Southern Ocean iron enrichment experiment: carbon cycling in high- and low-Si waters.
The availability of iron is known to exert a controlling influence on biological productivity in surface waters over large areas of the ocean and may have been an important factor in the variation of the concentration of atmospheric carbon dioxide over glacial cycles. The effect of iron in the Southern Ocean is particularly important because of its large area and abundant nitrate, yet iron-enhanced growth of phytoplankton may be differentially expressed between waters with high silicic acid in the south and low silicic acid in the north, where diatom growth may be limited by both silicic acid and iron. Two mesoscale experiments, designed to investigate the effects of iron enrichment in regions with high and low concentrations of silicic acid, were performed in the Southern Ocean. These experiments demonstrate iron's pivotal role in controlling carbon uptake and regulating atmospheric partial pressure of carbon dioxide.
Coale
Kenneth H
KH
Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, CA 95039-9647, USA. coale@mlml.calstate.edu
Johnson
Kenneth S
KS
Chavez
Francisco P
FP
Buesseler
Ken O
KO
Barber
Richard T
RT
Brzezinski
Mark A
MA
Cochlan
William P
WP
Millero
Frank J
FJ
Falkowski
Paul G
PG
Bauer
James E
JE
Wanninkhof
Rik H
RH
Kudela
Raphael M
RM
Altabet
Mark A
MA
Hales
Burke E
BE
Takahashi
Taro
T
Landry
Michael R
MR
Bidigare
Robert R
RR
Wang
Xiujun
X
Chase
Zanna
Z
Strutton
Pete G
PG
Friederich
Gernot E
GE
Gorbunov
Maxim Y
MY
Lance
Veronica P
VP
Hilting
Anna K
AK
Hiscock
Michael R
MR
Demarest
Mark
M
Hiscock
William T
WT
Sullivan
Kevin F
KF
Tanner
Sara J
SJ
Gordon
R Mike
RM
Hunter
Craig N
CN
Elrod
Virginia A
VA
Fitzwater
Steve E
SE
Jones
Janice L
JL
Tozzi
Sasha
S
Koblizek
Michal
M
Roberts
Alice E
AE
Herndon
Julian
J
Brewster
Jodi
J
Ladizinsky
Nicolas
N
Smith
Geoffrey
G
Cooper
David
D
Timothy
David
D
Brown
Susan L
SL
Selph
Karen E
KE
Sheridan
Cecelia C
CC
Twining
Benjamin S
BS
Johnson
Zackary I
ZI
D001272:Atmosphere; D018533:Biomass; D002244:Carbon / Q000032:analysis / Q000378:metabolism*; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D017377:Diatoms / Q000254:growth & development / Q000378:metabolism; D017753:Ecosystem; D007501:Iron / Q000032:analysis / Q000378:metabolism; D009566:Nitrates / Q000032:analysis / Q000378:metabolism; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism; D009792:Oceans and Seas; D010788:Photosynthesis; D010839:Phytoplankton / Q000254:growth & development* / Q000378:metabolism; D012623:Seawater / Q000737:chemistry; D012824:Silicic Acid / Q000032:analysis / Q000378:metabolism
D009566:Nitrates; D012824:Silicic Acid; D002734:Chlorophyll; D002245:Carbon Dioxide; D002244:Carbon; D007501:Iron; D009584:Nitrogen; D000077194:Chlorophyll A