Effects of simulated natural and massive resuspension on benthic oxygen, nutrient and dissolved inorganic carbon fluxes in Loch Creran, Scotland

Almroth‐Rosell, Elin; Tengberg, Anders; Andersson, Sara; Apler, Anna; Hall, Per

doi:10.1016/j.seares.2012.04.012

Cited by 27 publications

(30 citation statements)

References 24 publications

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“…Other field applications pCO 2 optodes were used on one of the autonomous Goteborg benthic landers during several expeditions to study mineralization processes, by doing sediment-water incubations, in situ at the sea floor. Examples of recent work with these instruments are given in Almroth et al (2009), Almroth-Rosell (2012), and Viktorsson et al (2012Viktorsson et al ( , 2013. In most of this fieldwork, four sensors were used in parallel.…”

Section: Atamanchuk Et Almentioning

confidence: 99%

Performance of a lifetime‐based optode for measuring partial pressure of carbon dioxide in natural waters

Atamanchuk

Tengberg

Thomas

et al. 2014

Limnology & Ocean Methods

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This article reports the performance of an improved, newly developed, compact, low power, lifetime-based optical sensor (optode) for measuring partial pressure of dissolved CO 2 gas (pCO 2 ) in natural waters. The results suggest that after preconditioning, these sensors are stable in water for time periods longer than 7 months. The wide dynamic range of about 0-50000 μatm opens possibilities for numerous applications of which some are presented. In normal marine environments with pCO 2 levels of 200-1000 μatm, the best-obtained precision was about ±2 μatm, and the absolute accuracy was between 2-75 μatm, depending on the deployment and the quality of the collected reference water samples. One limitation is that these sensors will become irreversibly poisoned by H 2 S and should thus not be deployed in sulphidic environments.

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Section: Atamanchuk Et Almentioning

confidence: 99%

Performance of a lifetime‐based optode for measuring partial pressure of carbon dioxide in natural waters

Atamanchuk

Tengberg

Thomas

et al. 2014

Limnology & Ocean Methods

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“…Drazen et al (2005) presented a novel technique with an Optode to measure respiration rates of deep sea fish, and Sommer et al (2008) described an automatic system to regulate oxygen levels and measure sedimentwater fluxes during in situ sediment incubation at vent sites. Additionally, Pakhomova et al (2007), Almroth et al (2009), and Almroth-Rosell et al (2012) used the same type of Optodes with autonomous landers to perform sediment-water incubation studies.…”

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confidence: 99%

Precise continuous measurements of pelagic respiration in coastal waters with Oxygen Optodes

Wikner

Panigrahi

Nydahl

et al. 2013

Limnology & Ocean Methods

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An analytical setup for respiration rate measurements was developed and evaluated in pelagic water samples using a commercially available optical oxygen sensor (Optode™). This setup required the development of a gas tight stopper to connect the sensors to a 1 dm 3 glass sample bottle, precise temperature control (± 0.05°C), and proper stirring of samples. The detection limit and precision of the method was 0.3 mmol O 2 m -3 d -1 . This was similar to the detection limit for the high-precision Winkler titration method reported in field studies. When compared with the Winkler method, the Optode sensor enabled operator-independent, high temporal resolution measurement of respiration, better coverage of plankton groups and detection of non-linear oxygen decline, without the need for wet chemistry. Respiration rates measured by the Optodes showed good accuracy when compared with measurements made with the Winkler titration method (3% deviation), followed the expected temperature response (Q 10 = 3.0), were correlated with chlorophyll a and were congruent with earlier reported values in the literature. The main source of uncertainty was a necessary correction for system drift during the incubation period, due to oxygen release from the plastic components. Additionally, less stringent temperature control on board research vessels during rough seas reduced the precision. We conclude that the developed Optode system can be used to measure respiration in productive coastal waters. Samples from cold or deep waters were, however, often below the detection limit.

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“…At these stations, the average wave orbital motion at the seafloor exceeded 20 cm s À 1 , the threshold for sediment erosion and resuspension. The latter was shown to cause substantial increases in respiration rates (Almroth et al, 2009;Almroth-Rosell et al, 2012). Mortenson (2013) suggests that under calm conditions, oxygen concentrations along the transect could also be influenced by tidal water exchange (using Fourier analysis), but we could not detect relationships between tide and any of the other parameters measured at the stations.…”

Section: Tablementioning

confidence: 59%

Water column oxygen dynamics within the coastal gradient in the northeastern Gulf of Mexico inner shelf

Santema

Clarke

Speer

et al. 2015

Continental Shelf Research

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Effects of simulated natural and massive resuspension on benthic oxygen, nutrient and dissolved inorganic carbon fluxes in Loch Creran, Scotland

Cited by 27 publications

References 24 publications

Performance of a lifetime‐based optode for measuring partial pressure of carbon dioxide in natural waters

Performance of a lifetime‐based optode for measuring partial pressure of carbon dioxide in natural waters

Precise continuous measurements of pelagic respiration in coastal waters with Oxygen Optodes

Water column oxygen dynamics within the coastal gradient in the northeastern Gulf of Mexico inner shelf

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