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Size-fractionated particulate total mercury and monomethylmercury concentrations in the Southern Ocean during the PS133/1 expedition (22 October – 9 November 2022)
No full textConcentrations of particulate total mercury (Hg) and monomethylmercury (MMHg) were determined in size-fractionated suspended particles collected in the Southern Ocean between 22 October and 9 November 2022 during the PS133/1 expedition. Particles were collected using battery-powered in situ large-volume pumps (McLane Research Laboratories, Inc. and Challenger Oceanic's Stand-Alone Pumping System, SAPS) equipped with 142 mm diameter filter holders (MULVFS style; Bishop et al., 2012). Pumps were deployed at depths ranging from 25 to 350 m. Each filter holder contained two filters for size fractionation: a 51 μm Sefar Petex screen (SEFAR GmbH)—acid-leached prior to the cruise—mounted above a pre-combusted QMA filter (nominal pore size ~2.2 μm), separating particle size classes of 2.2–51 μm and >51 μm. Particulate total mercury was quantified by thermal decomposition, amalgamation, and atomic absorption spectrophotometry (TDA–AAS) using a DMA-EVO Direct Mercury Analyzer (Milestone). MMHg concentrations were determined by gas chromatography–cold vapor atomic fluorescence spectrometry (GC–CVAFS) using a Brooks Rand methylmercury analysis system following acid digestion. Data are reported both as mass-specific concentrations (ng g⁻¹ of suspended particulate matter) and as volume-normalized concentrations (pmol L⁻¹), corrected for the volume of water filtered
Air- and soil temperature data from PhytOakmeter plot FBOL_14 (Toulenne, France) from 2022
No full textSoil temperature at 15cm depth and air temperature at 60cm height were collected using HOBO Pro V2 loggers, model U23-004. Three loggers were used. After data visualization, unrealistic values were removed manually for each logger and mean temperature values were calculated at 30-minute intervals
Air- and soil temperature data from PhytOakmeter plot FBOL_14 (Toulenne, France) from 2023
No full textSoil temperature at 15cm depth and air temperature at 60cm height were collected using HOBO Pro V2 loggers, model U23-004. Three loggers were used. After data visualization, unrealistic values were removed manually for each logger and mean temperature values were calculated at 30-minute intervals
Sea-floor videos (benthos) along ROV profile PS111_137-1 during POLARSTERN cruise PS111, links to videos
No full textPinus edulis z-scores stack from the southern Rocky Mountains
No full textThese data are several climate sensitive piñon pine (Pinus edulis) pollen records from the Southern Rockies, USA, that aim to produce a detailed continuous record of effective precipitation and ENSO variability for the last 11,000 years. Present-day population dynamics of P. edulis woodlands in the western USA is controlled by winter minimum precipitation. A combination of La Niña-related drought and high temperatures - 'global-change-type drought' - is lethal for trees such as P. edulis. Insolation and solar output changes are suggested as the main triggers for ENSO climate and vegetation changes
Effects of drought on generation 2 Lupinus nipomensis (Fabaceae)
No full textData are for Lupinus nipomensis grown in a dry-down drought experiment at UC Santa Barbara in a second (F1) generation to test for maternal effects on plant growth and reproductive output. The seeds were collected by hand between 2016-12-01 and 2017-02-28 near UC Santa Barbara Greenhouses. The greenhouse had climate controlled conditions with an average temperature of 21.1°C – 22.2°C. Plants were grown in dry-down and well-watered conditions in order to simulate potential maternal effects. Data collected include seed production and vegetative traits. Dry mass and root and shoot variables were measured after drying at 40°C for 72 hours
Processed sensible and latent heat flux for summer 2016 at the EastGRIP site on the Greenland Ice Sheet
No full textProcessed 10 minute surface sensible and latent heat flux measured at 180 cm above snow surface. The eddy covariance system included a Campbell Scientific CSAT3 and a Krypton Hygrometer KH20 which were directed into the mean wind. The latent heat flux was calculated assuming a latent heat of sublimation of 2835 J/g snow. The integration time was 10 minutes with the timestamps indicating the end of the averaging period
