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Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE626-2 from Bremerhaven, Germany to Bremerhaven, Germany

Water clarity and color were observed during the RV HEINCKE cruise HE626-2 (27.10.2023 - 01.11.2023, Wilhelmshaven, Germany - Wilhelmshaven, Germany) using a white Secchi disc with a diameter of 40 cm and a Forel-Ule color scale. The Secchi depth (SD) was recorded as a relative measure of water clarity at each in situ station during day time. At half SD the apparent color of the water above the submerged Secchi disc was determined using the Forel-Ule color scale. A Forel-Ule color scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as recemmend in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).

Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE626 from Bremerhaven, Germany to Bremerhaven, Germany

Water clarity and color were observed during the RV HEINCKE cruise HE626 (20.07.2023 - 09.08.2023, Wilhelmshaven, Germany - Wilhelmshaven, Germany) using a white Secchi disc with a diameter of 40 cm and a Forel-Ule color scale. The Secchi depth (SD) was recorded as a relative measure of water clarity at each in situ station during day time. At half SD the apparent color of the water above the submerged Secchi disc was determined using the Forel-Ule color scale. A Forel-Ule color scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as recemmend in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).

Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE614 from Bremerhaven, Germany to Bremerhaven, Germany

Water clarity and color were observed during the RV HEINCKE cruise HE614 (01.03.2023 to 21.03.2023), from Bremerhaven, Germany to Bremerhaven, Germany) using a white Secchi disc with a diameter of 40 cm and a Forel-Ule color scale. The Secchi depth (SD) was recorded as a relative measure of water clarity at each in situ station during day time. At half SD the apparent color of the water above the submerged Secchi disc was determined using the Forel-Ule color scale. A Forel-Ule color scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as recemmend in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).

Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE609 from Bremerhaven, Germany to Bremerhaven, Germany

Water clarity and color were observed during the RV HEINCKE cruise HE609 (04.10.2022 to 26.10.2022), from Bremerhaven, Germany to Bremerhaven, Germany) using a white Secchi disc with a diameter of 40 cm and a Forel-Ule color scale. The Secchi depth (SD) was recorded as a relative measure of water clarity at each in situ station during day time. At half SD the apparent color of the water above the submerged Secchi disc was determined using the Forel-Ule color scale. A Forel-Ule color scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as recemmend in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).

FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2207 during RV Burchana cruise

The submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign.

FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2205 during RV Burchana cruise

The submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign.

FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2203 during RV Burchana cruise

The submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign.

FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2205 during RV Burchana cruise

The submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign.

FerryBox-integrated membrane-based pCO2, temperature, salinity, oxygen, chlorophyll, turbidity and pH measurements of BU-C-2110 during RV Burchana cruise

The submitted data were collected with a FerryBox-Device on RV Burchana in the transitional and coastal waters of Lower Saxony, Germany. It contains data for temperature, salinity, pH, chlorophyll, oxygen, turbidity and carbon dioxide partial pressure (pCO2) at a water depth of approximately 1.3 m. Within the Carbostore project, totally 8 measurement campaigns were carried out in the years 2021 to 2023. The data is reprocessed and related to a 60 s period. In order to obtain a complete (but rough) overview of the pCO2 situation in this area, values outside the calibration limits (200-1000 µatm) were retained. Dissolved oxygen measurements were corrected by temperature and salinity. The sensors are regularly calibrated, maintained and replaced if necessary. The files are named according to the project, the year and the month of the campaign.

Sediment and incubation characteristics from the southeastern North Sea during Heincke cruise HE582 in August and September 2021

This dataset comprises biogeochemical and sedimentological measurements from surface sediments collected in the southern North Sea during the HEINCKE HE582 campaign in August and September 2021. Surface sediment of the southern North Sea was incubated in flow through reactors (~24h) to quantify benthic oxygen consumption, net silicate turnover, ammonium and nitrate turnover (net and gross rates). Net turnover was derived from concentration gradients between inflow and outflow water under controlled laboratory conditions. Gross turnover was derived using 15NH4 and 15NO3 tracer. Following the incubations, the surface sediment was analyzed for sediment characteristics, including phaeophytin-a, chlorophyll-a, grain size, mud content, TOC and carbohydrates. For a more detailed methodological description please refer to Minutolo et al. (2024).

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