Map of resilient wetlands for the Climate Passages Project

This dataset was created for The Nature Conservancy (TNC) by the Desert Research Institute (DRI) under a contract entitled Climate Passages (BLM L22AC00234-00). The purpose of this effort was to generate a 500 meter raster grid that would serve as a basemap for species dispersal modeling. The grid represents the distribution of wetland areas whose properties were similar to sites that TNC expects to remain resilient under climate change pressures due to persistent groundwater sources. TNC identified 37 resilient terrestrial wetland areas corresponding to 127 grid cells. These were contrasted with 160 grid cells from other wetlands in the study area that demonstrated interannual drought sensitivity based on climate data and the normalized difference vegetation index (NDVI) from Landsat satellite imagery since 1985. The persistence of larger water bodies since 1985 was mapped using a threshold of Landsat near infrared reflectance and the modified normalized difference wetness index (MNDWI..., Study Area and Raster Model Grid The study area of the Climate Passages Project covers a large region that includes all of Nevada, and portions of California, Oregon, Idaho, Montana, Utah, and Arizona. An Albers equal area projection was selected to properly balance the distortions of representing such a large region with a two-dimensional raster grid. The projection parameters are provided in Table 1. A 500-meter spatial resolution was selected for this study based on computer memory limitations in the dispersal modeling software. The raster grid for the study area was 2,204 rows by 2,665 columns. Table 1: ArcMap projection parameters for the modeling grid. Projection Albers False_Easting 0.0 False_Northing 0.0 Central_meridian -116.0 Standard_Parallel_1 29.5 Standard_Parallel_2 45.5 Latitude_of_origin 23.0 Linear Unit Meter Geographic Coordinate System GCS_NAD_1983_2011 Datum D_NAD_1983_2011 Wetland Area Delineations The analysis leading to the estimation of ..., # Map of resilient wetlands for the Climate Passages Project Dataset DOI: [10.5061/dryad.dz08kps8x](10.5061/dryad.dz08kps8x) ## Description of the data and file structure These data are raster grids with with a spatial resolution of 500m (2,204 rows, 2,665 columns) that represent wetland characteristics that are relevant to modeling climate change resilience over a region centered on the Great Basin in the western United States and including areas of Arizona, California, Idaho, Montana, Nevada, Oregon, and Utah. ### Files and variables This zipfile (CP_V2.zip) contains the following GeoTIFF raster grids:Â * frequency of inundation (CPwetyears_V2.tif): number of years that summertime Landsat imagery indicated inundation * persistent shoreline (CPshore_V2.tif): edge of waterbodies where CPwetyears_V2.tif >= 35 and some manual editing * probability of resilient wetlands (CPprobability_V2.tif): probability estimates from the L2 regularized logistic regression * area of mapped wetlands..., ,本数据集由沙漠研究所（Desert Research Institute, DRI）依据编号为《Climate Passages》（合同号BLM L22AC00234-00）的合同，为自然保护协会（The Nature Conservancy, TNC）制作。本项目的核心目标是生成一张500米分辨率的栅格网格，作为物种扩散建模的底图。该网格表征了湿地的分布特征，这类湿地因拥有稳定的地下水源，预计在气候变化压力下仍可保持生态韧性。TNC共识别出37处具备韧性的陆地湿地，对应127个栅格单元。研究区域内另有160个栅格单元来自其他湿地，结合1985年以来的气候数据与Landsat卫星影像的归一化差分植被指数（Normalized Difference Vegetation Index, NDVI）分析显示，此类湿地存在年际干旱敏感性。1985年以来大型水体的存续情况，通过Landsat近红外反射率阈值与改进型归一化差异水体指数（Modified Normalized Difference Wetness Index, MNDWI）完成了制图。 # 研究区域与栅格模型网格 气候通道项目的研究区域覆盖广袤地域，包含内华达州全境，以及加利福尼亚州、俄勒冈州、爱达荷州、蒙大拿州、犹他州与亚利桑那州的部分区域。为平衡二维栅格网格表征超大区域时的投影变形，本研究选用阿尔伯斯等面积投影（Albers equal area projection），投影参数详见表1。考虑到扩散建模软件的内存限制，本研究确定采用500米的空间分辨率。研究区域的栅格网格尺寸为2204行×2665列。 ## 表1：建模网格的ArcMap投影参数 | 投影参数项 | 参数值 | | ---- | ---- | | 投影（Projection） | Albers | | 东移伪原点（False_Easting） | 0.0 | | 北移伪原点（False_Northing） | 0.0 | | 中央经线（Central_meridian） | -116.0 | | 第一标准纬线（Standard_Parallel_1） | 29.5 | | 第二标准纬线（Standard_Parallel_2） | 45.5 | | 原点纬度（Latitude_of_origin） | 23.0 | | 线性单位（Linear Unit） | 米（Meter） | | 地理坐标系（Geographic Coordinate System） | GCS_NAD_1983_2011 | | 大地基准面（Datum） | D_NAD_1983_2011 | # 湿地面积划定 用于估算湿地韧性的分析…… # 气候通道项目韧性湿地分布图 数据集DOI：10.5061/dryad.dz08kps8x ## 数据与文件结构说明 本数据集为空间分辨率500米（2204行×2665列）的栅格网格，表征了以美国西部大盆地为核心、涵盖亚利桑那州、加利福尼亚州、爱达荷州、蒙大拿州、内华达州、俄勒冈州及犹他州区域内，与气候变化韧性建模相关的湿地特征。 ### 文件与变量 本压缩包（CP_V2.zip）包含以下GeoTIFF栅格网格： * 淹没频次（CPwetyears_V2.tif）：夏季Landsat影像显示存在淹没的年份数 * 持久岸线（CPshore_V2.tif）：满足`CPwetyears_V2.tif ≥ 35`且经人工编辑修正的水体边界 * 韧性湿地概率（CPprobability_V2.tif）：基于L2正则化逻辑回归（L2 regularized logistic regression）得到的概率估计值 * 已制图湿地面积……