20200501 09554100 1.0 FALSE Arctic_Sea_Ice_Extent 002 https://www.arcgis.com/sharing/rest/content/items/82f50d878c98402cab6240fb4a628fae/info/thumbnail/thumbnail1771938468735.png Geographic GCS_WGS_1984 Angular Unit: Degree (0.017453) <GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.3.0'><WKT>GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG",4326]]</WKT><XOrigin>-400</XOrigin><YOrigin>-400</YOrigin><XYScale>999999999.99999988</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>8.983152841195215e-09</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4326</WKID><LatestWKID>4326</LatestWKID></GeographicCoordinateSystem> 20250128 09142200 20250128 09142200 Esri ArcGIS 13.3.0.52636 Arctic_Sea_Ice_Extent Areas of the ocean that have frozen are considered “sea ice,” and can vary from slushy, barely solid areas to sheets of ice that are meters thick. Since the late 1970s, satellites have been used to monitor both the extent and concentration of sea ice around the world. Each day, the National Snow and Ice Data Center generates sea ice extent analyses from a variety of microwave satellite data sources. A smoothing algorithm is applied to the original shapefiles accessed from NSIDC.<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>This map shows the sea ice extent for the Arctic in polar projection. It contains both the time series of measured ice extents along with the median monthly ice extent, which provides context for the historical average of sea ice for the displayed month. The median extent for the month is calculated using ice extents for that month over the 30-year period from 1981 through 2010. <p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>Another map shows sea ice extent for the Antarctic.<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>Data source<p style='background-color:rgb(255, 255, 255); border:0px solid currentcolor; box-sizing:border-box; color:rgb(74, 74, 74); font-family:"Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin:0px 0px 1.5rem; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><a target='_blank' href='https://www.arcgis.com/home/item.html?id=74fa922e148f440fa1407210f8e13279' rel='nofollow ugc noopener noreferrer'>Arctic Sea Ice Extent Web Map - 1979 to Present - Overview</a> National Snow and Ice Data Center FTP data access  126560144 NOAA Arctic Sea Ice Extent (2023 maximum extent) Fetterer, F., K. Knowles, W. N. Meier, M. Savoie, and A. K. Windnagel. 2017, updated daily. Sea Ice Index, Version 3. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N5K072F8 [June 2019]. By accessing and utilizing certain datasets and content (collectively, the “Data”) made available by Stantec Consulting Services Inc. or one its affiliates, as applicable, (collectively, “Stantec”) and hosted on the ArcGIS Online (“AGO”) platform, you agree that:<ol><li>You will abide by all applicable AGO terms and conditions;</li><li>You will take reasonable measures to safeguard the Data. This includes protecting against unauthorized access, data breaches, or any actions that could compromise the integrity of the Data;</li><li>Except with the prior written consent, you will not modify, copy, distribute, transmit, display, reproduce, publish, license, create derivative works from, transfer or sell the Data, including, but not limited to, the practices of “screen scraping”, “data scraping”, or any other activity with the purpose of extracting the Data;</li><li>Ownership of the Data remains with the party that owns such Data;</li><li>Stantec bears no responsibility in respect of the hosting, retention, recovery, archiving or deletion of the Data. You agree that your access to the Data may be restricted at any time and for any reason in Stantec’s sole discretion;</li><li>The Data is governed by the applicable privacy policy of AGO;</li><li>Stantec disclaims all warranties and conditions of any kind, whether express or implied, relating to the Data including, but not limited to, warranties or conditions of merchantability, fitness for a particular purpose and noninfringement of intellectual property rights;</li><li>The Data may have been prepared based on information provided by others. Stantec has not verified the accuracy, timeliness and/or completeness of the Data and shall not be responsible for any errors or omissions which may be incorporated in the Data as a result. Stantec assumes no responsibility for Data supplied in electronic format, and you accept full responsibility for verifying the accuracy, timeliness and completeness of the Data;</li><li>You release Stantec and its officers, employees, consultants, and agents, from all claims arising in any way from your use of the Data; and</li><li>You will indemnify and hold harmless Stantec, its affiliates, employees, directors, subconsultants and agents from any claims or liabilities that are incurred as a result of your use of the Data.</li><li>You will not add new members to any AGO group associated with the Data without obtaining explicit permission from Stantec and, if applicable, the owners of the Data; and</li><li>You will not share the Data with any third party without the prior written consent of Stantec and, if applicable, the owners of the Data.</li></ol> File Geodatabase Feature Class dataset EPSG 6.2(3.0.1) 0 Simple FALSE 0 TRUE FALSE Arctic_Sea_Ice_Extent Feature Class 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. Rec_Date Rec_Date Date 8 1 0 Rec_Year Year SmallInteger 2 0 0 Rec_Month Month SmallInteger 2 0 0 Rec_Area Area (million km2) Single 4 0 0 Rec_Extent Extent (million km2) Single 4 0 0 Shape_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. 20250128 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