Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements; Global Biogeochemical Cycles; Vol. 31, iss. 7
| Parent link: | Global Biogeochemical Cycles.— , 1987- Vol. 31, iss. 7.— 2017.— [P. 1173-1191] |
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| Corporate Authors: | , |
| Other Authors: | , , , , , , , , , , , |
| Summary: | Title screen This large-scale quasi-synoptic study gives a comprehensive picture of sea-air CO2 fluxes during the melt season in the central and outer Laptev Sea (LS) and East Siberian Sea (ESS). During a 7 week cruise we compiled a continuous record of both surface water and air CO2 concentrations, in total 76,892 measurements. Overall, the central and outer parts of the ESAS constituted a sink for CO2, and we estimate a median uptake of 9.4 g C m-2 yr-1 or 6.6 Tg C yr-1. Our results suggest that while the ESS and shelf break waters adjacent to the LS and ESS are net autotrophic systems, the LS is a net heterotrophic system. CO2 sea-air fluxes for the LS were 4.7 g C m-2 yr-1, and for the ESS we estimate an uptake of 7.2 g C m-2 yr-1. Isotopic composition of dissolved inorganic carbon ([sigma]13CDIC and [sigma]13CCO2) in the water column indicates that the LS is depleted in [sigma]13CDICcompared to the Arctic Ocean (ArcO) and ESS with an offset of 0.5‰ which can be explained by mixing of [sigma]13CDIC-depleted riverine waters and 4.0 Tg yr-1 respiration of OCter; only a minor part (0.72 Tg yr-1) of this respired OCter is exchanged with the atmosphere. Property-mixing diagrams of total organic carbon and isotope ratio ([sigma]13CSPE-DOC) versus dissolved organic carbon (DOC) concentration diagram indicate conservative and nonconservative mixing in the LS and ESS, respectively. We suggest land-derived particulate organic carbon from coastal erosion as an additional significant source for the depleted [sigma]13CDIC. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2017
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1002/2017GB005656 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656483 |
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| 200 | 1 | |a Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements |f C. Humborg [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: p. 1189-1191 (56 tit.)] | ||
| 330 | |a This large-scale quasi-synoptic study gives a comprehensive picture of sea-air CO2 fluxes during the melt season in the central and outer Laptev Sea (LS) and East Siberian Sea (ESS). During a 7 week cruise we compiled a continuous record of both surface water and air CO2 concentrations, in total 76,892 measurements. Overall, the central and outer parts of the ESAS constituted a sink for CO2, and we estimate a median uptake of 9.4 g C m-2 yr-1 or 6.6 Tg C yr-1. Our results suggest that while the ESS and shelf break waters adjacent to the LS and ESS are net autotrophic systems, the LS is a net heterotrophic system. CO2 sea-air fluxes for the LS were 4.7 g C m-2 yr-1, and for the ESS we estimate an uptake of 7.2 g C m-2 yr-1. Isotopic composition of dissolved inorganic carbon ([sigma]13CDIC and [sigma]13CCO2) in the water column indicates that the LS is depleted in [sigma]13CDICcompared to the Arctic Ocean (ArcO) and ESS with an offset of 0.5‰ which can be explained by mixing of [sigma]13CDIC-depleted riverine waters and 4.0 Tg yr-1 respiration of OCter; only a minor part (0.72 Tg yr-1) of this respired OCter is exchanged with the atmosphere. Property-mixing diagrams of total organic carbon and isotope ratio ([sigma]13CSPE-DOC) versus dissolved organic carbon (DOC) concentration diagram indicate conservative and nonconservative mixing in the LS and ESS, respectively. We suggest land-derived particulate organic carbon from coastal erosion as an additional significant source for the depleted [sigma]13CDIC. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Global Biogeochemical Cycles |d 1987- | ||
| 463 | |t Vol. 31, iss. 7 |v [P. 1173-1191] |d 2017 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a Восточно-Сибирский шельф | |
| 610 | 1 | |a Арктика | |
| 610 | 1 | |a морской воздух | |
| 610 | 1 | |a море Лаптевых | |
| 610 | 1 | |a Восточно-Сибирское море | |
| 701 | 1 | |a Humborg |b C. |g Christoph | |
| 701 | 1 | |a Geibel |b M. C. |g Marc | |
| 701 | 1 | |a Anderson |b L. G. |g Leif | |
| 701 | 1 | |a Bjork |b G. |g Goran | |
| 701 | 1 | |a Morth |b C.-M. |g Carl-Magnus | |
| 701 | 1 | |a Sundbom |b M. |g Marcus | |
| 701 | 1 | |a Thornton |b B. F. |g Brett | |
| 701 | 1 | |a Deutsch |b B. |g Barbara | |
| 701 | 1 | |a Gustafsson |b E. |g Erik | |
| 701 | 1 | |a Gustafsson |b B. |g Bo | |
| 701 | 1 | |a Ek |b Jo. |g Jorgen | |
| 701 | 1 | |a Semiletov |b I. P. |c geographer |c Professor of Tomsk Polytechnic University, doctor of geographical Sciences |f 1955- |g Igor Petrovich |3 (RuTPU)RU\TPU\pers\34220 | |
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| 856 | 4 | |u http://dx.doi.org/10.1002/2017GB005656 | |
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