Soil temperatures under ponderosa pines, Jeffrey pines, sugar pines and giant sequoias during prescribed burns

In 1988, a study was initiated to measure soil temperatures of mature sugar pines and giant sequoias in Sequoia-Kings Canyon National Parks, California, during prescribed burns. The purpose was to investigate tree mortality observed after fire was reintroduced into sequoia groves. This work expanded to other National Park Service and USDA Forest Service locations in California to measure soil temperatures under large ponderosa and Jeffrey pines. These additional sites include Yosemite National Park, Eldorado National Forest, Blacks Mountain Experimental Forest in Lassen National Forest, San Bernardino National Forest, and Toiyabe National Forest. This data publication contains the hourly temperatures of heated soil measured with Type K sheathed thermocouples at various depths below the O2-A1 soil subhorizon interface during prescribed burns between 1988 and 2003. Also included are the linear depths of organic material (forest floor) above the temperature probe site pre-fire and the amount of fuel consumption measured post-fire; fuel moisture content (dry weight basis) of the litter, fermentation, and humus layers measured pre-fire; and soil moisture content (dry weight basis) measured pre- and post-fire at the depth of the thermocouples. The soil moisture, fuel moisture and forest floor depth data are linked to the temperature data by the SOIL_ID variable. The dates of collection for the other measurements corresponds to the date that soil temperature measurement commenced.The purpose of these studies was to determine the extent of heating in the soil under the canopies of mature conifers during prescribed fires.

自1988年起，一项研究在加利福尼亚州 Sequoia-Kings Canyon 国家公园对成熟糖松和巨型红杉的土壤温度进行了测量，该研究旨在通过规划燃烧来研究火灾重新引入红杉林后观察到的树木死亡率。该研究随后扩展至加利福尼亚州其他国家公园管理局和美国农业部森林管理局的地点，以测量大型火炬松和杰弗里松的土壤温度。这些额外的地点包括约塞米蒂国家公园、埃尔多拉多国家森林、拉森国家森林中的布莱克斯山实验森林、圣贝纳迪诺国家森林以及托伊亚贝国家森林。本数据出版物包含了1988年至2003年期间规划燃烧期间，使用K型铠装热电偶在不同深度下测量加热土壤的每小时温度。此外，还包括了火灾前温度探头位置上方有机物质（森林地面）的线性深度以及火灾后的燃料消耗量；火灾前落叶、腐殖质和腐殖层的燃料含水量（以干重为基础）；以及热电偶深度处火灾前后土壤含水量（以干重为基础）的测量。土壤水分、燃料水分和森林地面深度数据通过SOIL_ID变量与温度数据相联系。其他测量的收集日期与土壤温度测量开始日期相一致。这些研究的目的是确定成熟针叶林冠下规划火灾期间土壤加热的程度。