HR: 0800h
AN: OS31A-0556 [Abstracts]
TI: CLIVAR/CO2 Repeat Hydrography Program: Carbon Measurements along 30øN in the North Pacific during
June-August 2004
AU: * Lamb, M
EM: Marilyn.F.Roberts@noaa.gov
AF: NOAA Pacific Marine Environmental Laboratory, 7600 Sandpoint Way NE, Seattle, WA 98115
United States
AU: Greeley, D J
EM: Dana.J.Greeley@noaa.gov
AF: NOAA Pacific Marine Environmental Laboratory, 7600 Sandpoint Way NE, Seattle, WA 98115
United States
AU: Feely, R A
EM: Richard.A.Feely@noaa.gov
AF: NOAA Pacific Marine Environmental Laboratory, 7600 Sandpoint Way NE, Seattle, WA 98115
United States
AU: Sabine, C L
EM: Chris.Sabine@noaa.gov
AF: NOAA Pacific Marine Environmental Laboratory, 7600 Sandpoint Way NE, Seattle, WA 98115
United States
AU: Wanninkhof, R
EM: Rik.Wanninkhof@noaa.gov
AF: NOAA Atlantic Oceanographic and Meteorological Laboratory, 4301 Rickenbacker Causeway, Miami, FL 33149
United States
AU: Peltola, E
EM: Esa.Peltola@noaa.gov
AF: NOAA Atlantic Oceanographic and Meteorological Laboratory, 4301 Rickenbacker Causeway, Miami, FL 33149
United States
AB:
Distributions of dissolved inorganic carbon (DIC) were determined throughout the water column at 190 stations during the
CLIVAR/CO$_2$ Repeat Hydrography Program 30$^\circ$N P2 Cruise between June and August of 2004 onboard the R/V {\it
Melville}. The DIC measurements were made with an overall accuracy and precision of approximately 1.5 $\mu$moles kg$^{-1}$.
We compared our cruise results with the previous WOCE cruise data collected along the same cruise track in 1994 using a
number of different fitting routines. Based on our results, we recommend that a 4 $\mu$mol kg$^{-1}$ downward adjustment be
made to the 1994 P2 DIC data. The 2004 DIC
results show evidence for deep mixing in the western subtropical gyre, particularly within the region of Kuroshio Extension.
The combined effect of the tilted density surfaces and the deeper ventilation leads to lower DIC concentrations at
intermediate depths between 200 and 700~m west of 180$^\circ$. DIC values east of 180$^\circ$ in the upper 1000~m shoal due
to upwelling processes. As we continue to process the physical and biogeochemical results from these and future cruises, we
will be able to determine the large-scale changes in the carbon content of the Pacific Ocean.
UR: http://www.pmel.noaa.gov/co2/co2-home.html
DE: 4805 Biogeochemical cycles (1615)
DE: 4806 Carbon cycling
DE: 4808 Chemical tracers
DE: 4820 Gases
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting