scholarly journals Dynamics of Manganese and Cerium Enrichments in Arctic Ocean Sediments: A Case Study From the Alpha Ridge

2019 ◽  
Vol 6 ◽  
Author(s):  
Liming Ye ◽  
Christian März ◽  
Leonid Polyak ◽  
Xiaoguo Yu ◽  
Weiyan Zhang
Keyword(s):  
Arctic Ocean

scholarly journals Benthic Oxygen Uptake in the Arctic Ocean Margins - A Case Study at the Deep-Sea Observatory HAUSGARTEN (Fram Strait)

PLoS ONE ◽  
2015 ◽  
Vol 10 (10) ◽  
pp. e0138339 ◽  
Author(s):  
Cecile Cathalot ◽  
Christophe Rabouille ◽  
Eberhard Sauter ◽  
Ingo Schewe ◽  
Thomas Soltwedel
Keyword(s):  
Oxygen Uptake ◽  
Arctic Ocean ◽  
Deep Sea ◽  
The Arctic ◽  
Fram Strait ◽  
The Arctic Ocean

scholarly journals A case Study of old-ice import and export through Peary and Sverdrup Channels in the Canadian Arctic Archipelago: 1998–2005

2006 ◽  
Vol 44 ◽  
pp. 329-338 ◽  
Author(s):  
Bea Alt ◽  
Katherine Wilson ◽  
Tom Carrières
Keyword(s):  
Arctic Ocean ◽  
Canadian Arctic ◽  
The Arctic ◽  
Canadian Arctic Archipelago ◽  
Northwest Passage ◽  
Ice Coverage ◽  
Through Flow ◽  
Ice Conditions ◽  
Import And Export

AbstractThis case Study attempts to quantify the amount and timing of the import, export and through-flow of old ice in the Peary Channel–sverdrup Channel area of the northern Canadian Arctic Archipelago during the period 1998–2005. The Study combines quantitative weekly area-averaged ice coverage evaluations from the Canadian Ice Service (CIS) Digital Archive with detailed analysis of Radarsat imagery and ice-motion results from the CIS ice-motion algorithm. The results Show that in 1998 more than 70% of the old ice in Peary–sverdrup was lost, half by melt and export to the South and the other half by export north into the Arctic Ocean, and that no Arctic Ocean old ice was imported into Peary–sverdrup. A net import of 10% old ice was Seen in 1999, with Some indication of through-flow into Southern channels. In 2000, no net import of old ice occurred in Peary–sverdrup, but there was Significant through-flow, with evidence of old ice reaching the Northwest Passage by November. Full recovery of the old-ice regime was complete by the end of 2001. More than two-thirds of the recovery was due to the in Situ formation of Second-year ice. Conditions in the following 3 years were near normal.

scholarly journals Aerosols indirectly warm the Arctic

2010 ◽  
Vol 10 (7) ◽  
pp. 16775-16796 ◽  
Author(s):  
T. Mauritsen ◽  
J. Sedlar ◽  
M. Tjernström ◽  
C. Leck ◽  
M. Martin ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Aerosol Particles ◽  
Life Time ◽  
Cloud Water ◽  
The Arctic ◽  
Cloud Droplets ◽  
Central Arctic Ocean ◽  
Low Concentration ◽  
Arctic Surface

Abstract. On average, airborne aerosol particles cool the Earth's surface directly by absorbing and scattering sunlight and indirectly by influencing cloud reflectivity, life time, thickness or extent. Here we show that over the central Arctic Ocean, where there is frequently a lack of aerosol particles upon which clouds may form, a small increase in aerosol loading may enhance cloudiness thereby likely causing a climatologically significant warming at the ice-covered Arctic surface. Under these low concentration conditions cloud droplets grow to drizzle sizes and fall, even in the absence of collisions and coalescence, thereby diminishing cloud water. Evidence from a case study suggests that interactions between aerosol, clouds and precipitation could be responsible for attaining the observed low aerosol concentrations.

Alkaline leaching characteristics of biogenic opal in Eocene sediments from the central Arctic Ocean: a case study in the ACEX cores

2014 ◽  
Vol 70 (3) ◽  
pp. 241-249 ◽  
Author(s):  
Shinya Iwasaki ◽  
Kozo Takahashi ◽  
Yusuke Ogawa ◽  
Seiichiro Uehara ◽  
Christoph Vogt
Keyword(s):  
Arctic Ocean ◽  
Central Arctic Ocean ◽  
Alkaline Leaching ◽  
Biogenic Opal ◽  
Leaching Characteristics

scholarly journals Validation of remote-sensing products of sea-ice motion: a case study in the western Arctic Ocean

2020 ◽  
Vol 66 (259) ◽  
pp. 807-821
Author(s):  
Dawei Gui ◽  
Ruibo Lei ◽  
Xiaoping Pang ◽  
Jennifer K. Hutchings ◽  
Guangyu Zuo ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Sea Ice ◽  
Arctic Ocean ◽  
Sea Ice Concentration ◽  
Western Arctic Ocean ◽  
Ice Concentration ◽  
Western Arctic ◽  
Ice Floes ◽  
Relative Errors

AbstractThe accuracy of sea-ice motion products provided by the National Snow and Ice Data Center (NSIDC) and the Ocean and Sea Ice Satellite Application Facility (OSI-SAF) was validated with data collected by ice drifters that were deployed in the western Arctic Ocean in 2014 and 2016. Data from both NSIDC and OSI-SAF products exhibited statistically significant (p < 0.001) correlation with drifter data. The OSI-SAF product tended to overestimate ice speed, while underestimation was demonstrated for the NSIDC product, especially for the melt season and the marginal ice zone. Monthly Lagrangian trajectories of ice floes were reconstructed using the products. Larger spatial variability in the deviation between NSIDC and drifter trajectories was observed than that of OSI-SAF, and seasonal variability in the deviation for NSIDC was observed. Furthermore, trajectories reconstructed using the NSIDC product were sensitive to variations in sea-ice concentration. The feasibility of using remote-sensing products to characterize sea-ice deformation was assessed by evaluating the distance between two arbitrary positions as estimated by the products. Compared with the OSI-SAF product, relative errors are lower (<11.6%), and spatial-temporal resolutions are higher in the NSIDC product, which makes it more suitable for estimating sea-ice deformation.

scholarly journals An Arctic CCN-limited cloud-aerosol regime

2011 ◽  
Vol 11 (1) ◽  
pp. 165-173 ◽  
Author(s):  
T. Mauritsen ◽  
J. Sedlar ◽  
M. Tjernström ◽  
C. Leck ◽  
M. Martin ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
Aerosol Particles ◽  
Life Time ◽  
Cloud Water ◽  
Cloud Droplets ◽  
Central Arctic Ocean ◽  
Low Concentration ◽  
Aerosol Loading ◽  
Arctic Surface

Abstract. On average, airborne aerosol particles cool the Earth's surface directly by absorbing and scattering sunlight and indirectly by influencing cloud reflectivity, life time, thickness or extent. Here we show that over the central Arctic Ocean, where there is frequently a lack of aerosol particles upon which clouds may form, a small increase in aerosol loading may enhance cloudiness thereby likely causing a climatologically significant warming at the ice-covered Arctic surface. Under these low concentration conditions cloud droplets grow to drizzle sizes and fall, even in the absence of collisions and coalescence, thereby diminishing cloud water. Evidence from a case study suggests that interactions between aerosol, clouds and precipitation could be responsible for attaining the observed low aerosol concentrations.

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