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Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula

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Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula. / Hughes, Claire; Chuck, Adele L.; Rossetti, Helen; Mann, Paul J.; Turner, Suzanne M.; Clarke, Andrew; Chance, Rosie; Liss, Peter S.

In: Global Biogeochemical Cycles, Vol. 23, No. 2, GB2024, 06.2009, p. 1-13.

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Harvard

Hughes, C, Chuck, AL, Rossetti, H, Mann, PJ, Turner, SM, Clarke, A, Chance, R & Liss, PS 2009, 'Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula', Global Biogeochemical Cycles, vol. 23, no. 2, GB2024, pp. 1-13. https://doi.org/10.1029/2008GB003268

APA

Hughes, C., Chuck, A. L., Rossetti, H., Mann, P. J., Turner, S. M., Clarke, A., Chance, R., & Liss, P. S. (2009). Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula. Global Biogeochemical Cycles, 23(2), 1-13. [GB2024]. https://doi.org/10.1029/2008GB003268

Vancouver

Hughes C, Chuck AL, Rossetti H, Mann PJ, Turner SM, Clarke A et al. Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula. Global Biogeochemical Cycles. 2009 Jun;23(2):1-13. GB2024. https://doi.org/10.1029/2008GB003268

Author

Hughes, Claire ; Chuck, Adele L. ; Rossetti, Helen ; Mann, Paul J. ; Turner, Suzanne M. ; Clarke, Andrew ; Chance, Rosie ; Liss, Peter S. / Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula. In: Global Biogeochemical Cycles. 2009 ; Vol. 23, No. 2. pp. 1-13.

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@article{a6cbb22f6fba4079944dac79be1b742b,
title = "Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula",
abstract = "Sea-to-air emissions of bromocarbon gases are known to play an important role in atmospheric ozone depletion. In this study, seawater concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) were measured regularly between February 2005 and March 2007 at the Rothera Oceanographic and Biological Time Series (RaTS) site located in Marguerite Bay on the Antarctic Peninsula. Strong seasonality in CHBr3 and CH2Br2 concentrations was observed. The highest bromocarbon concentrations (up to 276.4 ± 13.0 pmol CHBr3 L1 and 30.0 ± 0.4 pmol CH2Br2 L1) were found to coincide with the annual microalgal bloom during the austral summer, with lower concentrations (up to 39.5 pmol CHBr3 L1 and 9.6 ± 0.6 pmol CH2Br2 L1) measured under the winter fast ice. The timing of the initial increase in bromocarbon concentrations was related to the sea-ice retreat and onset of the microalgal bloom. Observed seasonal variability in CH2Br2/CHBr3 suggests that this relationship may be of use in resolving bromocarbon source regions. Mainly positive saturation anomalies calculated for both the 2005/2006 and 2006/2007 summers suggest that the bay was a source of CHBr3 and CH2Br2 to the atmosphere. Estimates of bromocarbon sea-to-air flux rates from Marguerite Bay during ice-free periods are 84 (13 to 275) CHBr3 nmol m2 d1 and 21 (2 to 70) nmol CH2Br2 m2 d1. If these flux rates are representative of the seasonal ice edge zone bloom which occurs each year over large areas of the Southern Ocean during the austral summer, sea-to-air bromocarbon emissions could have an important impact on the chemistry of the Antarctic atmosphere.",
author = "Claire Hughes and Chuck, {Adele L.} and Helen Rossetti and Mann, {Paul J.} and Turner, {Suzanne M.} and Andrew Clarke and Rosie Chance and Liss, {Peter S.}",
year = "2009",
month = jun,
doi = "10.1029/2008GB003268",
language = "English",
volume = "23",
pages = "1--13",
journal = "Global Biogeochemical Cycles",
issn = "0886-6236",
publisher = "American Geophysical Union",
number = "2",

}

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TY - JOUR

T1 - Seasonal cycle of seawater bromoform and dibromomethane concentrations in a coastal bay on the western Antarctic Peninsula

AU - Hughes, Claire

AU - Chuck, Adele L.

AU - Rossetti, Helen

AU - Mann, Paul J.

AU - Turner, Suzanne M.

AU - Clarke, Andrew

AU - Chance, Rosie

AU - Liss, Peter S.

PY - 2009/6

Y1 - 2009/6

N2 - Sea-to-air emissions of bromocarbon gases are known to play an important role in atmospheric ozone depletion. In this study, seawater concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) were measured regularly between February 2005 and March 2007 at the Rothera Oceanographic and Biological Time Series (RaTS) site located in Marguerite Bay on the Antarctic Peninsula. Strong seasonality in CHBr3 and CH2Br2 concentrations was observed. The highest bromocarbon concentrations (up to 276.4 ± 13.0 pmol CHBr3 L1 and 30.0 ± 0.4 pmol CH2Br2 L1) were found to coincide with the annual microalgal bloom during the austral summer, with lower concentrations (up to 39.5 pmol CHBr3 L1 and 9.6 ± 0.6 pmol CH2Br2 L1) measured under the winter fast ice. The timing of the initial increase in bromocarbon concentrations was related to the sea-ice retreat and onset of the microalgal bloom. Observed seasonal variability in CH2Br2/CHBr3 suggests that this relationship may be of use in resolving bromocarbon source regions. Mainly positive saturation anomalies calculated for both the 2005/2006 and 2006/2007 summers suggest that the bay was a source of CHBr3 and CH2Br2 to the atmosphere. Estimates of bromocarbon sea-to-air flux rates from Marguerite Bay during ice-free periods are 84 (13 to 275) CHBr3 nmol m2 d1 and 21 (2 to 70) nmol CH2Br2 m2 d1. If these flux rates are representative of the seasonal ice edge zone bloom which occurs each year over large areas of the Southern Ocean during the austral summer, sea-to-air bromocarbon emissions could have an important impact on the chemistry of the Antarctic atmosphere.

AB - Sea-to-air emissions of bromocarbon gases are known to play an important role in atmospheric ozone depletion. In this study, seawater concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) were measured regularly between February 2005 and March 2007 at the Rothera Oceanographic and Biological Time Series (RaTS) site located in Marguerite Bay on the Antarctic Peninsula. Strong seasonality in CHBr3 and CH2Br2 concentrations was observed. The highest bromocarbon concentrations (up to 276.4 ± 13.0 pmol CHBr3 L1 and 30.0 ± 0.4 pmol CH2Br2 L1) were found to coincide with the annual microalgal bloom during the austral summer, with lower concentrations (up to 39.5 pmol CHBr3 L1 and 9.6 ± 0.6 pmol CH2Br2 L1) measured under the winter fast ice. The timing of the initial increase in bromocarbon concentrations was related to the sea-ice retreat and onset of the microalgal bloom. Observed seasonal variability in CH2Br2/CHBr3 suggests that this relationship may be of use in resolving bromocarbon source regions. Mainly positive saturation anomalies calculated for both the 2005/2006 and 2006/2007 summers suggest that the bay was a source of CHBr3 and CH2Br2 to the atmosphere. Estimates of bromocarbon sea-to-air flux rates from Marguerite Bay during ice-free periods are 84 (13 to 275) CHBr3 nmol m2 d1 and 21 (2 to 70) nmol CH2Br2 m2 d1. If these flux rates are representative of the seasonal ice edge zone bloom which occurs each year over large areas of the Southern Ocean during the austral summer, sea-to-air bromocarbon emissions could have an important impact on the chemistry of the Antarctic atmosphere.

UR - http://www.scopus.com/inward/record.url?scp=70349554600&partnerID=8YFLogxK

U2 - 10.1029/2008GB003268

DO - 10.1029/2008GB003268

M3 - Article

VL - 23

SP - 1

EP - 13

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

SN - 0886-6236

IS - 2

M1 - GB2024

ER -