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Micro-erosion meter images for structure-from-motion, Roaring River, Mammoth Cave, Kentucky, USA
No full textDTC-based monthly mean and maximum LST and their associated soil moisture content ensemble mean of NLDAS-2 model simulations over a randomly distributed 200 sites over the CONUS (lower 48 states of USA) from 2010-2017
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Concentrations of sulfur compounds in surface waters of the Yangtze River Estuary in early spring (2018.3)
No full textSpringtime spatial distributions of biogenic sulfur compounds in the Yangtze River Estuary and their responses to seawater acidification and dust
No full textThe spatial distributions of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethylsulfoxide (DMSO) were investigated in the Yangtze River Estuary from 9 to 23 March, 2018. Besides, we analyzed the vertical distributions of DMS, DMSP, and DMSO in early spring. An onboard incubation experiment was also carried out to study how the production and release of biogenic sulfur compounds responded to simulated seawater acidification and dust deposition
Processed sensible and latent heat flux for summer 2017 at the EastGRIP site on the Greenland Ice Sheet
No full textProcessed 10 minute surface sensible and latent heat flux measured at 160 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
Late Quaternary Sr-Nd-Pb isotope composition of the siliciclastic sediment fraction of the marine sediment core PS72/287-3 from Barrow Strait, Canadian Arctic Archipelago
No full textThe Sr-Nd-Pb isotope composition of siliciclastic sediments from the marine sediment core PS72/287-3 from Barrow Strait was analyzed to identify changing sediment provenances during the last deglaciation and the Holocene. Barrow Strait was blocked by the confluent Laurentide and Innuitian ice sheets during the last glacial period and is hence very interesting to study deglaciation processes in the Canadian Arctic. Varying Sr and Nd isotope ratios during the deglacial period suggest changing sediment sources probably related to ice sheet dynamics and sediment transport processes. After the deglacial period, radiogenic isotope ratios evolved less variable, indicating just slight changes in sediment provenance related to more stable environmental conditions during the Holocene.
Sample preparation and radiogenic isotope analysis were conducted in the laboratories of the Isotope Geochemistry Group at MARUM – Center for Marine Environmental Sciences, University of Bremen, Germany. Sediment samples were leached using a NaOH-buffered solution of hydroxylamine hydrochloride and 15% acetic acid in order to separate the siliciclastic sediment fraction (adapted from Gutjahr et al. 2007, https://doi.org/10.1016/j.chemgeo.2007.03.021). Using a Thermo-Fisher Scientific TRITON Plus thermal ionization mass spectrometer (TIMS), the isotope ratios were determined after the elements had been separated by column chemistry