Auxiliary Material for Paper 2010JC006856


Evaluating triple oxygen isotope estimates of gross primary production at the Hawaii Ocean Time-series and Bermuda Atlantic Time-series Study sites
   
David P. Nicholson and Rachel H. R. Stanley
Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA

Eugeni Barkan 
Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel

David M. Karl 
Department of Oceanography, University of Hawai'i at Manoa, Honolulu, Hawaii, USA

Boaz Luz 
Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel

Paul D. Quay 
School of Oceanography, University of Washington, Seattle, Washington, USA

Scott C. Doney 
Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA


Nicholson, D. P., R. H. R. Stanley, E. Barkan, D. M. Karl, B. Luz, P. D. Quay and S. C. Doney (2012), Evaluating triple oxygen isotope estimates of gross primary production at the Hawaii Ocean Time-series and Bermuda Atlantic Time-series Study sites, J. Geophys. Res., 117, C05012, doi:10.1029/2010JC006856.

Introduction

Auxiliary material for this article contains a description and associated figures showing model performance in simulating dissolved oxygen saturation at the Bermuda Atlantic Time-series Study and Hawaii Ocean Time-series locations. Also included is a data table of measurements at BATS and HOT.  



1. 2010jc006856-txts01.pdf
Text S1. Description of model oxygen simulation and comparison to time series observations as well as a sensitivity test of the dependence of 17Delta triple oxygen isotope anomaly on the assumed parameterization for net community production (NCP).



2. 2010jc006856-fs01.eps

Figure S1. Simulated dissolved oxygen saturation anomaly in the upper 150 meters at BATS and HOT. Circles show observations from time-series measurements. NCP is set to the default value of 2.5 mol O2 m-2 y-1.



3. 2010jc006856-fs02.eps 

Figure S2. Simulated dissolved oxygen saturation anomaly (%) in the mixed layer at BATS and HOT (blue lines) for base case, and upper and lower limits of NCP = 0 and 5 mol O2 m-2 y-1. Red circles show observations from BATS and HOT time-series measurements.


4. 2010jc006856-fs03.eps 
Figure S3. The delta18 for the default case run in the upper 150 meters. Values are near equilibrium in the mixed layer, more positive where respiration dominates, and negative where photosynthetic O2 accumulates.


5. 2010jc006856-fs04.eps 

Figure S4. Sensitivity of calculated 17Delta to changes in the magnitude of NCP. Annual NCP was set to 2.5 mol O2 m-2 y-1 at each site in the default case. The effect on mixed layer 17Delta of doubling NCP to 5 mol O2 m-2 y-1 (red) or reducing NCP to zero (blue) is shown for BATS and HOT below. On average, doubling NCP increased 17-Delta by 1.7 per meg and 1.4 per meg for BATS and HOT, respectively. Setting NCP to zero decreased 17Delta by 2.5 per meg and 1.7 per meg. Therefore, error introduced due to uncertainty in NCP is less than analytical uncertainty in measuring 17Delta as well as much less than caused by uncertainties in gas transfer rates.



6. 2010jc006856-ts01.txt

Table S1. Auxiliary data table of relevant measurements at BATS and HOT. Data included in this table was used in the creation of Figures 5-10.