1,023 research outputs found
Data: Ice slabs thickening drives surface runoff expansion from the Greenland Ice Sheet's percolation zone
No full textData repository associated with the manuscript 'Ice slabs thickening drives surface runoff expansion from the Greenland Ice Sheet's percolation zone', Nicolas Jullien, Andrew J. Tedstone, Horst Machguth, (submitted to Nature Communications) Introduction: We provide a short description of each file present in this data repository, and flag to the corresponding reference when applicable. Please cite the appropriate references when using these data. Data: In this repository: 'master_maps.zip'. Raster files. Surface hydrology connectivity map over the Greeland Ice sheet, first presented in Tedstone and Machguth (2022). The easiest way to handle this dataset is to use the 'master_map_GrIS_mean.vrt' file. 'AreasSupportingRunoff.zip'. Raster files. Shows the areas supporting runoff mapped from 2017-2018 composite winter Sentinel-1 Synthethetic Aperture Radar at C-band using the Horizontal-Vertical polarisation backscatter. 'RunoffLimits.zip'. '.csv' files. Maximum visible runoff limits in 2012 and 2019, sorted for each boxes generated by Tedstone and Machguth (2022). Each '.csv' file stores the data points coordinates (Geographical Reference System: WGS 84 / NSIDC Sea Ice Polar Stereographic North (EPSG:3413)) of the maximum visible runoff limit retrievals after filtering out the outliers. The maximum visible runoff limits where first presented in Tedstone and Machguth (2022). Used in this study but from other datasets: The ice slabs extent and ice slabs thickness were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426 The radargrams displayed in Fig. 6c-f were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426. The following files were used: 'L1_may12_03_1_aggregated.pickle' 'L1_may12_03_2_aggregated.pickle' '20100508_01_114_115_Depth_CORRECTED.pickle' '20140424_01_002_004_Depth_CORRECTED.pickle' '20180427_01_170_172_Depth_CORRECTED.pickle' The surface topography present in Fig. 6g are 10 m resolution mosaics from the ArcticDEMv3 (Porter et al., 2018), and accessible at: https://data.pgc.umn.edu/elev/dem/setsm/ArcticDEM/mosaic/v3.0/ The winter time strain rates map displayed in Fig. 6h were first presented in Poinar and Andrews (2021), and are accessible at: https://ubir.buffalo.edu/xmlui/handle/10477/82127 References: Jullien, N., Tedstone, A. J., Machguth, H., Karlsson, N. B., & Helm, V. (2023). Greenland Ice Sheet Ice Slab Expansion and Thickening. Geophysical Research Letters, 50(10), e2022GL100911. https://doi.org/10.1029/2022GL100911 Poinar, K., & Andrews, L. C. (2021). Challenges in predicting Greenland supraglacial lake drainages at the regional scale. The Cryosphere, 15(3), 1455–1483. https://doi.org/10.5194/tc-15-1455-2021 Porter, C., Morin, P., Howat, I., Noh, M.-J., Bates, B., Peterman, K., Keesey, S., Schlenk, M., Gardiner, J., Tomko, K., Willis, M., Kelleher, C., Cloutier, M., Husby, E., Foga, S., Nakamura, H., Platson, M., Wethington, M., Jr., Williamson, C., … Bojesen, M. (2018). ArcticDEM, Version 3 (Version V1) [dataset]. Harvard Dataverse. https://doi.org/10.7910/DVN/OHHUKH Tedstone, A. J., & Machguth, H. (2022). Increasing surface runoff from Greenland’s firn areas. Nature Climate Change. https://doi.org/10.1038/s41558-022-01371-
Data: Constraining Ice Slab Thickness at the Onset of Visible Surface Runoff from the Greenland Ice Sheet
No full textData repository associated with the manuscript 'Constraining Ice Slab Thickness at the Onset of Visible Surface Runoff from the Greenland Ice Sheet', Nicolas Jullien, Andrew J. Tedstone, Horst Machguth, (under review in the Journal of Glaciology) Introduction: We provide a short description of each file present in this data repository, and flag to the corresponding reference when applicable. Please cite the appropriate references when using these data. Data: In this repository: 'Ice_Layer_Output_Thicknesses_Likelihood_2010_2018_jullienetal2021_modified.csv'. Modified 2010-2018 ice slabs thickness retrievals from Jullien et al., (2023) where ice slabs thickness > 16 m thick and < 1 m thick are retained, and flight-lines not holding ice slab were set to hold an ice content of 0 m thick. 'master_maps.zip'. Raster files. Surface hydrology connectivity map over the Greeland Ice sheet, first presented in Tedstone and Machguth (2022). The easiest way to handle this dataset is to use the 'master_map_GrIS_mean.vrt' file. 'MARv.3.14_MoA_2000_2012.nc'. Melt over accumulation from 2000 to 2012 extracted from MARv3.14. See file 'melt_over_accumulation_calculations.py' in the code repository for post processing analysis. 'RunoffLimits.zip'. '.csv' files. Maximum visible runoff limits in 2012 and 2019, sorted for each boxes generated by Tedstone and Machguth (2022). Each '.csv' file stores the data points coordinates (Geographical Reference System: WGS 84 / NSIDC Sea Ice Polar Stereographic North (EPSG:3413)) of the maximum visible runoff limit retrievals after filtering out the outliers. The maximum visible runoff limits where first presented in Tedstone and Machguth (2022). Used in this study but from other datasets: The ice slabs extent and ice slabs thickness were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426 The radargrams displayed in Fig. 5c-f were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426. The following files were used: 'L1_may12_03_1_aggregated.pickle' 'L1_may12_03_2_aggregated.pickle' '20100508_01_114_115_Depth_CORRECTED.pickle' '20140424_01_002_004_Depth_CORRECTED.pickle' '20180427_01_170_172_Depth_CORRECTED.pickle' The surface topography present in Fig. 5g are 10 m resolution mosaics from the ArcticDEMv3 (Porter et al., 2018), and accessible at: https://data.pgc.umn.edu/elev/dem/setsm/ArcticDEM/mosaic/v3.0/ The winter time strain rates map displayed in Fig. 5h were first presented in Poinar and Andrews (2021), and are accessible at: https://ubir.buffalo.edu/xmlui/handle/10477/82127 References: Jullien, N., Tedstone, A. J., Machguth, H., Karlsson, N. B., & Helm, V. (2023). Greenland Ice Sheet Ice Slab Expansion and Thickening. Geophysical Research Letters, 50(10), e2022GL100911. https://doi.org/10.1029/2022GL100911 Poinar, K., & Andrews, L. C. (2021). Challenges in predicting Greenland supraglacial lake drainages at the regional scale. The Cryosphere, 15(3), 1455–1483. https://doi.org/10.5194/tc-15-1455-2021 Porter, C., Morin, P., Howat, I., Noh, M.-J., Bates, B., Peterman, K., Keesey, S., Schlenk, M., Gardiner, J., Tomko, K., Willis, M., Kelleher, C., Cloutier, M., Husby, E., Foga, S., Nakamura, H., Platson, M., Wethington, M., Jr., Williamson, C., … Bojesen, M. (2018). ArcticDEM, Version 3 (Version V1) [dataset]. Harvard Dataverse. https://doi.org/10.7910/DVN/OHHUKH Tedstone, A. J., & Machguth, H. (2022). Increasing surface runoff from Greenland’s firn areas. Nature Climate Change. https://doi.org/10.1038/s41558-022-01371-
Data: Constraining the Minimum Ice Slab Thickness which Enables Surface Runoff on the Greenland Ice Sheet
No full textData repository associated with the manuscript 'Constraining the Minimum Ice Slab Thickness which Enables Surface Runoff on the Greenland Ice Sheet', Nicolas Jullien, Andrew J. Tedstone, Horst Machguth, (submitted to the Journal of Glaciology) Introduction: We provide a short description of each file present in this data repository, and flag to the corresponding reference when applicable. Please cite the appropriate references when using these data. Data: In this repository: 'Ice_Layer_Output_Thicknesses_Likelihood_2010_2018_jullienetal2021_modified.csv'. Modified 2010-2018 ice slabs thickness retrievals from Jullien et al., (2023) where ice slabs thickness > 16 m thick and < 1 m thick are retained, and flight-lines not holding ice slab were set to hold an ice content of 0 m thick. 'IceSlabsHighEnd_20172018.zip'. High end ice slabs extent in 2017-2018. This corresponds to the corrected 2010-2018 high end ice slabs extent using OIB AR flight-lines in 2017-2018. 'master_maps.zip'. Raster files. Surface hydrology connectivity map over the Greeland Ice sheet, first presented in Tedstone and Machguth (2022). The easiest way to handle this dataset is to use the 'master_map_GrIS_mean.vrt' file. 'RunoffLimits.zip'. '.csv' files. Maximum visible runoff limits in 2012 and 2019, sorted for each boxes generated by Tedstone and Machguth (2022). Each '.csv' file stores the data points coordinates (Geographical Reference System: WGS 84 / NSIDC Sea Ice Polar Stereographic North (EPSG:3413)) of the maximum visible runoff limit retrievals after filtering out the outliers. The maximum visible runoff limits where first presented in Tedstone and Machguth (2022). Used in this study but from other datasets: The ice slabs extent and ice slabs thickness were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426 The radargrams displayed in Fig. 5c-f were first presented in Jullien et al., (2023), and are accessible at: https://zenodo.org/records/7505426. The following files were used: 'L1_may12_03_1_aggregated.pickle' 'L1_may12_03_2_aggregated.pickle' '20100508_01_114_115_Depth_CORRECTED.pickle' '20140424_01_002_004_Depth_CORRECTED.pickle' '20180427_01_170_172_Depth_CORRECTED.pickle' The surface topography present in Fig. 5g are 10 m resolution mosaics from the ArcticDEMv3 (Porter et al., 2018), and accessible at: https://data.pgc.umn.edu/elev/dem/setsm/ArcticDEM/mosaic/v3.0/ The winter time strain rates map displayed in Fig. 5h were first presented in Poinar and Andrews (2021), and are accessible at: https://ubir.buffalo.edu/xmlui/handle/10477/82127 References: Jullien, N., Tedstone, A. J., Machguth, H., Karlsson, N. B., & Helm, V. (2023). Greenland Ice Sheet Ice Slab Expansion and Thickening. Geophysical Research Letters, 50(10), e2022GL100911. https://doi.org/10.1029/2022GL100911 Poinar, K., & Andrews, L. C. (2021). Challenges in predicting Greenland supraglacial lake drainages at the regional scale. The Cryosphere, 15(3), 1455–1483. https://doi.org/10.5194/tc-15-1455-2021 Porter, C., Morin, P., Howat, I., Noh, M.-J., Bates, B., Peterman, K., Keesey, S., Schlenk, M., Gardiner, J., Tomko, K., Willis, M., Kelleher, C., Cloutier, M., Husby, E., Foga, S., Nakamura, H., Platson, M., Wethington, M., Jr., Williamson, C., … Bojesen, M. (2018). ArcticDEM, Version 3 (Version V1) [dataset]. Harvard Dataverse. https://doi.org/10.7910/DVN/OHHUKH Tedstone, A. J., & Machguth, H. (2022). Increasing surface runoff from Greenland’s firn areas. Nature Climate Change. https://doi.org/10.1038/s41558-022-01371-
Reconstruction of Konrad Zuse’s Z3
No full textPart 9: Reconstruction StoriesInternational audienceThis paper describes the reconstruction of Konrad Zuse’s Machine Z3 by the author Horst Zuse from 2008. Konrad Zuse built the Z3 machine between 1939 and 1941 with some friends and a small amount of support by the government. The main idea for reconstructing the Z3 was to learn how this machine works and how much effort is necessary to build such a machine. Another main topic was to show this machine to the public
Author Correction: The dengue-specific immune response and antibody identification with machine learning
No full textCorrection to: npj Vaccineshttps://doi.org/10.1038/s41541-023-00788-7, published online 20 January 2024 In this article, the affiliation details for author Alexander Horst were incorrectly given as Alexander Horst1,2 but should have been Alexander Horst1 and other affiliations are renumbered. The original article has been corrected
Area, volume and ELA changes of West Greenland local glaciers and ice caps from 1985–2020
No full textThe behaviour of mountain glaciers on decadal time scales is a useful indicator for assessing climate change. Although less monitored and studied than the ice sheet, local glaciers and ice caps along the coast of Greenland are substantial contributors to meltwater runoff and sea level rise. This study analyses the cumulative area, ice mass and Equilibrium Line Altitude (ELA) change that occurred on 4100 glaciers and ice caps in West Greenland from 1985 to approximately 2020, using remotely sensed data and including glaciers smaller than 1 km2 in the calculations. The glaciers involved in the study decreased in area by 1774 ± 229 km2 which corresponds to almost −15%. Their surface elevation decreased on average by 20.6 ± 3.9 m, corresponding to a rate of −0.5 ± 0.1 m w.e. a−1. The ELA shows a median regional rise of 150 m with marked local variability and higher median rise in the northern part of the study area. Strong regional gradients in ELA of individual glaciers are found, both towards the ice sheet and in areas where local orography affects precipitation. The observed high spatial variability of changes suggests that more monitoring on sub-regional level is needed
Horst Wessel Dachau Street Sign
Get PDFBlack metal sign reading, 24 Horst Wessel-Strasse.
Information Provided by Michael D. Bulmash: A small metal street sign from the concentration camp of Dachau. The streets in Dachau were named after so-called Nazi heroes, and this particular example identifies the address 24 Horst Wessel Strasse. Horst Ludwig Wessel (1907-1930) was a German Nazi activist who was made a posthumous hero of the Nazi movement following his violent death in 1940. He was the author of the lyrics to the Nazi Party anthem Die Fahnehoch ( The Flag on High ), usually known as the Horst Wessel Song.https://digital.kenyon.edu/bulmash/2251/thumbnail.jp
Glaciers between two drivers
No full textIt is assumed that the monsoon is the dominant influence on Himalayan glaciers. However, a study now investigates the importance of the mid-latitude Westerlies and shows that glacier changes can be triggered from afar
Data: Greenland Ice Sheet ice slab expansion and thickening
No full textDataset from the manuscript 'Greenland Ice Sheet ice slab expansion and thickening' (2022), published by Nicolas Jullien, Andrew J. Tedstone, Horst Machguth, Nanna B. Karlsson, Veit Helm.
If you use any of these file please cite the paper associated with the dataset
Art History and Prehistoric Art: Rethinking their Relationship in the Light of New Observations: The Twentieth Horst Gerson Lecture held on October 4, 2019
No full textThe Twentieth Horst Gerson Lecture held in memory of Horst Gerson (1907-1978) in the aula of the University of Groningen on the 4th of October 2019
The point, from which we are defining the human ability to design artefacts and use symbolic signs is currently shifting to a more distant past. The insights responsible for this pushing back, are based, for example, on findings of very early human-shaped sculpture in Swabia, on the realization that human sign-making started literally hundred thousand years earlier than previously thought, as well as the realization that even hand-axes could carry symbolic meaning. Taken together, these phenomena call for a redefinition of the anthropos, in which the ability to design plays an eminent role. The lecture aims to show how the capacity to discriminate and creatively employ visual and material difference in the environment was a pre-condition for the development of human kind. Against this background, the question rises, if the fruitful collaboration between the fields of aesthetics, art history, and anthropology, that drove nineteenth century research into the origins of human creativity, can be revived.
Author Horst BredekampTranslated by Mitch CohenGraphic design by Tariq JakobsenStichting Gerson LezingenOude Boteringestraat 349712 GK Groningenwww.rug.nl/let/gersonlectures www.facebook.com/gersonlecture
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