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Careers | National Snow and Ice Data Center
Working at NSIDCThe National Snow and Ice Data Center (NSIDC) is made up of a diverse and dedicated group of data and research scientists, project managers,...
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Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/news-analyses/news-stories/arctic-report-card-close-watch-warming-region
Arctic Report Card: A Close Watch on a Warming Region | National Snow and Ice Data Center
Since its inception, the Arctic Report Card has relied upon NSIDC scientists as authors and/or editors nearly every year, and incorporated NSIDC data in every...
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NOAA@NSIDC | National Snow and Ice Data Center
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Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/published-research?page=7
Published Research | National Snow and Ice Data Center
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https://nsidc.org/data/amsre/documents
Documents | National Snow and Ice Data Center
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Scientists Publications | National Snow and Ice Data Center
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Stephanie Wong | National Snow and Ice Data Center
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https://nsidc.org/data/nsidc-0077/versions/2
Nimbus-5 ESMR Polar Gridded Brightness Temperatures, Version 2 | National Snow and Ice Data Center
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https://nsidc.org/data/snowex/documents
Documents | National Snow and Ice Data Center
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https://nsidc.org/learn/parts-cryosphere/snow/why-snow-matters
Why Snow Matters | National Snow and Ice Data Center
We all associate snowstorms with cold weather, but snow's influence on the weather and climate continues long after the storm ends.
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https://nsidc.org/home
Homepage | National Snow and Ice Data Center
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https://nsidc.org/learn/parts-cryosphere/frozen-ground-permafrost
Frozen Ground & Permafrost | National Snow and Ice Data Center
What is frozen ground?When water turns into ice in soil, it becomes frozen ground. This frozen soil has a temperature at or below 0°C (32°F).
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https://nsidc.org/data/data-programs/nsidc-daac
NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) | National...
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https://nsidc.org/sea-ice-today/analyses
Analyses | National Snow and Ice Data Center
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Published Research | National Snow and Ice Data Center
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Documents | National Snow and Ice Data Center
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https://nsidc.org/news-analyses/about-our-analyses
About Our Analyses | National Snow and Ice Data Center
As the frozen parts of our planet face rapid and unprecedented change, NSIDC has been sharing how and why its key features are changing.
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https://nsidc.org/data/masie/masie-faqs
MASIE FAQs | National Snow and Ice Data Center
1. What is the difference between this product and the Sea Ice Index?
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https://nsidc.org/ice-sheets-today/analyses
Analyses | National Snow and Ice Data Center
Our scientific data analysis articles for the Greenland Ice Sheet melt season are typically published from April 1 to November 1.
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https://nsidc.org/learn/cryosphere-glossary/r
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/rain-on-snow/about
About AROSS | National Snow and Ice Data Center
Rain on Snow (ROS) events occur when rain falls onto an existing snowpack and freezes, forming an ice crust that can have severe consequences to wildlife,...
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https://nsidc.org/learn/cryosphere-glossary?page=4
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/data/user-resources/documents?page=3
Documents | National Snow and Ice Data Center
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https://nsidc.org/data/icesat-2/products
ICESat-2 Product Overviews | National Snow and Ice Data Center
ATLAS/ICESat-2 processing begins with two Level 1 products: ATL01, which computes photon times of flight, and ATL02, which corrects them for temperature and...
ice data centericesat 2product overviewsnational snow
https://nsidc.org/our-research
Our Research | National Snow and Ice Data Center
The cryosphere is a global system stretching from the Arctic to the Antarctic and includes all the snow, ice, and other frozen regions across the planet.
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/andrew_barrett
Andrew Barrett | National Snow and Ice Data Center
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https://nsidc.org/data/seaice_index/faq
FAQ | National Snow and Ice Data Center
The Sea Ice Index provides a quick look at Arctic- and Antarctic-wide changes in sea ice.
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https://nsidc.org/data/g02180/versions/1
SHEBA Reconnaissance Imagery, Version 1 | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-history
Our History | National Snow and Ice Data Center
NSIDC's roots go back to
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https://nsidc.org/learn/parts-cryosphere/snow
Snow | National Snow and Ice Data Center
What is snow? Snow is precipitation that forms when water vapor freezes. It is not frozen rain, but a crystallization of ice that typically forms in clouds.
ice data centersnow national
https://nsidc.org/sea-ice-today/analyses/spring-air
Spring is in the air | National Snow and Ice Data Center
Arctic sea ice extent for March set a record low in the 47-year satellite data record. Extent was below average everywhere except the East Greenland Sea.
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https://nsidc.org/our-research/latest-stories
Latest Stories | National Snow and Ice Data Center
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https://nsidc.org/data/icesat/documents
Documents | National Snow and Ice Data Center
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https://nsidc.org/data/masie/about-masie
About MASIE | National Snow and Ice Data Center
MASIE-NH stands for the Multisensor Analyzed Sea Ice Extent – Northern Hemisphere.
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https://nsidc.org/data/modis/version-history
Version History | National Snow and Ice Data Center
The following information summarizes the differences between various versions of MODIS data.
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https://nsidc.org/about/about-nsidc/what-we-do
What We Do | National Snow and Ice Data Center
From the Arctic to the Antarctic, snow and ice play a vital role in regulating Earth’s climate and providing freshwater resources to people, plants, and...
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https://nsidc.org/sea-ice-today/maps
Maps | National Snow and Ice Data Center
Sea ice differs between the Arctic and Antarctic, primarily because of their different geographies. The Arctic is a semi-enclosed ocean, almost completely...
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https://nsidc.org/learn/cryosphere-glossary?page=8
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/julienne_stroeve
Julienne Stroeve | National Snow and Ice Data Center
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https://nsidc.org/about/protecting-your-privacy
Protecting Your Privacy | National Snow and Ice Data Center
Thank you for visiting the National Snow and Ice Data Center's (NSIDC) website.
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Ann Windnagel | National Snow and Ice Data Center
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https://nsidc.org/ice-sheets-today/about-project
About the project | National Snow and Ice Data Center
Ice Sheets Today offers the latest satellite data and scientific analyses on surface melting of Earth's two ice sheets: Greenland in the Northern Hemisphere,...
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https://nsidc.org/learn/ask-scientist?page=1
Ask a Scientist | National Snow and Ice Data Center
These articles provide answers to frequently asked questions related to Earth's frozen realms.
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https://nsidc.org/data/icebridge/help-articles
Help Articles | National Snow and Ice Data Center
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https://nsidc.org/data/viirs/documents
Documents | National Snow and Ice Data Center
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https://nsidc.org/sea-ice-today/analyses/race-bottom
The race to the bottom | National Snow and Ice Data Center
With the waning of sunlight, the pace of sea ice loss in the Arctic is slowing, and the seasonal minimum is expected in mid-September. While a new record low...
ice data centernational snowracebottom
https://nsidc.org/about/media
For the Media | National Snow and Ice Data Center
Welcome to the National Snow and Ice Data Center. Please contact us through the links in the side bar of this page and also make sure to explore our...
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https://nsidc.org/ice-sheets-today/analyses/august-greenland-melt-rain-and-snow
August in Greenland: Melt, rain, and snow | National Snow and Ice Data Center
A strong and persistent melt event occurred in southern Greenland in mid-August 2025, preceded by extensive rain in the same area. Snow cover following the...
ice data centersnow nationalaugustgreenlandmelt
https://nsidc.org/sea-ice-today/analyses/peak-summer-depths-winter
The peak of summer, the depths of winter | National Snow and Ice Data Center
At the end of July 2025, daily sea ice extent in both hemispheres ranked third lowest in the 47-year satellite record.
ice data centerwinter nationalpeaksummerdepths
https://nsidc.org/openaltimetry
OpenAltimetry | National Snow and Ice Data Center
ice data centernational snow
https://nsidc.org/data/programs/eloka
ELOKA | National Snow and Ice Data Center
The Exchange for Observations and Local Knowledge of the Arctic (ELOKA) program at NSIDC is funded by the National Science Foundation (NSF) and works with...
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https://nsidc.org/data/smap/documents
Documents | National Snow and Ice Data Center
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Elizabeth Sheffield | National Snow and Ice Data Center
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Lisa Booker | National Snow and Ice Data Center
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https://nsidc.org/data/icesat-2/help-articles
Help Articles | National Snow and Ice Data Center
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https://nsidc.org/learn/parts-cryosphere/arctic-weather-and-climate/science-arctic-weather-and-climate
The Science of Arctic Weather and Climate | National Snow and Ice Data Center
Factors affecting Arctic weather and climateJust like other areas on Earth, weather and climate in the Arctic depend on a lot of variables, including latitude...
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https://nsidc.org/news-analyses/news-stories/charis-project-summary
CHARIS project summary | National Snow and Ice Data Center
The Contribution to High Asia Runoff (CHARIS) project began in 2012 and ended in 2019. The project aimed to distinguish between input from seasonal snow melt...
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https://nsidc.org/data/aso/documents
Documents | National Snow and Ice Data Center
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https://nsidc.org/data/amsre/version-history
Version History | National Snow and Ice Data Center
This page provides details of the processing and algorithm history for all versions of AMSR-E data products.
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https://nsidc.org/data/aquarius/help-articles
Help Articles | National Snow and Ice Data Center
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Noor jehan Johnson | National Snow and Ice Data Center
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https://nsidc.org/data/google_earth
Google Earth Activities | National Snow and Ice Data Center
The National Snow and Ice Data Center offers some of our data in the form of images. From these, we have created Google Earth files that enable you to view...
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https://nsidc.org/learn/cryosphere-glossary/ablation-area
ablation area | National Snow and Ice Data Center
the area of a glacier where more glacier mass is lost than gained.
ice data centerarea nationalablationsnow
https://nsidc.org/learn/cryosphere-glossary/ablation
ablation | National Snow and Ice Data Center
(1) combined processes (such as sublimation, fusion or melting, evaporation) which remove snow or ice from the surface of a glacier or from a snow-field; also...
ice data centernational snowablation
https://nsidc.org/learn/parts-cryosphere/snow/quick-facts-about-snow
Quick Facts About Snow | National Snow and Ice Data Center
What is snow?Snow is precipitation that forms when water vapor freezes.
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https://nsidc.org/data/measures/documents
Documents | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/patrick_graham
Patrick Graham | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/published-research?page=8
Published Research | National Snow and Ice Data Center
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https://nsidc.org/learn/cryosphere-glossary/i
Cryosphere Glossary | National Snow and Ice Data Center
cryosphere glossary nationalice data centersnow
https://nsidc.org/learn/parts-cryosphere/frozen-ground-permafrost/why-frozen-ground-matters
Why Frozen Ground Matters | National Snow and Ice Data Center
Since permafrost contains lots of organic matter like frozen plants and, occasionally, animals within, it holds an enormous amount of carbon.
matters national snowice data centerfrozen ground
https://nsidc.org/data/soac
Satellite Observations of Arctic Change (SOAC) | National Snow and Ice Data Center
What can satellite data tell us about one of Earth’s coldest regions? These maps of the Arctic are generated from passive microwave data collected by NASA...
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Kevin Schaefer | National Snow and Ice Data Center
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Florence Fetterer | National Snow and Ice Data Center
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https://nsidc.org/data/geophysical-measurements
By Geophysical Measurements | National Snow and Ice Data Center
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https://nsidc.org/news-analyses/news-stories/nsidc-american-geophysical-union-agu-meeting-2025
NSIDC at the American Geophysical Union (AGU) Meeting 2025 | National Snow and Ice Data Center
Representatives from NSIDC will be attending the American Geophysical Union (AGU) Annual Meeting 2025, either virtually or in person in New Orleans, to share...
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https://nsidc.org/about/contact-us
Contact Us | National Snow and Ice Data Center
User Services and general informationEmail: nsidc@nsidc.orgPhone: +1 303.492.6199
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https://nsidc.org/news-analyses/news-stories
News & Stories | National Snow and Ice Data Center
As Earth’s frozen regions change rapidly, NSIDC is committed to growing its research and open access data to better understand these changes.
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https://nsidc.org/scicex
SCICEX: Submarine Arctic Science Program | National Snow and Ice Data Center
The Submarine Arctic Science Program, SCICEX, is a federal interagency collaboration among the operational Navy, research agencies, and the marine research...
ice data centerarctic scienceprogram nationalsubmarinesnow
https://nsidc.org/our-research/featured-projects/navigating-new-arctic-community-office
Navigating the New Arctic Community Office | National Snow and Ice Data Center
Climate change has brought rapid, dramatic changes to the Arctic, affecting ecosystems, communities, and infrastructure in unprecedented ways.
ice data centernew arcticcommunity officenational snownavigating
https://nsidc.org/sea-ice-today/analyses/ringing-new-year-warm-arctic
Ringing in the new year with a warm Arctic | National Snow and Ice Data Center
Air temperatures in December 2024 were above average over the entire Arctic Ocean, continuing the pattern set in November. Average Arctic sea ice extent for...
ice data centernew yeararctic nationalringingwarm
https://nsidc.org/learn/what-cryosphere
What is the Cryosphere? | National Snow and Ice Data Center
What is the cryosphere?The cryosphere refers to Earth’s ice in all its forms. The term comes from the Greek word for icy cold—krios. The cryosphere includes:
ice data centernational snowcryosphere
https://nsidc.org/sipn
SIPN | National Snow and Ice Data Center
The Sea Ice Prediction Network (SIPN) is a collaborative network of scientists and stakeholders working to improve and communicate sea ice prediction knowledge...
ice data centernational snowsipn
https://nsidc.org/rain-on-snow
Arctic Rain On Snow Study (AROSS) | National Snow and Ice Data Center
Rain on Snow (ROS) events occur when rain falls onto an existing snowpack and freezes, forming an ice crust that can have severe consequences to wildlife,...
ice data centerarcticrainsnowstudy
https://nsidc.org/learn/cryosphere-glossary/z
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/jonathon_cavitt
Jonathon Cavitt | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/erik_ramos
Erik Ramos | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/our-people/amy_steiker
Amy Steiker | National Snow and Ice Data Center
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https://nsidc.org/about/about-nsidc/what-we-do/published-research?page=3
Published Research | National Snow and Ice Data Center
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https://nsidc.org/sea-ice-today/analyses/sluggish-freeze-warming-north
Sluggish freeze up in the warming North | National Snow and Ice Data Center
Following the pattern seen in recent years, autumn freeze up has been slow in the Arctic, reflecting the growing heat gain in the ocean mixed layer during...
ice data centernorth nationalsluggishfreezewarming
https://nsidc.org/news-analyses
News & Analyses | National Snow and Ice Data Center
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https://nsidc.org/data/seaice_index/compare-animate
Compare & Animate | National Snow and Ice Data Center
Use the interactive tools below to compare sea ice trends and anomalies and to animate monthly extent, concentrations, anomalies, and trends.
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https://nsidc.org/learn/cryosphere-glossary/m
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/learn/cryosphere-glossary/b
Cryosphere Glossary | National Snow and Ice Data Center
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https://nsidc.org/learn/parts-cryosphere/glaciers/why-glaciers-matter
Why Glaciers Matter | National Snow and Ice Data Center
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...
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https://nsidc.org/data/glims/documents
Documents | National Snow and Ice Data Center
documents national snowice data center
https://nsidc.org/learn/parts-cryosphere/glaciers/glacier-quick-facts
Glacier Quick Facts | National Snow and Ice Data Center
What is a glacier?A glacier is an accumulation of ice and snow that slowly flows over land.
ice data centerquick factsnational snowglacier
https://nsidc.org/data/amsru/version-history
Version History | National Snow and Ice Data Center
This page provides details of the processing and algorithm history for all versions of AMSR Unified data products.
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