Arctic Weather and Climate | National Snow and Ice Data Center
网页Near the ocean, a maritime climate prevails. In coastal Alaska, along with Iceland and Scandinavia, the winters are stormy and wet, with snow and rainfall reaching 60 centimeters (24 inches) to 125 centimeters (49 inches) each year. Summers in the coastal regions tend to be cool and cloudy; average temperatures hover around 10 °C (50 °F).
Sea Ice Today - National Snow and Ice Data Center
网页2024年9月3日 · Sea ice data is updated daily, with a one-day lag. On occasion, there is data delay which is usually resolved within a few days. The orange line in extent and concentration images (left and middle) and the gray line in the time series (right) indicate 1981 to 2010 average extent for the day shown.
Snow Today - National Snow and Ice Data Center
网页2024年6月5日 · Snow Today is a NASA-funded research project that examines where snow is present, where it has snowed recently, and how much water is in the snow, while also comparing between snow today, snow yesterday, snow last year, and snow over the last few decades. You can find the following resources on our website: The Snow Today project …
Homepage | National Snow and Ice Data Center
网页The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) manages a range of MODIS data, making a suite of snow cover and sea ice data products freely accessible to the public. These data can be used to investigate how snow and ice cover have changed over time, to study Earth’s energy balance, and to feed ...
Science of Glaciers - National Snow and Ice Data Center
网页Glaciers move by internal deformation of the ice, and by sliding over the rocks and sediments at the base. The weight of overlying snow, firn, and ice, and the pressure exerted by upstream and downstream ice deforms glacier ice, in a phenomenon known as creep. A glacier may slide on a thin layer of water at its base.
Learn - National Snow and Ice Data Center
网页Witness the beauty of Earth's disappearing features, captured by NSIDC staff and partners. Quick facts, basic science, and information about snow, ice, and why the cryosphere matters The cryosphere includes all of the snow and ice-covered regions across the planet.
Glaciers - National Snow and Ice Data Center
网页A glacier is an accumulation of ice and snow that slowly flows over land. At higher elevations, more snow typically falls than melts, adding to its mass. Eventually, the surplus of built-up ice begins to flow downhill. At lower elevations, there is usually a higher rate of melt or icebergs break off that removes ice mass.
Ice Sheets Today | National Snow and Ice Data Center
网页2024年8月14日 · Together, the Antarctic and Greenland Ice Sheets contain more than 99 percent of freshwater ice on Earth. If they both completely melted, they would raise sea level by an estimated 67.4 meters (223 feet). Long-term satellite data indicate that through most of the twentieth century, the ice sheets made very little contribution to sea level, and ...
Sea Ice Index Daily and Monthly Image Viewer
网页The daily Sea Ice Index provides a quick look at Arctic-wide changes in sea ice. It provides consistently processed daily ice extent and concentration images and data since 1979. Daily extent images show ice extent at concentrations greater than 15% for a given day with an outline of the typical extent for that day based on a 30-year (1981-2010 ...
Why Glaciers Matter - National Snow and Ice Data Center
网页Why they matter. Glaciers, slow-moving rivers of ice, have sculpted mountains and carved valleys throughout Earth's history. They continue to flow and shape the landscape in many places today. But glaciers affect much more than the landscape. Glacier melt delivers nutrients into lakes, rivers, and oceans. Those nutrients can drive blooms of ...
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