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Webb, Alison L; Malin, Gill; Hopkins, Frances E; Hughes, Claire; Von Glasow, Roland; Liss, Peter S (2016): Dimethylsulphide and halocarbon concentrations taken from 10m integrated samples during the 2012 KOSMOS Finland Mesocosm experiment [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.863649, Supplement to: Webb, Alison L; Leedham-Elvidge, Emma; Hughes, Claire; Hopkins, Frances E; Malin, Gill; Bach, Lennart Thomas; Schulz, Kai Georg; Crawfurd, Katharine J; Brussaard, Corina P D; Stuhr, Annegret; Riebesell, Ulf; Liss, Peter S (2016): Effect of ocean acidification and elevated fCO2 on trace gas production by a Baltic Sea summer phytoplankton community. Biogeosciences, 13(15), 4595-4613, https://doi.org/10.5194/bg-13-4595-2016

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Abstract:
The Baltic Sea is a unique environment as the largest body of brackish water in the world. Acidification of the surface oceans due to absorption of anthropogenic CO2 emissions is an additional stressor facing the pelagic community of the already challenging Baltic Sea. To investigate its impact on trace gas biogeochemistry, a large-scale mesocosm experiment was performed off Tvärminne Research Station, Finland in summer 2012. During the second half of the experiment, dimethylsulphide (DMS) concentrations in the highest fCO2 mesocosms (1075-1333 µatm) were 34 % lower than at ambient CO2 (350 µatm). However the net production (as measured by concentration change) of seven halocarbons analysed was not significantly affected by even the highest CO2 levels after 5 weeks exposure. Methyl iodide (CH3I) and diiodomethane (CH2I2) showed 15 % and 57 % increases in mean mesocosm concentration (3.8 ± 0.6 pmol L-1 increasing to 4.3 ± 0.4 pmol L-1 and 87.4 ± 14.9 pmol L-1 increasing to 134.4 ± 24.1 pmol L-1 respectively) during Phase II of the experiment, which were unrelated to CO2 and corresponded to 30 % lower Chl-? concentrations compared to Phase I. No other iodocarbons increased or showed a peak, with mean chloroiodomethane (CH2ClI) concentrations measured at 5.3 (± 0.9) pmol L-1 and iodoethane (C2H5I) at 0.5 (± 0.1) pmol L-1. Of the concentrations of bromoform (CHBr3; mean 88.1 ± 13.2 pmol L-1), dibromomethane (CH2Br2; mean 5.3 ± 0.8 pmol L-1) and dibromochloromethane (CHBr2Cl, mean 3.0 ± 0.5 pmol L-1), only CH2Br2 showed a decrease of 17 % between Phases I and II, with CHBr3 and CHBr2Cl showing similar mean concentrations in both Phases. Outside the mesocosms, an upwelling event was responsible for bringing colder, high CO2, low pH water to the surface starting on day t16 of the experiment; this variable CO2 system with frequent upwelling events implies the community of the Baltic Sea is acclimated to regular significant declines in pH caused by up to 800 µatm fCO2. After this upwelling, DMS concentrations declined, but halocarbon concentrations remained similar or increased compared to measurements prior to the change in conditions. Based on our findings, with future acidification of Baltic Sea waters, biogenic halocarbon emissions are likely to remain at similar values to today, however emissions of biogenic sulphur could significantly decrease from this region.
Related to:
Paul, Allanah Joy; Schulz, Kai Georg; Achterberg, Eric Pieter; Hellemann, Dana; Nausch, Monika; Boxhammer, Tim; Bach, Lennart Thomas; Trense, Yves (2016): KOSMOS Finland 2012 mesocosm study: carbonate chemistry, particulate and dissolved matter pools, and phytoplankton community composition using marker pigments (CHEMTAX) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.863032
Schulz, Kai Georg (2016): KOSMOS Finland 2012 mesocosm study: environmental parameter [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.863116
Coverage:
Latitude: 59.858330 * Longitude: 23.258330
Date/Time Start: 2012-06-19T00:00:00 * Date/Time End: 2012-07-23T00:00:00
Event(s):
KOSMOS_2012_Tvaerminne * Latitude: 59.858330 * Longitude: 23.258330 * Date/Time: 2012-06-12T00:00:00 * Method/Device: Mesocosm experiment (MESO)
Size:
1911 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Date/Time

DOE [day]

Meso label

Treat

DMS diss [nmol/l]

CH3I [pmol/l]

CH2I2 [pmol/l]

C2H5I [pmol/l]

CHBr3 [pmol/l]
10 
CH2Br2 [pmol/l]
11 
CHBr2Cl [pmol/l]
12 
CH2ClI [pmol/l]
2012-06-19-3M1280 ppm3.047128.09147.507.2473.7174.943
2012-06-21-1M1280 ppm3.4836.357124.92126.897.3334.7048.031
2012-06-220M1280 ppm3.4504.91484.650.75795.686.1522.4016.652
2012-06-231M1280 ppm3.0844.11187.170.36697.775.7705.068
2012-06-242M1280 ppm3.0624.629109.750.74494.766.0883.4325.609
2012-06-253M1280 ppm3.0503.558107.490.56588.325.9644.5515.130
2012-06-264M1280 ppm2.9793.36565.640.44882.866.5872.3055.599
2012-06-275M1280 ppm3.0253.81482.9896.366.0242.7504.320
2012-06-286M1280 ppm
2012-06-297M1280 ppm3.2464.94295.720.664100.355.9812.6367.129
2012-07-019M1280 ppm2.9673.93772.300.55382.014.8702.4835.519
2012-07-0311M1280 ppm2.8783.86593.200.53491.555.3262.5755.024
2012-07-0513M1280 ppm3.4654.835117.860.485113.405.6822.8826.397
2012-07-0816M1280 ppm3.4973.992134.280.46194.384.6152.5534.845
2012-07-0917M1280 ppm3.9073.854130.330.38693.794.7003.3784.741
2012-07-1119M1280 ppm4.7084.634151.590.37794.804.8683.9765.429
2012-07-1220M1280 ppm5.4964.222144.870.491102.915.1673.6547.087
2012-07-1321M1280 ppm6.5424.639178.460.519109.965.2863.5857.119
2012-07-1422M1280 ppm5.5344.109154.410.49189.044.8963.0795.808
2012-07-1523M1280 ppm5.0083.609112.680.40588.304.5631.8126.613
2012-07-1624M1280 ppm4.9833.400162.300.36087.364.2592.1594.691
2012-07-1725M1280 ppm4.8324.387142.900.44795.294.4613.2826.298
2012-07-1826M1280 ppm4.6413.89596.090.40190.514.3872.2006.945
2012-07-1927M1280 ppm4.6523.943115.240.44394.304.5942.6686.840
2012-07-2028M1280 ppm4.5973.952101.610.439113.674.6944.0385.539
2012-07-2129M1280 ppm4.5674.185132.200.434103.572.9886.209
2012-07-2331M1280 ppm4.4924.125150.160.454100.752.7947.260
2012-06-19-3M31120 ppm
2012-06-21-1M31120 ppm3.4214.296113.20105.357.6943.5296.150
2012-06-220M31120 ppm3.2473.84996.300.68088.936.0372.9865.711
2012-06-231M31120 ppm3.3733.58993.450.23082.666.0353.1934.818
2012-06-242M31120 ppm3.1853.62097.670.57287.556.2273.6154.910
2012-06-253M31120 ppm3.2433.71595.010.60980.525.9602.9994.517
2012-06-264M31120 ppm3.0053.30792.930.50481.145.9213.8004.390
2012-06-275M31120 ppm2.9993.35191.9484.345.6433.1094.292
2012-06-286M31120 ppm
2012-06-297M31120 ppm3.1463.62676.960.58170.245.3871.8154.595
2012-07-019M31120 ppm3.1814.08172.980.52479.595.4413.3104.827
2012-07-0311M31120 ppm3.0734.04192.040.49889.045.3683.2485.404
2012-07-0513M31120 ppm2.8223.99596.750.40589.664.6382.6645.009
2012-07-0816M31120 ppm3.104140.440.41692.374.4593.0214.637
2012-07-0917M31120 ppm3.1344.287124.670.39284.724.3603.3484.362
2012-07-1119M31120 ppm3.2004.116137.310.42580.064.9122.6105.604
2012-07-1220M31120 ppm3.5763.971145.020.48789.065.0473.5905.941
2012-07-1321M31120 ppm3.8614.707162.120.43592.504.6703.0575.723
2012-07-1422M31120 ppm3.8634.297166.080.41691.914.6363.5756.013
2012-07-1523M31120 ppm3.3803.803151.590.41389.194.3754.1765.753
2012-07-1624M31120 ppm3.3543.873162.570.44388.654.1651.6834.931
2012-07-1725M31120 ppm3.3933.871151.760.44387.894.2222.6205.391
2012-07-1826M31120 ppm3.4783.889119.690.44983.954.7443.8865.692
2012-07-1927M31120 ppm3.4803.996135.460.38284.574.3521.8974.892
2012-07-2028M31120 ppm3.4834.040130.090.47396.404.5272.7275.080
2012-07-2129M31120 ppm3.4204.002111.730.44379.812.4164.559
2012-07-2331M31120 ppm3.3873.621122.750.40978.082.8394.949
2012-06-19-3M5280 ppm2.9674.373109.92140.306.5603.0794.410
2012-06-21-1M5280 ppm3.2944.22888.50114.147.3643.7036.466
2012-06-220M5280 ppm3.2703.80867.600.73590.686.3214.2966.780
2012-06-231M5280 ppm3.1053.21193.850.40676.975.7342.8343.937
2012-06-242M5280 ppm2.9313.27790.170.45977.415.7802.7694.526
2012-06-253M5280 ppm3.2343.69795.030.57679.566.1683.2784.396
2012-06-264M5280 ppm2.9863.50869.000.67477.795.8533.3735.240
2012-06-275M5280 ppm3.2223.39886.5384.596.1892.9155.607
2012-06-286M5280 ppm
2012-06-297M5280 ppm3.0883.50590.680.50274.365.3232.3044.116
2012-07-019M5280 ppm3.2204.01884.650.58082.415.7043.6154.603
2012-07-0311M5280 ppm2.9693.92590.250.51580.945.1673.8884.713
2012-07-0513M5280 ppm3.1844.18785.510.44387.384.8923.3155.122
2012-07-0816M5280 ppm3.5454.154128.060.47684.414.6743.0344.334
2012-07-0917M5280 ppm3.9824.690108.940.53187.874.9683.0355.919
2012-07-1119M5280 ppm4.6104.161162.310.47183.214.8233.6945.455
2012-07-1220M5280 ppm5.4134.125154.510.43182.474.6593.3345.962
2012-07-1321M5280 ppm6.7924.762202.180.48599.775.2733.4136.120
2012-07-1422M5280 ppm6.0034.852168.920.40388.024.4542.7445.661
2012-07-1523M5280 ppm5.6494.432122.950.60688.104.8583.5177.258
2012-07-1624M5280 ppm5.5984.185167.910.45887.504.8493.5786.005
2012-07-1725M5280 ppm5.4474.308117.340.46294.254.9533.1727.384
2012-07-1826M5280 ppm5.1984.110120.480.46485.714.7742.6916.752
2012-07-1927M5280 ppm5.4474.713157.040.43193.485.0163.3925.821
2012-07-2028M5280 ppm5.0414.219111.280.44876.444.0282.9764.709
2012-07-2129M5280 ppm
2012-07-2331M5280 ppm4.4713.710122.620.42684.172.3514.975
2012-06-19-3M6840 ppm2.7943.97596.66136.256.5073.0804.210
2012-06-21-1M6840 ppm3.1193.94166.60104.577.2123.5436.327
2012-06-220M6840 ppm2.9603.38963.660.72882.085.7922.9235.691
2012-06-231M6840 ppm3.1553.27495.650.63579.566.0213.2444.642
2012-06-242M6840 ppm3.0503.13595.170.68979.635.6203.3284.303
2012-06-253M6840 ppm3.1533.53692.850.52980.796.1743.0894.312
2012-06-264M6840 ppm2.7783.02073.330.53873.335.5502.6603.925
2012-06-275M6840 ppm2.7812.91470.0174.285.2612.6153.946
2012-06-286M6840 ppm
2012-06-297M6840 ppm2.9153.05365.890.46675.385.0652.8194.138
2012-07-019M6840 ppm3.1383.55584.840.51985.585.1092.8643.934
2012-07-0311M6840 ppm2.8753.95461.680.50482.775.3173.1755.498
2012-07-0513M6840 ppm3.1834.24386.830.45486.505.0663.5194.484
2012-07-0816M6840 ppm3.2044.847110.600.48787.524.8852.9654.994
2012-07-0917M6840 ppm
2012-07-1119M6840 ppm3.7474.599130.940.43888.395.2243.5465.777
2012-07-1220M6840 ppm4.2094.182116.830.43383.554.9573.0215.435
2012-07-1321M6840 ppm4.6124.314131.730.46588.754.6713.5465.362
2012-07-1422M6840 ppm4.3914.264136.290.38990.514.3993.6215.163
2012-07-1523M6840 ppm4.2264.195106.190.44787.584.7203.0746.142
2012-07-1624M6840 ppm4.1043.791129.950.43882.464.5932.5214.866
2012-07-1725M6840 ppm3.9904.035127.070.46593.054.3033.1604.583
2012-07-1826M6840 ppm4.0443.850108.030.42585.944.8253.3795.479
2012-07-1927M6840 ppm3.8113.872106.550.39982.154.4623.5844.478
2012-07-2028M6840 ppm3.7963.77399.720.42477.584.2842.5774.583
2012-07-2129M6840 ppm4.0423.871100.430.41489.983.0305.174
2012-07-2331M6840 ppm3.4913.61198.150.42473.712.1635.210
2012-06-19-3M7340 ppm2.6593.82587.00132.016.1113.3784.447
2012-06-21-1M7340 ppm2.8263.48866.7874.816.5012.2094.860
2012-06-220M7340 ppm3.3823.70087.490.67293.986.6563.5215.408
2012-06-231M7340 ppm
2012-06-242M7340 ppm3.0403.60288.350.72776.786.3953.0594.380
2012-06-253M7340 ppm3.0523.36186.760.51878.675.7162.6464.311
2012-06-264M7340 ppm2.8213.08471.430.58771.575.5492.4174.003
2012-06-275M7340 ppm2.7873.11375.2071.925.6011.7424.495
2012-06-286M7340 ppm
2012-06-297M7340 ppm2.9703.19668.700.60571.995.3682.3714.535
2012-07-019M7340 ppm2.9493.75057.250.64679.195.4702.8965.643
2012-07-0311M7340 ppm2.8164.08368.490.55783.445.1772.9265.009
2012-07-0513M7340 ppm2.9164.01991.840.45982.974.9752.7955.144
2012-07-0816M7340 ppm3.2934.417124.930.44185.094.5872.4174.188
2012-07-0917M7340 ppm3.9014.807119.720.48683.815.1003.4845.539
2012-07-1119M7340 ppm4.5704.317153.690.48685.705.1203.6766.267
2012-07-1220M7340 ppm5.1884.483137.740.49479.404.6892.9515.927
2012-07-1321M7340 ppm6.3264.856186.420.48390.094.8983.0836.085
2012-07-1422M7340 ppm5.9684.625192.090.47593.664.8872.9986.578
2012-07-1523M7340 ppm5.5945.049133.060.56488.774.9583.2707.348
2012-07-1624M7340 ppm5.3294.283166.430.53183.604.8483.3385.651
2012-07-1725M7340 ppm5.0514.954147.070.59283.494.5982.3876.071
2012-07-1826M7340 ppm4.9384.362105.440.53085.605.1372.5517.525
2012-07-1927M7340 ppm4.9554.284120.070.47285.754.8652.7746.067
2012-07-2028M7340 ppm4.7114.369133.900.49785.204.7553.3616.252
2012-07-2129M7340 ppm5.0584.509123.720.54291.983.2615.540
2012-07-2331M7340 ppm4.1043.823113.740.42079.102.5825.056
2012-06-19-3M81400 ppm2.6804.22698.60135.626.1543.2263.814
2012-06-21-1M81400 ppm2.9514.36191.7874.956.6083.1075.440
2012-06-220M81400 ppm
2012-06-231M81400 ppm3.4114.092114.270.55187.106.3572.8084.685
2012-06-242M81400 ppm3.1693.92589.240.63579.136.4993.3624.550
2012-06-253M81400 ppm3.0383.37594.030.67072.916.1333.5344.640
2012-06-264M81400 ppm2.6943.17687.410.64368.885.6142.6053.965
2012-06-275M81400 ppm3.0213.83984.0581.655.9162.9183.988
2012-06-286M81400 ppm
2012-06-297M81400 ppm2.9613.91882.710.66571.285.4002.3573.831
2012-07-019M81400 ppm3.0223.84474.930.61875.994.8943.3144.698
2012-07-0311M81400 ppm2.8753.95979.720.56077.294.9693.1834.680
2012-07-0513M81400 ppm3.0854.48090.520.60485.755.5193.3325.123
2012-07-0816M81400 ppm2.8825.864120.940.59783.154.8943.2864.543
2012-07-0917M81400 ppm2.9284.98589.220.50482.434.7012.9725.482
2012-07-1119M81400 ppm2.7804.789137.650.48380.505.2352.6275.407
2012-07-1220M81400 ppm2.8154.407122.800.48479.164.7402.8634.873
2012-07-1321M81400 ppm3.1594.739152.000.52090.644.6613.0626.092
2012-07-1422M81400 ppm3.3865.862182.480.452104.804.7602.7977.286
2012-07-1523M81400 ppm3.4304.826160.450.59991.424.8473.2825.195
2012-07-1624M81400 ppm3.2874.215153.470.52479.794.4992.7645.070
2012-07-1725M81400 ppm3.3664.262148.220.43982.024.5823.0655.853
2012-07-1826M81400 ppm3.2434.208109.460.48779.394.6542.8765.898
2012-07-1927M81400 ppm3.0414.09899.350.41678.184.3852.8646.330
2012-07-2028M81400 ppm3.2884.327135.860.47987.074.6415.484
2012-07-2129M81400 ppm3.4614.443124.290.48783.002.9045.179
2012-07-2331M81400 ppm3.1604.158112.350.41178.082.6824.927
2012-06-19-3Baltic3.5105.753185.69181.007.7183.7238.163
2012-06-21-1Baltic3.2055.15282.3493.317.5953.6428.538
2012-06-220Baltic3.0724.53786.240.770119.027.0574.4738.649
2012-06-231Baltic
2012-06-242Baltic2.4004.30468.340.554139.077.1384.4137.044
2012-06-253Baltic2.6644.596111.430.698135.947.1373.2868.400
2012-06-264Baltic2.5404.73166.890.704155.198.6634.08110.086
2012-06-275Baltic2.6734.39678.23140.877.5504.1017.791
2012-06-286Baltic
2012-06-297Baltic4.1955.314116.850.779115.228.1743.75011.153
2012-07-019Baltic4.2015.72071.420.608138.667.2023.99511.482
2012-07-0311Baltic5.1066.216163.550.701134.427.4394.34011.398
2012-07-0513Baltic4.6687.12876.820.739152.347.7764.39611.518
2012-07-0816Baltic11.1798.187123.290.806191.609.1165.0149.681
2012-07-0917Baltic10.5196.618207.760.739149.398.2254.28613.016
2012-07-1119Baltic7.6716.438373.920.740151.638.7314.50713.952
2012-07-1220Baltic6.7326.239263.270.820161.758.7315.00017.044
2012-07-1321Baltic5.7615.760224.130.809154.248.5064.16218.072
2012-07-1422Baltic4.7996.803291.090.759155.039.0884.37414.728
2012-07-1523Baltic3.3195.658110.460.699179.589.0794.95414.563
2012-07-1624Baltic4.2725.430108.140.748156.368.4224.41215.061
2012-07-1725Baltic3.5356.437167.070.764145.158.7964.50213.979
2012-07-1826Baltic2.8156.337176.000.786123.198.4003.96512.583
2012-07-1927Baltic2.6137.209165.390.725112.608.3214.25811.625
2012-07-2028Baltic2.4678.336172.160.903127.349.9675.00412.034
2012-07-2129Baltic2.4748.650179.271.040134.164.96212.494
2012-07-2331Baltic1.8508.226202.510.960106.665.0118.704