API src

Found 14 results.

Other language confidence: 0.8955250576412106

Ferrybox underway observations of physical and optical surface water variables during HE614 from 2023-02-27 to 2023-03-25

The data presented here were collected during the cruise HE614 with RV Heincke from Bremerhaven to Bremerhaven (2023-02-27 to 2023-03-25). The water intake of the autonomous measurement system was in approx. 3 m depth. All data have been subjected to automated quality checks (see processing report) and visual control. The chlorophyll-a data were additionally calibrated by comparison with discrete samples. Details on all quality control steps and the calibration can be found in the data processing report. The resulting data set contains the quality-controlled data and corresponding quality flags. The data set contains data during transect and station. The rawdata are also available on request from the principal investigator.

Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO285

Underway optical chlorophyll-a and turbidity data were collected along the cruise track with Sea-Bird Scientific ECO FLNTU sensors installed within two autonomous measurement systems, called self-cleaning monitoring boxes (SMBs). The SMBs measure alternatingly. While one box is measuring, the other one is being cleaned. The water inlet for the SMBs is at about 4 m below sea surface. Observed chlorophyll-a and turbidity data were both quality controlled and the chlorophyll-a data was additionally calibrated using chlorophyll-a reference data from discrete water samples taken from the CTD water sampler at 10 m depth. Sample chlorophyll-a was determined spectrophotometrically following Jeffrey and Humphrey (1975) as in EPA Method 446. Note that the ship crossed various biogeochemical provinces leading to high variability in the data and, additionally, non-photochemical quenching effects can be observed making it difficult to robustly calibrate the data. A comparison of the calibrated chlorophyll-a with satellite data using the GlobColour CHL1 and CHL2 products is additionally provided. Details on all quality control steps, the calibration, and the comparison with satellite data can be found in the data processing report. The resulting data set contains the original data, the calibrated data (in case of chlorophyll-a) and corresponding quality flags achieved by the quality control algorithm. The data source is given through the name of the active SMB. The data set contains data during transit time and station work. We recommend to use ship's speed to filter for only transit data.

Ferrybox underway observations of physical and optical surface water variables during HE609 from 2022-10-04 to 2022-10-28

The data presented here were collected during the cruise HE609 with RV Heincke from Bremerhaven to Bremerhaven (2022-10-04 to 2022-10-28). The water intake of the autonomous measurement system was in approx. 3 m depth. All data have been subjected to automated quality checks (see processing report) and visual control. The chlorophyll-a data were additionally calibrated by comparison with discrete samples. Details on all quality control steps and the calibration can be found in the data processing report. The resulting data set contains the quality-controlled data and corresponding quality flags. The data set contains data during transect and station. The rawdata are also available on request from the principal investigator.

Ferrybox underway observations of physical and optical surface water variables during HE626 from 2023-07-20 to 2023-08-09

The data presented here were collected during the cruise HE626 with RV Heincke from Bremerhaven to Bremerhaven (2023-07-20 to 2023-08-09). The water intake of the autonomous measurement system was in approx. 3 m depth. All data have been subjected to automated quality checks (see processing report) and visual control. The chlorophyll-a data were additionally calibrated by comparison with discrete samples. Details on all quality control steps and the calibration can be found in the data processing report. The resulting data set contains the quality-controlled data and corresponding quality flags. The data set contains data during transect and station. The rawdata are also available on request from the principal investigator.

Ferrybox underway observations of physical and optical surface water variables during HE598 from 2022-04-29 to 2022-05-24

The data presented here were collected during the cruise HE598 with RV Heincke from Bremerhaven to Bremerhaven (2022-04-29 to 2022-05-24). The water intake of the autonomous measurement system was in approx. 3 m depth. All data have been subjected to automated quality checks (see processing report) and visual control. The chlorophyll-a data were additionally calibrated by comparison with discrete samples. Details on all quality control steps and the calibration can be found in the data processing report. The resulting data set contains the quality-controlled data and corresponding quality flags. The data set contains data during transect and station. The rawdata are also available on request from the principal investigator.

Ferrybox underway observations of physical and optical surface water variables during HE626/2 from 2023-10-27 to 2023-11-07

The data presented here were collected during the cruise HE626-2 with RV Heincke from Bremerhaven to Bremerhaven (2023-10-27 to 2023-11-07). The water intake of the autonomous measurement system was in approx. 3 m depth. All data have been subjected to automated quality checks (see processing report) and visual control. The chlorophyll-a data were additionally calibrated by comparison with discrete samples. Details on all quality control steps and the calibration can be found in the data processing report. The resulting data set contains the quality-controlled data and corresponding quality flags. The data set contains data during transect and station. The rawdata are also available on request from the principal investigator.

Dünnschichtsolartechnologien der Zukunft - SOLAMO

Das Projekt SOLAMO hat zum Ziel, die beiden derzeit attraktivsten Dünnschichtsolarzellentypen basierend auf Cu(In,Ga)Se2 (CIGS) und Perowskiten parallel zueinander weiterzuentwickeln, so dass sie eines Tages in einer Tandemstruktur zusammengeführt werden können. CIGS: Die bereits im letzten Berichtszeitraum bestellte CIGS-Vakuumanlage wurde ausgeliefert, aufgebaut und abgenommen. Alle geforderten Spezifikationen (z.B. Basisdruck) konnten eingehalten werden oder waren noch besser als gefordert. Nach der Inbetriebnahme konnten auf Anhieb bereits relativ gute Absorber abgeschieden werden. Bei einer CIGS- Niedertemperaturabscheidung mit einer nominellen Substrattemperatur von 380 Grad Celsius wurden auf Polymerfolie (Polyimid) CIGS-Schichten in einem 3-Stufenprozess abgeschieden, die nach Aufbringen aller anderen Schichten zu Zellwirkungsgraden von bis zu 14,5 % führten. Auf Glassubstrat konnte im Niedertemperatur-CIGS-Prozess (420 Grad Celsius) sogar ein Wirkungsgrad von 17,2 % erreicht werden. Bei höheren Substrattemperaturen (500 Grad Celsius) lag der maximale Wirkungsgrad auf Glas bei 17,7 %. Der Wirkungsgrad ist dabei nicht direkt mit der Substrattemperatur korreliert, sondern entsteht durch eine komplexe Zusammenwirkung von Natrium- bzw. Kaliumdotierung, Interdiffusion der einzelnen Elemente (Cu, In, Ga, Se) und dem über der Schichtdicke eingebauten Gallium-Zusammensetzungsgradienten. In ersten Niedertemperatur-Versuchen bei 400 Grad Celsius auf Polymerfolie wurde zur Erhöhung der Abscheidegeschwindigkeit die Kupfer-Aufdampfrate in der zweiten Beschichtungsstufe erfolgreich verdoppelt, ohne Einbußen beim Zellwirkungsgrad zu erleiden. Perowskite: Perowskitsolarzellen wurden weiterhin im Standard- und invertierten Aufbau in opaker und semitransparenter Konfiguration untersucht. Im Standard-Aufbau konnte durch die Verwendung von PCBM und Al2O3 Nanopartikeln die Beschichtung verbessert und die unerwünschte Hysterese reduziert werden. Im invertierten Aufbau wurden fast hysteresefreie gut reproduzierbare Effizienzen von ca. 15 % erzielt. Um Kosten zu sparen, wurde versucht, den bisher thermisch verdampften Silber- Rückkontakt durch gesputtertes Aluminium zu ersetzen. Unter Verwendung eines Temperschrittes konnten Wirkungsgrade größer 10 % erreicht werden. Für semitransparente Perowskitzellen wurde als semitransparenter Frontkontakt Indium- Zink-Oxid (IZO) sowohl im Standard als auch im invertierten Aufbau getestet. In beiden Architekturen wurden Wirkungsgrade größer 13 % erzielt. Gleichzeitig blieben 70 % Transmission im Wellenlängenbereich größer als 775 nm für die Nutzung im Tandemverbund mit einer möglichen Subzelle aus CIGS oder Silizium erhalten. Erste Glas-zu-Glas Verkapselungstests zeigten, dass auch nach 9 Monaten Lagerung im Dunkeln noch größer als 12 % Wirkungsgrad (frische Probe 14,9 %) erreicht werden können (entspricht einer relativen Degradation von 18 %). (Text gekürzt)

Reference measurements of surface waters during the RV MARIA S. MERIAN cruise MSM97/2

Reference measurements of surface waters were collected during the RV MARIA S Merian cruise MSM97/2 (12.12.2020 - 23.12.2020, Emden, Germany - Emden Germany). Accompanying the underway measurements of the DAM transit cruise water samples were taken from the CTD and the onboard measurement containers (RSWS) for later validation of bio-optical water properties. Turbidity and fluorescent dissolved organic matter (fDOM) were measured directly onboard via handheld instruments (see methods/device) whereas suspended particular matter (SPM) and chlorophyll a (Chl a) were filtered onboard on glas fibre filters (GFF, 47mm, 0,7 µm) and frozen at -25°C and -80°C immediately after sampling. Values were determined in the lab after the cruise within 2 months, for SPM via gravimetric analysis and for Chl a according to EPA Method 445. Water samples for nitrate analysis were taken and frozen at -25°immediately after sampling for later lab analysis according to Grasshoff et al. (1999).

Continuous optical measurements of absorbance via UV-process spectrophotometer OPUS along RV MARIA S. MERIAN cruise MSM97/2

During R/V Maria S. Merian cruise MSM97/2 a sensor box (AddOn Box) was attached to a PocketFerryBox (4H Jena, Germany) in-line obtaining waters from the ships two autonomous measurement systems (RSWS). For the measurement of underway absorption spectra to calculate optical nitrate, the AddOn Box was equipped with two UV-process spectrophotometer (ProPS and OPUS, TriOS Mess- und Datentechnik GmbH, Germany). Data were recorded continuously in a ten-minute interval along the cruise track with an optical path length of 10 mm. The integration time was 256 ms. The ProPS photometer is equipped with a Deuterium lamp as light source whereas the OPUS photometer is equipped with a Xenon flash lamp. Baseline calibrations were done for both UV-photometer using ultrapure water. For the ProPS, the calibration was done in the laboratory before the cruise whereas the calibration for the OPUS was done by the manufacturer. The water inlet of the RSWS is allocated at approx. 6.5 m below the sea surface. While one box is measuring, the other box is being cleaned. The boxes switch after a user-defined measuring and cleaning interval. On MSM97/2, the boxes were alternating every 12 hours, including one short cleaning procedure during measurements after 4 hours. Absorption spectra obtained by the AddOn Box during the alternation process of the two RSWS, as well as during the internal cleaning procedure are not included. Spectra from station work are included. Within this dataset, absorption spectra were cut to a relevant wavelength range (from 189-360 nm (ProPS) and 199-360 nm (OPUS) to 210-260 nm). No further correction was done for the absorbance spectra in this processing step.

Continuous optical measurements of absorbance via UV-process spectrophotometer ProPS along RV MARIA S. MERIAN cruise MSM97/2

During R/V Maria S. Merian cruise MSM97/2 a sensor box (AddOn Box) was attached to a PocketFerryBox (4H Jena, Germany) in-line obtaining waters from the ships two autonomous measurement systems (RSWS). For the measurement of underway absorption spectra to calculate optical nitrate, the AddOn Box was equipped with two UV-process spectrophotometer (ProPS and OPUS, TriOS Mess- und Datentechnik GmbH, Germany). Data were recorded continuously in a ten-minute interval along the cruise track with an optical path length of 10 mm. The integration time was 256 ms. The ProPS photometer is equipped with a Deuterium lamp as light source whereas the OPUS photometer is equipped with a Xenon flash lamp. Baseline calibrations were done for both UV-photometer using ultrapure water. For the ProPS, the calibration was done in the laboratory before the cruise whereas the calibration for the OPUS was done by the manufacturer. The water inlet of the RSWS is allocated at approx. 6.5 m below the sea surface. While one box is measuring, the other box is being cleaned. The boxes switch after a user-defined measuring and cleaning interval. On MSM97/2, the boxes were alternating every 12 hours, including one short cleaning procedure during measurements after 4 hours. Absorption spectra obtained by the AddOn Box during the alternation process of the two RSWS, as well as during the internal cleaning procedure are not included. Spectra from station work are included. Within this dataset, absorption spectra were cut to a relevant wavelength range (from 189-360 nm (ProPS) and 199-360 nm (OPUS) to 210-260 nm). No further correction was done for the absorbance spectra in this processing step.

1 2