1. Wochenbericht M97

Meteor Reise 97: Sauerstoffzufuhr-Tracer-Ausbringungsexperiment SFB754 1. Wochenbericht der Meteorreise M97 Mindelo (Kapverden) – Fortaleza (Brasilien), 25 Mai – 28 Juni 201

4. Wochenbericht M97

Meteor Reise 97: Sauerstoffzufuhr-Tracer-Ausbringungsexperiment SFB754 4. Wochenbericht der Meteorreise M97 Mindelo (Kapverden) – Fortaleza (Brasilien), 25 Mai – 28 Juni 201

2. Wochenbericht M97

Meteor Reise 97: Sauerstoffzufuhr-Tracer-Ausbringungsexperiment SFB754 2. Wochenbericht der Meteorreise M97 Mindelo (Kapverden) – Fortaleza (Brasilien), 25 Mai – 28 Juni 201

CARINA: nutrient data in the Atlantic Ocean

Data on carbon and carbon-relevant hydrographic and hydrochemical parameters from previously non-publicly available cruise data sets in the Arctic, Atlantic and Southern Ocean have been retrieved and merged to a new database: CARINA (CARbon IN the Atlantic). These data have gone through rigorous quality control (QC) procedures to assure the highest possible quality and consistency. The data for most of the measured parameters in the CARINA data base were objectively examined in order to quantify systematic differences in the reported values, i.e. secondary quality control. Systematic biases found in the data have been corrected in the data products, i.e. three merged data files with measured, calculated and interpolated data for each of the three CARINA regions; Arctic Mediterranean Seas, Atlantic and Southern Ocean. Out of a total of 188 cruise entries in the CARINA database, 98 were conducted in the Atlantic Ocean and of these 84 cruises report nitrate values, 79 silicate, and 78 phosphate. Here we present details of the secondary QC for nutrients for the Atlantic Ocean part of CARINA. Procedures of quality control, including crossover analysis between cruises and inversion analysis of all crossover data are briefly described. Adjustments were applied to the nutrient values for 43 of the cruises in the Atlantic Ocean region. With these adjustments the CARINA database is consistent both internally as well as with GLODAP data, an oceanographic data set based on the World Hydrographic Program in the 1990s (Key et al., 2004). Based on our analysis we estimate the internal accuracy of the CARINA-ATL nutrient data to be: nitrate 1.5%; phosphate 2.6%; silicate 3.1%. The CARINA data are now suitable for accurate assessments of, for example, oceanic carbon inventories and uptake rates and for model validation

A dual catalytic strategy for carbon-phosphorus cross-coupling via gold and photoredox catalysis.

A new method for the P-arylation of aryldiazonium salts with H-phosphonates via dual gold and photoredox catalysis is described. The reaction proceeds smoothly at room temperature in the absence of base and/or additives, and offers an efficient approach to arylphosphonates. The reaction is proposed to proceed through a photoredox-promoted generation of an electrophilic arylgold(III) intermediate that undergoes coupling with the H-phosphonate nucleophile