Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River
River water is the main source of dissolved organic carbon (DOC) in the Arctic Ocean. DOC plays and important role in the Arctic carbon cycle and its export from land to sea is expected to increase with accelerated permafrost thaw with ongoing climate change. However, transport ways and transformati...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.898813 2023-05-15T15:04:56+02:00 Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River Juhls, Bennet Hölemann, Jens A Heim, Birgit Overduin, Pier Paul Gonçalves-Araujo, Rafael Hieronymi, Martin Fischer, Jürgen MEDIAN LATITUDE: 73.769488 * MEDIAN LONGITUDE: 126.269514 * SOUTH-BOUND LATITUDE: 71.502700 * WEST-BOUND LONGITUDE: 110.007700 * NORTH-BOUND LATITUDE: 78.519500 * EAST-BOUND LONGITUDE: 137.004400 * DATE/TIME START: 2010-08-04T00:00:00 * DATE/TIME END: 2019-07-20T00:00:00 2019-02-26 application/zip, 11 datasets https://doi.pangaea.de/10.1594/PANGAEA.898813 https://doi.org/10.1594/PANGAEA.898813 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.898813 https://doi.org/10.1594/PANGAEA.898813 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Juhls, Bennet; Overduin, Pier Paul; Hölemann, Jens A; Hieronymi, Martin; Matsuoka, Atsushi; Heim, Birgit; Fischer, Jürgen (2019): Dissolved organic matter at the fluvial–marine transition in the Laptev Sea using in situ data and ocean colour remote sensing. Biogeosciences, 16(13), 2693-2713, https://doi.org/10.5194/bg-16-2693-2019 AWI_Envi AWI_Perma Laptev Sea System LSS Permafrost Research Polar Terrestrial Environmental Systems @ AWI Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.898813 https://doi.org/10.5194/bg-16-2693-2019 2023-01-20T07:34:18Z River water is the main source of dissolved organic carbon (DOC) in the Arctic Ocean. DOC plays and important role in the Arctic carbon cycle and its export from land to sea is expected to increase with accelerated permafrost thaw with ongoing climate change. However, transport ways and transformation of DOC is mostly unknown. The absorption coefficient by colored dissolved organic matter (aCDOM) which can be used to estimate DOC concentration. In this study, we compiled DOC and aCDOM samples from 11 expeditions covering river, coastal and offshore waters. Water samples for DOC analysis were filtered through 0.7µm GF/F filter and acidified with 25 µL HCl suprapur (10 M) right after sampling. Samples were stored cool and dark for transport. DOC concentrations were measured using high temperature catalytic oxidation (TOC-VCPH, Shimadzu). Three measurements of each sample were averaged and after each 10 samples, a blank and a standard (Battle-02, Mauri-09 or Super-05 certified reference material from National Laboratory for Environmental Testing, Canada) were measured to sustain a quality control. Samples for aCDOM(λ) analysis were filtered through 0.22 µm Millipore GSWP filters (Gonçalves-Araujo et al., 2015, Lena 2016, Bykovksy 2017) or 0.7 µm Whatman GF/F (LD10, YS11, VB13, VB14, Lena 2014, Lena 2015) right after sampling. 100 ml filtrate was stored cool and dark in amber glass bottles until further analysis. aCDOM(λ) was measured with spectrophotometer (SPECORD 200, Analytik Jena) by measuring the absorbance (Aλ) in 1 nm intervals between 200 and 750 nm. The resulting absorbance measurements were then applied to a standard equation aCDOM (λ)=(2.303*A_λ)/L, where L is the path length (length of cuvette), to calculate the aCDOM(λ). Fresh Milli-Q water was used as reference. The cuvette length varied depending on the expected absorption in the sampled water (1 or 5 cm for river or coastal waters, 5 or 10 cm for offshore shelf waters). Resulting aCDOM spectra were corrected for baseline offsets by subtracting the ... Dataset Arctic Arctic Ocean Climate change laptev Laptev Sea lena river permafrost PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Laptev Sea Canada ENVELOPE(110.007700,137.004400,78.519500,71.502700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Envi AWI_Perma Laptev Sea System LSS Permafrost Research Polar Terrestrial Environmental Systems @ AWI |
spellingShingle |
AWI_Envi AWI_Perma Laptev Sea System LSS Permafrost Research Polar Terrestrial Environmental Systems @ AWI Juhls, Bennet Hölemann, Jens A Heim, Birgit Overduin, Pier Paul Gonçalves-Araujo, Rafael Hieronymi, Martin Fischer, Jürgen Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
topic_facet |
AWI_Envi AWI_Perma Laptev Sea System LSS Permafrost Research Polar Terrestrial Environmental Systems @ AWI |
description |
River water is the main source of dissolved organic carbon (DOC) in the Arctic Ocean. DOC plays and important role in the Arctic carbon cycle and its export from land to sea is expected to increase with accelerated permafrost thaw with ongoing climate change. However, transport ways and transformation of DOC is mostly unknown. The absorption coefficient by colored dissolved organic matter (aCDOM) which can be used to estimate DOC concentration. In this study, we compiled DOC and aCDOM samples from 11 expeditions covering river, coastal and offshore waters. Water samples for DOC analysis were filtered through 0.7µm GF/F filter and acidified with 25 µL HCl suprapur (10 M) right after sampling. Samples were stored cool and dark for transport. DOC concentrations were measured using high temperature catalytic oxidation (TOC-VCPH, Shimadzu). Three measurements of each sample were averaged and after each 10 samples, a blank and a standard (Battle-02, Mauri-09 or Super-05 certified reference material from National Laboratory for Environmental Testing, Canada) were measured to sustain a quality control. Samples for aCDOM(λ) analysis were filtered through 0.22 µm Millipore GSWP filters (Gonçalves-Araujo et al., 2015, Lena 2016, Bykovksy 2017) or 0.7 µm Whatman GF/F (LD10, YS11, VB13, VB14, Lena 2014, Lena 2015) right after sampling. 100 ml filtrate was stored cool and dark in amber glass bottles until further analysis. aCDOM(λ) was measured with spectrophotometer (SPECORD 200, Analytik Jena) by measuring the absorbance (Aλ) in 1 nm intervals between 200 and 750 nm. The resulting absorbance measurements were then applied to a standard equation aCDOM (λ)=(2.303*A_λ)/L, where L is the path length (length of cuvette), to calculate the aCDOM(λ). Fresh Milli-Q water was used as reference. The cuvette length varied depending on the expected absorption in the sampled water (1 or 5 cm for river or coastal waters, 5 or 10 cm for offshore shelf waters). Resulting aCDOM spectra were corrected for baseline offsets by subtracting the ... |
format |
Dataset |
author |
Juhls, Bennet Hölemann, Jens A Heim, Birgit Overduin, Pier Paul Gonçalves-Araujo, Rafael Hieronymi, Martin Fischer, Jürgen |
author_facet |
Juhls, Bennet Hölemann, Jens A Heim, Birgit Overduin, Pier Paul Gonçalves-Araujo, Rafael Hieronymi, Martin Fischer, Jürgen |
author_sort |
Juhls, Bennet |
title |
Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
title_short |
Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
title_full |
Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
title_fullStr |
Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
title_full_unstemmed |
Surface water Dissolved Organic Matter (DOC, CDOM) in the Laptev Sea and Lena River |
title_sort |
surface water dissolved organic matter (doc, cdom) in the laptev sea and lena river |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.898813 https://doi.org/10.1594/PANGAEA.898813 |
op_coverage |
MEDIAN LATITUDE: 73.769488 * MEDIAN LONGITUDE: 126.269514 * SOUTH-BOUND LATITUDE: 71.502700 * WEST-BOUND LONGITUDE: 110.007700 * NORTH-BOUND LATITUDE: 78.519500 * EAST-BOUND LONGITUDE: 137.004400 * DATE/TIME START: 2010-08-04T00:00:00 * DATE/TIME END: 2019-07-20T00:00:00 |
long_lat |
ENVELOPE(110.007700,137.004400,78.519500,71.502700) |
geographic |
Arctic Arctic Ocean Laptev Sea Canada |
geographic_facet |
Arctic Arctic Ocean Laptev Sea Canada |
genre |
Arctic Arctic Ocean Climate change laptev Laptev Sea lena river permafrost |
genre_facet |
Arctic Arctic Ocean Climate change laptev Laptev Sea lena river permafrost |
op_source |
Supplement to: Juhls, Bennet; Overduin, Pier Paul; Hölemann, Jens A; Hieronymi, Martin; Matsuoka, Atsushi; Heim, Birgit; Fischer, Jürgen (2019): Dissolved organic matter at the fluvial–marine transition in the Laptev Sea using in situ data and ocean colour remote sensing. Biogeosciences, 16(13), 2693-2713, https://doi.org/10.5194/bg-16-2693-2019 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.898813 https://doi.org/10.1594/PANGAEA.898813 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.898813 https://doi.org/10.5194/bg-16-2693-2019 |
_version_ |
1766336720362536960 |