Zobrazeno 1 - 10
of 24
pro vyhledávání: '"N. B. Karlsson"'
Autor:
N. B. Karlsson, D. M. Schroeder, L. S. Sørensen, W. Chu, J. Dall, N. H. Andersen, R. Dobson, E. J. Mackie, S. J. Köhn, J. E. Steinmetz, A. S. Tarzona, T. O. Teisberg, N. Skou
Publikováno v:
Earth System Science Data, Vol 16, Pp 3333-3344 (2024)
We present an ice-penetrating radar data set acquired over the Greenland ice sheet by aircraft during the years 1971, 1972, 1974, 1978, and 1979. The data set comprises over 177 000 km of flight lines and contains a wealth of information on the state
Externí odkaz:
https://doaj.org/article/6dc855b246f846b9bf3feeab7f47d490
Autor:
A. Rutishauser, K. M. Scanlan, B. Vandecrux, N. B. Karlsson, N. Jullien, A. P. Ahlstrøm, R. S. Fausto, P. How
Publikováno v:
The Cryosphere, Vol 18, Pp 2455-2472 (2024)
The firn layer on the Greenland Ice Sheet (GrIS) plays a crucial role in buffering surface meltwater runoff, which is constrained by the available firn pore space and impermeable ice layers that limit deeper meltwater percolation. Understanding these
Externí odkaz:
https://doaj.org/article/afc9a4430163452fb05782e854b0c2b2
Autor:
L. Sandberg Sørensen, R. Bahbah, S. B. Simonsen, N. Havelund Andersen, J. Bowling, N. Gourmelen, A. Horton, N. B. Karlsson, A. Leeson, J. Maddalena, M. McMillan, A. Solgaard, B. Wessel
Publikováno v:
The Cryosphere, Vol 18, Pp 505-523 (2024)
Subglacial lakes form beneath ice sheets and ice caps if water is available and if bedrock and surface topography are able to retain the water. On a regional scale, the lakes modulate the timing and rate of freshwater flow through the subglacial syst
Externí odkaz:
https://doaj.org/article/2ff8e0e3b37d4add894ad0b95406690d
Autor:
B. Vandecrux, J. E. Box, A. P. Ahlstrøm, S. B. Andersen, N. Bayou, W. T. Colgan, N. J. Cullen, R. S. Fausto, D. Haas-Artho, A. Heilig, D. A. Houtz, P. How, I. Iosifescu Enescu, N. B. Karlsson, R. Kurup Buchholz, K. D. Mankoff, D. McGrath, N. P. Molotch, B. Perren, M. K. Revheim, A. Rutishauser, K. Sampson, M. Schneebeli, S. Starkweather, S. Steffen, J. Weber, P. J. Wright, H. J. Zwally, K. Steffen
Publikováno v:
Earth System Science Data, Vol 15, Pp 5467-5489 (2023)
The Greenland Climate Network (GC-Net) consists of 31 automatic weather stations (AWSs) at 30 sites across the Greenland Ice Sheet. The first site was initiated in 1990, and the project has operated almost continuously since 1995 under the leadership
Externí odkaz:
https://doaj.org/article/e40bde48ae4c42ada0add0b101a19ca8
Autor:
A. Løkkegaard, K. D. Mankoff, C. Zdanowicz, G. D. Clow, M. P. Lüthi, S. H. Doyle, H. H. Thomsen, D. Fisher, J. Harper, A. Aschwanden, B. M. Vinther, D. Dahl-Jensen, H. Zekollari, T. Meierbachtol, I. McDowell, N. Humphrey, A. Solgaard, N. B. Karlsson, S. A. Khan, B. Hills, R. Law, B. Hubbard, P. Christoffersen, M. Jacquemart, J. Seguinot, R. S. Fausto, W. T. Colgan
Publikováno v:
The Cryosphere, Vol 17, Pp 3829-3845 (2023)
Here, we present a compilation of 95 ice temperature profiles from 85 boreholes from the Greenland ice sheet and peripheral ice caps, as well as local ice caps in the Canadian Arctic. Profiles from only 31 boreholes (36 %) were previously available i
Externí odkaz:
https://doaj.org/article/1dd96eeac3344d69a9340ab907bdc9af
Autor:
W. Colgan, C. Shields, P. Talalay, X. Fan, A. P. Lines, J. Elliott, H. Rajaram, K. Mankoff, M. Jensen, M. Backes, Y. Liu, X. Wei, N. B. Karlsson, H. Spanggård, A. Ø. Pedersen
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 12, Pp 121-140 (2023)
We introduce the design and performance of an electrothermal ice-drilling system designed to insert a temperature sensor cable into ice. The melt tip is relatively simple and low-cost, designed for a one-way trip to the ice–bed interface. The drill
Externí odkaz:
https://doaj.org/article/4fdbcc6c19d144be9a7610b52c79e7b1
Autor:
J. A. MacGregor, W. Chu, W. T. Colgan, M. A. Fahnestock, D. Felikson, N. B. Karlsson, S. M. J. Nowicki, M. Studinger
Publikováno v:
The Cryosphere, Vol 16, Pp 3033-3049 (2022)
The basal thermal state (frozen or thawed) of the Greenland Ice Sheet is under-constrained due to few direct measurements, yet knowledge of this state is becoming increasingly important to interpret modern changes in ice flow. The first synthesis of
Externí odkaz:
https://doaj.org/article/bbd9306ddd004f42ab589bf09fc6579c
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 10, Pp n/a-n/a (2023)
Abstract We use airborne accumulation radar data acquired over the Greenland Ice Sheet between 2002 and 2018 to identify changes in ice slab extent and thickness. We show that ice slabs several meters thick were already present at least as early as 2
Externí odkaz:
https://doaj.org/article/e92e580c4ef2405a8289f607547d849c
Autor:
W. Colgan, A. Wansing, K. Mankoff, M. Lösing, J. Hopper, K. Louden, J. Ebbing, F. G. Christiansen, T. Ingeman-Nielsen, L. C. Liljedahl, J. A. MacGregor, Á. Hjartarson, S. Bernstein, N. B. Karlsson, S. Fuchs, J. Hartikainen, J. Liakka, R. S. Fausto, D. Dahl-Jensen, A. Bjørk, J.-O. Naslund, F. Mørk, Y. Martos, N. Balling, T. Funck, K. K. Kjeldsen, D. Petersen, U. Gregersen, G. Dam, T. Nielsen, S. A. Khan, A. Løkkegaard
Publikováno v:
Earth System Science Data, Vol 14, Pp 2209-2238 (2022)
We compile and analyze all available geothermal heat flow measurements collected in and around Greenland into a new database of 419 sites and generate an accompanying spatial map. This database includes 290 sites previously reported by the Internatio
Externí odkaz:
https://doaj.org/article/b0943d1b53d64d97855b00f78264f334
Autor:
K. D. Mankoff, X. Fettweis, P. L. Langen, M. Stendel, K. K. Kjeldsen, N. B. Karlsson, B. Noël, M. R. van den Broeke, A. Solgaard, W. Colgan, J. E. Box, S. B. Simonsen, M. D. King, A. P. Ahlstrøm, S. B. Andersen, R. S. Fausto
Publikováno v:
Earth System Science Data, Vol 13, Pp 5001-5025 (2021)
The mass of the Greenland ice sheet is declining as mass gain from snow accumulation is exceeded by mass loss from surface meltwater runoff, marine-terminating glacier calving and submarine melting, and basal melting. Here we use the input–output (
Externí odkaz:
https://doaj.org/article/bcfc625038d84d72af8db1c044a677b7