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South China and Eastern Archipelagic Seas

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  • This dataset contains nifH gene copy numbers, growth rates, and grazing mortality rates of the major unicellular cyanobacterial diazotroph taxa (UCYN-A1, -A2/3/4, -B and -C), and growth rates and grazing mortality rates of total phytoplankton community (inferred by chlorophyll a) in the South China Sea and the Luzon Strait. The associated physicochemical factors including temperature, salinity, nitrate+nitrite, ammonium, phosphate, and chlorophyll a are also available in this dataset. All these data were collected during a research cruise (Cruise No. kk1801) aboard the R/V Tan Kah Kee in early February 2018. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.

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    This visualization product displays the density of floating micro-litter per net normalized per km² per year from specific protocols different from research and monitoring protocols. EMODnet Chemistry included the collection of marine litter in its 3rd phase. Before 2021, there was no coordinated effort at the regional or European scale for micro-litter. Given this situation, EMODnet Chemistry proposed to adopt the data gathering and data management approach as generally applied for marine data, i.e., populating metadata and data in the CDI Data Discovery and Access service using dedicated SeaDataNet data transport formats. EMODnet Chemistry is currently the official EU collector of micro-litter data from Marine Strategy Framework Directive (MSFD) National Monitoring activities (descriptor 10). A series of specific standard vocabularies or standard terms related to micro-litter have been added to SeaDataNet NVS (NERC Vocabulary Server) Common Vocabularies to describe the micro-litter. European micro-litter data are collected by the National Oceanographic Data Centres (NODCs). Micro-litter map products are generated from NODCs data after a test of the aggregated collection including data and data format checks and data harmonization. A filter is applied to represent only micro-litter sampled according to a very specific protocol such as the Volvo Ocean Race (VOR) or Oceaneye. Densities were calculated for each net using the following calculation: Density (number of particles per km²) = Micro-litter count / (Sampling effort (km) * Net opening (cm) * 0.00001) When the number of microlitters or the net opening was not filled, the density could not be calculated. Percentiles 50, 75, 95 & 99 have been calculated taking into account data for all years. Warning: the absence of data on the map doesn't necessarily mean that they don't exist, but that no information has been entered in the National Oceanographic Data Centre (NODC) for this area.

  • The air-sea flux and surfacw wave were observd in a fixed platform( 21º26.5' N, 111º23.5' E),  during the measurements from 6 February to 8 May 2012, the turbulence observed by the high-frequency ultrasonic anemometer (Gill R3-50) mounted at a height of 8 m, and waves were observed by the An acoustic wave and current (AWAC) sensor (Nortek, Rud, Norway).   The data provided are: Time:  YYYYMMDDHHNN; U8: Wind speed observed from ultrasonic anemometer fixed at 8 m height above the sea surface; Wind direction(from): Wind direction observed from ultrasonic anemometer; Wave direction(from): wave direction from acoustic wave and current (AWAC) sensor; Atmospheric Stability (z/L): Atmospheric Stability z/L, where z is height, and L is Obukhov length; wave age (cp/U8): Peak wave age ; τx/ρ: total wind stress  in longitudinal direction ; τy/ρ: total wind stress in lateral direction; τtx/ρ: turblent wind stress  in longitudinal direction ; τty/ρ: turblent wind stress in lateral direction; Cd(COARE): the drag coefficient computed by COARE 3.0 ; case: It represent the cases shown in figures 6~7 in the main text.Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.