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s/cdom/CDM/gi

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WMS SL GDI Oberflächenmodelle - DOM1 (2025)

Oberflächenmodelle Saarland:Ein DOM ist ein Digitales Höhenmodell, das im freien Gelände dem DGM entspricht, also die natürliche Geländeoberfläche abbildet, ansonsten aber über die Oberflächen der Gebäude und der beständigen Vegetation verläuft. Datengrundlage sind die durch Laserscanning gewonnen dreidimensionalen Messpunkte. DOM bilden die Situation zum Zeitpunkt der Erfassung ab. Bedingt durch unterschiedliche Erfassungszeitpunkte können z.B. bei Vegetations- und Wasserflächen Höhensprünge auftreten. Hohe schmale Objekte wie bspw. Windräder und Strommasten können nur bedingt abgebildet werden.

Colored dissolved organic matter (CDOM) absorption coefficients in the sea-surface microlayer and the underlying water during a mesocosm phytoplankton bloom in 2023

The effects of a phytoplankton bloom and photobleaching on colored dissolved organic matter (CDOM) in the sea-surface microlayer (SML) and the underlying water (ULW) were studied in a month-long mesocosm study, in May and June of 2023, at the Institute for Chemistry and Biology of the Marine Environment (ICBM) in Wilhelmshaven, Germany. The mesocosm study was conducted by the DFG research group BASS (Biogeochemical processes and Air–sea exchange in the Sea-Surface microlayer, Bibi et al., 2025) in the Sea Surface Facility (SURF) of the ICBM. The facility contains an 8 m × 1.5 m × 0.8 m large outdoor basin with a retractable roof, which was closed at night and during rain events. The basin was filled with North Sea water from the adjacent Jade Bay. Homogeneity of the ULW in the basin was achieved by constant mixing of the water column. The daily SML and ULW samples were collected alternating in the morning, about 1 h after sunrise, and in the afternoon, about 10 h after sunrise. The alternation of sampling times intended to capture a potential effect of sun-exposure duration on DOM transformations and elucidated the day and night variability of the layers. The SML was collected via glass plate sampling (Cunliffe and Wurl, 2014). The ULW was sampled via a submerged tube and a connected syringe suction system in 0.4 m depth. The removed sample volume was refilled with Jade Bay water every day. SML and ULW samples were filtered through pre-flushed 0.7 µm Whatman GF/F and 0.2 nucleopore filters into brown bottles and were stored dark and at 4 °C until measurement within weeks of the study. The brown bottles were previously combusted at 500 °C. CDOM was measured with three liquid waveguide capillary cells (LWCC, WPI, USA) of different pathlengths (10 cm, 50 cm, 250 cm) to increase the measurement sensitivity following the protocols of Röttgers et al. (2024) using a spectral detector (Avantes, Netherlands) for a total spectral range from 230 to 750 nm. A sodium chloride (NaCl) solution was used for the salinity correction. The blank-corrected absorbance spectra were then converted into Napierian absorption coefficients (Bricaud et al., 1981).

WMS SL GDI Oberflächenmodelle - DOM Shaded Relief (2016)

Oberflächenmodelle Saarland:Ein DOM ist ein Digitales Höhenmodell, das im freien Gelände dem DGM entspricht, also die natürliche Geländeoberfläche abbildet, ansonsten aber über die Oberflächen der Gebäude und der beständigen Vegetation verläuft. Datengrundlage sind die durch Laserscanning gewonnen dreidimensionalen Messpunkte. DOM bilden die Situation zum Zeitpunkt der Erfassung ab. Bedingt durch unterschiedliche Erfassungszeitpunkte können z.B. bei Vegetations- und Wasserflächen Höhensprünge auftreten. Hohe schmale Objekte wie bspw. Windräder und Strommasten können nur bedingt abgebildet werden.

Digital surface model of the watercourses Elbe and Lower Havel (Germany), DGM-W Elbe project, DOM Elbe 2022

The high-resolution digital surface model (DSM1, DOM1) of the watercourses Elbe and Lower Havel is based on the airborne laser scanning data, undertaken from 06 January 2022 to 18 March 2022 in the Elbe area and from 20 to 22 December 2021 in the Havel area. It was produced and published by Germany’s Federal Institute of Hydrology (BfG), on behalf of the River Basin Community Elbe (RBC Elbe, FGG Elbe). The work was supported by the German Federal Waterways and Shipping Administration (WSV) and the surveying offices and water management administrations of six German states - Saxony, Saxony-Anhalt, Brandenburg, Lower Saxony, Mecklenburg-Vorpommern and Schleswig-Holstein. The data cover both the area around the inland water stretches of the Elbe from the Czech-German border to the village of Zollenspieker (part of the city of Hamburg) and the Lower Havel waterway from the town of Rathenow to its confluence with the Elbe. Since the dataset has a large coverage of 4,043 km², it is split into 62 sections. They were either labelled *HW in case of flood relevant areas (in German: “hochwasser-relevante Gebiete”) or *AU in case of historical floodplains (in German: “Altauengebiete”). Financing was divided according to these categories: In the HW areas, the project was co-funded by BfG, the WSV and the federal states, while in the AU areas, BfG covered all project costs. For each section we provide hillshade (*HS) and height maps (*NHN). The data are available in a raster resolution of 1 meter in GeoTiff format; Coordinate reference frame: ETRS89.DREF91.R16; Coordinate projection: UTM Zone 33N; EPSG-Code: 25833; Height reference system: DHHN2016, national vertical reference frame in Germany (2022). For further information please contact us. Citation short: BfG et al. / i.A. FGG Elbe (2025)

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 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.

Environmental parameters, including dissolved organic carbon and molecular indices derived from ultra-high-resolution mass spectrometry (FT-ICR-MS) and infrared spectroscopy (ATR-FTIR)

We studied dissolved organic matter (DOM) dynamics in the sea surface microlayer (SML) during a multidisciplinary mesocosm study at the Sea sURface Facility (SURF) of the Institute for Chemistry and Biology of the Marine Environment (ICBM) in Wilhelmshaven, Germany (53.5148 °N, 8.1463 °E). The study was conducted from 18 May to 16 June 2023 as part of the BASS research unit (Biogeochemical processes and Air-sea exchange in the Sea-Surface microlayer). This dataset contains environmental data, including dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and DOM molecular indices (MLBwL, Ibio, Iphoto, IDEG) calculated from ultrahigh-resolution mass spectrometry data (Fourier-transform ion cyclotron resonance mass spectrometer, FT-ICR-MS). Furthermore, we present attenuated total reflectance Fourier Transform Infrared (ATR-FTIR) data from representative samples for each bloom phase. General metadata from the multidisciplinary mesocosm study, including temperature, salinity and chlorophyll a, are provided in Bibi et al. on PANGAEA at the following link: doi:10.1594/PANGAEA.984101.

Dissolved organic matter composition in the sea surface microlayer during a Mesocosm study in Wilhelmshaven, Germany (FT-ICR-MS and ATR-FTIR), spring 2023

We studied dissolved organic matter (DOM) dynamics in the sea surface microlayer (SML) during a mesocosm study at the Sea sURface Facility (SURF) of the Institute for Chemistry and Biology of the Marine Environment (ICBM) in Wilhelmshaven, Germany (53.5148 °N, 8.1463 °E). The study was conducted from 18 May to 16 June 2023 as part of the multidisciplinary BASS research unit (Biogeochemical processes and Air-sea exchange in the Sea-Surface microlayer). SURF was filled with pretreated natural seawater from the nearby Jade Bay (53° 28' 42'' N, 8° 12' 15'' E) to replicate natural conditions. We selected this approach to examine the regrowth of surviving phytoplankton cells after the initial water treatments, simulating a native microbial community starting with almost no bioproduction or pre-existing bioproduction products. To induce and maintain the phytoplankton bloom, inorganic nitrogen, phosphorus, and silicate were added on May 26, May 31, and June 01, 2023. By that, we induced an algal bloom of Emiliania huxleyi and Cylindrotheca closterium. Water samples were collected using a glass plate for the SML and a tube at 40 cm depth for the underlying water (ULW). This dataset contains DOM molecular data from ultrahigh-resolution mass spectrometry (Fourier-transform ion cyclotron resonance mass spectrometer, FT-ICR-MS), molecular indices calculated from FT-ICR-MS data (Ibio, Iphoto, IDEG) and environmental data, including dissolved organic carbon (DOC) and dissolved organic nitrogen (DON). Furthermore, it contains attenuated total reflectance Fourier Transform Infrared (ATR-FTIR) data from representative samples for each bloom phase. By combining molecular analyses with nutrient and bloom-phase data, we highlight the in situ production of carbohydrate-like and laminarin-derived DOM as a significant contributor to SML composition. General metadata from the multidisciplinary mesocosm study, including temperature, salinity and chlorophyll a, are provided in Bibi et al. on PANGAEA at the following link: doi:10.1594/PANGAEA.984101.

WMS SL GDI Oberflächenmodelle - DOM1 (2016)

Oberflächenmodelle Saarland:Ein DOM ist ein Digitales Höhenmodell, das im freien Gelände dem DGM entspricht, also die natürliche Geländeoberfläche abbildet, ansonsten aber über die Oberflächen der Gebäude und der beständigen Vegetation verläuft. Datengrundlage sind die durch Laserscanning gewonnen dreidimensionalen Messpunkte. DOM bilden die Situation zum Zeitpunkt der Erfassung ab. Bedingt durch unterschiedliche Erfassungszeitpunkte können z.B. bei Vegetations- und Wasserflächen Höhensprünge auftreten. Hohe schmale Objekte wie bspw. Windräder und Strommasten können nur bedingt abgebildet werden.

WMS SL GDI Oberflächenmodelle - DOM Shaded Relief (2025)

Oberflächenmodelle Saarland:Ein DOM ist ein Digitales Höhenmodell, das im freien Gelände dem DGM entspricht, also die natürliche Geländeoberfläche abbildet, ansonsten aber über die Oberflächen der Gebäude und der beständigen Vegetation verläuft. Datengrundlage sind die durch Laserscanning gewonnen dreidimensionalen Messpunkte. DOM bilden die Situation zum Zeitpunkt der Erfassung ab. Bedingt durch unterschiedliche Erfassungszeitpunkte können z.B. bei Vegetations- und Wasserflächen Höhensprünge auftreten. Hohe schmale Objekte wie bspw. Windräder und Strommasten können nur bedingt abgebildet werden.

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