Citation:

PANGAEA.944867

Name: Seasonal high-resolution sensor data for pCO2, pCH4 and water quality in south coast of Finland, northern Baltic Sea
Published: 2022-06-01
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Baltic Sea; CH4; chlorophyll fluorescence; CO2; FDOM; organic matter cycling; Salinity; turbidity

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Published: 2022-06-01 • DOI registered: 2022-12-01

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Abstract:

Flow-through pCO2, pCH4, air pressure, fDOM, turbidity, chlorophyll a, temperature and salinity measurements in the coastal waters of SW Finland (northern Baltic Sea) and several adjacent rivers and creeks over nearly two ice-free seasons; 2020 (20.04. - 13.10.) and 2021 (19.04. - 06.08.) Surface water flow-through system aboard a rigid inflatable boat (see Scheinin & Asmala, 2020). All the measured variables are combined into a single data set, because, the same water was passed through all the sensors virtually simultaneously (within less than 3 seconds). The data for pCO2 and pCH4 include some short gaps due to automatic re-zeroing. Depth of water intake: 50 cm. Flow rate: 29.0 L/min for the whole flow-through system and reduced to 2.4 L/min for the GHG sensors. Travelling speed: 0 m/s – 12 m/s. Logging interval: 5 seconds (0 m – 60 m). Hydraulic lag: ~ 8 seconds. Geospatial referencing for all the data has been corrected for the hydraulic lag and the sensor specific response times (see Scheinin & Asmala, 2020).

Keyword(s):

Baltic Sea; CH4; chlorophyll fluorescence; CO2; FDOM; organic matter cycling; Salinity; turbidity

Supplement to:

Asmala, Eero; Scheinin, Matias (2024): Persistent hot spots of CO 2 and CH 4 in coastal nearshore environments. Limnology and Oceanography Letters, 9(2), 119-127, https://doi.org/10.1002/lol2.10370

Coverage:

Median Latitude: 59.946112 * Median Longitude: 23.252876 * South-bound Latitude: 59.800270 * West-bound Longitude: 22.772380 * North-bound Latitude: 60.136327 * East-bound Longitude: 23.826888

Date/Time Start: 2020-04-20T05:04:22 * Date/Time End: 2021-08-06T11:21:15

Minimum DEPTH, water: 0.5 m * Maximum DEPTH, water: 0.5 m

Event(s):

HM2_2020_SW_FINNISH_COAST * Latitude Start: 59.977454 * Longitude Start: 23.419002 * Latitude End: 59.833660 * Longitude End: 23.243429 * Date/Time Start: 2020-04-20T05:04:22 * Date/Time End: 2020-10-13T12:57:45 * Location: Southwestern Baltic Sea * Method/Device: Flow-through system * Comment: Sampled from a boat.

HM3_2021_SW_FINNISH_COAST * Latitude Start: 59.977454 * Longitude Start: 23.419002 * Latitude End: 59.828813 * Longitude End: 23.096762 * Date/Time Start: 2021-04-19T03:47:15 * Date/Time End: 2021-08-06T11:21:15 * Location: Southwestern Baltic Sea * Method/Device: Flow-through system * Comment: Sampled from a boat.

Comment:

#999:NA

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Asmala, Eero
2	DATE/TIME	Date/Time		Asmala, Eero		Geocode – UTC
3	LATITUDE	Latitude		Asmala, Eero	EXO Handheld (Xylem Inc., USA)	Geocode
4	LONGITUDE	Longitude		Asmala, Eero	EXO Handheld (Xylem Inc., USA)	Geocode
5	DEPTH, water	Depth water	m	Asmala, Eero		Geocode
6	Methane, partial pressure	pCH4	ppmv	Asmala, Eero	CO2-Pro CV Submersible pCO2 Sensor (Pro Oceanus Inc., Canada)
7	Carbon dioxide, partial pressure	pCO2	ppmv	Asmala, Eero	Mini CH4 Submersible pCH4 Sensor (Pro Oceanus Inc., Canada)
8	Carbon dioxide	CO2	mmol/m³	Asmala, Eero	after Weiss (1974)
9	Methane	CH4	mmol/m³	Asmala, Eero	converted using temperature, salinity and air pressure according to Wiesenburg and Guinasso, 1979
10	Pressure, atmospheric	PPPP	mm Hg	Asmala, Eero	EXO Handheld (Xylem Inc., USA)
11	Fluorescence, dissolved organic matter	fDOM	QSU	Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2
12	Turbidity (Formazin nephelometric unit)	Turbidity	FNU	Asmala, Eero	EXO2 Multisonde (YSI_EXO)
13	Chlorophyll a	Chl a	µg/l	Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2
14	Temperature, water	Temp	°C	Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2
15	Salinity	Sal		Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1229200 data points

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