@inbook{d9da4b4aa937491cbe122109346ba94c,
title = "Water Column CO2 measurements during the gas EX-98 expedition",
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.",
author = "Feely, {R. A.} and R. Wanninkhof and Hansell, {Dennis A} and Lamb, {M. F.} and D. Greeley and K. Lee",
year = "2001",
month = jan,
day = "1",
doi = "10.1029/GM127p0173",
language = "English (US)",
isbn = "9780875909868",
volume = "127",
series = "Geophysical Monograph Series",
publisher = "Blackwell Publishing Ltd",
pages = "173--180",
booktitle = "Gas Transfer at Water Surfaces, 2002",
}