Oceanography: Physical: Ice mechanics and air/sea/ice exchange processesOceanography: Physical: Instruments and techniquesNSCAT Ku-band microwave observations of the Arctic sea ice cover are described on their potential use for estimating ice extent and timing of spring melt. A simple comparative ...
Arctic sea ice has reached its minimum extent (覆盖面积) for the year 2012,setting a record for the lowest summer cover since satellite data collection began.The sea ice extent has fallen to 3.41 million sq km on 18 September-50% lowerthan the 1979-2000 average.On August 26, sea ice ext...
Arctic Research Center(IARC) in corporation with the Japan Aerospace Exploration Agency (JAXA) and the Advanced Earth Science and Technology Organization of Japan (AESTO).The thin blue line indicates the daily Arctic sea ice extent, while the thick line indicates the running 365 day average sea ...
will be the final stronghold of perennial Arctic sea-ice in a warming climate. However, recent observations of prolonged periods of open water raise concerns regarding its long-term stability. Modelling studies suggest a transition from perennial to seasonal sea-ice during the Early Holocene, a per...
This September, sea ice covering the Arctic Ocean fell to the sixth lowest extent in the satellite record, which began in 1979. All of the seven lowest extents have occurred in the last seven years, since 2007. Satellite data analyzed by NSIDC scientists
Satellite passive-microwave data for November 1978 through December 1996 reveal marked seasonal, regional, and interannual variabilities, with an overall decreasing trend of 34,300±3700 km2/yr (2.8%/decade) in Arctic sea ice extents over the 18.2-year period. Decreases occur in all seasons and ...
While many models have been used to study the predictability of climate variables, their performance in predicting sea ice was not well assessed. This study examines the predictability of the Arctic sea ice extent from ensemble prediction systems. The analysis is focused on verification of ...
Climate models project ice-free conditions during summer this century under realistic emission scenarios, reflecting the increase in seasonality in ice cover. To quantify the increased seasonality in the Arctic-Subarctic sea ice system, we define a non-dimensional seasonality number for sea ice extent...
Arctic sea ice extent (SIE) achieves its minimum in September each year and this value has been observed to decline steeply over the satellite era of the past three decades. Yet large year-to-year fluctuations are also present in the September SIE and th
values. While the sea-ice extent was reduced in the Arctic marginal seas in the early and middle Holocene (Extended Data Fig. 2), central Arctic site B28 was probably perennially ice covered throughout the Holocene39, suggesting that higher early and middle Holocene nitrate consumption occurred ...