<?xml version="1.0" encoding="UTF-8"?><!--*** Generated from internal PANGAEA metadata schema by dif.xslt ***--><DIF xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.4.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/">
<Entry_ID>PANGAEA_993580</Entry_ID>
<Entry_Title>Biochemical composition and phytoplankton community of the sea surface microlayer and underlying water during  ELISABETH MANN BORGESE cruise EMB295 (CenBASE) Jul-Aug 2022</Entry_Title>
<Data_Set_Citation>
<Dataset_Creator>Karnatz, Josefine; Barthelmeß, Theresa; Sabbaghzadeh, Bita; Engel, Anja</Dataset_Creator>
<Dataset_Title>Biochemical composition and phytoplankton community of the sea surface microlayer and underlying water during  ELISABETH MANN BORGESE cruise EMB295 (CenBASE) Jul-Aug 2022</Dataset_Title>
<Dataset_Release_Date>2026-04-17</Dataset_Release_Date>
<Dataset_Publisher>PANGAEA</Dataset_Publisher>
<Data_Presentation_Form>Dataset</Data_Presentation_Form>
<Online_Resource>https://doi.pangaea.de/10.1594/PANGAEA.993580</Online_Resource>
</Data_Set_Citation>
<Personnel>
<Role>Investigator</Role>
<First_Name>Josefine</First_Name>
<Last_Name>Karnatz</Last_Name>
<Email>jkarnatz@geomar.de</Email>
</Personnel>
<Discipline>
<Discipline_Name>Earth Science</Discipline_Name>
</Discipline>
<Parameters>
<Detailed_Variable>Event label</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Date/Time of event</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LATITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LONGITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Classification</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Sampling</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Depth zone</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Chlorophyll a</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Chlorophyll a, standard deviation</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Picoplankton</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Nanoplankton</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Phytoplankton, total</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Aspartic acid and Asparagine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Glutamine and Glutamic acid</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Serine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Glycine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Threonine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Arginine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Alanine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>gamma-Aminobutyric acid</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Tyrosine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Valine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Isoleucine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Phenylalanine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Leucine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Amino acid, total</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Fucose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Rhamnose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Galactosamine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Arabinose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Glucosamine</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Galactose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Glucose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Mannose/Xylose</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Galacturonic acid</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Glucuronic acid</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Carbohydrates, total combined</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Surfactants</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Carbon, organic, total</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Carbon, organic, total, standard deviation</Detailed_Variable>
</Parameters>
<ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
<Keyword>air-sea interface</Keyword>
<Keyword>amino acids</Keyword>
<Keyword>Aphanizomenon sp.</Keyword>
<Keyword>Baltic Sea</Keyword>
<Keyword>carbohydrates</Keyword>
<Keyword>CTD/Rosette</Keyword>
<Keyword>Cyanobacteria</Keyword>
<Keyword>EMB295</Keyword>
<Keyword>EMB295_12-11</Keyword>
<Keyword>EMB295_12-16</Keyword>
<Keyword>EMB295_12-24</Keyword>
<Keyword>EMB295_12-27</Keyword>
<Keyword>EMB295_12-3</Keyword>
<Keyword>EMB295_12-7</Keyword>
<Keyword>EMB295_13-3</Keyword>
<Keyword>EMB295_14-1</Keyword>
<Keyword>EMB295_15-4</Keyword>
<Keyword>EMB295_17-2</Keyword>
<Keyword>EMB295_18-2</Keyword>
<Keyword>EMB295_21-2</Keyword>
<Keyword>EMB295_22-2</Keyword>
<Keyword>EMB295_22-4</Keyword>
<Keyword>EMB295_22-7</Keyword>
<Keyword>Nodularia spumigena</Keyword>
<Keyword>Phytoplankton bloom</Keyword>
<Keyword>sea surface microlayer</Keyword>
<Keyword>Surfactants</Keyword>
<Keyword>synechococcus</Keyword>
<Sensor_Name>
<Long_Name>CTD</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>Fluorometer, Turner Designs, 10-AU</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>Flow cytometry</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>High Performance Liquid Chromatography (HPLC)</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>High Performance anion-exchange chromatography</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>Voltammetry, Metrohm, 796 VA Computrace</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>TOC analyzer (Shimadzu)</Long_Name>
</Sensor_Name>
<Source_Name>
<Long_Name>Elisabeth Mann Borgese</Long_Name>
</Source_Name>
<Temporal_Coverage>
<Start_Date>2022-07-06</Start_Date>
<Stop_Date>2022-07-16</Stop_Date>
</Temporal_Coverage>
<Data_Set_Progress>Complete</Data_Set_Progress>
<Spatial_Coverage>
<Southernmost_Latitude>57.191428</Southernmost_Latitude>
<Northernmost_Latitude>57.450808</Northernmost_Latitude>
<Westernmost_Longitude>19.251424</Westernmost_Longitude>
<Easternmost_Longitude>20.176119</Easternmost_Longitude>
</Spatial_Coverage>
<Project>
<Short_Name>BASS</Short_Name>
<Long_Name>Biogeochemical processes and Air-sea exchange in the Sea-Surface microlayer</Long_Name>
</Project>
<Access_Constraints>access rights needed</Access_Constraints>
<Use_Constraints>CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends)</Use_Constraints>
<Data_Set_Language>English</Data_Set_Language>
<Data_Center>
<Data_Center_Name>
<Short_Name>PANGAEA</Short_Name>
<Long_Name>Data Publisher for Earth &amp; Environmental Science</Long_Name>
</Data_Center_Name>
<Data_Center_URL>https://www.pangaea.de/</Data_Center_URL>
<Personnel>
<Role>Data Center Contact</Role>
<First_Name>Michael</First_Name>
<Last_Name>Diepenbroek</Last_Name>
<Email>info@pangaea.de</Email>
<Contact_Address>
<Address>Leobener Str.</Address>
<City>Bremen</City>
<Province_or_State>Bremen</Province_or_State>
<Postal_Code>28359</Postal_Code>
<Country>Germany</Country>
</Contact_Address>
</Personnel>
</Data_Center>
<Distribution>
<Distribution_Media>online</Distribution_Media>
<Distribution_Size>1188 data points</Distribution_Size>
<Distribution_Format>text/tab-separated-values</Distribution_Format>
</Distribution>
<Reference>Karnatz, Josefine (in review): Biochemial Characteristics of the Sea Surface Microlayer in the Central Baltic Sea and Potential Signatures of Cyanobacterial Blooms.</Reference>
<Summary>This dataset comprises samples collected in the Eastern Gotland Basin (Central Baltic Sea) during the EMB295 CenBASE research cruise conducted from June 30th to July 19th 2022. Sea surface microlayer (SML) samples were collected using established methods, i.e. the glass plate and the Garrett screen. Reference samples from the underlying water (ULW) were collected at approximately 1 m depth using a manually deployed Niskin bottle. To characterize the biochemical composition of the SML and the ULW, water samples were collected twice daily for the analysis of total organic carbon (TOC), total amino acids (TAA), total combined carbohydrates (TCCHO), and surfactants (determined using phase-sensitive AC voltammetry). TOC was measured using a TOC analyser. High-performance anion-exchange chromatography coupled to pulsed amperometric detection (HPAEC-PAD) was performed for carbohydrate analysis. Amino acids were determined using a high-performance liquid chromatography (HPLC). Chlorophyll a samples were taken from the Niskin bottles at 1m depth (ULW) and analysed using a fluorometer from Turner Designs (Turner TD 10-AU005). Abundance and community composition of nano- and picophytoplankton (&lt;=20µm) were determined by flow cytometry. Sampling stations were subsequently classified based on the abundance of microphytoplankton (&gt;20 µm) and nano/picophytoplankton (≤20 µm). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993580"!</Summary>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LATITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LONGITUDE</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/Alanine</URL>
<Description>Alanine</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/Arginine</URL>
<Description>Arginine</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/Flow_cytometry</URL>
<Description>Flow cytometry</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/Glycine</URL>
<Description>Glycine</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/High-performance_liquid_chromatography</URL>
<Description>High Performance Liquid Chromatography (HPLC)</Description>
</Related_URL>
<Related_URL>
<URL>https://en.wikipedia.org/wiki/Serine</URL>
<Description>Serine</Description>
</Related_URL>
<Related_URL>
<URL>https://hdl.handle.net/10013/epic.32187.d001</URL>
<Description>Chlorophyll a</Description>
</Related_URL>
<Related_URL>
<URL>https://uol.de/en/bass</URL>
<Description>BASS</Description>
</Related_URL>
<Related_URL>
<URL>https://www.iow.de/fs-elisabeth-mann-borgese.html</URL>
<Description>Elisabeth Mann Borgese</Description>
</Related_URL>
<Parent_DIF>PANGAEA_993574</Parent_DIF>
<Metadata_Name>DIF</Metadata_Name>
<Metadata_Version>9.4</Metadata_Version>
<DIF_Creation_Date>2026-04-17</DIF_Creation_Date>
<Last_DIF_Revision_Date>2026-04-29</Last_DIF_Revision_Date>
</DIF>
