eCite Digital Repository
Characterization of sea-ice kinematic in the Arctic outflow region using buoy data
Citation
Lei, R and Heil, P and Wang, J and Zhang, Z and Li, Q and Li, N, Characterization of sea-ice kinematic in the Arctic outflow region using buoy data, Polar Research, 35 Article 22658. ISSN 0800-0395 (2016) [Refereed Article]
 | PDF 2Mb |
Copyright Statement
Copyright 2016 R. Lei et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by-nc/4.0/
DOI: doi:10.3402/polar.v35.22658
Abstract
Data from four ice-tethered buoys deployed in 2010 were used to investigate
sea-ice motion and deformation from the Central Arctic to Fram Strait. Seasonal
and long-term changes in ice kinematics of the Arctic outflow region were
further quantified using 42 ice-tethered buoys deployed between 1979 and
2011. Our results confirmed that the dynamic setting of the transpolar drift
stream (TDS) and Fram Strait shaped the motion of the sea ice. Ice drift was
closely aligned with surface winds, except during quiescent conditions, or during
short-term reversal of the wind direction opposing the TDS. Meridional ice
velocity south of 858N showed a distinct seasonal cycle, peaking between late
autumn and early spring in agreement with the seasonality of surface winds.
Inertia-induced ice motion was strengthened as ice concentration decreased in
summer. As ice drifted southward into the Fram Strait, the meridional ice speed
increased dramatically, while associated zonal ice convergence dominated the
ice-field deformation. The Arctic atmospheric Dipole Anomaly (DA) influenced
ice drift by accelerating the meridional ice velocity. Ice trajectories exhibited less
meandering during the positive phase of DA and vice versa. From 2005 onwards,
the buoy data exhibit high Arctic sea-ice outflow rates, closely related to
persistent positive DA anomaly. However, the long-term data from 1979 to 2011
do not show any statistically significant trend for sea-ice outflow, but exhibit
high year-to-year variability, associated with the change in the polarity of DA.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | sea-ice kinematic, Arctic Ocean |
| Research Division: | Earth Sciences |
| Research Group: | Physical Geography and Environmental Geoscience |
| Research Field: | Glaciology |
| Objective Division: | Environment |
| Objective Group: | Other Environment |
| Objective Field: | Environment not elsewhere classified |
| Author: | Heil, P (Dr Petra Heil) |
| ID Code: | 113761 |
| Year Published: | 2016 |
| Web of Science® Times Cited: | 1 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2017-01-19 |
| Last Modified: | 2017-03-31 |
| Downloads: | 4 View Download Statistics |
Repository Staff Only: item control page