An in situ instrument for planar O2 optode measurements at benthic interfaces
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An in situ instrument for planar O2 optode measurements at benthic interfaces. / Glud, Ronnie N.; Tengberg, Anders; Kühl, Michael; Hall, Per O. J.; Klimant, Ingo.
In: Limnology and Oceanography, Vol. 46, No. 8, 2001, p. 2073-2080.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - An in situ instrument for planar O2 optode measurements at benthic interfaces
AU - Glud, Ronnie N.
AU - Tengberg, Anders
AU - Kühl, Michael
AU - Hall, Per O. J.
AU - Klimant, Ingo
PY - 2001
Y1 - 2001
N2 - A new in situ instrument for two-dimensional mapping of oxygen in coastal sediments is presented. The measuring principle is described, and potential mechanical disturbances, solute and particle smearing associated with the measurements, and calibration routines are evaluated. The first in situ measurements obtained in two different benthic communities are presented. In a shallow photosynthetic sediment (1 m of water depth), an extensive horizontal and temporal variation in the O2 distribution caused by benthic photosynthesis and irrigating fauna was resolved. Repetitive planar optode measurements performed along a transect in central Øresund, Denmark (17 m of water depth) revealed a positive correlation between the apparent O2 penetration depths (OP) measured with a lateral distance <5.0 mm, whereas OP measured with a larger horizontal distance (up to 50 m) were not correlated. Consequently, the OP varied in patches with a characteristic size of 5.0 mm. The instrument described is a powerful new tool for in situ characterization of spatiotemporal variations in O2 distributions within benthic communities. The instrument can be adapted for use at full ocean depths, e.g., on deep-sea landers or remote operating vehicles.
AB - A new in situ instrument for two-dimensional mapping of oxygen in coastal sediments is presented. The measuring principle is described, and potential mechanical disturbances, solute and particle smearing associated with the measurements, and calibration routines are evaluated. The first in situ measurements obtained in two different benthic communities are presented. In a shallow photosynthetic sediment (1 m of water depth), an extensive horizontal and temporal variation in the O2 distribution caused by benthic photosynthesis and irrigating fauna was resolved. Repetitive planar optode measurements performed along a transect in central Øresund, Denmark (17 m of water depth) revealed a positive correlation between the apparent O2 penetration depths (OP) measured with a lateral distance <5.0 mm, whereas OP measured with a larger horizontal distance (up to 50 m) were not correlated. Consequently, the OP varied in patches with a characteristic size of 5.0 mm. The instrument described is a powerful new tool for in situ characterization of spatiotemporal variations in O2 distributions within benthic communities. The instrument can be adapted for use at full ocean depths, e.g., on deep-sea landers or remote operating vehicles.
U2 - 10.4319/lo.2001.46.8.2073
DO - 10.4319/lo.2001.46.8.2073
M3 - Journal article
AN - SCOPUS:0035664903
VL - 46
SP - 2073
EP - 2080
JO - Limnology and Oceanography
JF - Limnology and Oceanography
SN - 0024-3590
IS - 8
ER -
ID: 201681555