Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical...
Transcript of Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical...
Ideas on Observing Eddies and Their Biogeochemical Functions
Cyclone C1 in 2004
SLA and ADCP
Hydro Section: 0-700m
C1
T/S and Oxygen Anomalies in the C1
Oxygen [umol/L]Salinity Eddy Core
Survey 1Outside Eddy
σσ σσ θθ θθ σσ σσ θθ θθ
Salinity
PO
NO
Overlay of multi-tracers at σθ of 26.2
T/S and Oxygen During 1st and 2nd Surveys
1st
2nd
Eddy transport of AOU into the North Atlantic Subtr opical GyreG
ulf-s
tream
/ w
este
rn
boun
dary
cur
rent
How does eddy impact the AOU and related New Produc tion estimation?
AOU
AOU
AOU
AOU
Li and Jenkins, in progress
Drop packages by aircraft
The“Dr. ‘Strangelove’McGillicuddyIntelligent DeploymentInto An Eddy” Technique
IntelligentEnough?
Surface Layer Circulation
Mathis et al. (2007)
SBI ProjectSummer 2002
Chukchi Shelf Break
Region of Eddy Formation
Pt. Barrow
ALASKA
0.2 SvChukchi Sea
0.8 Sv
1 Sv = 106 m3 s-1
Canada Basin
Region of Eddy Formation
76º N
72º N
70º N
68º N
66º N
74º N
180º E 150º W160º W170º W
• The eastward flowing current has been shown to be unstable and capable of generating subsurface eddies that transport water from the current offshore.
EDDY CORE PROPERTIESTemperature (°C)
-1.7
Silicate ( µmol kg -1)
45
Particulate Organic Carbon
Organic Carbon and Oxygen Utilization
Vertical Export Production
Canada Basin
Chukchi Shelf
4.2x1010 mole-C yr -1Horizontal Export
from Eddies
4.6x1010 mole-C yr -1
•Rates of vertical export production estimated from O2 utilization in the halocline should be considered too high.
zone of low DO due to remineralizarion
Eddies
• Can we catch an eddy at formation?
• We can observe them after formation, so we can observe their role in horizontal transport and contribution to export production signatures in the mesopelagic