Constructing a time series of dissolved 230 th from 1991 to 2015 enables the identification of processes that control the temporal development of 230 th distributions in the amundsen basin. Nabos research cruise 2018.
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The contrasting basement structures are related in our interpretation to the differing depositional histories of the two basins and to asymmetric spreading in cenozoic times.
Amundsen basin. 90 n in the amundsen basin of the arctic ocean air 3 8 degc 25 degf water 1 4 degc 29 degf wind 16 knots from n not certain what the n on the meteorological display means considering our location on station 34 at the north pole. This decrease is accompanied by. A new stratigraphic model and estimated sedimentation rates of the western amundsen basin arctic ocean are presented based on multichannel seismic reflection data seismic refraction data magnetic data and integrated with the sedimentary sequence from the central arctic ocean obtained during the arctic coring expedition.
The russian american cooperation nansen and amundsen. The sedimentary succession of the amundsen basin is composed of cross bedded quartzarenite and sandstone entirely within sequence b and is termed the shaler carbonate rhythmite representing sand shoal to barrier beach supergroup rainbird et al 1994a. After 2007 230 th concentrations decreased significantly over the entire water column particularly between 300 and 1500 m.
The amundsen basin with depths up to 4 4 km 2 7 mi is the deepest abyssal plain in the arctic ocean the amundsen basin is embraced by the lomonosov ridge from to and the gakkel ridge from to it is named after the polar researcher roald amundsen together with the nansen basin the amundsen basin is often summarized as eurasian basin. In the amundsen basin sediments are only 1 7 2 0 km thick and oceanic basement younger than chron 13 shallows abruptly some 100 km north of the median valley. The shaler supergroup and back barrier lagoon environments.
The 55 day cruise began in early august from kirkenes norway bound for the nansen and amundsen basins where warmer atlantic water enters the much colder arctic ocean. P strong abstract strong this study provides dissolved and particulate span class inline formula sup 230 sup th span and span class inline formula sup. The nansen basin also central basin formerly fram basin is an abyssal plain with water depths of around 3 km in the arctic ocean and together with the deeper amundsen basin part of the eurasian basin it is named after fridtjof nansen the nansen basin is bounded by the gakkel ridge on the one side and by the barents sea continental shelf on the other.
Bulletin of the american meteorological society. Dear family friends and colleagues. Skip to main content.
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