Continental Shelf Research

This file contains supplemental data for a manuscript entitled, "Retention of alluvial sediment in the tidal delta of a river draining a small, mountainous coastal watershed," published in Continental Shelf Research. Data files include particle size distribution, sediment core chronologies, sediment elemental abundance, and sediment bulk density and organic content for eight analyzed sediment cores. Data is in excel format; description is found in at the readme tab in each file.

Major and minor elements concentrations in sediment cores from the NW Mexican margin.

A sampling of 179 stations (regular grid, distance of 500 m between stations) was conducted in January and February 2016 (on 19, 20, 21 January 2016, with tidal coefficients of 56 to 72; and on 13 February 2016, with a tidal coefficient of 94) using a 0.04 m2 Shipeck grab aboard the GPMH (Grand Port Maritime du Havre) vessel “Le Marais”, between the Cap de la Hève and the Cap d’Antifer (Bay of Seine). Colum A to C: Coordinates in decimal degrees for all stations studied between Cape Hève and Cape Antifer. Column D to I, XRF measurement results (Xsort, ppm) for Si (silicon), S (sulphide), As (arsenic), BrOrg (organic bromine), Rb (rubidium), Pb (lead). Column J: TOC content obtained by combustion in a LECO CS 744 carbon sulphur analyzer (%). Column K and L: mediane and mean of Particule size, analyzed with laser diffraction particle-size analysez. Column M: group defined for interpretation into publication.

Data provided with this paper: - Spreadsheet with values for marine relative flooded area, flooding magnitude, flooding rate and coastline length, for each sea-level increment and latitudinal zone (GBR_flooding_summary_latitudinal_zones.xlsx) - Files with values for marine relative flooded area, flooding magnitude, flooding rate and coastline length grouped by sub-region (COASTLINE_length_subRegions.csv, COASTLINE_length_change_subRegions.csv, SHELF_relative_flooding_subRegions.csv, SHELF_flooding_magnitude_rate_subRegions.csv, SHELF-MARGIN_relative_flooding_subRegions.csv, SHELF-MARGIN_flooding_magnitude_rate_subRegions.csv). - Spreadsheet with age control for shelf-edge boreholes shown in Figure 2 and some plots (Age_control_cores_GR.xlsx). Data extracted from Felis et al. (2014) and Webster et al. (2011) and used to link the boreholes and Gamma ray logs to the flooding curves.

Sheet 1:sample metadata Sheet 2: palynofacies counts Sheet 3: dinocyst counts Sheet 4: miospore counts

ES-1: Location of sampling stations. The results of the geochemical and mineralogical analysis as well as Pearson correlation coefficients (r). ES-2: Supplementary Figures S1-S7

These data include salinity and oxygen isotope measurements of water samples collected from coastal sites along the Gulf of Maine between 2003 and 2015. In particular, a suite of samples were collected along the coast of Maine, east of Penobscot Bay, on a monthly basis between April 2014 and March 2015. These data also include several freshwater samples collected from the Kennebec and Penobscot Rivers on a semi-monthly basis in 2014 and 2015. For the water samples with sample IDs starting with DSW, JSW, NSW, or OSW: The water samples were collected by hand from shore or boat using French square glass bottles with phenolic polycone lined caps. Salinity was measured using a Oakton SALT 6+ handheld salinity meter. Oxygen isotopes were measured using a Picarro L2130-i Isotopic Liquid Water Analyzer with an attached autosampler. Water samples with sample IDs starting with ASW were collected from shore. Samples with sample IDs starting with DMC 2010 were collected at the flowing seawater laboratory at the Darling Marine Center. Samples with sample IDs starting with Summer 2011 were collected from a boat. For these last 3 sample types (ASW, DMC 2010, Summer 2011): Salinity was measured with YSI Professional Plus salinity meter and oxygen isotopes were measured using a Picarro L1102-i Isotopic Liquid Water Analyzer with an attached autosampler. Data from Owen et al., 2008 and Wanamaker et al. (2006, 2007) was collected from the flowing seawater laboratory at the Darling marine center. Salinity was measured using a YSI model 85 oxygen, conductivity, salinity, and temperature system and oxygen isotopes were measured using a dual-inlet VG/Micromass SIRA (CO2–H2O equilibration method at 30 °C for 12 h).

Radiolarians are planktonic protozoon that play an important role in marine ecosystem and paleoenvironmental construction. The South China Sea (SCS) and Malacca Strait (MLS), strongly influenced by the East Asian monsoon, are the key gateway between the Pacific and Indian Oceans. However, a few plankton studies of radiolarians are performed during winter and spring in the SCS and MLS due to the adverse sea conditions. In this study the use of a ship-board plankton net rendered it possible to obtain shallow water samples (~5 m depth) along transects from the northern SCS to MLS during the spring of 2017 and winter of 2017-2018. The results show that partitioning among Spumellaria, Nassellaria and Collodaria radiolarians differed spatially and seasonally. The high partition of Collodaria and low partition of Nassellaria are potential indicators of the strongly stratified waters with low nutrients for paleoceanographic studies in the slope and basin SCS. The radiolarian assemblages in the MLS are quite different from those in the SCS, that is, the two communities are largely independent, suggesting that advective transport between the MLS and SCS is rare. There are obvious seasonal variations in species diversity and abundance in both the MLS and SCS, generally with higher biodiversity and maximum abundances in winter. The results of Q-mode cluster analysis showed that radiolarian assemblages during winter were grouped together in the slope and basin SCS, and their distributions had moved to the southwest relative to those in spring. The results demonstrate the East Asian monsoon has a significant controlling effect on radiolarian diversity and geographic distribution in the studied areas. We also established five candidates for weakly stratified waters with high nutrients: Archiperidium hexacantha, Acanthodesmia vinculatus, Peromelissa phalacra, Dictyocoryne muelleri, and Tetrapyle octacantha. Thus, this study increases the knowledge of radiolarian geographic distribution in the tropics as a whole, as well as revealing the sensitive response of radiolarians to the regional environments, a fact which may prove useful for reconstructing the paleoceanographic changes.

Holocene carbon accumulation rates from three sediment records from bays Trampa, Caribe and Churruca (sites BT, BC and CHU) in the western Magellan fjord system.

The role of small scale single turbulent events in the vertical mixing of near bed suspended sediments was explored in a shallow shelf sea environment. High frequency velocity and suspended sediment concentration (SSC; calibrated from the backscatter intensity) were collected using an Acoustic Doppler Velocimeter (ADV). Using quadrant analysis, the despiked velocity time series was divided into turbulent events and small background fluctuations. Reynolds stress and Turbulent Kinetic Energy (TKE) calculated from all velocity samples, were compared to the same turbulent statistics calculated only from velocity samples classified as turbulent events (Re_events and TKE_events). The comparison showed that Re_events and TKE_events was increased 3 and 1.6 times, respectively, when small background fluctuations were removed and that the correlation with SSC for TKE could be improved through removal of the latter. The correlation between instantaneous vertical turbulent flux (w') and SSC fluctuations (SSC') exhibits a tidal pattern with the maximum correlation at peak ebb and flood currents, when strong turbulent events appear. Individual turbulent events were characterized by type, strength, duration and length. Cumulative vertical turbulent sediment fluxes and average SSC associated with individual turbulent events were calculated. Over the tidal cycle, ejections and sweeps were the most dominant events, transporting 50% and 36% of the cumulative vertical turbulent event sediment flux, respectively. Although the contribution of outward interactions to the vertical turbulent event sediment flux was low (11%), single outward interaction events were capable of inducing similar SSC' as sweep events. The results suggest that on time scales of tens of minutes to hours, TKE may be appropriate to quantify turbulence in sediment transport studies, but that event characteristics, particular the upward turbulent flux need to be accounted for when considering sediment transport on process time scales.