Iodine isotopes species fingerprinting environmental conditions in surface water along the northeastern Atlantic Ocean

Peng He; Xiaolin Hou; Ala Aldahan; Göran Possnert; Peng Yi

doi:10.1038/srep02685

Iodine isotopes species fingerprinting environmental conditions in surface water along the northeastern Atlantic Ocean

Peng He
, Xiaolin Hou
, Ala Aldahan
, Göran Possnert
, Peng Yi

Department of Geoscience

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

Concentrations and species of iodine isotopes (127 I and 129 I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129 I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on 129 I and 127 I, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30and 50 N. The results show iodate as the predominant species in the analyzed marine waters for both 127 I and 129 I. Despite the rather constant ratios of 127 I - /127 IO 3 -, the 129 I - /129 IO 3 - values reveal variations that apparently response to sources, environmental conditions and residence time. These findings provide a new tracer approach that will strongly enhance the application of anthropogenic 129 I in ocean environments and impact on climate at the ocean boundary layer.

Original language	English
Article number	2685
Journal	Scientific reports
Volume	3
DOIs	https://doi.org/10.1038/srep02685
Publication status	Published - Nov 28 2013

ASJC Scopus subject areas

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title = "Iodine isotopes species fingerprinting environmental conditions in surface water along the northeastern Atlantic Ocean",

abstract = "Concentrations and species of iodine isotopes (127 I and 129 I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129 I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on 129 I and 127 I, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30and 50 N. The results show iodate as the predominant species in the analyzed marine waters for both 127 I and 129 I. Despite the rather constant ratios of 127 I - /127 IO 3 -, the 129 I - /129 IO 3 - values reveal variations that apparently response to sources, environmental conditions and residence time. These findings provide a new tracer approach that will strongly enhance the application of anthropogenic 129 I in ocean environments and impact on climate at the ocean boundary layer.",

author = "Peng He and Xiaolin Hou and Ala Aldahan and G{\"o}ran Possnert and Peng Yi",

note = "Funding Information: The authors thank the Swedish Polar Secretary and the Swedish Research Council For logistic and financial support. Thanks are also extended to the crew of the Icebreaker Oden for their continuous help and livelihood and to Anna Storm Sturevik for the generous help with the sampling onboard the ship. Funding Information: Samples collection. Surface seawater samples (47.4–31.1uN, 7.6–14.5uW) were collected in the North Atlantic Ocean from October to November, 2010 (Fig. 1a). The sampling transect was done onboard the Ice Breaker Oden during the passage from Sweden to Ponta Arenas (Chile) as part of the 2010/2011 Antarctica expedition jointly funded by the Swedish Polar Research Secretariat and the US National Science Foundation. Sampling was performed using a Teflon intake direct surface water sampling system that has been tested for possible memory effect and contamination62. At the same time an automatic continuous measurements of parameters such as salinity, temperature, and wind speed were conducted. Each 2-L sample was instantly filtered onboard through a 0.45 mm membrane (Sartorius AG, Gottingen, Germany) and filled in a clean polyethylene container under cold and dark conditions. All chemical reagents used were of analytical grade and all solutions were prepared using deionized water (18.2 MV?cm).",

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AU - He, Peng

AU - Hou, Xiaolin

AU - Aldahan, Ala

AU - Possnert, Göran

AU - Yi, Peng

N1 - Funding Information: The authors thank the Swedish Polar Secretary and the Swedish Research Council For logistic and financial support. Thanks are also extended to the crew of the Icebreaker Oden for their continuous help and livelihood and to Anna Storm Sturevik for the generous help with the sampling onboard the ship. Funding Information: Samples collection. Surface seawater samples (47.4–31.1uN, 7.6–14.5uW) were collected in the North Atlantic Ocean from October to November, 2010 (Fig. 1a). The sampling transect was done onboard the Ice Breaker Oden during the passage from Sweden to Ponta Arenas (Chile) as part of the 2010/2011 Antarctica expedition jointly funded by the Swedish Polar Research Secretariat and the US National Science Foundation. Sampling was performed using a Teflon intake direct surface water sampling system that has been tested for possible memory effect and contamination62. At the same time an automatic continuous measurements of parameters such as salinity, temperature, and wind speed were conducted. Each 2-L sample was instantly filtered onboard through a 0.45 mm membrane (Sartorius AG, Gottingen, Germany) and filled in a clean polyethylene container under cold and dark conditions. All chemical reagents used were of analytical grade and all solutions were prepared using deionized water (18.2 MV?cm).

PY - 2013/11/28

Y1 - 2013/11/28

N2 - Concentrations and species of iodine isotopes (127 I and 129 I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129 I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on 129 I and 127 I, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30and 50 N. The results show iodate as the predominant species in the analyzed marine waters for both 127 I and 129 I. Despite the rather constant ratios of 127 I - /127 IO 3 -, the 129 I - /129 IO 3 - values reveal variations that apparently response to sources, environmental conditions and residence time. These findings provide a new tracer approach that will strongly enhance the application of anthropogenic 129 I in ocean environments and impact on climate at the ocean boundary layer.

AB - Concentrations and species of iodine isotopes (127 I and 129 I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129 I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on 129 I and 127 I, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30and 50 N. The results show iodate as the predominant species in the analyzed marine waters for both 127 I and 129 I. Despite the rather constant ratios of 127 I - /127 IO 3 -, the 129 I - /129 IO 3 - values reveal variations that apparently response to sources, environmental conditions and residence time. These findings provide a new tracer approach that will strongly enhance the application of anthropogenic 129 I in ocean environments and impact on climate at the ocean boundary layer.

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Iodine isotopes species fingerprinting environmental conditions in surface water along the northeastern Atlantic Ocean

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