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1. WES01 Woody encroachment impacts on the subsurface at Konza Prairie

   https://doi.org/10.6073/pasta/021e88c3cff578848acb6fc074577d77  

   Sullivan, Pamela; Jarecke, Karla (January 2024, Environmental Data Initiative)

   Soil sampling pits across three hillslope positions - toeslope, backslope, and summit - were dug in 2020 in watershed N4D (burned every 4 years) and N1D (burned annually) to characterize the impacts of woody encroachment on subsurface soil physical, chemical, and biological properties. Pits were hand-dug to 120 cm in the toeslope position and to 60 cm deep at the backslope and summit positions. Soil pits in N4D were dug directly under dogwood shrubs (Cornus drumondii) while pits in N1B were dug under grasses and forbs. Soil pit faces were photographed to determine root fractions with depth,  soil monoliths were take to charaterize soil macroporosity with depth while soil cores were taken in each horizon for water retention analysis.  Soil sensors were also installed at four soil depths at the toeslope position and 3 soil depths at the backslope and summit positions to record half hourly soil moisture, soil temperature, soil water potential, soil electrical conductivity, and soil carbon dioxide, and soil oxygen. In addition, geophysical measurements were taken in N4D using time-lapse electrical resistivity in 2023. 

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2. Hubbard Brook Experimental Forest: 239+240Pu isotopes activities and inventories along slopes in WS3 and WS5, 2021-2022

   https://doi.org/10.6073/pasta/ac2d9c170baa1fec5d124bc3fbebb332  

   Portes, Raquel; Bailey, Scott W (August 2026, Environmental Data Initiative)

   This dataset presents 239+240Pu isotopes activities (Bq/kg), inventories (Bq/m²), 240Pu/239Pu atomic ratios, and bulk densities from soil samples collected along slope positions (shoulder, upper backslope, mid-backslope, and toeslope) in Watershed 3 (reference watershed) and Watershed 5 (whole-tree harvested in 1983–1984) in 2021 and 2022. These samples were collected to compare Pu isotope depth profiles between the reference and harvested watersheds to quantify soil erosion and deposition rates. Five replicate pedons at each slope position in both watersheds were excavated and collected, spaced 2–5 meters apart. In Watershed 5, former skid road sites used during whole-tree harvesting were avoided. Samples were collected at 5 cm increments from 0 to 35 cm depth using a volumetric corer. Two soil cores were taken from each depth increment within the soil pit and bulked. Pu isotope analyses were performed at Northern Arizona University using a Thermo X Series II quadrupole ICP-MS equipped with a high-efficiency desolvating nebulizer system (APEX HF), following protocols according to Ketterer et al. (2004) and Portes et al. (2024). Bulk density (g/cm³) was calculated by dividing the dry weight of the soil core (<2 mm) by the volume of the soil core. Rock fragments were not considered in the bulk density calculations. Ketterer, M.E., Hafer, K.M., Link, C.L., Kolwaite, D., Wilson, J., Mietelski, J.W., 2004. Resolving Chernobyl vs. global fallout contributions in soils from Poland using Plutonium atom ratios measured by inductively coupled plasma mass spectrometry. J. Environ. Radioact. 183–201. Portes, R., Spinola, D., Ketterer, M.E., Egli, M., Lybrand, R.A., Fedenko, J., Biles, F., Trainor, T.P., Dere, A., 2024. Assessing decadal soil redistribution rates using 239+240Pu across diverse lithologies in Southeast Alaska 1659–1677. 

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3. SOS: Snow Pit Data. Version 1.0

   https://doi.org/10.26023/f9rz-s4kh-y60j  

   Hogan, D; Schwat, E; Lundquist, J; Gutmann, E; Vano, J (January 2023, NSF NCAR Earth Observing Laboratory)

   Snow Pit data acquired from manual snow pits following protocols and symbology from the International Classification for Snow on the Ground (see document attached titled IntClassificationSnowOnGround.pdf) collected during the Sublimation of Snow (SOS) field project. Snow pits were dug approximately every 24 to 48 hours from 6 January to 16 March 2023. The main measurements taken from each snow pit included total snow depth, surface temperature, snow temperature (every 10 cm), snow density (10 cm average), snow crystal size, snow crystal type, and layer hardness. See the readme file for more detail. 

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4. Hubbard Brook Experimental Forest: Soil Profiles (Pedons), 1995-2022

   https://doi.org/10.6073/pasta/e413be5a20ef9cf5344c7d7855a71c70  

   Bailey, Scott W (January 2024, Environmental Data Initiative)

   This dataset documents all pedons (soil profiles) that have been located with GPS (2 meter horizontal accuracy) and have been described by genetic horizon for the Hubbard Brook Experimental Forest, within the White Mountain National Forest, NH. Soil profiles were observed between 1995 and 2022 and have been described and sampled at two levels of detail. Soil profiles in the pedon table were dug to bedrock or into the C horizon except where high boulder content limited excavation. The depth of all major soil horizons was measured and most pedons had descriptions written and physical samples collected. The horizon table contains physical observations and chemical analyses for the horizons sampled in the pedon table. Over 2500 of these horizons have had physical samples accessioned into the Hubbard Brook sample archive; the archived mass is included in the horizon table. The reconnaissance table includes pedons observed at a lower level of detail. Small pits were generally dug to a depth of 40 cm or greater, and minimal observations, as needed, were recorded to classify the soil profile by soil map unit (hpu). These data were collected to supplement the detailed observations in the previous two data tables in support of development of a spatial model of soil distribution for the entire Hubbard Brook Experimental Forest. No samples were collected from reconnaissance pits. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. 

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5. Air, soil, and lake water temperatures of the Eastern Canadian Arctic (2017-2021)

   https://doi.org/10.18739/a22f7js2t  

   Raberg, Jonathan; De_Wet, Gregory; Crump, Sarah; Raynolds, Martha; Sepúlveda, Julio; Miller, Gifford (January 2022, NSF Arctic Data Center)

   Temperature loggers (Thermochron DS1922L or DS1925L ibuttons, Maxim Integrated Products) were used to record air, soil, and lake water temperatures at 1- to 6-hour intervals and 0.0625° Celsius (C) resolution. Air temperature loggers were positioned beneath heat shields and mounted at 2 meters (m) above the ground surface. Soil temperature loggers were double wrapped in plastic bags (Whirlpak), placed inside plastic containers (PolyCon), sealed with electrical tape, and buried at 10 centimeter (cm) depth. Water temperature loggers were similarly double wrapped, placed inside 50 milliliter (mL) plastic containers (Nalgene or Falcon), sealed with electrical tape, and suspended at known depths in the lake. A subset of this data was spline interpolated and published previously at https://arcticdata.io/catalog/view/doi:10.18739/A2GX44W0N. 

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