Cartograms of point levels of Total Copper measured on QMRS, Campaign 1 (2001-2009)

The Soil Quality Measurement Network (RMQS) is a national long-term soil quality assessment and monitoring program. This network is based on the monitoring of 2240 sites representative of French soils and their occupations, distributed throughout the French territory (metropole and overseas) according to a systematic grid of 16 km side. The sites cover various occupations (large crops, permanent meadows, forests, vineyards and orchards, low-anthropised environments, urban parks). The physical, chemical and biological properties of soils are measured at each site with a periodicity of about fifteen years. These analyses are associated with the investigation of factors explaining the spatial and temporal variability of soil properties (biophysical variables, sources of contamination, history of occupation and site management practices). The first tax year in metropolitan France took place from 2000 to 2009. This campaign, focused on soil contamination, made it possible to map the main soil parameters (28 variables) as well as the contents of 12 metal trace elements (ETMs) in total or partial extraction and 70 persistent organic pollutants. All the sampling protocols, measurements and observations made on each site during this campaign are detailed in the 2006 Soil Quality Measurement Network Manual. Obtaining the values: The cartograms produced are based on the results of analyses of 2146 metropolis sites, spread over 2146 cells, implemented during the first RMQS campaign (2000-2009). The analyses were carried out on composite samples taken from the tarere using 2 layers of sampling (0-30 cm or thickness of the layer worked in cultured soil called surface composite or composite 1 and the underlying layer up to 50 cm, called sub-surface composite or composite 2). Each composite sample was made from a mixture of 25 individual samples taken from a 400 m² sampling area according to a stratified random sampling plan (see description in the RMQS Manual, 2006). A third layer of sampling from composite samples could be formed in forest or grassland from the holorganic horizons (corresponding to the soil horizons OF and OH) when these horizons were sufficiently thick (at least 1 cm) and continuous on the sampling surface. The cartograms are a geographical representation of the actual contents (concentration in unit of measurement per mass of air dried soil) measured for the parameter quoted, at each point of the Network of Soil Quality Measurements (RMQS), during the first campaign (2000-2009). The soil analyses were carried out by the Laboratory for Soil Analysis of the INRA in Arras during the campaign, from 2002 to 2011, as the network was deployed, and for certain parameters, a posteriori, on the samples stored at the European Conservatory of Soils. The cartograms have not been created with the actual coordinates of the sampling devices, in accordance with the legal framework currently in force and to meet our commitment to anonymisation of data. The dataset provided together with these cartograms will include the coordinates of the center of the mesh, called centroid coordinates or theoretical coordinates. A metadata table associated with the dataset (accessible via the links below) details for each parameter represented, the method of analysis, the unit, the detection threshold and the analytical uncertainty associated with the analysis provided by the LAS.土壤质量测量网络（RMQS）是一项国家级长期土壤质量评估与监测计划。该网络基于2240个代表法国各类土壤及其土地利用类型的监测点位构建，点位按照16公里边长的系统网格布设，覆盖法国全境（本土及海外领地）。这些点位涵盖多种土地利用类型：大田作物种植区、永久草地、森林、葡萄园与果园、低人类干扰环境以及城市公园。各监测点位每约15年开展一次土壤物理、化学与生物学特性的测定。此类分析同步开展土壤特性时空变异影响因素的研究，包括生物物理变量、污染源、土地利用历史及田间管理措施等。法国本土首轮监测活动于2000年至2009年开展，本次监测以土壤污染为重点，首次绘制了28项核心土壤参数的空间分布图，同时完成了12种全量或部分提取态金属痕量元素（ETMs）以及70种持久性有机污染物的含量制图。本次监测活动中各点位的所有采样方案、测定及观测细节均收录于《2006年土壤质量测量网络手册》。 数据获取方式： 本次生成的土壤空间分布图基于RMQS首轮监测（2000-2009年）中2146个本土监测点位的分析结果，这些点位分布于2146个网格单元内。分析样品采自耕作层土壤，采用两层采样方案：其一为0-30cm土层（耕作土壤的耕作层，称为表层混合样，即复合样1），其二为下方至50cm的土层，称为亚表层混合样（即复合样2）。每份混合样由400平方米采样区内按照分层随机采样方案采集的25份单点样品混合而成（详细方案参见《2006年RMQS手册》）。对于森林或草地样点，若采样区的有机土层（对应土壤OF层与OH层）厚度足够（至少1cm）且分布连续，则可增设第三层采样，采集有机土层混合样。 本次首轮监测（2000-2009年）生成的土壤空间分布图，是对RMQS各监测点位实测参数的实际含量（以风干土质量计的浓度单位）的地理空间可视化表达。本次监测期间（2002年至2011年，随网络布设进度推进），土壤分析工作由阿拉斯法国国家农业研究院（INRA）土壤分析实验室完成；部分参数的分析则为后续补测，采用保存于欧洲土壤标本库的样品进行。 根据现行法律法规及数据匿名化承诺，本次土壤空间分布图未采用采样点的实际坐标进行绘制。随土壤空间分布图一同提供的数据集将包含网格中心点坐标，即质心坐标或理论坐标。 与数据集配套的元数据表（可通过下方链接获取）详细列出了各表征参数的分析方法、计量单位、检出限以及由LAS提供的分析不确定度。