Spatial and Temporal Variability of emp/emCOsub2/sub, Carbon Fluxes, and Saturation State on the West Florida Shelf

Lisa L. Robbins; Kendra L. Daly; L. Barbero; R. Wanninkhof; R. He; H. Zong; J. T. Lisle; W. J. Cai; C. G. Smith; Kendra L. Daly

doi:10.1029/2018JC014195

Spatial and Temporal Variability of emp/emCOsub2/sub, Carbon Fluxes, and Saturation State on the West Florida Shelf

Lisa L. Robbins
, Kendra L. Daly
, L. Barbero
, R. Wanninkhof
, R. He
, H. Zong
, J. T. Lisle
, W. J. Cai
, C. G. Smith
, Kendra L. Daly

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

Abstract

The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 p CO 2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO 2 at 0.32 ± 1.5 mol m −2 yr −1 . Subregions, however, reveal slightly different trends, where surface waters associated with 40–200&hyphen;m isobath in the northern and southern WFS are generally weak sinks all year, except for summer when they act as sources of CO 2 . Conversely, nearshore waters (<40 m) are a source of CO 2 , particularly the southern shallow waters, which are a source all year round. The p CO 2 of seawater has been increasing at a rate of approximately 4.37 μatm/year as compared to atmospheric p CO 2 which has increased at a rate of about 1.7 μatm per year from 1996 to 2016. The annual CO 2 flux has increased from −0.78 to 0.92 mol m −2 yr −1 on the shelf from 1996–2016. The WFS is emitting 9.23 Tg C/year, with the southern nearshore region emitting the most at 9.01 Tg C/year and the northern region acting as a sink of −1.96 Tg C/year. Aragonite saturation state on the WFS shows seasonal and geographic trends with values ranging from 2 to 5. Lowest values are found in winter associated with subregion <40&hyphen;m isobath.

Original language	American English
Journal	Journal of Geophysical Research: Oceans
Volume	123
DOIs	https://doi.org/10.1029/2018JC014195
State	Published - Sep 1 2018

Keywords

West Florida Shelf
Gulf of Mexico
pCO2
carbon flux
saturation state
carbon budget
p CO2

Disciplines

Life Sciences
Marine Biology

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@article{eb5804ef4f534358b62a4b0efa83034c,

title = "Spatial and Temporal Variability of emp/emCOsub2/sub, Carbon Fluxes, and Saturation State on the West Florida Shelf",

abstract = " The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 p CO 2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO 2 at 0.32 \± 1.5 mol m \−2 yr \−1 . Subregions, however, reveal slightly different trends, where surface waters associated with 40\–200\&hyphen;m isobath in the northern and southern WFS are generally weak sinks all year, except for summer when they act as sources of CO 2 . Conversely, nearshore waters (<40 m) are a source of CO 2 , particularly the southern shallow waters, which are a source all year round. The p CO 2 of seawater has been increasing at a rate of approximately 4.37 \μatm/year as compared to atmospheric p CO 2 which has increased at a rate of about 1.7 \μatm per year from 1996 to 2016. The annual CO 2 flux has increased from \−0.78 to 0.92 mol m \−2 yr \−1 on the shelf from 1996\–2016. The WFS is emitting 9.23 Tg C/year, with the southern nearshore region emitting the most at 9.01 Tg C/year and the northern region acting as a sink of \−1.96 Tg C/year. Aragonite saturation state on the WFS shows seasonal and geographic trends with values ranging from 2 to 5. Lowest values are found in winter associated with subregion <40\&hyphen;m isobath.",

keywords = "West Florida Shelf, Gulf of Mexico, pCO2, carbon flux, saturation state, carbon budget, p CO2",

author = "Robbins, \{Lisa L.\} and Daly, \{Kendra L.\} and L. Barbero and R. Wanninkhof and R. He and H. Zong and Lisle, \{J. T.\} and Cai, \{W. J.\} and Smith, \{C. G.\} and Daly, \{Kendra L.\}",

year = "2018",

month = sep,

day = "1",

doi = "10.1029/2018JC014195",

language = "American English",

volume = "123",

journal = "Journal of Geophysical Research: Oceans",

}

TY - JOUR

T1 - Spatial and Temporal Variability of emp/emCOsub2/sub, Carbon Fluxes, and Saturation State on the West Florida Shelf

AU - Robbins, Lisa L.

AU - Daly, Kendra L.

AU - Barbero, L.

AU - Wanninkhof, R.

AU - He, R.

AU - Zong, H.

AU - Lisle, J. T.

AU - Cai, W. J.

AU - Smith, C. G.

AU - Daly, Kendra L.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 p CO 2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO 2 at 0.32 ± 1.5 mol m −2 yr −1 . Subregions, however, reveal slightly different trends, where surface waters associated with 40–200&hyphen;m isobath in the northern and southern WFS are generally weak sinks all year, except for summer when they act as sources of CO 2 . Conversely, nearshore waters (<40 m) are a source of CO 2 , particularly the southern shallow waters, which are a source all year round. The p CO 2 of seawater has been increasing at a rate of approximately 4.37 μatm/year as compared to atmospheric p CO 2 which has increased at a rate of about 1.7 μatm per year from 1996 to 2016. The annual CO 2 flux has increased from −0.78 to 0.92 mol m −2 yr −1 on the shelf from 1996–2016. The WFS is emitting 9.23 Tg C/year, with the southern nearshore region emitting the most at 9.01 Tg C/year and the northern region acting as a sink of −1.96 Tg C/year. Aragonite saturation state on the WFS shows seasonal and geographic trends with values ranging from 2 to 5. Lowest values are found in winter associated with subregion <40&hyphen;m isobath.

AB - The West Florida Shelf (WFS) is a source of uncertainty for the Gulf of Mexico carbon budget. Data from the synthesis of approximately 135,000 p CO 2 values from 97 cruises from the WFS show that the shelf waters fluctuate between being a weak source to a weak sink of carbon. Overall, the shelf acts as a weak source of CO 2 at 0.32 ± 1.5 mol m −2 yr −1 . Subregions, however, reveal slightly different trends, where surface waters associated with 40–200&hyphen;m isobath in the northern and southern WFS are generally weak sinks all year, except for summer when they act as sources of CO 2 . Conversely, nearshore waters (<40 m) are a source of CO 2 , particularly the southern shallow waters, which are a source all year round. The p CO 2 of seawater has been increasing at a rate of approximately 4.37 μatm/year as compared to atmospheric p CO 2 which has increased at a rate of about 1.7 μatm per year from 1996 to 2016. The annual CO 2 flux has increased from −0.78 to 0.92 mol m −2 yr −1 on the shelf from 1996–2016. The WFS is emitting 9.23 Tg C/year, with the southern nearshore region emitting the most at 9.01 Tg C/year and the northern region acting as a sink of −1.96 Tg C/year. Aragonite saturation state on the WFS shows seasonal and geographic trends with values ranging from 2 to 5. Lowest values are found in winter associated with subregion <40&hyphen;m isobath.

KW - West Florida Shelf

KW - Gulf of Mexico

KW - pCO2

KW - carbon flux

KW - saturation state

KW - carbon budget

KW - p CO2

UR - https://digitalcommons.usf.edu/msc_facpub/884

UR - https://digitalcommons.usf.edu/cimage_pubs/54

U2 - 10.1029/2018JC014195

DO - 10.1029/2018JC014195

M3 - Article

VL - 123

JO - Journal of Geophysical Research: Oceans

JF - Journal of Geophysical Research: Oceans

ER -

Spatial and Temporal Variability of emp/emCOsub2/sub, Carbon Fluxes, and Saturation State on the West Florida Shelf

Abstract

Keywords

Disciplines

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