38 |
Cruise Report, RV ATAIR, Cruise 0671013-1, Bremerhaven - Skagen - Aberdeen, 19 Jul - 11 Aug 2022
any data for this region. A depleted TSG clock battery identified at the beginning of the cruise
resulted in a delayed start regarding the data logging.
In order to check on quality performance of the TSG system, water samples were taken about
once a day directly from the TSG system and analysed with an AUTOSAL salinometer. Stand-
ard operational procedures (SOP) to assess the data quality of the near-surface temperature
and conductivity/salinity measurements from the TSG system installed aboard RV ATAIR are
presently under development on a national level and carried out in collaboration with the Ger-
man Marine Research Alliance (DAM). Once the SOP have been implemented, and the data
quality control has been finalised and documented, resulting data will be made publically avail-
able via submission to the PANGAEA database (https://www.pangaea.de). Regarding the
ECO sensor data, there are not yet any defined SOP, and any data quality check is presently
not carried out regarding near-surface mesurements for fluorescence and turbidity.
“ -
SBE21
SBE38
WetLabs ECO
FLNTURT
thermosalinograph,
conductivity and in-
ternal temperature
axternal temperature
transmissiometer,
fluorescence and
turbidity
3a ZE1 a IL
5
#£}?
11173
FLNTURT-5883
24 Mar 2022
28 Jun 2022
Table 7.1. Sensor specification of the Thermosalinograph/fluormeter system operated during cruise
0671013-1
Figures 7.3 provides an overview on the temporal evolution of the TSG/ECO-sensor-derived
properties. TSG-derived temperature at a depth of 4 m ranged from 11.8°C to 21.1°C and was
on average 15.5°C. TSG-derived salinity ranged from 27.26 to 35.23 and was on average
33.95. Fluorescence ranged from 0.17 ug/l to 5.05 ug/l and was on average 0.41 ug/l. Turbidity
ranged from 0.31 NTU to 4.92 NTU and was on average 0.064 NTU. Strong wind events ex-
perienced while crossing the Dogger Bank or while operating in the Skagerrak or in the north-
western corner of the region of interest resulted in air bubbles being trapped in the water and
flushed into the TSG system, causing an elevated amount of errorneous data. The strong de-
viations noted between the ECO sensor-based and the underway measurements (lower pan-
als in Fiaure 7.3) still need to be investigated.
Figures 7.4 to 7.7 show spatial distributions of the respective near-surface temperature, salin-
ity, fluorescence and turbidity during the entire cruise 067/013-1.
