Water Column CO2 measurements during the gas EX-98 expedition

R. A. Feely, R. Wanninkhof, Dennis A Hansell, M. F. Lamb, D. Greeley, K. Lee

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Citations (Scopus)

Abstract

During the recent GasEx-98 cruise in the North Atlantic aboard the NOAA ship Ronald H. Brown, carbon measurements were performed in the area of 46°N, 20.5°W. This process study followed a warm core ring tagged with the deliberately introduced tracer, SF6. Continuous surface water measurements were combined with vertical profiles sampled daily to depths up to 1000 m for carbon mass balance studies. Dissolved inorganic carbon (DIC) and fCO2 measurements were conducted onboard in both underway and discrete analysis modes. During the 25-day experiment in the tagged patch surface water fCO2 values averaged 275 ± 9 µatm, providing a constant condition of undersaturation and flux of CO2 into the ocean. Using the Wanninkhof [1992] exchange coefficient, the estimated CO2 flux ranged from approximately 1-27 mol m~2 yr_1. The largest CO2 flux occurred during a large wind event beginning on June 6. After the event, DIC and fCO2 values decreased for a few days, as a result of increased productivity associated with the strong mixing event. The DIC results were combined with the TOC, TON, and nutrient data to provide a mass balance for carbon within the patch. The results for the 25-day period indicate DIC increases in the mixed layer ranging from 0.2-1.8 µmol kg-1 d-1 due to gas exchange.

Original languageEnglish (US)
Title of host publicationGas Transfer at Water Surfaces, 2002
PublisherBlackwell Publishing Ltd
Pages173-180
Number of pages8
Volume127
ISBN (Electronic)9781118668634
ISBN (Print)9780875909868
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

Publication series

NameGeophysical Monograph Series
Volume127
ISSN (Print)0065-8448
ISSN (Electronic)2328-8779

Fingerprint

expeditions
dissolved inorganic carbon
water column
carbon
gases
gas
water
mass balance
surface water
gas exchange
vertical profile
mixed layer
tracer
productivity
nutrients
ships
nutrient
ocean
tracers
oceans

ASJC Scopus subject areas

  • Geophysics

Cite this

Feely, R. A., Wanninkhof, R., Hansell, D. A., Lamb, M. F., Greeley, D., & Lee, K. (2001). Water Column CO2 measurements during the gas EX-98 expedition. In Gas Transfer at Water Surfaces, 2002 (Vol. 127, pp. 173-180). (Geophysical Monograph Series; Vol. 127). Blackwell Publishing Ltd. https://doi.org/10.1029/GM127p0173

Water Column CO2 measurements during the gas EX-98 expedition. / Feely, R. A.; Wanninkhof, R.; Hansell, Dennis A; Lamb, M. F.; Greeley, D.; Lee, K.

Gas Transfer at Water Surfaces, 2002. Vol. 127 Blackwell Publishing Ltd, 2001. p. 173-180 (Geophysical Monograph Series; Vol. 127).

Research output: Chapter in Book/Report/Conference proceedingChapter

Feely, RA, Wanninkhof, R, Hansell, DA, Lamb, MF, Greeley, D & Lee, K 2001, Water Column CO2 measurements during the gas EX-98 expedition. in Gas Transfer at Water Surfaces, 2002. vol. 127, Geophysical Monograph Series, vol. 127, Blackwell Publishing Ltd, pp. 173-180. https://doi.org/10.1029/GM127p0173
Feely RA, Wanninkhof R, Hansell DA, Lamb MF, Greeley D, Lee K. Water Column CO2 measurements during the gas EX-98 expedition. In Gas Transfer at Water Surfaces, 2002. Vol. 127. Blackwell Publishing Ltd. 2001. p. 173-180. (Geophysical Monograph Series). https://doi.org/10.1029/GM127p0173
Feely, R. A. ; Wanninkhof, R. ; Hansell, Dennis A ; Lamb, M. F. ; Greeley, D. ; Lee, K. / Water Column CO2 measurements during the gas EX-98 expedition. Gas Transfer at Water Surfaces, 2002. Vol. 127 Blackwell Publishing Ltd, 2001. pp. 173-180 (Geophysical Monograph Series).
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