STATION M Service Activities

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SA Number: 3.1 Name of the SA: STATION M NORWEGIAN SEA PH AND PCO2 TIME SERIES FOR OCEAN ACIDIFICATION ESTIMATES Institute: Geophysical Institute, University of Bergen, Norway Description:

Ocean acidification describes the ongoing decrease in the pH of the Earth’s oceans, caused by the uptake of carbon dioxide (CO2) from the atmosphere. The acidification will influence the ecosystem, but to what degree and in which form is not yet fully known. Therefore it is vital to monitor the annual and seasonal changes in the inorganic carbon system and by this keep track of the acidification process.

Since 2011, pCO2 in surface water and atmosphere have been measured at Station M in the Norwegian Sea, and real time raw data are available at www.imr.no/forskning/forskningsdata/stasjonm/view.html. The suite of measurements was extended with surface pH in 2012 and sub-surface pCO2 and pH in 2013. From these measurements we have estimated the saturation state of calcite and aragonite (Ca and Ar) at the site over seasons and years, and thus the temporal variation of ocean acidification is being monitored and described.

The history of Station M goes back to 1948, when the monitoring of oceanographic and meteorological data started. The hydrographic data from the deep water is among the longest time series in the world, and from these data we have learnt that e.g. the deep Norwegian Sea has become warmer since the mid 80ties.

Outputs:

Figure 1: pH (upper) and saturation state of aragonite (lower) in Norwegian Sea surface water. Data are from Station M.

Figure 1: pH (upper) and saturation state of aragonite (lower) in Norwegian Sea surface water. Data are from Station M.

Figure 2: pCO2 in Norwegian Sea surface water. Data are from Station M.

Figure 2: pCO2 in Norwegian Sea surface water. Data are from Station M.

Figure 3: pCO2 (upper) and pH (lower) in Norwegian Sea mixed layer (150 to 200 m depth). Data are from Station M.

Figure 3: pCO2 (upper) and pH (lower) in Norwegian Sea mixed layer (150 to 200 m depth). Data are from Station M.

Figure 4: Saturation state of aragonite in Norwegian Sea mixed layer (150 to 200 m depth). Data are from Station M.

Figure 4: Saturation state of aragonite in Norwegian Sea mixed layer (150 to 200 m depth). Data are from Station M.

Polarbuoy.jpg. Please enter the text: “The surface buoy at Station M in the Norwegian Sea”

Polarbuoy.jpg. Please enter the text: “The surface buoy at Station M in the Norwegian Sea”

Download outputs 

NameSize
NameSize
StationM OmegaCa&Ar Surface126.8 KiB
StationM OmegaCa&Ar 150m142.6 KiB
Polarbuoy5.1 MiB
StationM FCO2&pH Surface125.2 KiB