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Processes controlling carbon dioxide...

Carrillo, Christopher John.

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Processes controlling carbon dioxide in seawater.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Processes controlling carbon dioxide in seawater./
Author:	Carrillo, Christopher John.
Description:	229 p.
Notes:	Chair: David M. Karl.
Contained By:	Dissertation Abstracts International63-03B.
Subject:	Biogeochemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3045415
ISBN:	0493593926

Processes controlling carbon dioxide in seawater.
Carrillo, Christopher John.

Processes controlling carbon dioxide in seawater. - 229 p.

Chair: David M. Karl.

Thesis (Ph.D.)--University of Hawaii, 2002.

Although the solution chemistry of carbon dioxide (CO2) in seawater has been extensively studied during the past century, many questions still persist regarding the ecological understanding of the observed variability of the measured CO2 parameters; pH, fugacity of CO2 (fCO2), dissolved inorganic carbon (DIC) and total alkalinity (TA). At equilibrium, these four measurable parameters combined with the proper apparent equilibrium constants for carbonic acid in seawater describe the speciation concentrations of dissolved aqueous CO2 (CO2*(aq)), bicarbonate (HCO3<super>−</super>) and carbonate (CO 3<super>2−</super>). The observed variability of the measured CO2 parameters within the environment must be interpreted within the proper framework of assumptions relating the solution chemistry to the physical, chemical and biological processes that alter CO2 concentrations. This requires a cross discipline understanding of the effects of biology and physics on the CO2 solution chemistry in seawater.

ISBN: 0493593926Subjects--Topical Terms:

545717
Biogeochemistry.

Processes controlling carbon dioxide in seawater.
LDR:03616nam 2200313 a 45 001 928253
005 20110426
008 110426s2002 eng d
020 $a 0493593926
035 $a (UnM)AAI3045415
035 $a AAI3045415
040 $a UnM $c UnM
100 1 $a Carrillo, Christopher John. $3 1251716
245 1 0 $a Processes controlling carbon dioxide in seawater.
300 $a 229 p.
500 $a Chair: David M. Karl.
500 $a Source: Dissertation Abstracts International, Volume: 63-03, Section: B, page: 1206.
502 $a Thesis (Ph.D.)--University of Hawaii, 2002.
520 $a Although the solution chemistry of carbon dioxide (CO2) in seawater has been extensively studied during the past century, many questions still persist regarding the ecological understanding of the observed variability of the measured CO2 parameters; pH, fugacity of CO2 (fCO2), dissolved inorganic carbon (DIC) and total alkalinity (TA). At equilibrium, these four measurable parameters combined with the proper apparent equilibrium constants for carbonic acid in seawater describe the speciation concentrations of dissolved aqueous CO2 (CO2*(aq)), bicarbonate (HCO3<super>−</super>) and carbonate (CO 3<super>2−</super>). The observed variability of the measured CO2 parameters within the environment must be interpreted within the proper framework of assumptions relating the solution chemistry to the physical, chemical and biological processes that alter CO2 concentrations. This requires a cross discipline understanding of the effects of biology and physics on the CO2 solution chemistry in seawater.
520 $a Photosynthesis alters seawater CO2 chemistry by reducing dissolved aqueous CO2 to organic matter. This results in a decrease of fCO 2 pressure and DIC concentration. Temperature alters seawater CO 2 chemistry through changes of the equilibrium constants that determine the partitioning of the inorganic carbon species; dissolved aqueous CO 2, bicarbonate and carbonate. The interaction of these two processes on timescales of seconds to years is a major theme of this dissertation. Additionally, the timescale of exchange for CO2 across an atmosphere-seawater interface can greatly influence the interpretation of observations within natural settings.
520 $a The interaction of these processes was studied in three contrasting systems to illustrate the similarities and differences, and to reveal an unexpected complexity. For instance, the observed decrease of normalized DIC (to a salinity of 35) at Station ALOHA within the North Pacific Subtropical Gyre was the result of the thermodynamic control on the solution chemistry of CO2 in seawater. In the region west of the Antarctic Peninsula, CO 2 dynamics were a function of temperature changes and dilution due to ice melt, as well as net photosynthesis. Finally, CO2 chemistry was studied in a temperature-controlled continuous culture. Many results from such studies are applied to open ocean process yet these studies may be flawed because of improper assumptions concerning gas-solution equilibrium and thermodynamic equilibrium.
590 $a School code: 0085.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Biology, Oceanography. $3 783691
650 4 $a Environmental Sciences. $3 676987
690 $a 0416
690 $a 0425
690 $a 0768
710 2 0 $a University of Hawaii. $3 1250246
773 0 $t Dissertation Abstracts International $g 63-03B.
790 $a 0085
790 1 0 $a Karl, David M., $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3045415