LBA Regional Vegetation and Soils, 1-Degree (Wilson and Henderson-Sellers)

This data set is a subset of a global vegetation and soils data set by Wilson and Henderson-Sellers (1985a). The subset was created for the study area of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) in South America (i.e., 10 N to 25 S, 30 to 85 W). The data are in ASCII GRID format.The original global data set (Wilson and Henderson-Sellers 1985a) is an archive of soil type and land cover data derived for use in general circulation models (GCMs). The data were collated from maps depicting natural vegetation, forestry, agriculture, land use, and soil, and they were archived at a resolution of 1 latitude by 1 longitude. The data set indicates soil type, soil data reliability, primary vegetation, secondary vegetation, and land cover data reliability. Approximately 50 land cover classifications are used, including categories for agricultural and urban uses. The inclusion of secondary vegetation type is particularly useful in areas with cover types that may have a fragmented distribution, such as in areas of urban development. The soil type data are classified according to climatically important properties for GCMs, and they indicate color (light, medium, or dark), texture, and drainage quality of the soil. The land cover data are compatible with the soils data, forming a coherent and consistent data set. The reliability of the land cover data is ranked on a scale of 1 to 5 (high to low). The reliability of the soil data is ranked as high, good, moderate, fair, or poor.Recommendations for the use of these data, as well as more detailed information can be found in Wilson and Henderson-Sellers (1985b).Further data set information can be found at ftp://daac.ornl.gov/data/lba/land_use_land_cover_change/wilhend/comp/wilhend_readme.pdf.LBA was a cooperative international research initiative led by Brazil. NASA was a lead sponsor for several experiments. LBA was designed to create the new knowledge needed to understand the climatological, ecological, biogeochemical, and hydrological functioning of Amazonia; the impact of land use change on these functions; and the interactions between Amazonia and the Earth system. More information about LBA can be found at http://www.daac.ornl.gov/LBA/misc_amazon.html.

本数据集为Wilson与Henderson-Sellers（1985a）所编纂的全球植被与土壤数据集之子集。该子集旨在为南美洲亚马逊地区（即10°N至25°S，30°W至85°W）大规模生物圈-大气实验（LBA）的研究区域构建。数据采用ASCII GRID格式存储。原始全球数据集（Wilson与Henderson-Sellers 1985a）作为土壤类型和土地覆盖数据档案，专为通用环流模型（GCMs）的应用而编制。数据源自描绘自然植被、林业、农业、土地利用和土壤的地图，并以1纬度×1经度的分辨率进行归档。数据集指示了土壤类型、土壤数据可靠性、主要植被、次要植被以及土地覆盖数据可靠性。数据集中包含约50种土地覆盖分类，其中涵盖农业和城市用途的分类。次要植被类型的包含对于可能呈现破碎分布的覆盖类型区域，如城市化区域，尤为有用。土壤类型数据根据对GCMs气候重要特性的分类，并指示土壤的颜色（浅、中、深）、质地和排水质量。土地覆盖数据与土壤数据兼容，形成一个连贯且一致的数据集。土地覆盖数据的可靠性按1至5级（高至低）进行评级。土壤数据的可靠性则分为高、良好、适中、尚可或较差。关于这些数据的使用建议及更详细的信息，可参考Wilson与Henderson-Sellers（1985b）。更多数据集信息可从ftp://daac.ornl.gov/data/lba/land_use_land_cover_change/wilhend/comp/wilhend_readme.pdf获取。LBA是由巴西领导的国际合作研究项目，NASA为多个实验的主要赞助商。LBA旨在产生新知识，以理解亚马逊地区的气候、生态、生物地球化学和水文学功能；土地利用变化对这些功能的影响；以及亚马逊地区与地球系统之间的相互作用。更多关于LBA的信息可从http://www.daac.ornl.gov/LBA/misc_amazon.html获取。