TITLE

Arctic sea-ice motion and its relation to pressure field

AUTHOR(S)
Yunhe Zhao; Antony Liu
PUB. DATE
June 2007
SOURCE
Journal of Oceanography;Jun2007, Vol. 63 Issue 3, p505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Abstract  Daily Arctic sea-ice motion maps during the winter seasons (December–March) from December 1988 to March 2003 derived from NSCAT, QuikSCAT, SSM/I, and AMSRE data by a wavelet analysis method have been merged with those derived from buoy data. These merged sea-ice motion data have been used to study the circulation regimes and winter-to-winter variability of Arctic sea-ice motion. The relation between sea-ice motion and the pressure field in the Arctic Ocean was also studied by applying Principal Component Analysis (PCA) to the monthly merged sea-ice motion data and the monthly pressure field data from IABP. The mean Arctic sea-ice motion map of the 15 winter seasons has two distinct features: the Beaufort Gyre and a cyclonic circulation system in the Eurasian Basin, which moves ice from the Laptev Sea to Fram Strait. The strengths and sizes of the two features change from one winter season to another. Seasons with a strong or normal Beaufort Gyre alternate with seasons with a weak or no Beaufort Gyre every one to three seasons. The principal components of the first two modes of PCA of the monthly sea-ice motion are closely correlated with their counterparts of the monthly pressure field in the Arctic Ocean. The mode-one components of these two anomalies alternate between anticyclonic and cyclonic circulation systems. The correlation between Arctic Oscillation indexes and the principal components of the first mode of PCA of the monthly Arctic sea-ice motion is low but statistically significant.
ACCESSION #
25011085

 

Related Articles

  • Spatial trends of dry spells over Peninsular Malaysia during monsoon seasons. Sayang Deni; Suhaila, Jamaludin; Wan Zawiah Wan Zin; Abdul Aziz Jemain // Theoretical & Applied Climatology;2010, Vol. 99 Issue 3/4, p357 

    This study aims to trace changes in the dry spells over Peninsular Malaysia based on the daily rainfall data from 36 selected rainfall stations which include four subregions, namely northwest, west, southwest, and east for the periods of 1975 to 2004. Six dry spell indices comprising of the main...

  • Infrared observations and numerical modelling of grassland fires in the Northern Territory, Australia. Clark, T. L.; Reeder, M. J.; Griffiths, M.; Packham, D.; Krusel, N. // Meteorology & Atmospheric Physics;Mar2005, Vol. 88 Issue 3/4, p193 

    This paper reports on a small-scale pilot experiment held early in the dry season near Darwin, Australia, in which fine-scale observations of several prescribed fires were made using infrared digital video. Infrared imaging is used routinely to locate fires as infrared radiation suffers little...

  • sum·mer.  // American Heritage Student Science Dictionary;2009, p332 

    A definition of the term "summer" is presented. It refers to the usually warmest season of the year, occurring between spring and autumn. In the Northern Hemisphere, summer extends from the summer solstice to the autumnal equinox.

  • Effects of seasonal change on activity rhythms and swimming behavior of age-0 bluefish (Pomatomus saltatrix) and a description of gliding behavior. Stehlik, Linda L. // Fishery Bulletin;Jan2009, Vol. 107 Issue 1, p1 

    Daily and seasonal activity rhythms, swimming speed, and modes of swimming were studied in a school of spring-spawned age-0 bluefish (Pomatomus saltatrix) for nine months in a 121-kL research aquarium. Temperature was lowered from 20° to 15°C, then returned to 20°C to match the seasonal...

  • Summer dryness in a warmer climate: a process study with a regional climate model. Seneviratne, S. I.; Pal, J. S.; Eltahir, E. A.B.; Schär, C. // Climate Dynamics;Nov2002, Vol. 20 Issue 1, p69 

    Earlier GCM studies have expressed the concern that an enhancement of greenhouse warming might increase the occurrence of summer droughts in mid-latitudes, especially in southern Europe and central North America. This could represent a severe threat for agriculture in the regions concerned,...

  • The Reasons for the Seasons. Plait, Phil // Night Sky;Jul/Aug2005, Vol. 2 Issue 4, p57 

    Provides information on the cycle of the seasons. Effect of the Earth's distance from the Sun on the climate; Influence of orbital variation in Earth's temperature; Reasons of why the seasons are reversed in opposite hemispheres. INSET: Calendar vs. Climate.

  • Fall. Durling, Thea // 21st Century;Oct92, Vol. 4 Issue 2, p6 

    The article presents the author's idea of fall season. The author said that during the season trees will lost their beautiful leaves, and the leaf-lookers do not clog the highways. The season also has a cold air like snow, and tangy like the drifting smoke from the chimney. Soon the ground will...

  • Significant Change of Extratropical Natural Variability Associated with Tropical ENSO Anomaly. Chen, Wibur Y. // Journal of Climate;May2004, Vol. 17 Issue 10, p2019 

    The natural variability over the North Pacific, where the influence of tropical El Niño—Southern Oscillation (ENSO) events is substantial, is examined to determine whether there is a large change owing to a difference in the ENSO forcing anomaly. The hindcast ensemble runs of the...

  • Why Is North Tropical Atlantic SST Variability Stronger in Boreal Spring? Czaja, Arnaud // Journal of Climate;Aug2004, Vol. 17 Issue 15, p3017 

    It is suggested that the seasonal dependence of interannual variability displayed by observed sea surface temperature (SST) over the north tropical Atlantic primarily reflects the seasonality of the remote forcing associated with the North Atlantic and Southern Oscillations and is controlled by...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics