
Shirshov Institute of Oceanology, Russian Academy of Sciences, 117997 Moscow, Russia
2
K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, 127276 Moscow, Russia
3
Department of Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Giacomo De Carolis
Remote Sens. 2021, 13(6), 1145; https://doi.org/10.3390/rs13061145
Received: 26 January 2021 / Revised: 12 March 2021 / Accepted: 14 March 2021 / Published: 17 March 2021
(This article belongs to the Special Issue Remote Sensing of the Aquatic Environments)
Notable changes in the Arctic ecosystem driven by increased atmospheric temperature and ice cover reduction were observed in the last decades. Ongoing environmental shifts affect freshwater discharge to the Arctic Ocean, and alter Arctic land-ocean fluxes. The monitoring of DOC distribution and CDOM optical properties is of great interest both from the point of view of validation of remote sensing models, and for studying organic carbon transformation and dynamics. In this study we report the DOC concentrations and CDOM optical characteristics in the mixing zones of the Ob, Yenisei, Khatanga, Lena, Kolyma, and Indigirka rivers. Water sampling was performed in August–October 2015 and 2017. The DOC was determined by high-temperature combustion, and absorption coefficients and spectroscopic indices were calculated using the seawater absorbance obtained with spectrophotometric measurements. Kara and Laptev mixing zones were characterized by conservative DOC behavior, while the East Siberian sea waters showed nonconservative DOC distribution. Dominant DOM sources are discussed. The absorption coefficient aCDOM (350) in the East Siberian Sea was two-fold lower compared to Kara and Laptev seawaters. For the first time we report the DOC content in the Khatanga River of 802.6 µM based on the DOC in the Khatanga estuary. View Full-Text
Keywords: CDOM absorbance; spectroscopic indices; DOC; Arctic; shelf seas; estuarial and coastal areas CDOM absorbance; spectroscopic indices; DOC; Arctic; shelf seas; estuarial and coastal areas
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MDPI and ACS Style

Drozdova, A.N.; Nedospasov, A.A.; Lobus, N.V.; Patsaeva, S.V.; Shchuka, S.A. CDOM Optical Properties and DOC Content in the Largest Mixing Zones of the Siberian Shelf Seas. Remote Sens. 2021, 13, 1145. https://doi.org/10.3390/rs13061145

AMA Style

Drozdova AN, Nedospasov AA, Lobus NV, Patsaeva SV, Shchuka SA. CDOM Optical Properties and DOC Content in the Largest Mixing Zones of the Siberian Shelf Seas. Remote Sensing. 2021; 13(6):1145. https://doi.org/10.3390/rs13061145

Chicago/Turabian Style

Drozdova, Anastasia N., Andrey A. Nedospasov, Nikolay V. Lobus, Svetlana V. Patsaeva, and Sergey A. Shchuka 2021. "CDOM Optical Properties and DOC Content in the Largest Mixing Zones of the Siberian Shelf Seas" Remote Sensing 13, no. 6: 1145. https://doi.org/10.3390/rs13061145

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