Fire risk values, analysed — Download service

In the decision support system Fire Risk Forest and Land, fire risk forecasts are calculated and meteorological data are reported to support decisions on fire in vegetation. Once the forecast has ended, a new calculation of the fire risk values is made based on the latest available weather data. This “analysis data” is stored. After each year’s fire season, the analysed historical dataset of the model-calculated boxes of 2.8 km * 2.8 km is saved with the midpoint given in x and y coordinates. Please note that the WMS service only contains the previous year’s data. Each 2.8 km * 2.8 km square has the attributes listed below (some variation may occur from year to year): ID: Internal MSB Task Puncture: Internal MSB task for unique grid box. The data was added in 2015, before there was no value. Time: It was used until 2014 to indicate the date of statistical values. As of 2015, dates will be stored in the “Date” field. Temp: Temperature in degrees Celsius 2 m above ground at 12 UTC according to the calculation model for the current grid. RH: Relative humidity expressed in % 2 m above the ground at 12 UTC according to the calculation model for the current grid grid. Wind speed: Wind speed in m/s (medium wind) 10 m above the ground at 12 UTC according to the calculation model for the current grid pane. Downstairs: Precipitation current day 18 UTC-18 UTC the previous day according to the calculation model for the current grid grid. FFMC: Fine Fuel Moisture Code represents the humidity of leaves and grass. The maximum water storage in this layer is less than 1 mm. Included in the FWI model. DMC: The Duff Moisture Code represents the humidity in a slightly deeper layer than the most superficial in the FWI model, e.g. moss and the upper part of the humus layer. The storage in this layer corresponds to about 15 mm of water. DC: The Drought Code shows the moisture content of thick compact humus layers (about 100 mm water). DC is part of the FWI model. ISI: The initial spread index. A measure of the rate of spread of the fire. An index used to calculate an FWI. Calculated from FFMC and reinforced by wind speed. BUI: Buildup index. Can be seen as a general measure of humidity for the slightly deeper soil layers. An index value used to calculate a fire risk value, FWI. Weighted average of DMC and DC. FWI: Fire Weather Index. Fire risk value calculated from ISI and BUI, which in turn are based on three basic values for moisture content in different layers (FFMC, DMC and DC). The input to the calculation is the daily rainfall as well as temperature, relative humidity and wind speed in the middle of the day. FWI index: Index of spread risk and fire behaviour in forest land. Based on the basic value FWI (see above). Currently divided into six different index levels (1, 2, 3, 4, 5, 5E) where index 1 is the lowest risk and index 5E is the highest risk. Fuel dehydration: Index values for the dehydration of the fuel and the lower layers of soil that are most important for a forest fire. Currently divided into six different index levels (1, 2, 3, 4, 5, 5E) where index 1 is the lowest risk and index 5E is the highest risk. Medium: Daily average temperature 2 m above ground according to SMHI calculation model for the current grid grid. RN: Dispersion rate in m/min for fire in uncut, unclaimed last year weeds. GFI: Fire risk levels for grass fires, the following indications are used: Very large grass fire risk (6) High Grass Fire risk (5) Moderate grass fire risk (4) Small grass fire risk (3) End of Grass Fire Season (2) Snow — Snow-covered land (1) Data missing/Not season (-1) Wind direction: Wind direction in degrees from where the wind comes from (division 360 degrees, 180 degrees equivalent to southern wind) at 12 UTC according to the calculation model for the current grid pane. E: The east-west position (centre) of the grid pane specified in SWEREF 99 TM. NOTE: prior to 2015, this information was entered in box ‘y’. N: The north-south position of the grid (centre point) specified in SWEREF99 TM. NOTE: prior to 2015, this information was entered in box “x”. Municipality: The commune code of the municipality within which the coordinate in the fields “E” and “N” is located.森林与土地火灾风险决策支持系统（Fire Risk Forest and Land）中，系统会计算火灾风险预报并上报气象数据，以支撑植被火情相关决策。单次预报任务结束后，系统将基于最新可用气象数据重新计算火灾风险值，并将该"分析数据"进行存储。每年火灾季结束后，系统会将模型计算生成的2.8千米×2.8千米网格的历史分析数据集进行存档，该数据集以x、y坐标标注网格中心点位置。请注意，WMS服务仅包含上一年度的相关数据。 每个2.8千米×2.8千米的网格均包含以下属性字段（各年度字段可能存在小幅差异）： ID：内部MSB任务 Puncture：用于唯一标识网格的内部MSB任务字段。该字段自2015年起新增，此前无对应数值。 Time：该字段用于2014年及之前的统计值日期标注，2015年起，日期信息将存储至"Date"字段。 Temp：当前网格计算模型输出的、12 UTC时离地2米处的气温，单位为摄氏度。 RH：当前网格计算模型输出的、12 UTC时离地2米处的相对湿度，单位为%。 Wind speed：当前网格计算模型输出的、12 UTC时离地10米处的风速，单位为米/秒（常规风速）。 Downstairs：当前网格计算模型输出的、当日18 UTC至前日18 UTC时段的累计降水量。 FFMC（Fine Fuel Moisture Code）：细燃料湿度码，用于表征叶片与草甸的湿度，该层最大持水量小于1毫米，为火天气指数（FWI）模型的输入参数之一。 DMC（Duff Moisture Code）：腐殖层湿度码，用于表征FWI模型中除最表层外的深层植被湿度，例如苔藓与腐殖质上层，该层持水量约为15毫米。 DC（Drought Code）：干旱码，用于表征致密厚层腐殖质的湿度（持水量约100毫米），为FWI模型的输入参数之一。 ISI（Initial Spread Index）：初始蔓延指数，用于表征火灾蔓延速率，为FWI的计算索引之一，由FFMC结合风速计算得出。 BUI（Buildup Index）：累积指数，可作为深层土壤湿度的通用表征指标，用于计算火灾风险值FWI，为DMC与DC的加权平均值。 FWI（Fire Weather Index）：火天气指数，为火灾风险值，由ISI与BUI计算得出；而ISI与BUI又基于不同植被层的三项基础湿度指标（FFMC、DMC与DC），计算输入参数包括当日降水量、正午气温、相对湿度与风速。 FWI指数：林地火灾蔓延风险与火灾行为表征指数，基于前述FWI基础值计算得出。当前共分为6个风险等级（1、2、3、4、5、5E），其中等级1代表最低风险，5E代表最高风险。 Fuel dehydration：表征森林火灾关键影响因子——燃料与浅层土壤干燥程度的指数，当前共分为6个风险等级（1、2、3、4、5、5E），等级1为最低风险，5E为最高风险。 Medium：当前网格SMHI计算模型输出的、离地2米处的日平均气温。 RN：未砍伐、上一年度未清理的杂草区域的火灾蔓延速率，单位为米/分钟。 GFI：草原火灾风险等级，采用以下标注： 6：极高草原火灾风险 5：高草原火灾风险 4：中等草原火灾风险 3：低草原火灾风险 2：草原火灾季结束 1：积雪——地表被积雪覆盖 -1：数据缺失/非火灾季 Wind direction：当前网格计算模型输出的、12 UTC时的风向，以风的来向角度表示（360度分度，180度对应南风）。 E：以SWEREF 99 TM坐标系标注的网格单元中心点东西向坐标。注意：2015年之前，该信息存储于"y"字段中。 N：以SWEREF 99 TM坐标系标注的网格中心点南北向坐标。注意：2015年之前，该信息存储于"x"字段中。 Municipality："E"与"N"字段坐标所归属的市镇编码。