Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical...

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Ideas on Observing Eddies and Their Biogeochemical Functions

Transcript of Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical...

Page 1: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Ideas on Observing Eddies and Their Biogeochemical Functions

Page 2: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Cyclone C1 in 2004

SLA and ADCP

Hydro Section: 0-700m

C1

Page 3: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

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

Page 4: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Salinity

PO

NO

Overlay of multi-tracers at σθ of 26.2

Page 5: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

T/S and Oxygen During 1st and 2nd Surveys

1st

2nd

Page 6: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

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

Page 7: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Drop packages by aircraft

The“Dr. ‘Strangelove’McGillicuddyIntelligent DeploymentInto An Eddy” Technique

IntelligentEnough?

Page 8: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Surface Layer Circulation

Mathis et al. (2007)

Page 9: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies
Page 10: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

SBI ProjectSummer 2002

Chukchi Shelf Break

Page 11: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

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.

Page 12: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

EDDY CORE PROPERTIESTemperature (°C)

-1.7

Silicate ( µmol kg -1)

45

Page 13: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

Particulate Organic Carbon

Page 14: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

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

Page 15: Ideas on Observing Eddies and Their Biogeochemical Functions€¦ · Their Biogeochemical Functions. Cyclone C1 in 2004 SLA and ADCP Hydro Section: 0-700m C1. T/S and Oxygen Anomalies

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