cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25850/nioz/7b.b.xg
title: Habitat modification by marram grass negatively affects recruitment of conspecifics

description: Ecosystem engineers alter their environment often benefiting their own survival and growth yielding self-reinforcing feedbacks. Moreover, these habitat modifications have been found to facilitate recruitment of conspecifics for some species, while for others engineering inhibits recruitment. Whether dune grasses facilitate or inhibit recruitment of conspecifics is yet unknown. Here, we investigated how habitat modification by European marram grass (Ammophila arenaria) through embryonic dune development affects recruitment from seeds and marine dispersed rhizome fragments. Specifically, we tested at three locations with different dune morphologies how habitat modification affected natural seed and rhizome presence and shoot emergence from plots in which seeds or rhizome fragments were added. In addition, we investigated how sediment burial (i.e., the main effect of habitat modification by dune grasses) affected germination and emergence in a controlled experiment. Results show that regardless of habitat modification or beach width, seeds and rhizomes were absent in natural conditions. Habitat modification negatively affected shoot emergence from seeds (8x less) and rhizomes (4x less) and was negatively related to sediment dynamics. Furthermore, fewer seedlings were found with higher elevations. In controlled laboratory conditions, the highest seedling emergence was found with slight burial (0.5-3cm); both germination and seedling emergence decreased as seeds were buried deeper or shallower. Overall, habitat modification by marram grass negatively affects recruitment of conspecifics through increased sediment dynamics and elevation. Consequently, storm events or eradication programs that include removal of adult vegetation - which leads to an unmodified system - might benefit new recruitment from seeds or clonal fragments.
DOI: 10.25850/nioz/7b.b.rb
title: High-resolution current meter and hydrographic data from the Irminger Current mooring array 2014-2015

description: The Irminger Current mooring array consists of 5 subsurface ocean moorings in the Irminger Current on the Reykjanes Ridge in the North Atlantic Ocean. The second high-resolution data set of oceanographic variables from instrumentation on these moorings was collected from 11 July 2014 to 10 July 2015. The moorings are named IC0, IC1, IC2, IC3, and IC4 going from west to east. The Irminger Current mooring array is part of the international Overturning of the Subpolar North Atlantic Program (OSNAP, www.o-snap.org) which runs from 2014 to at least 2018. The data set consists ocean temperature, salinity, current velocities, pressure and time. Variables were collected at different time intervals, varying from 5 minutes to 1 hour. The data have been calibrated and quality controlled. The data and metadata are stored in NetCDF files following the Climate Forecast (CF) conventions, see http://cfconventions.org
DOI: 10.25850/nioz/7b.b.sb
title: High-resolution current meter and hydrographic data from the Irminger Current mooring array 2015-2016

description: The Irminger Current mooring array consists of 5 subsurface ocean moorings in the Irminger Current on the Reykjanes Ridge in the North Atlantic Ocean. The second high-resolution data set of oceanographic variables from instrumentation on these moorings was collected from 15 July 2015 to 6 August 2016. The moorings are named IC0, IC1, IC2, IC3, and IC4 going from west to east. The Irminger Current mooring array is part of the international Overturning of the Subpolar North Atlantic Program (OSNAP, www.o-snap.org) which runs from 2014 to at least 2018. The data set consists ocean temperature, salinity, current velocities, pressure and time. Variables were collected at different time intervals, varying from 5 minutes to 1 hour. The data have been calibrated and quality controlled. The data and metadata are stored in NetCDF files following the Climate Forecast (CF) conventions, see http://cfconventions.org/
DOI: 10.6084/m9.figshare.20481021.v1
title: Bias-correction and Test for Mark-point Dependence with Replicated Marked Point Processes

description: Mark-point dependence plays a critical role in research problems that can be fitted into the general framework of marked point processes. In this work, we focus on adjusting for mark-point dependence when estimating the mean and covariance functions of the mark process, given independent replicates of the marked point process. We assume that the mark process is a Gaussian process and the point process is a log-Gaussian Cox process, where the mark-point dependence is generated through the dependence between two latent Gaussian processes. Under this framework, naive local linear estimators ignoring the mark-point dependence can be severely biased. We show that this bias can be corrected using a local linear estimator of the cross-covariance function and establish uniform convergence rates of the bias-corrected estimators. Furthermore, we propose a test statistic based on local linear estimators for mark-point independence, which is shown to converge to an asymptotic normal distribution in a parametric n-convergence rate. Model diagnostics tools are developed for key model assumptions and a robust functional permutation test is proposed for a more general class of mark-point processes. The effectiveness of the proposed methods is demonstrated using extensive simulations and applications to two real data examples.
DOI: 10.25850/nioz/7b.b.mg
title: Hydrography and velocity data from the Long-term Ocean Circulation Observations (LOCO) mooring in the central Irminger Sea: Deployment nine (LOCO2_9) July 2011 to August 2012

description: The data set under this specific DOI contains data from the ninth LOCO2 deployment (LOCO2_9), from 29 July 2011 to 1 August 2012. Data from other deployments can be found through the related identifyers. The LOCO2 mooring was started as part of the Dutch Long-term Ocean Circulation Observations project. LOCO2 was moored in the central Irminger Sea at approximately 59.2N, 39.5W from summer 2003 until summer 2018. It was equipped with Acoustic Doppler Current Profilers for the upper ocean (400m) and deep ocean (&gt;2500m) circulation, a near bottom SBE37 to record the temperature and salinity of the Denmark Strait Overflow Water and (from the 10th deployment onwards) another SBE37 at around 150m. A McLane Moored Profiler (MMP) equipped with a CTD was programmed to make profiles along the mooring cable between ~150m depth and ~2400m depth. LOCO2 was positioned in the center of the Irminger Gyre, underneath the strong atmospheric forcing of the Greenland Tip Jet, in order to study deep winter convection in the Irminger Sea. Data and results are described in the following publications: - de Jong, M. F., van Aken, H. M., V?ge, K., and R. S. Pickart (2012). Convective mixing in the central Irminger Sea: 2002-2010. Deep-Sea Research I, 63, 36-51. https://doi.org/10.1016/j.dsr.2012.01.003 - van Aken, H. M., and M. F. de Jong (2012). Hydrographic variability of Denmark Strait Overflow Water near Cape Farewell with multi-decadal to weakly time scales. Deep-Sea Research I, 66, 41-50. https://doi.org/10.1016/j.dsr.2012.04.004 - de Jong, M. F. and L. de Steur (2016). Strong winter cooling over the Irminger Sea in winter 2014-2015, exceptional deep convection, and the emergence of anomalously low SST. Geophysical Research Letters, 43, 13, 7106-7113. https://doi.org/10.1002/2016GL069596 - de Jong, M.F., M. Oltmanns, J. Karstensen, and L. de Steur (2018). Deep convection in the Irminger Sea observed with a dense mooring array. Oceanography 31(1):50?59. https://doi.org/10.5670/oceanog.2018.109 - de Jong, M.F., Fogaren, K.E., Le Bras, I., Trafford, L. and H. Palevsky (submitted 2023). Convection in the central Irminger Sea; insights into variability and the roles of surface forcing and stratification from 19 years of high resolution mooring data.
DOI: 10.25850/nioz/7b.b.pg
title: Hydrography and velocity data from the Long-term Ocean Circulation Observations (LOCO) mooring in the central Irminger Sea: Deployment eleven (LOCO2_11) September 2014 to July 2015

description: The data set under this specific DOI contains data from the eleventh LOCO2 deployment (LOCO2_11), from 16 September 2014 to 18 July 2015. Data from other deployments can be found through the related identifyers. The LOCO2 mooring was started as part of the Dutch Long-term Ocean Circulation Observations project. LOCO2 was moored in the central Irminger Sea at approximately 59.2N, 39.5W from summer 2003 until summer 2018. It was equipped with Acoustic Doppler Current Profilers for the upper ocean (400m) and deep ocean (&gt;2500m) circulation, a near bottom SBE37 to record the temperature and salinity of the Denmark Strait Overflow Water and (from the 10th deployment onwards) another SBE37 at around 150m. A McLane Moored Profiler (MMP) equipped with a CTD was programmed to make profiles along the mooring cable between ~150m depth and ~2400m depth. LOCO2 was positioned in the center of the Irminger Gyre, underneath the strong atmospheric forcing of the Greenland Tip Jet, in order to study deep winter convection in the Irminger Sea. Data and results are described in the following publications: - de Jong, M. F., van Aken, H. M., V?ge, K., and R. S. Pickart (2012). Convective mixing in the central Irminger Sea: 2002-2010. Deep-Sea Research I, 63, 36-51. https://doi.org/10.1016/j.dsr.2012.01.003 - van Aken, H. M., and M. F. de Jong (2012). Hydrographic variability of Denmark Strait Overflow Water near Cape Farewell with multi-decadal to weakly time scales. Deep-Sea Research I, 66, 41-50. https://doi.org/10.1016/j.dsr.2012.04.004 - de Jong, M. F. and L. de Steur (2016). Strong winter cooling over the Irminger Sea in winter 2014-2015, exceptional deep convection, and the emergence of anomalously low SST. Geophysical Research Letters, 43, 13, 7106-7113. https://doi.org/10.1002/2016GL069596 - de Jong, M.F., M. Oltmanns, J. Karstensen, and L. de Steur (2018). Deep convection in the Irminger Sea observed with a dense mooring array. Oceanography 31(1):50?59. https://doi.org/10.5670/oceanog.2018.109 - de Jong, M.F., Fogaren, K.E., Le Bras, I., Trafford, L. and H. Palevsky (submitted 2023). Convection in the central Irminger Sea; insights into variability and the roles of surface forcing and stratification from 19 years of high resolution mooring data.
DOI: 10.25850/nioz/7b.b.ng
title: Hydrography and velocity data from the Long-term Ocean Circulation Observations (LOCO) mooring in the central Irminger Sea: Deployment ten (LOCO2_10) August 2012 to July 2014

description: The data set under this specific DOI contains data from the tenth LOCO2 deployment (LOCO2_10), from 2 August 2012 to 26 July 2014. Data from other deployments can be found through the related identifyers. The LOCO2 mooring was started as part of the Dutch Long-term Ocean Circulation Observations project. LOCO2 was moored in the central Irminger Sea at approximately 59.2N, 39.5W from summer 2003 until summer 2018. It was equipped with Acoustic Doppler Current Profilers for the upper ocean (400m) and deep ocean (&gt;2500m) circulation, a near bottom SBE37 to record the temperature and salinity of the Denmark Strait Overflow Water and (from the 10th deployment onwards) another SBE37 at around 150m. A McLane Moored Profiler (MMP) equipped with a CTD was programmed to make profiles along the mooring cable between ~150m depth and ~2400m depth. LOCO2 was positioned in the center of the Irminger Gyre, underneath the strong atmospheric forcing of the Greenland Tip Jet, in order to study deep winter convection in the Irminger Sea. Data and results are described in the following publications: - de Jong, M. F., van Aken, H. M., V?ge, K., and R. S. Pickart (2012). Convective mixing in the central Irminger Sea: 2002-2010. Deep-Sea Research I, 63, 36-51. https://doi.org/10.1016/j.dsr.2012.01.003 - van Aken, H. M., and M. F. de Jong (2012). Hydrographic variability of Denmark Strait Overflow Water near Cape Farewell with multi-decadal to weakly time scales. Deep-Sea Research I, 66, 41-50. https://doi.org/10.1016/j.dsr.2012.04.004 - de Jong, M. F. and L. de Steur (2016). Strong winter cooling over the Irminger Sea in winter 2014-2015, exceptional deep convection, and the emergence of anomalously low SST. Geophysical Research Letters, 43, 13, 7106-7113. https://doi.org/10.1002/2016GL069596 - de Jong, M.F., M. Oltmanns, J. Karstensen, and L. de Steur (2018). Deep convection in the Irminger Sea observed with a dense mooring array. Oceanography 31(1):50?59. https://doi.org/10.5670/oceanog.2018.109 - de Jong, M.F., Fogaren, K.E., Le Bras, I., Trafford, L. and H. Palevsky (submitted 2023). Convection in the central Irminger Sea; insights into variability and the roles of surface forcing and stratification from 19 years of high resolution mooring data.
DOI: 10.25850/nioz/7b.b.qg
title: Hydrography and velocity data from the Long-term Ocean Circulation Observations (LOCO) mooring in the central Irminger Sea: Deployment twelve (LOCO2_12) July 2015 to August 2016

description: The data set under this specific DOI contains data from the twelfth LOCO2 deployment (LOCO2_12), from 19 July 2015 to 2 August 2016. Data from other deployments can be found through the related identifyers. The LOCO2 mooring was started as part of the Dutch Long-term Ocean Circulation Observations project. LOCO2 was moored in the central Irminger Sea at approximately 59.2N, 39.5W from summer 2003 until summer 2018. It was equipped with Acoustic Doppler Current Profilers for the upper ocean (400m) and deep ocean (&gt;2500m) circulation, a near bottom SBE37 to record the temperature and salinity of the Denmark Strait Overflow Water and (from the 10th deployment onwards) another SBE37 at around 150m. A McLane Moored Profiler (MMP) equipped with a CTD was programmed to make profiles along the mooring cable between ~150m depth and ~2400m depth. LOCO2 was positioned in the center of the Irminger Gyre, underneath the strong atmospheric forcing of the Greenland Tip Jet, in order to study deep winter convection in the Irminger Sea. Data and results are described in the following publications: - de Jong, M. F., van Aken, H. M., V?ge, K., and R. S. Pickart (2012). Convective mixing in the central Irminger Sea: 2002-2010. Deep-Sea Research I, 63, 36-51. https://doi.org/10.1016/j.dsr.2012.01.003 - van Aken, H. M., and M. F. de Jong (2012). Hydrographic variability of Denmark Strait Overflow Water near Cape Farewell with multi-decadal to weakly time scales. Deep-Sea Research I, 66, 41-50. https://doi.org/10.1016/j.dsr.2012.04.004 - de Jong, M. F. and L. de Steur (2016). Strong winter cooling over the Irminger Sea in winter 2014-2015, exceptional deep convection, and the emergence of anomalously low SST. Geophysical Research Letters, 43, 13, 7106-7113. https://doi.org/10.1002/2016GL069596 - de Jong, M.F., M. Oltmanns, J. Karstensen, and L. de Steur (2018). Deep convection in the Irminger Sea observed with a dense mooring array. Oceanography 31(1):50?59. https://doi.org/10.5670/oceanog.2018.109 - de Jong, M.F., Fogaren, K.E., Le Bras, I., Trafford, L. and H. Palevsky (submitted 2023). Convection in the central Irminger Sea; insights into variability and the roles of surface forcing and stratification from 19 years of high resolution mooring data.
DOI: 10.25850/nioz/7b.b.rg
title: Hydrography and velocity data from the Long-term Ocean Circulation Observations (LOCO) mooring in the central Irminger Sea: Deployment thirteen (LOCO2_13) August 2016 to June 2018

description: The data set under this specific DOI contains data from the thirteenth LOCO2 deployment (LOCO2_13), from 3 August 2016 to 16 June 2018. This is the last LOCO2 deployment. Data from other deployments can be found through the related identifyers. The LOCO2 mooring was started as part of the Dutch Long-term Ocean Circulation Observations project. LOCO2 was moored in the central Irminger Sea at approximately 59.2N, 39.5W from summer 2003 until summer 2018. It was equipped with Acoustic Doppler Current Profilers for the upper ocean (400m) and deep ocean (&gt;2500m) circulation, a near bottom SBE37 to record the temperature and salinity of the Denmark Strait Overflow Water and (from the 10th deployment onwards) another SBE37 at around 150m. A McLane Moored Profiler (MMP) equipped with a CTD was programmed to make profiles along the mooring cable between ~150m depth and ~2400m depth. LOCO2 was positioned in the center of the Irminger Gyre, underneath the strong atmospheric forcing of the Greenland Tip Jet, in order to study deep winter convection in the Irminger Sea. Data and results are described in the following publications: - de Jong, M. F., van Aken, H. M., V?ge, K., and R. S. Pickart (2012). Convective mixing in the central Irminger Sea: 2002-2010. Deep-Sea Research I, 63, 36-51. https://doi.org/10.1016/j.dsr.2012.01.003 - van Aken, H. M., and M. F. de Jong (2012). Hydrographic variability of Denmark Strait Overflow Water near Cape Farewell with multi-decadal to weakly time scales. Deep-Sea Research I, 66, 41-50. https://doi.org/10.1016/j.dsr.2012.04.004 - de Jong, M. F. and L. de Steur (2016). Strong winter cooling over the Irminger Sea in winter 2014-2015, exceptional deep convection, and the emergence of anomalously low SST. Geophysical Research Letters, 43, 13, 7106-7113. https://doi.org/10.1002/2016GL069596 - de Jong, M.F., M. Oltmanns, J. Karstensen, and L. de Steur (2018). Deep convection in the Irminger Sea observed with a dense mooring array. Oceanography 31(1):50?59. https://doi.org/10.5670/oceanog.2018.109 - de Jong, M.F., Fogaren, K.E., Le Bras, I., Trafford, L. and H. Palevsky (submitted 2023). Convection in the central Irminger Sea; insights into variability and the roles of surface forcing and stratification from 19 years of high resolution mooring data.
DOI: 10.25850/nioz/7b.b.cf
title: Influence of Irradiance and Temperature on the Virus MpoV-45T Infecting the Arctic Picophytoplankter Micromonas polaris - Data

description: Arctic marine ecosystems are currently undergoing rapid changes in temperature and light availability. Picophytoplankton, such as Micromonas polaris, are predicted to benefit from such changes. However, little is known about how these environmental changes affect the viruses that exert a strong mortality pressure on these small but omnipresent algae. Here we report on one-step infection experiments, combined with measurements of host physiology and viability, with 2 strains of M. polaris and the virus MpoV-45T under 3 light intensities (5, 60 and 160 ?mol quanta m?2 s?1), 2 light period regimes (16:8 and 24:0 h light:dark cycle) and 2 temperatures (3 and 7?C). Our results show that low light intensity (16:8 h light:dark) delayed the decline in photosynthetic efficiency and cell lysis, while decreasing burst size by 46%. In contrast, continuous light (24:0 h light:dark) shortened the latent period by 5 h for all light intensities, and even increased the maximum virus production rate and burst size under low light (by 157 and 69%, respectively). Higher temperature (7?C vs 3?C) led to earlier cell lysis and increased burst size (by 19%), except for the low light conditions. These findings demonstrate the ecological importance of light in combination with temperature as a controlling factor for Arctic phytoplankton host and virus dynamics seasonally, even more so in the light of global warming.
DOI: 10.25850/nioz/7b.b.sg
title: Loss of nitrogen via anaerobic ammonium oxidation (anammox) in the California current system during the late Quaternary

description: The California current system (CCS) hosts one of the largest oxygen minimum zones (OMZs) in the world: the Eastern North Pacific (ENP) OMZ, which is dissociated into a subtropical and tropical region (i.e., the ESTNP and ETNP). In the modern ENP OMZ, bioavailable nitrogen (N) is lost via denitrification and anaerobic ammonium oxidation (anammox). Even so, paleo-reconstructions of N-loss have focused solely on denitrification. Fluctuations in bulk sedimentary ?15N over glacial-interglacial cycles have been interpreted to reflect variations in denitrification rates in response to ETNP OMZ intensity changes. This ?15N signal is thought to be transported northwards to the ESTNP OMZ. Here, we present the first CCS sedimentary record of ladderane lipids, biomarkers for anammox, located within the ESTNP OMZ (32?N; 118?W). Over the last two glacial terminations (~160 cal ka BP), ladderane concentrations were analysed in combination with the index of ladderanes with five cyclobutane moieties (NL5), short-chain (SC) ladderane degradation products, and productivity proxies. This shows that: 1) ladderanes derived from anammox bacteria living within the ESTNP OMZ water column; 2) ladderanes were continuously present, with relatively high concentrations during both glacial- and interglacial-periods, showcasing the ESTNP OMZ must have retained an anoxic core in which N-loss occurred; and 3) anammox abundance appears to have been driven both by OM-remineralization and advection changes, which regulated nutrient and oxygen levels. Our study shows that anammox was an important feature in the CCS and provides a more holistic picture of N-loss dynamics and the development of the ESTNP OMZ over glacial-interglacial cycles. Lastly, ladderanes and their SC-products were also detected in 160?500 cal ka BP sediments (15.7?37.5 mbsf; analysed at a low temporal resolution), highlighting their potential as anammox biomarkers in relatively deeper buried sediments for future studies.
DOI: 10.25850/nioz/7b.b.v
title: Long-term moorings observations in the southwestern Rockall Trough (Logachev cold-water coral mound province) .

description: Two long-term moorings were deployed in the Logachev mound province from May 2017-May 2018 recording physical parameters and collecting particle fluxes. Moorings were deployed on the relatively shallow Rockall Bank and the deep Oreo Mound. In addition, CTD water-profiling was conducted during Pelagia cruise 64PE420 in May 2017 and Pelagia cruise 64PE436 in May 2018.
DOI: 10.25850/nioz/7b.b.9
title: Model results of particle tracking model simulating microplastics dispersal in the North Sea, including runs representing the MSC Zoe accident.

description: Output files from particle tracking model scenario runs: generic dispersal scenarios for the North Sea for 2017, and scenario runs representing releases of the MSC Zoe accident (2019). Simulated particles represent floating 5mm HDPE pellets, and sinking 0.5mm PS grains. Releases were typically 10000-20000 particles for each scenario. Further details are described in the accompanying publication doi: 10.3389/fmars.2021.607203 (Related Identifier). The files contain daily particle positions with accompanying hydrodynamic information.