Zobrazeno 1 - 10
of 187
pro vyhledávání: '"H. Kjaer"'
Greenland records of aerosol source and atmospheric lifetime changes from the Eemian to the Holocene
Autor:
S. Schüpbach, H. Fischer, M. Bigler, T. Erhardt, G. Gfeller, D. Leuenberger, O. Mini, R. Mulvaney, N. J. Abram, L. Fleet, M. M. Frey, E. Thomas, A. Svensson, D. Dahl-Jensen, E. Kettner, H. Kjaer, I. Seierstad, J. P. Steffensen, S. O. Rasmussen, P. Vallelonga, M. Winstrup, A. Wegner, B. Twarloh, K. Wolff, K. Schmidt, K. Goto-Azuma, T. Kuramoto, M. Hirabayashi, J. Uetake, J. Zheng, J. Bourgeois, D. Fisher, D. Zhiheng, C. Xiao, M. Legrand, A. Spolaor, J. Gabrieli, C. Barbante, J.-H. Kang, S. D. Hur, S. B. Hong, H. J. Hwang, S. Hong, M. Hansson, Y. Iizuka, I. Oyabu, R. Muscheler, F. Adolphi, O. Maselli, J. McConnell, E. W. Wolff
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-10 (2018)
Past climate changes in Greenland ice were accompanied by large aerosol concentration changes. Here, the authors show that by correcting for transport effects, reliable source changes for biogenic aerosol from North America, sea salt aerosol from the
Externí odkaz:
https://doaj.org/article/cd21059449ce4188baac9393e1761940
Publikováno v:
Environmental DNA, Vol 6, Iss 2, Pp n/a-n/a (2024)
Abstract Retrieval of modern and ancient environmental DNA (eDNA) from sediments has revolutionized our ability to study past and present ecosystems. Little emphasis has been placed, however, on the fundamentals of the DNA–sediment associations in
Externí odkaz:
https://doaj.org/article/66e6008bf4d94b7a841c066dd696d4e8
Publikováno v:
Climate of the Past, Vol 19, Pp 1585-1606 (2023)
The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of p
Externí odkaz:
https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8
Autor:
Nicolaj K. Larsen, Kristian B.R. Kristensen, Marie-Louise Siggaard-Andersen, Claus Heilmann-Clausen, Kurt H. Kjær
Publikováno v:
GEUS Bulletin, Vol 53, Pp 1-7 (2023)
In this study, we test if cost-efficient X-ray fluorescence (XRF) analyses can be used to fingerprint Palaeogene clay and marl deposits in Denmark. A total of 67 samples from key sites in Denmark have been analysed. Our preliminary results indicate t
Externí odkaz:
https://doaj.org/article/8f8069d0977e446bb73e9e734d507599
Publikováno v:
Horticulturae, Vol 9, Iss 1, p 121 (2023)
In horticulture and floriculture, plants are predominantly propagated vegetatively from stem cuttings. Consequently, the success of propagation depends on a plant’s capacity to form adventitious roots (AR) at the basal part of the cutting, and AR f
Externí odkaz:
https://doaj.org/article/d542749df5044d4d983ec75739aa96ce
Autor:
A. S. Søndergaard, N. K. Larsen, O. Steinemann, J. Olsen, S. Funder, D. L. Egholm, K. H. Kjær
Publikováno v:
Climate of the Past, Vol 16, Pp 1999-2015 (2020)
Determining the sensitivity of the Greenland Ice Sheet (GrIS) to Holocene climate changes is a key prerequisite for understanding the future response of the ice sheet to global warming. In this study, we present new information on the Holocene glacia
Externí odkaz:
https://doaj.org/article/f24474e138764082ba37f47967f2c2a6
Autor:
F. Vermassen, N. Andreasen, D. J. Wangner, N. Thibault, M.-S. Seidenkrantz, R. Jackson, S. Schmidt, K. H. Kjær, C. S. Andresen
Publikováno v:
Climate of the Past, Vol 15, Pp 1171-1186 (2019)
The mass loss from the Greenland Ice Sheet has increased over the past 2 decades. Marine-terminating glaciers contribute significantly to this mass loss due to increased melting and ice discharge. Periods of rapid retreat of these tidewater glaciers
Externí odkaz:
https://doaj.org/article/8442680b57144f018d9ff9e46e4295b7
Autor:
Flor Vermassen, Anders A. Bjørk, Marie‐Alexandrine Sicre, John M. Jaeger, David J. Wangner, Kristian K. Kjeldsen, Marie‐Louise Siggaard‐Andersen, Vincent Klein, Jeremie Mouginot, Kurt H. Kjær, Camilla S. Andresen
Publikováno v:
Geophysical Research Letters, Vol 47, Iss 4, Pp n/a-n/a (2020)
Abstract In recent years, several large outlet glaciers in Greenland lost their floating ice tongue, yet little is known regarding their stability over a longer timescale. Here we compile historical documents to demonstrate a major ice tongue collaps
Externí odkaz:
https://doaj.org/article/3699d63015304c9d8ba17c36665273a1
Publikováno v:
Svendsen, E B, Nielsen, L, Nilsson, B, Kjær, K H & Looms, M C 2023, ' Crosshole Ground-Penetrating Radar in Clay-Rich Quaternary Deposits : Toward Characterization of High-Loss Media ', Journal of Geophysical Research: Solid Earth, vol. 128, no. 5, e2022JB025909 . https://doi.org/10.1029/2022JB025909
Knowing the centimeter-to meter-scale distribution of sand in clayey deposits is important for determining the dominating water flow pathways. Borehole information has a high vertical resolution, on the millimeter- to centimeter-scale, but provides p
Publikováno v:
Earth System Science Data, Vol 9, Pp 589-600 (2017)
We present bathymetry and hydrological observations collected in the summer of 2014 from two fjord systems in southeastern Greenland with a multibeam sonar system. Our results provide a detailed bathymetric map of the fjord complex around the isla
Externí odkaz:
https://doaj.org/article/99fec6bd556c4e9fb5ccc1366661bd3c