Marsh Migration Corridor Envelope for Maryland and Virginia

<p><b>Open the Data Resource:</b> <a href='https://gis-data.chesapeakebay.net/Climate/MMCE.zip' rel='nofollow ugc'>https://gis-data.chesapeakebay.net/Climate/MMCE.zip</a></p> <p>The Marsh Migration Corridor Envelope (MMCE) raster for Maryland and Virginia combines output from three marsh migration models shown two different ways for 2 ft. and 4 ft. future sea level rise scenarios: 1) the specific model combinations and 2) the total number of models that demonstrated agreement in predicting marsh migration in a given area. The sea level rise scenarios are representative of the mid (2 ft.) and end (4 ft.) of the 21st century timeframes. The models used to produce the MMCE include the Sea Level Affecting Marshes Model 5.0 (SLAMM), a modified Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST), and the Marsh Migration Mapping Method of the NOAA Sea Level Rise Viewer (NOAA). Please refer to each model for a complete understanding on limitations. Links to each model methodology and data used to produce the MMCE raster is provided in the process/ methods section of this metadata. Development of the MMCE raster was based on the method by the Virginia Institute of Marine Science (<a href='https://besjournals.onlinelibrary.wiley.com/action/showCitFormats?doi=10.1002%2F2688-8319.12285' rel='nofollow ugc'>Mitchell et al. 2023</a>).</p> <p>The MMCE raster provides information on which model identifies each 30 m pixel into a migration space for the 2 ft. and 4 ft. future sea level rise scenarios. The areas are then classified as: </p><p><b>0</b>, no model predicts marsh migration; </p><p><b>1</b>, only <b>SLAMM </b>model predicts marsh migration; </p><p><b>10</b>, only <b>InVEST </b>model predicts marsh migration; </p><p><b>11</b>, <b>SLAMM and InVEST </b>predict marsh migration; </p><p><b>100</b>, only <b>NOAA </b>model predicts marsh migration; </p><p><b>101</b>, <b>SLAMM and NOAA </b>predict marsh migration; </p><p><b>110</b>, <b>InVEST and NOAA</b> predicts marsh migration; </p><p><b>111</b>, all three models (<b>SLAMM, InVEST, and NOAA</b>) predict marsh migration. </p><p>Existing tidal wetlands and impervious surfaces were removed from the MMCE raster allowing for the representation of marsh migration corridors for future marsh area. Please refer to the processing steps for more details.</p><p>It is important to note that the MMCE does not indicate that an area with more than one model agreement is more accurate than areas where there is only one model projecting marsh migration. Each model has various underlying assumptions and the purpose of the MMCE is to allow for a broad spectrum of assumptions to be included, without needing to state that one model approach is &quot;better&quot; over another.</p>