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EGC-DrIFT drifter dataset Kulusuk deployment 2019
No full textThis dataset contains drifter data from an August 2019 deployment, at the east greenland shelfbreak, 65N. The netcdf file contains the positions, speeds, and measurements (Temperature and Salinity when available) of both CARTHE and SVP drifters
NIOZ jetty Marsdiep high water selected dates for Amaral-Zettler publication Water Research 2021 117289
No full textNIOZ jetty (LON=4.789E, LAT=53.002N) Marsdiep biological time series. 40 samples a year, weekly in growing season, biweekly outside of growing season. Secchi depth and bucket sample of surface water at high tide (North Sea waters) with subsequent analysis of T, S, TSM, TP, PO4, NO3, NO2, NH4, Si, DIC, Chla
Diapycnal nutrient mixing
No full textIn this data file nutrient, DFe and raw CTD data are available used for the paper
"Diapycnal mixing across the photic zone of the NE-Atlantic".
Variable physical conditions such as vertical turbulent exchange, internal wave and mesoscale eddy action, affect the availability of light and nutrients for phytoplankton (unicellular algae) growth. It is hypothesized that changes in ocean temperature may affect ocean vertical density stratification, which may hamper vertical exchange. In order to quantify variations in physical conditions in the Northeast Atlantic Ocean, we sampled a latitudinal transect along 17 degrees 5minutes W between 30 and 63 degrees N in summer. A shipborne Conductivity-Temperature-Depth CTD-instrumented package was used with a custom-made modification of the pump-inlet to minimize detrimental effects of ship motions on its data. Thorpe-scale analysis was used to establish turbulence values for the upper 500 m from 3 to 6 profiles obtained in a short CTD-yoyo, 3 to 5 h after local sunrise. From south to north, average temperature decreased together with stratification while turbulence values weakly increased or remained constant. Vertical turbulent nutrient fluxes did not vary significantly with stratification and latitude. This apparent lack of correspondence between turbulent mixing and temperature is likely due to internal waves breaking (increased stratification can support more internal waves), acting as a potential feed-back mechanism. As this feed-back mechanism mediates potential physical environment changes in temperature, global surface ocean warming may not affect the vertical nutrient fluxes to a large degree. We urge modelers to test this deduction as it could imply that the future summer phytoplankton productivity in stratified oligotrophic waters would experience little alterations in nutrient input from deeper waters
OSPAR ICG-EMO riverine database 2020-05-01 used in 2020 workshop
No full textThe OSPAR ICG-EMO riverine loads as used in the OSPAR ICG-EMO 2020 workshop by participating modelling centres. Daily values for flow and nutrient loads (TN, TP, PO4, NO3, NO2, Si, SPM, TALK, DIC, DOC, Fe where available), worked up for use in ecosystem modelling from original data
NIOZ jetty hourly data for temperature and salinity for 2007
No full textNIOZ jetty LON=4.789E LAT=53.002N, using EXO sensor at depth of -1.5 meter NAP. Derived product from 10 second calibrated data. Separate calibration measurement at 2 week intervals
NIOZ jetty hourly data for temperature and salinity for 2020
No full textNIOZ jetty LON=4.789E LAT=53.002N, using EXO sensor at depth of -1.5 meter NAP. Derived product from 10 second calibrated data. Separate calibration measurement at 2 week intervals
NIOZ jetty hourly data for temperature and salinity for 2013
No full textNIOZ jetty LON=4.789E LAT=53.002N, using EXO sensor at depth of -1.5 meter NAP. Derived product from 10 second calibrated data. Separate calibration measurement at 2 week intervals
Viral lysis modifies seasonal phytoplankton dynamics and carbon flow in the Southern Ocean
No full textPhytoplankton form the base of marine food webs and are a primary means for carbon export in the Southern Ocean, a key area for global pCO2 drawdown. Viral lysis and grazing have very different effects on microbial community dynamics and carbon export, yet, very little is known about the relative magnitude and ecological impact of viral lysis on natural phytoplankton communities, especially in Antarctic waters. Here, we report on the temporal dynamics and relative importance of viral lysis rates, in comparison to grazing, for Antarctic nano- and pico-sized phytoplankton of varied taxonomy and size over a full productive season. Our results show that viral lysis was a major loss factor throughout the season, responsible for roughly half (58%) of seasonal phytoplankton carbon losses. Viral lysis appeared critically important for explaining temporal dynamics and for obtaining a complete seasonal mass balance of Antarctic phytoplankton. Group-specific responses indicated a negative correlation between grazing and viral losses in Phaeocystis and picoeukaryotes, while for other phytoplankton groups losses were more evenly spread throughout the season. Cryptophyte mortality was dominated by viral lysis, whereas small diatoms were mostly grazed. Larger diatoms dominated algal carbon flow and a single ???lysis event??? directed > 100% of daily carbon production away from higher trophic levels. This study highlights the need to consider viral lysis of key Antarctic phytoplankton for a better understanding of microbial community interactions and more accurate predictions of organic matter flux in this climate-sensitive region
NIOZ jetty hourly data for temperature and salinity for 2006
No full textNIOZ jetty LON=4.789E LAT=53.002N, using EXO sensor at depth of -1.5 meter NAP. Derived product from 10 second calibrated data. Separate calibration measurement at 2 week intervals
Field observations of HDPE pellets lost by MSC Zoe collected through citizen science via waddenplastic.nl by NIOZ and RUG.
No full textField observations, obtained through citizen science, collected via waddenplastic.nl, of washed-up HDPE pellets lost by container vessel MSC Zoe on 1 January 2019 north of the Dutch Wadden islands. Counts in number categories (0,1-10,11-100,>100) within 0.4x0.4 m squares, typically on strand lines. Published in: doi: 10.3389/fmars.2021.60720