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Taxonomic composition of zooplankton and frequency of occurrence of the taxa (% of samples) in the small river of the industrial zone of Volga region
No full textThe presented species list of zooplankton is a summary of long-term observations that took place on the small river Stepnoy Zai, situated in the industrial zone of the Middle Volga region of Russia. The sampling took place in May, July, and September yearly from 2008 to 2019 from 4 sampling stations along the river Stepnoy Zai. The sampling stations were situated upstream and downstream of municipal wastewater discharges of the four cities located in the upper (Bugulma, Leninogorsk), middle (Almetievsk), and lower (Zainsk) reaches of the river. Sampling was performed using Apstein Net from the upper water horizons. Samples were concentrated to 100 ml, and fixed with 4% formaldehyde solution
Trace metal distribution for water samples of the cruise AT010
No full textOffshore wind energy is a steadily growing sector contributing to the worldwide energy production. The impact of these offshore constructions on the marine environment, however, remains unclear in many aspects. In fact, little is known about potential emissions from corrosion protection systems such as organic coatings or galvanic anodes composed of Al and Zn alloys, used to protect offshore structures. In order to assess potential chemical emissions from offshore wind farms and their impact on the marine environment water and sediment samples were taken in and around offshore wind farms of the German Bight between 04.04.2022 and 14.04.2022 within the context of the Hereon-BSH project OffChEm II. The water samples were taken in metal-free GO-FLO sampling bottles, filtered over <0.45 µm polycarbonate filters into pre-cleaned LDPE bottles and acidified with nitric acid. The filtrates were then measured for their (trace) metal concentrations with ICP-MS/MS coupled online to a seaFAST preconcentration and matrix removal system
Processed physical properties measured on sediment core GeoB19927-3
No full textSound knowledge about the petrophysical characteristics of a sediment core is a prerequisite for any subsequent paleoenvironmental study relying on sediment proxies. Physical properties of whole-round sediment cores are acquired as a first step of sediment core description, prior to slicing of sediment cores into two halves. Here, we present processed physical-properties data of core GeoB19927-3 acquired with a Geotek MSCL-S system on the unsplit core, retrieved during RV Maria S. Merian expedition MSM44 to West Greenland/Baffin Bay in summer 2015. Cores were processed according to the standard protocol given by the manufacturer Geotek Ltd
Processed physical properties measured on sediment core GeoB19933-1
No full textSound knowledge about the petrophysical characteristics of a sediment core is a prerequisite for any subsequent paleoenvironmental study relying on sediment proxies. Physical properties of whole-round sediment cores are acquired as a first step of sediment core description, prior to slicing of sediment cores into two halves. Here, we present processed physical-properties data of core GeoB19933-1 acquired with a Geotek MSCL-S system on the unsplit core, retrieved during RV Maria S. Merian expedition MSM44 to West Greenland/Baffin Bay in summer 2015. Cores were processed according to the standard protocol given by the manufacturer Geotek Ltd
Air temperature at a height of 2 m in Kozia Dolina Valley (Tatra Mts.)
No full textThe climate of a high-altitude postglacial cirque, such as Kozia Dolinka, is conducive to the occurrence of permafrost. Both the depth of permafrost and the area it covers, as well as the presence of year-round snow patches, can serve as indicators for assessing the impact of global warming on the climate of mountains, including the Tatras. With few meteorological stations to survey the remote and inaccessible high-altitude areas of the Tatra Mountains, any research must rely on measurements spanning limited time periods. Against this background, the 5-year series of temperature measurements from the Kozia Dolinka cirque obtained by the Institute of Geography and Spatial Organization of the Polish Academy of Sciences (IGiPZ PAN) can be used to analyze air temperature patterns on concave and convex terrain forms in the alpine climate zone if compared to the results of measurements from stations of the State Hydrological and Meteorological Service located nearby, i.e. the Kasprowy Wierch High Mountain Meteorological Observatory and the Hala Gąsienicowa Nival Research Station of the Institute of Meteorology and Water Management, National Research Institute (IMGW-PIB). This study confirms that there is a relationship between air temperature and the formation and duration of snow cover on concave and convex terrain forms. It also reveals a hitherto unknown fact that concave terrain forms, i.e. postglacial cirques, of the alpine zone have milder thermal conditions in winter than convex terrain forms. The analyses highlight the need for further, more detailed research using modern automated meteorological stations
Clumped isotopic composition of oxygen in WDC06A ice core 8-18ka
No full textLaboratory O2 clumped-isotopic composition data (as Δ36 values) for air occluded in ice core spanning gas ages of 8000-18000 ky BP. O2 clumped isotopic composition data was generated between 2017-2022 at Rice University, Houston, TX, using a Nu Perspective Isotope Ratio Mass Spectrometer (IRMS). Reported data was measured in an Antarctic ice core: West Antarctic Ice Sheet Divide Ice Core (WDC06A) . The chronology and gas ages for the core were obtained from Sigl et al., 2016 (doi:10.5194/cp-12-769-2016) and Buizert et al., 2015 (doi:10.5194/cp-11-153-2015).
In addition to O2 clumped isotope data, measured δ18Ο data are also reported. Gas loss corrections to generated Δ36 data are made using previously reported raw δ18O data in Seltzer et al., 2017 (doi:10.5194/cp-13-1323-2017) and established gas loss corrections in Yeung et al., 2012 and Banerjee et al. 2022
Master track of SONNE cruise SO307 in 1 sec resolution (zipped, 170 MB)
No full textRaw data acquired by position sensors on board RV SONNE during expedition SO307 were processed to receive a validated master track which can be used as reference of further expedition data. During SO307 the motion reference unit Kongsberg SeaTex AS MRU-5 combined with Kongsberg SeaTex AS Seapath 320 and two GPS receivers SAAB MGL-4 were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.bsh.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track
Second-year sea-ice salinity, temperature, density, nutrient, oxygen and hydrogen isotope composition from the main coring site (MCS-SYI) during MOSAiC legs 1 to 4 in 2019/2020, version 2
No full textSecond-year sea-ice thickness, draft, salinity, temperature, nutrient concentrations ([NO3]- + [NO2]-; [NO2]-, [NH4]+, [PO4]-, Si(OH)4), stable water isotope composition and density were measured during near-weekly surveys at the main second-year ice coring site (MCS-SYI) during the MOSAiC expedition (legs 1 to 3) and new second-year ice coring site leg 4, since the earlier site was not accessible any longer. The ice cores were extracted either with a 9-cm (Mark II) or 7.25-cm (Mark III) internal diameter ice corers (Kovacs Enterprise, US). This data set includes data from 18 coring site visits and were performed from 28 October 2019 to 20 July 2020 at coring locations within 50 m to each other in the MOSAiC Central Observatory. During each coring event, ice temperature was measured in situ from a separate temperature core, using Testo 720 thermometers in drill holes with a length of half-core-diameter at 5-cm vertical resolution. Ice bulk practical salinity was measured using a YSI 30 conductivity meter. Nutrient analyses were conducted shipboard or samples were frozen and analyzed at a shore-based lab. In either case, analyses were conducted colorimetrically using a Seal Analytical AA3 continuous flow auto analyzer (AACE Software, Version 7.09). Measurement of nutrients followed best practices adopted from GO-SHIP recommendations (Hydes et al., 2010; Becker et al., 2020). Ice density was measured using the hydrostatic weighing method (Pustogvar and Kulyakhtin, 2016) from a density core in the freezer laboratory onboard Polarstern at the temperature of –15°C. Relative volumes of brine and gas were estimated from ice salinity, temperature and density using Cox and Weeks (1983) for cold ice and Leppäranta and Manninen (1988) for ice warmer than –2°C.
The data contains the event label (1), date/time (2), and global coordinates (3,4) of each coring activity. Each salinity/isotope/nutrient core has its manually measured ice thickness (5), ice draft (6), core length (7), and mean snow height (19). Each core section has the total length of its top (8) and bottom (9) measured in situ, as well as the estimated depth of section top (10), bottom (11), and middle (12). The depth estimates assume that the total length of all core sections is equal to the measured ice thickness. Each core section has the value of its practical salinity (13), in situ temperature (14), ice density at the laboratory (15) and in situ (16) temperature, brine volume fraction (17), gas volume fraction (18), nitrate + nitrite (plus error and quality flag; 20, 21, 22), nitrite (23, 24, 25), ammonium (26, 27, 28), phosphate (29, 30, 31), silicate (32, 33, 34), stable water isotopic sample ID and values (35, 36, 37, 38) (Meyer et al., 2000). Temperature, density, and gas volume fraction values were interpolated to the depth of salinity/isotope/nutrient measurements. The global coordinates of coring sites were measured directly. When it was not possible, coordinates of the nearby temperature buoy 2019T62 (legs 1-3) or 2019T61 (leg 4) were used. Ice mass balance buoy 2019T62 installation is described in doi:10.1594/PANGAEA.940231, ice mass balance buoy 2020T61 installation is described in doi:10.1594/PANGAEA.926580. Sea-ice density at in situ temperatures (16) and brine volume (17) fraction estimates are presented only for brine volume fraction values from 0 to 30%. Ice temperatures were assumed to be not higher than -0.1°C. Estimates of sea-ice density at in situ temperature and gas volume fraction are made using measurements of density and salinity of a separate density core and are not shown if any of these measurements were not performed. Measurements of snow height include the thickness of the surface scattering layer. Each core section also has comments (39) describing if the sample is from a new coring site or has any other special characteristics
Raw CTD data from RV MARIA S. MERIAN cruise MSM119, Reykjanes Ridge
No full textPhysical oceanography data was acquired by a ship-based Seabird SBE911+ CTD-Rosette system onboard Maria S. Merian during research cruise MSM119. The CTD system is comprised of a Seabird SBE911Plus including dual respectively redundant sensor and pump packages. The SBE11plus Deck Unit remains on board in a laboratory and supplies on one hand power to the SBE9plus underwater unit, on the other hand data telemetry between the SBE9plus and a measurement PC. The SBE9plus underwater unit itself holds a pressure sensor and is interfacing with dual SEB3 temperature, SBE4 conductivity and SBE43 oxygen sensors and two SBE5 pumps to provide a pumped water supply past each sensor. The system also carries an optical FLNTU sensor to measure a combinations of back-scattering, turbidity, and chlorophyll-a. To quantify the photo-synthetically active radiation a PAR sensor is installed as well