Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements

Sea-air exchange patterns along the central and outer East Siberian Arctic Shelf as inferred from continuous CO2, stable isotope, and bulk chemistry measurements

Bibliographic Details
Parent link:	Global Biogeochemical Cycles.— , 1987- Vol. 31, iss. 7.— 2017.— [P. 1173-1191]
Corporate Authors:	Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ), Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ) Международная научно-образовательная лаборатория изучения углерода арктических морей (МНОЛ ИУАМ)
Other Authors:	Humborg C. Christoph, Geibel M. C. Marc, Anderson L. G. Leif, Bjork G. Goran, Morth C.-M. Carl-Magnus, Sundbom M. Marcus, Thornton B. F. Brett, Deutsch B. Barbara, Gustafsson E. Erik, Gustafsson B. Bo, Ek Jo. Jorgen, Semiletov I. P. Igor Petrovich
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
Published:	2017
Subjects:	электронный ресурс труды учёных ТПУ Восточно-Сибирский шельф Арктика морской воздух море Лаптевых Восточно-Сибирское море
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

Internet

http://dx.doi.org/10.1002/2017GB005656