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1. New Hampshire Soil Sensor Network: Air Temperature, Soil Temperature, Soil Water Content, and Soil Electrical Conductivity, 2012 - ongoing

   https://doi.org/10.6073/pasta/9f31b023820f207979e9c07275d0a84e  

   Contosta, Alexandra R; Frey, Serita D; Perry, Apryl (January 2024, Environmental Data Initiative)

   The goal of the New Hampshire Soil Sensor Network is to examine spatial and temporal changes in soil properties and processes as the climate changes. Data collected can also calibrate and validate models that examine how ecosystems may respond to changing climate and land use. To determine how soil processes are affected by climate change and land management, this soil sensor network measures snow depth, air temperature, soil temperature, soil volumetric water content, and soil electrical conductivity, as well as soil CO2 fluxes. This data package includes data from the air temperature, soil temperature, soil volumetric water content, and electrical conductivity sensors. Data were collected at the following sites: BRT = Bartlett Experimental Forest, Bartlett, NH; BDF = Burley-Demmerit Farm, Lee, NH; DCF = Dowst Cate Forest, Deerfield, NH; HUB = Hubbard Brook Experimental Forest, Woodstock, NH; SBM = Saddleback Mountain, Deerfield, NH; THF = Thompson Farm, Durham, NH; and Trout Pond Brook, Strafford, NH. 

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2. New Hampshire Soil Sensor Network: Soil CO2 Fluxes

   https://doi.org/10.6073/pasta/14e1189b2e8ce9bbea8766fd1c6a61ed  

   Contosta, Alexandra R; Frey, Serita D; Perry, Apryl; Varner, Ruth (July 2025, Environmental Data Initiative)

   The goal of the New Hampshire Soil Sensor Network is to examine spatial and temporal changes in soil properties and processes as the climate changes. Data collected can also calibrate and validate models that examine how ecosystems may respond to changing climate and land use. To determine how soil processes are affected by climate change and land management, this soil sensor network measures snow depth, air temperature, soil temperature, soil volumetric water content, and soil electrical conductivity, as well as soil CO2 fluxes. This data package includes air temperature, soil temperature at 5 cm, and soil volumetric water content at 5 cm, and soil CO2 flux at the time of sampling, as well as gap-filled soil CO2 fluxes using non-linear least squares regression. Data were collected at the following sites: BRT = Bartlett Experimental Forest, Bartlett, NH; BDF = Burley-Demmerit Farm, Lee, NH; DCF = Dowst Cate Forest, Deerfield, NH; HUB = Hubbard Brook Experimental Forest, Woodstock, NH; SBM = Saddleback Mountain, Deerfield, NH; THF = Thompson Farm, Durham, NH; and Trout Pond Brook, Strafford, NH. 

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3. Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Salt Exchangeable Cation Extractions from Hubbard Brook and Bartlett sites

   https://doi.org/10.6073/pasta/aa7390cf35b58b8c6ae8f292db54753d  

   Walsh, Griffin E (January 2025, Environmental Data Initiative)

   Soil element concentrations (Na, Mg, K, Ca, Al, Mn, Fe, Si, Sr, and Ba) were measured in salt exchangeable extracts of soil samples taken in July 2017 in the MELNHE study, specifically in Bartlett stands C1-C9 and Hubbard Brook stands HBM and HBO. Additional detail on the MELNHE project, including a datatable of site descriptions and a pdf file with the project description and diagram of plot configuration can be found in this data package: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344. Additional analysis data on these samples can be found in the dataset "Soil properties in the MELNHE study at Hubbard Brook Experimental Forest, Bartlett Experimental Forest and Jeffers Brook, central NH USA, 2009 - present" (https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=165). This work is a contribution of the Hubbard Brook Ecosystem Study. Hubbard Brook is part of the LTER network, which is supported by the US National Science Foundation. The Hubbard Brook Experimental Forest is operated and maintained by the US Department of Agriculture, Forest Service, Northern Research Station. 

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4. Multiple Element Limitation in Northeast Hardwood Ecosystems (MELNHE): Salt Exchangeable Cation Extractions from Hubbard Brook and Bartlett sites

   https://doi.org/10.6073/pasta/02e2764efb408a8b66b7f486eac14dc0  

   Walsh, Griffin E (January 2022, Environmental Data Initiative)

   {"Abstract":["Soil element concentrations (Na, Mg, K, Ca, Al, Mn, Fe, Si, Sr, and\n Ba) were measured in salt exchangeable extracts of soil samples taken\n in July 2017 in the MELNHE study, specifically in Bartlett stands\n C1-C9 and Hubbard Brook stands HBM and HBO.\n\n \n Additional detail on the MELNHE project, including a datatable of site\n descriptions and a pdf file with the project description and diagram\n of plot configuration can be found in this data package:\n https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=344.\n\n \n Additional analysis data on these samples can be found in the dataset\n "Soil properties in the MELNHE study at Hubbard Brook\n Experimental Forest, Bartlett Experimental Forest and Jeffers Brook,\n central NH USA, 2009 - present"\n (https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-hbr&identifier=165).\n\n \n This work is a contribution of the Hubbard Brook Ecosystem Study.\n Hubbard Brook is part of the LTER network, which is supported by the\n US National Science Foundation. The Hubbard Brook Experimental Forest\n is operated and maintained by the US Department of Agriculture, Forest\n Service, Northern Research Station."]} 

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5. Hubbard Brook Experimental Forest: Weekly Snow and Frost Measurements, 1955 - present

   https://doi.org/10.6073/pasta/f448b4b563d3f59b2058291459ce5926  

   USDA Forest Service, Northern Research (January 2021, Environmental Data Initiative)

   Snow and frost measurements have been collected approximately weekly during the winter season at the Hubbard Brook Experimental Forest using transects underneath the forest canopy adjacent to the established network of standard rain gages from 1956 to the present. Maximum snow depth, snow water content, frost occurrence, and frost depth data are recorded at points along a transect known as a snow course, which includes 10 points spaced at 2-m intervals within a designated 0.25 ha area. Data from one course are averaged for each collection date. These data were gathered at the Hubbard Brook Experimental Forest in Thornton, NH, which is operated and maintained by the USDA Forest Service, Northern Research Station. 

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