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Gindorf, Sonja; Booge, Dennis; Kock, Annette; Bange, Hermann Werner; Marandino, Christa A (2020): Surface and water column methane (CH4) distribution and sea-to-air flux during ALKOR cruise AL516 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.924372

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Abstract:
We developed a purge-and-trap system to measure CH_4 with high accuracy in the surface water and the water column of the Kiel Bight, close to the monthly time series station Boknis Eck. The small-scale variability of CH_4 was investigated from samples taken in the Baltic Sea during the two Alkor cruises AL510 and AL516 in the in early summer and autumn 2018 when two gas exchange experiments (GasEx) were carried out around the Boknis Eck time series station. This station has been sampled for CH_4 on a monthly basis since 2007.During the GasEx cruises, special emphasis was put on the sampling of the upper water column and the mixed layer, with high-resolution sampling to determine potential gas gradients within the mixed layer that are not captured with conventional sampling approaches. Water column CH_4 samples were collected from Niskin bottles mounted to a CTD-water-rosette-sampler, Dinghy samples were collected using an aquarium pump, Underway samples were taken from the ship's sea water supply. All samples were filled bubble-free into dark brown 20 mL glass vials by overflowing the approximate threefold volume and crimp-sealed with rubber stoppers and aluminium caps.
Keyword(s):
Baltic Sea; CH4; gas exchange; Methane
Related to:
Gindorf, Sonja (2020): Development of a Purge + Trap System for the Quantification of Methane Variability in the Baltic Sea. Master Thesis. Kiel University, Faculty of Agricultural and Nutritional Sciences, Faculty of Mathematics and Natural Sciences. GEOMAR - Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemistry Unit Chemical Oceanography
Coverage:
Median Latitude: 54.551326 * Median Longitude: 10.082642 * South-bound Latitude: 54.488085 * West-bound Longitude: 10.018897 * North-bound Latitude: 54.726140 * East-bound Longitude: 10.255232
Date/Time Start: 2018-09-13T00:00:00 * Date/Time End: 2018-09-22T00:00:00
Minimum DEPTH, water: 0.1 m * Maximum DEPTH, water: 26.1 m
Event(s):
AL516_22-1  * Latitude: 54.581000 * Longitude: 10.104000 * Date/Time: 2018-09-13T10:17:29 * Elevation: -26.0 m * Location: Baltic Sea * Campaign: AL516 * Basis: Alkor (1990) * Method/Device: CTD/Rosette (CTD-RO)
AL516_23-1  * Latitude: 54.581000 * Longitude: 10.104000 * Date/Time: 2018-09-13T14:57:01 * Elevation: -26.2 m * Location: Baltic Sea * Campaign: AL516 * Basis: Alkor (1990) * Method/Device: CTD/Rosette (CTD-RO) * Comment: geschleppt , Gas Injektion
AL516_25-1  * Latitude: 54.545000 * Longitude: 10.055000 * Date/Time: 2018-09-14T10:04:51 * Elevation: -22.0 m * Location: Baltic Sea * Campaign: AL516 * Basis: Alkor (1990) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEventBooge, Dennis
Station labelStationBooge, Dennis
Bottle numberBottleBooge, Dennis
Sample code/labelSample labelBooge, Dennis
DATE/TIMEDate/TimeBooge, DennisGeocode
LATITUDELatitudeBooge, DennisGeocode
LONGITUDELongitudeBooge, DennisGeocode
DEPTH, waterDepth watermBooge, DennisGeocode
Pressure, waterPressdbarBooge, DennisCTD
10 Temperature, waterTemp°CBooge, DennisCTD
11 SalinitySalBooge, DennisCTD
12 OxygenO2µmol/lBooge, DennisCTD
13 MethaneCH4nmol/lGindorf, SonjaPurge and trap gas chromatographyTriplicate 1
14 MethaneCH4nmol/lGindorf, SonjaPurge and trap gas chromatographyTriplicate 2
15 MethaneCH4nmol/lGindorf, SonjaPurge and trap gas chromatographyTriplicate 3
16 MethaneCH4nmol/lGindorf, Sonjamean
17 ErrorErrorGindorf, Sonjamethane, STD DEV [nmol L-1]
18 ErrorErrorGindorf, Sonjamethane, STD DEV [%]
Size:
2051 data points

Data

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


Event

Station

Bottle

Sample label

Date/Time

Latitude

Longitude

Depth water [m]

Press [dbar]
(CTD)
10 
Temp [°C]
(CTD)
11 
Sal
(CTD)
12 
O2 [µmol/l]
(CTD)
13 
CH4 [nmol/l]
(Triplicate 1, Purge and trap ...)
14 
CH4 [nmol/l]
(Triplicate 2, Purge and trap ...)
15 
CH4 [nmol/l]
(Triplicate 3, Purge and trap ...)
16 
CH4 [nmol/l]
(mean)
17 
Error
(methane, STD DEV [nmol L-1])
18 
Error
(methane, STD DEV [%])
AL516_22-1 22112018-09-1354.5805816510.1047875024.324.312.869423.2681207.76102.91102.93102.89102.910.0210.020
AL516_22-122222018-09-1354.5806609010.1049221018.418.414.628122.6744243.41
AL516_22-122332018-09-1354.5806912210.1049611714.414.417.387519.1486243.88
AL516_22-122442018-09-1354.5806910310.1049613314.414.417.390719.1334249.0449.3749.5647.7748.900.9371.916
AL516_22-122552018-09-1354.5807744010.1049740011.311.317.434218.3481248.63
AL516_22-122662018-09-1354.5807771010.1049743311.311.317.433818.3471254.56
AL516_22-122772018-09-1354.5808494010.104953008.28.217.418118.2240254.76
AL516_22-122882018-09-1354.5808501310.104952258.28.217.416218.2156257.44
AL516_22-122992018-09-1354.5809232510.104837505.25.217.374318.0750257.61
AL516_22-12210102018-09-1354.5809257510.104833175.25.217.370918.059010.98
AL516_22-12211112018-09-1354.5809650010.104673131.81.817.362017.986362.10
AL516_22-12212122018-09-1354.5809660010.104667401.81.817.362217.9863200.447.677.647.687.660.0200.257
AL516_23-1 231132018-09-1454.5408203010.0654550023.823.813.055423.1965201.50103.9798.2891.6697.976.4496.582
AL516_23-1232142018-09-1454.5408095010.0654563318.818.815.424522.2721237.9825.0026.2625.5625.610.6592.575
AL516_23-1233152018-09-1454.5407829310.0654296714.714.717.307119.3621238.69
AL516_23-1234162018-09-1454.5407829510.0654292514.714.717.315819.3445248.8125.0026.2625.5625.610.6592.575
AL516_23-1235172018-09-1454.5407706210.0654430010.710.717.452618.4415248.70
AL516_23-1236182018-09-1454.5407691810.0654430010.710.717.451818.4446253.95
AL516_23-1237192018-09-1454.5406661210.065488587.77.717.400718.2173253.98
AL516_23-1238202018-09-1454.5406626810.065491427.77.717.402518.2207254.47
AL516_23-1239212018-09-1454.5405740010.065577604.74.717.333018.1142254.54
AL516_23-12310222018-09-1454.5405733310.065579234.74.717.324718.110041.48
AL516_23-12311232018-09-1454.5405259010.065651651.71.717.302818.102141.47
AL516_23-12312242018-09-1454.5405240010.065654001.71.717.302718.102241.708.368.429.558.780.6207.060
AL516_25-1 251252018-09-1454.5190943010.0845616013.213.217.266119.5117257.69
AL516_25-1252262018-09-1454.5189917210.0847443211.411.417.384018.5825259.48
AL516_25-1253272018-09-1454.5189729010.084826509.39.317.434018.1285259.32
AL516_25-1254282018-09-1454.5189722510.084826259.39.317.436018.1268260.07
AL516_25-1255292018-09-1454.5189252310.084798537.37.317.433818.1101259.73
AL516_25-1256302018-09-1454.5189238710.084797277.37.317.434218.1124261.26
AL516_25-1257312018-09-1454.5188876010.084772955.35.317.419018.0438260.20
AL516_25-1258322018-09-1454.5188860010.084772505.35.317.418118.0380260.84
AL516_25-1259332018-09-1454.5188627510.084752053.83.817.412118.0083260.80
AL516_25-12510342018-09-1454.5188622510.084750953.83.817.412818.0117107.79
AL516_25-12511352018-09-1454.5188473310.084735671.81.817.400017.9660111.47
AL516_25-12512362018-09-1454.5188469510.084735701.81.817.400417.9658114.67
AL516_27-1 271372018-09-1554.5267643310.0921891720.220.215.496022.2381219.0839.5438.8138.2238.850.6911.779
AL516_27-1272382018-09-1554.5266571210.0922850815.215.216.525920.6824254.56
AL516_27-1273392018-09-1554.5265452010.0924640010.310.317.020419.6418254.23
AL516_27-1274402018-09-1554.5265442710.0924660010.310.317.019519.6422240.9727.9528.1128.1128.060.0840.301
AL516_27-1275412018-09-1554.5264837310.092566928.08.017.165118.0393245.17
AL516_27-1276422018-09-1554.5264829210.092568088.08.017.162918.0343243.24
AL516_27-1277432018-09-1554.5264689010.092570506.36.317.106916.6725245.12
AL516_27-1278442018-09-1554.5264658710.092569676.36.317.111116.6742244.25
AL516_27-1279452018-09-1554.5263846710.092549174.24.217.096516.7643245.21
AL516_27-12710462018-09-1554.5263836710.092549674.24.217.098716.772122.37
AL516_27-12711472018-09-1554.5263667010.092558001.71.717.101116.872023.39
AL516_27-12712482018-09-1554.5263666310.092558001.71.717.101516.874623.158.518.538.498.510.0180.211
AL516_29-1 291492018-09-1554.5241374010.0662118023.723.712.596323.3751152.91
AL516_29-1292502018-09-1554.5239272510.0662905018.318.313.739123.0122251.91
AL516_29-1293512018-09-1554.5238281510.0663049013.313.316.384620.9334252.38
AL516_29-1294522018-09-1554.5238270310.0663062013.313.316.384020.9271256.71
AL516_29-1295532018-09-1554.5236895010.066387929.29.217.111918.2690257.17
AL516_29-1296542018-09-1554.5236880010.066390509.29.217.112118.2712257.52
AL516_29-1297552018-09-1554.5235849210.066556156.16.117.092918.1675257.24
AL516_29-1298562018-09-1554.5235820810.066560456.16.117.091018.1705256.42
AL516_29-1299572018-09-1554.5235773310.066712004.04.017.101118.1501257.25
AL516_29-12910582018-09-1554.5235777010.066712004.14.117.103018.14891.05
AL516_29-12911592018-09-1554.5236162710.066732801.61.617.096218.16441.08
AL516_29-12912602018-09-1554.5236181310.066734401.61.617.096618.16380.987.767.707.507.650.1331.739
AL516_32-1 321612018-09-1654.5494753310.0556236017.517.516.036921.6445197.8549.5649.4549.1449.380.2210.448
AL516_32-1322622018-09-1654.5493550010.0555661714.814.816.654120.4302233.81
AL516_32-1323632018-09-1654.5493066710.0555857011.711.717.346519.0598234.64
AL516_32-1324642018-09-1654.5493043310.0555848011.711.717.362019.0294251.0724.2524.2724.3424.280.0470.194
AL516_32-1325652018-09-1654.5492496010.055557608.78.717.243918.5984252.04
AL516_32-1326662018-09-1654.5492491510.055558078.78.717.245818.5999251.85
AL516_32-1327672018-09-1654.5492205010.055562505.75.716.899318.2103251.90
AL516_32-1328682018-09-1654.5492200010.055561335.75.716.897418.2074252.98
AL516_32-1329692018-09-1654.5492094010.055525203.83.816.894818.2205252.92
AL516_32-13210702018-09-1654.5492092010.055524103.83.816.895518.219414.66
AL516_32-13211712018-09-1654.5492143710.055496701.81.816.853918.174313.96
AL516_32-13212722018-09-1654.5492148010.055495801.81.816.853618.174810.688.757.798.438.320.5026.030
AL516_34-1 341732018-09-1654.4996552010.0900062018.818.814.924322.5364218.13
AL516_34-1342742018-09-1654.4995988010.0900163316.216.216.021421.5918263.24
AL516_34-1343752018-09-1654.4996051710.0900758311.111.116.930118.8624263.46
AL516_34-1344762018-09-1654.4996051310.0900766711.111.116.930618.8536263.20
AL516_34-1345772018-09-1654.4996668810.089996658.88.817.015817.9680264.19
AL516_34-1346782018-09-1654.4996685210.089991558.88.817.016117.9663265.90
AL516_34-1347792018-09-1654.4996995810.089837706.86.817.027517.9377265.64
AL516_34-1348802018-09-1654.4996993310.089832606.86.817.026617.9361265.85
AL516_34-1349812018-09-1654.4996879010.089783053.73.717.038717.9204265.85
AL516_34-13410822018-09-1654.4996874310.089782953.73.717.038717.920593.04
AL516_34-13411832018-09-1654.4996830010.089839601.81.817.035817.9260168.24
AL516_34-13412842018-09-1654.4996830010.089843871.81.817.049617.9218181.66
AL516_36-1 361852018-09-1754.5007027710.0705542021.121.115.244322.2704181.2686.0486.1485.9586.050.1000.116
AL516_36-1362862018-09-1754.5009030010.0703063016.616.616.359120.9398253.17
AL516_36-1363872018-09-1754.5010317510.0700502312.512.516.657920.2748251.75
AL516_36-1364882018-09-1754.5010332810.0700460312.512.516.651520.2883259.1043.1743.0243.2543.150.1230.286
AL516_36-1365892018-09-1754.5009893010.0697616010.610.617.101618.6185259.28
AL516_36-1366902018-09-1754.5009875010.0697593310.610.617.087218.6979259.60
AL516_36-1367912018-09-1754.5009041710.069637507.57.516.881918.0215259.94
AL516_36-1368922018-09-1754.5009022310.069634107.57.516.881118.0210259.15
AL516_36-1369932018-09-1754.5008675010.069549174.44.416.876118.0210259.16
AL516_36-13610942018-09-1754.5008670010.069547334.54.516.876118.021233.54
AL516_36-13611952018-09-1754.5008699310.069498681.51.516.878318.020033.57
AL516_36-13612962018-09-1754.5008702010.069496451.51.516.878318.020033.5011.929.6310.771.50313.948
AL516_38-1 381972018-09-1754.4986196810.0289443524.224.212.597823.3001192.03
AL516_38-1382982018-09-1754.4986344010.0287628019.119.115.055022.3491247.42
AL516_38-1383992018-09-1754.4986537310.0287664713.113.116.599820.6548245.72
AL516_38-13841002018-09-1754.4986534710.0287659313.113.116.598720.6594253.98
AL516_38-13851012018-09-1754.4986605310.028692007.97.917.069718.6214254.63
AL516_38-13861022018-09-1754.4986608010.028689507.97.917.077018.6512265.88
AL516_38-13871032018-09-1754.4986653010.028622905.85.817.048518.4008264.28
AL516_38-13881042018-09-1754.4986647010.028623105.85.817.046818.4015267.50
AL516_38-13891052018-09-1754.4986449010.028609303.83.817.070218.0099266.89
AL516_38-138101062018-09-1754.4986446010.028608203.83.817.075018.00190.86
AL516_38-138111072018-09-1754.4986375010.028550081.61.617.143217.974576.21
AL516_38-138121082018-09-1754.4986385010.028547921.61.617.141717.9741123.90
AL516_40-1 4011092018-09-1854.5302766710.0630464725.925.912.657823.3622123.7984.1581.4782.0782.571.4071.704
AL516_40-14021102018-09-1854.5301755310.0632499319.219.215.327222.0910220.62
AL516_40-14031112018-09-1854.5300840010.0634120013.013.016.667320.6698220.86
AL516_40-14041122018-09-1854.5300820010.0634150013.013.016.669920.6677253.0344.6645.1445.2945.030.3260.723
AL516_40-14051132018-09-1854.5299662710.0635640710.010.017.019818.7671253.57
AL516_40-14061142018-09-1854.5299655310.0635651310.010.017.019218.7674263.21
AL516_40-14071152018-09-1854.5299070010.063641206.86.816.997918.2230263.54
AL516_40-14081162018-09-1854.5299056710.063642386.86.816.997518.2233263.09
AL516_40-14091172018-09-1854.5298478010.063706003.83.816.933518.0081262.88
AL516_40-140101182018-09-1854.5298482010.063706673.83.816.934018.00830.85
AL516_40-140111192018-09-1854.5298176710.063766531.51.516.939718.01110.81
AL516_40-140121202018-09-1854.5298150010.063770001.51.516.941018.01160.8010.4910.4410.8010.570.1901.795
AL516_42-1 4211212018-09-1854.5292680010.0781962723.023.012.719623.3116170.75
AL516_42-14221222018-09-1854.5292892010.0782608017.417.415.917022.0724228.36
AL516_42-14231232018-09-1854.5293003010.0783882712.512.516.919020.1080227.96
AL516_42-14241242018-09-1854.5292999510.0783892312.512.516.904520.1578267.11
AL516_42-14251252018-09-1854.5292830710.0784594210.310.317.068018.8325267.02
AL516_42-14261262018-09-1854.5292818310.0784598810.310.317.068918.8339264.91
AL516_42-14271272018-09-1854.5291838310.078452587.17.117.204618.0600264.82
AL516_42-14281282018-09-1854.5291815010.078452557.17.117.202418.0613265.14
AL516_42-14291292018-09-1854.5291323310.078441874.04.017.370518.0521265.23
AL516_42-142101302018-09-1854.5291320010.078441554.04.017.371218.052240.28
AL516_42-142111312018-09-1854.5291149010.078419051.51.517.372818.051593.16
AL516_42-142121322018-09-1854.5291146010.078418531.51.517.372618.0515150.54
AL516_44-1 4411332018-09-1954.5257173310.0823522021.421.414.324622.7735150.0557.9558.1158.1158.050.0830.144
AL516_44-14421342018-09-1954.5256166010.0825794317.517.516.145921.7495192.84
AL516_44-14431352018-09-1954.5255783310.0826837313.413.416.567520.9301196.53
AL516_44-14441362018-09-1954.5255780010.0826858013.413.416.574820.9176262.1843.6043.1742.7343.170.4541.053
AL516_44-14451372018-09-1954.5255010010.0827385010.310.317.017219.4467262.32
AL516_44-14461382018-09-1954.5255000010.0827400010.310.317.045419.1520262.10
AL516_44-14471392018-09-1954.5254728010.082727077.27.217.153718.0601262.24
AL516_44-14481402018-09-1954.5254727510.082727087.27.217.153018.0778262.33
AL516_44-14491412018-09-1954.5254662710.082728004.24.217.151418.0487262.52
AL516_44-144101422018-09-1954.5254653310.082728004.24.217.151218.0488195.47
AL516_44-144111432018-09-1954.5254270010.082725001.51.517.151618.0495195.82
AL516_44-144121442018-09-1954.5254260010.082724801.51.517.151618.0495195.598.138.008.078.070.0680.845
AL516_46-1 4611452018-09-1954.5521392010.1003892026.126.112.571023.381191.11
AL516_46-14621462018-09-1954.5521730010.1003930021.121.113.411323.1481251.91
AL516_46-14631472018-09-1954.5521813310.1002320015.215.216.266121.8964253.66
AL516_46-14641482018-09-1954.5521825010.1002275015.215.216.276121.8857260.53
AL516_46-14651492018-09-1954.5522223310.1000506710.110.117.098918.3646260.43
AL516_46-14661502018-09-1954.5522218010.1000482010.110.117.104818.3498264.21
AL516_46-14671512018-09-1954.5521930010.099881007.07.017.202718.1878264.35
AL516_46-14681522018-09-1954.5521930010.099879007.07.017.202718.1872264.92
AL516_46-14691532018-09-1954.5521907010.099803633.83.817.257018.1212265.02
AL516_46-146101542018-09-1954.5521906510.099802523.93.917.257518.12070.89
AL516_46-146111552018-09-1954.5522318010.099778471.61.617.269418.109269.64
AL516_46-146121562018-09-1954.5522337010.099778031.61.617.268918.1094141.03
AL516_48-1 4811572018-09-2054.5487684810.1124354221.321.313.035123.2394149.0376.7881.9377.9578.892.6943.414
AL516_48-14821582018-09-2054.5486850010.1125656016.716.715.369622.1083245.25
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