Results 31 to 40 of about 2,194,928 (297)

Arctic oscillation and Arctic sea‐ice oscillation [PDF]

Geophysical Research Letters, 2000
The variability of the sea‐ice cover in the Arctic and subpolar regions associated with the Arctic Oscillation (AO) was investigated using historical data from 1901 to 1997. Unrotating principal component analyses (or empirical orthogonal functions, EOFs) were applied to demeaned, normalized sea‐level pressure (SLP), surface air temperature (SAT), and ...
Jia Wang, Moto Ikeda
openaire   +1 more source

A Feasibility Study of Sea Ice Motion and Deformation Measurements Using Multi-Sensor High-Resolution Optical Satellite Images

Remote Sensing, 2017
Sea ice motion and deformation have generally been measured using low-resolution passive microwave or mid-resolution radar remote sensing datasets of daily (or few days) intervals to monitor long-term trends over a wide polar area. This feasibility study
Chang-Uk Hyun, Hyun-cheol Kim
doaj   +1 more source

The early twentieth century warming and winter Arctic sea ice [PDF]

The Cryosphere, 2012
The Arctic has featured the strongest surface warming over the globe during the recent decades, and the temperature increase has been accompanied by a rapid decline in sea ice extent.
V. A. Semenov, M. Latif
doaj   +1 more source

Classification of sea ice types in Sentinel-1 synthetic aperture radar images [PDF]

The Cryosphere, 2020
A new Sentinel-1 image-based sea ice classification algorithm using a machine-learning-based model trained in a semi-automated manner is proposed to support daily ice charting.
J.-W. Park, J.-W. Park, A. A. Korosov, M. Babiker, J.-S. Won, M. W. Hansen, M. W. Hansen, H.-C. Kim   +7 more
doaj   +1 more source

Observing Arctic Sea Ice

Oceanography, 2022
Our understanding of Arctic sea ice and its wide-ranging influence is deeply rooted in observation. Advancing technologies have profoundly improved our ability to observe Arctic sea ice, document its processes and properties, and describe atmosphere-ice-ocean interactions with unprecedented detail.
Melinda Webster, Ignatius Rigor, Nicholas Wright   +2 more
openaire   +1 more source

Evaluation of Operation IceBridge quick-look snow depth estimates on sea ice [PDF]

, 2015
We evaluate Operation IceBridge (OIB) ‘quick-look’ (QL) snow depth on sea ice retrievals using in situ measurements taken over immobile first-year ice (FYI) and multi-year ice (MYI) during March of 2014. Good agreement was found over undeformed FYI (-4.5
Joshua King, Richter-Menge, Jacqueline, Howell, Stephen, Kurtz, Nathan, Haas, Christian, Stephen Howell, Justin F. Beckers, Nathan Kurtz, Peter Toose, King, Joshua, Beckers, Justin, Chris Derksen, Nick Rutter, Christian Haas, Jacqueline Richter‐Menge, Toose, Peter, Rutter, Nick, Derksen, Chris   +17 more
core   +1 more source

Optimization of the k-nearest-neighbors model for summer Arctic Sea ice prediction

Frontiers in Marine Science, 2023
The Arctic sea ice plays a significant role in climate-related processes and has a considerable effect on humans, however accurately predicting the Arctic sea ice concentration is still challenging.
Yongcheng Lin, Qinghua Yang, Xuewei Li, Xuewei Li, Chao-Yuan Yang, Yiguo Wang, Jiuke Wang, Jingwen Liu, Sizhe Chen, Jiping Liu   +9 more
doaj   +1 more source

Recent trends in melting conditions on the Antarctic Peninsula and their implications for ice-sheet mass balance and sea level [PDF]

, 2006
Long-term records from meteorological stations on the Antarctic Peninsula show strong rising trends in the annual duration of melting conditions. In each case, the trend is statistically significant and represents a major increase in the potential for ...
Dowdeswell, J.A., Bassford, R. P., Glazovsky, A.F., Glazovsky, A. F., Siegert, M. J,, Macheret, Y.Y., Macheret, Y. Y., Vaughan, David G., J. A. Dowdeswell, David G. Vaughan, A. F. Glazovsky, Oerlemans, J., R. P. Bassford, Bassford, R.P., Y. Y. Macheret, M. J. Siegert, Siegert, M. J., Dowdeswell, J. A., Siegert, M.J., J. Oerlemans, Hoch, Günter, Dowling, Carolyn, Vaughn, Bruce H., Olofsson, Johan,, Körner, Christian, Lyons, W. Berry, Gooseff, Michael N., Fountain, Andrew G., McKnight, Diane M.   +28 more
core   +2 more sources

Unraveling the Arctic Sea Ice Change since the Middle of the Twentieth Century

Geosciences, 2023
Changes in Arctic sea ice since the middle of the last century are explored in this study. Both observations and climate model simulations show an overall sea ice expansion during 1953–1970 but a general sea ice decline afterward. Anthropogenic aerosols,
Nathan Kong, Wei Liu
doaj   +1 more source

Bacteria and viruses in Arctic Sea ice

Oceanology, 2018
We studied vertical distribution of bacteria and viruses in different layers of the Arctic sea ice drilled at the North Pole. The sampled multi-year ice was characterized by uneven vertical distribution of bacterial abundance. This characteristic varied within the range of 8±1.2 ×103 to 95±2.6 ×103 cells ml-1. The average bacterial abundance was 28±2.9×
Sazhin, Andrey, Romanova, Nadezhda, Kopylov, Alexander, Zabotkina, Elena   +3 more
openaire   +2 more sources