Blar i Geophysical Institute på tittel
Viser treff 1149-1168 av 1195
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A view on possible regime shifts in the North Atlantic subpolar gyre in the mid 1920s and 1990s
(Master thesis, 2014-10-22)There is strong observational support for two significant warming episodes of the North Atlantic Subpolar Gyre (SPG), one starting in the mid 1920s the other in the mid 1990s. Possible mechanisms responsible for the two ... -
Volume transport and mixing of the cold water overflow downstream of the Faroe Bank Channel from one year of moored measurements
(Peer reviewed; Journal article, 2016-03-15)One-year long time series of current velocity and temperature from eight moorings deployed in the Faroe Bank Channel (FBC) are analysed to describe the structure and variability of the dense overflow plume on daily to ... -
Vortex interaction in the wake of a two- and three-bladed wind turbine
(Journal article; Peer reviewed, 2020)The vortex interaction in the wake behind a two- and three-bladed model scale wind turbine is investigated. The two rotors have equal solidity, and produce similar power and thrust at the design tip speed ratio. Phase-averaged ... -
Warm air intrusions reaching the MOSAiC expedition in April 2020- The YOPP targeted observing period (TOP)
(Journal article; Peer reviewed, 2023)In the spring period of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition, an initiative was in place to increase the radiosounding frequency during warm air intrusions in the ... -
Warm Atlantic water explains observed sea ice melt rates north of Svalbard
(Journal article; Peer reviewed, 2020)Warm Atlantic water (AW) that flows northward along the Svalbard west coast is thought to transport enough heat to melt regional Arctic sea ice effectively. Despite this common assumption, quantitative requirements necessary ... -
Warm Circumpolar Deep Water at the Western Getz Ice Shelf Front, Antarctica
(Peer reviewed; Journal article, 2019-01-04)The Getz Ice Shelf is one of the largest sources of fresh water from ice shelf basal melt in Antarctica. We present new observations from three moorings west of Siple Island 2016–2018. All moorings show a persistent flow ... -
Warmer and Wetter Winters over the high-latitude North Atlantic : an atmospheric circulation perspective
(Doctoral thesis, 2020-05-19)The high-latitude North Atlantic -especially the Svalbard archipelago and its surrounding seas - has undergone remarkable changes in the last half-century. These regions are recognized as a hotspot of the Arctic Amplification, ... -
Warming beneath an East Antarctic ice shelf due to increased subpolar westerlies and reduced sea ice
(Journal article; Peer reviewed, 2023)Understanding how climate change influences ocean-driven melting of the Antarctic ice shelves is one of the greatest challenges for projecting future sea level rise. The East Antarctic ice shelf cavities host cold water ... -
Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912-2009)
(Peer reviewed; Journal article, 2013-05-06)The recently observed warming of west Spitsbergen fjords has led to anomalous sea-ice conditions and has implications for the marine ecosystem. We investigated long-term trends of maximum temperature of Atlantic Water (AW) ... -
Water mass exchange, pathways and the mesoscale eddy field in the Lofoten Basin of the Norwegian Sea
(Doctoral thesis, 2020-11-05)The Lofoten Basin situated in the Norwegian Sea, plays a central role in redistributing and modifying the warm Atlantic Water carried poleward with the Norwegian Atlantic Current. Increased residence time of the warm ... -
Water mass modification in an Arctic fjord through cross-shelf exchange: The seasonal hydrography of Kongsfjorden, Svalbard
(Journal article, 2005-12-08)Kongsfjorden and the West Spitsbergen Shelf is a region whose seasonal hydrography is dominated by the balance of Atlantic Water, Arctic waters, and glacial melt. Regional seasonality and the cross-shelf exchange processes ... -
Water mass modification over the continental shelf north of Ronne Ice Shelf, Antarctica
(Journal article, 2003-08-13)We use new data from the southern Weddell Sea continental shelf to describe water mass conversion processes in a formation region for cold and dense precursors of Antarctic Bottom Water. The cruises took place in early ... -
Water mass transformation and the North Atlantic Current in three multi-century climate model simulations
(Journal article, 2012-11)The warm and saline Subtropical Water carried by the North Atlantic Current undergoes substantial transformation on its way to higher latitudes as heat is released from ocean to atmosphere. The geographical distribution ... -
Water mass transformation in the Greenland Sea during the period 1986-2016
(Peer reviewed; Journal article, 2019-01)Hydrographic measurements from ships, autonomous profiling floats, and instrumented seals over the period 1986–2016 are used to examine the temporal variability in open-ocean convection in the Greenland Sea during winter. ... -
Water mass transformation in the Iceland Sea
(Peer reviewed; Journal article, 2015)The water mass transformation that takes place in the Iceland Sea during winter is investigated using historical hydrographic data and atmospheric reanalysis fields. Surface densities exceeding σθ ¼ 27:8 kg=m3, and hence ... -
Water mass transformation in the Iceland Sea: Contrasting two winters separated by four decades
(Journal article; Peer reviewed, 2022)Dense water masses formed in the Nordic Seas flow across the Greenland–Scotland Ridge and contribute substantially to the lower limb of the Atlantic Meridional Overturning Circulation. Originally considered an important ... -
Water mass transformations and air-sea exchange in the Barents Sea
(Doctoral thesis, 2011-09-22)Water mass transformation processes in the Barents Sea and their interannual to decadal variability are studied using a regional coupled ice-ocean model and observational data. Long-term data allows for assessment of ... -
Water mass transformations in the Barents Sea and linkages to the Polar Front
(Doctoral thesis, 2010-10-29) -
Waterside convection and stratification control methane spreading in supersaturated Arctic fjords (Spitsbergen)
(Journal article; Peer reviewed, 2021)Seasonally ice covered in the past, the fjords in West Spitsbergen turn into being perennially ice free in the present. This feedback to Arctic amplification of global warming changes gas fluxes at the atmosphere-ocean ...