uid=nlany,o=EDI,dc=edirepository,dc=org all public read Stephen D Sebestyen USDA Forest Service, Northern Research Station stephen.sebestyen@usda.gov https://orcid.org/0000-0002-6315-0108 Nina K Lany USDA Forest Service, Northern Research Station nina.lany@usda.gov https://orcid.org/0000-0003-0868-266X John T Larson USDA Forest Service, Northern Research Station john.larson@usda.gov Nathan A Aspelin USDA Forest Service, Northern Research Station nathan.a.aspelin@usda.gov Keith C Oleheiser XCEL Engineering Doris K Nelson USDA Forest Service, Northern Research Station Richard L Kyllander USDA Forest Service, Northern Research Station Randall K Kolka USDA Forest Service, Northern Research Station randall.k.kolka@usda.gov https://orcid.org/0000-0002-6419-8218 Carrie Dorrance USDA Forest Service, Northern Research Station, retired Associated Party Anne Gapinski University of Minnesota Associated Party 2021-02-03 This data set reports the chemistry of surface and porewater water from the Bog Lake peatland in the Marcell Experimental Forest (MEF) in Itasca County, Minnesota, which is operated and maintained by the USDA Forest Service, Northern Research Station. Surface water has been collected about every other week since 2007 from a pool of water and sampling is ongoing. Once covered with ice, water was typically sampled once a month. Porewaters at five depths (0 to 2 m depths) have been collected about monthly from three different nest of piezometers since 2013, though never when samplers were frozen. Samples are measured for pH, specific conductivity, anions (chloride, sulfate), cations (calcium, magnesium, potassium, sodium, aluminum, iron, manganese, strontium), silicon, nutrients (ammonium, nitrate, soluble reactive phosphorus, total nitrogen, total phosphorus), and total organic carbon. hydrology peatland bogs fens wetland isotopes water chemistry chemistry specific conductivity LTER Controlled Vocabulary Ecology, Ecosystems, & Environment Natural Resource Management & Use Inventory, Monitoring, & Analysis National Research & Development Taxonomy inlandWaters ISO 19115 Topic Category Marcell Experimental Forest Minnesota MEF MEF Vocabulary This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you. Marcell Experimental Forest -93.5 -93.45 47.57 47.5 Bog Lake piezometer nest 1 (BL1) -93.489122 -93.489122 47.50525 47.50525 Bog Lake piezometer nest 2 (BL2) -93.4893930078 -93.4893930078 47.5050246229 47.5050246229 Bog Lake piezometer nest 3 (BL3) -93.4894900404 -93.4894900404 47.5049342426 47.5049342426 Bog Lake open pool for water sampling -93.489063 -93.489063 47.504928 47.504928 2007-01-11 2019-10-28 ongoing Data Manager, Marcell Experimental Forest nina.lany@usda.gov This data set includes the chemistry of peatland surface and pore waters collected at the Bog Lake peatland at the Marcell Experimental Forest (MEF) in Itasca County, Minnesota. Surface water has been collected about every other week since 2007 from a pool of water and sampling is ongoing. Once covered with ice, water was typically sampled once a month. Porewaters at five depths (0 to 2 m depths) have been collected about monthly from three different nest of piezometers since 2013, though never when samplers were frozen (typically November through May). Samples are measured for pH, specific conductivity, anions (chloride, sulfate), cations (calcium, magnesium, potassium, sodium, aluminum, iron, manganese, strontium), silicon, nutrients (ammonium, nitrate, soluble reactive phosphorus, total nitrogen, total phosphorus), and total organic carbon. The Bog Lake peatland is a site with a legacy of methane emissions studies (Dise et al. 2011 ) as well as long-term monitoring of water level, soil temperature, and meteorology. Bog Lake is the site of an eddy covariance tower and has been measuring water vapor exchanges and carbon dioxide emissions since 2006, methane emissions since 2009, and is part of the AmeriFlux Network. The MEF is operated and maintained by the USDA Forest Service, Northern Research Station. SITE DESCRIPTION: The Bog Lake peatland is a 44-ha, poor fen (a mean pH of 4.1 between 1991 and 2019). The peatland is covered with leatherleaf (Chamaedaphne calyculata), bog laurel (Kalmia polifolia), Sphagnum mosses, blue flag iris (Iris versicolor), manna grass (Glyceria species), bog rosemary (Andromeda glaucophylla), beak rush (Rhynchospora alba), arrow grass (Scheuchzeria palustris), and sparse, short (under 3 m) tamarack (Larix laricina). Pitcher plants (Sarracenia purpurea) grow across the peatland. A small lake (7 ha), encircled by mature black spruce (Picea mariana), remains at the north end of the infilling glacially-scoured depression. In the area with instrumentation for ecosystem monitoring, the peat is 1 to 4 m deep along an east-west transect across the fen. The peat, a Greenwood series organic soil (Dysic, frigid Typic Haplohemists; Nyberg 1987 ), has accumulated in the last 10,000 y since Wisconsin glaciation (Verry & Janssens 2011 ). The peat has hummock and hollow microtropography. Hummocks are uneven, elevated areas that rise various heights, up to about 50 cm, above the adjacent hollows, which have a relatively uniform elevation within a localized area. Throughout the fen, there are lawn areas, which are more expansive, plateau-like areas with a relatively uniform peat elevation. The piezometers, used to sample porewater, were all placed in hollows. The adjacent uplands have fine-textured mineral soils (Warba-Menahga complex) that formed in glacial till. The Warba-Menahga complex is small intermixed patches of the Warba (an Alfisol; Fine-loamy, mixed, superactive, frigid Haplic Glossudalfs) and the Menagha (an Entisol; mixed, frigid, Typic Udipsamment) series soils (Nyberg 1987). The uplands have aspen (Populus tremuloides, P. balsamea, and P. grandidentata), birch (Betula papyrifera), red pine (Pinus resinosa), and jack pine (Pinus banksiana) forest cover. The climate is continental with warm summers, cold winters, and an average air temperature since 1961 of 3.4 deg C (1961 to 2011, Sebestyen et al. 2011 ). Mean precipitation since 1961 is 78 cm. Most precipitation occurs as rainfall during summer and a winter snowpack accumulates from December to March or April when the snowpack melts. Water in the peatland originates from precipitation and subsurface exchange with a surrounding aquifer in a glacial outwash sand that blankets the entire area to a depth of about 50 m. There are no known perennial channelized inputs or outflows of surface water. The peatland water table fluctuates from about 0.20 m above the surface to 0.20 m below. LOCATIONS OF WATER SAMPLING: Surface water is collected from an open pool of water that is about 16 m south of the main boardwalk, which is used to access infrastructure and instruments at the Bog Lake Peatland. The open pool is also several m into the fen from the east edge of the adjacent uplands. The pool of water was excavated (origin is unknown) and open pools of water like this are not a feature elsewhere in the peatland, aside from the previously mentioned lake. A treated lumber boardwalk is used in the peatland to access the pool for sampling. These surface water samples are labelled as Bog Lake. Three nests of piezometers were installed in the Bog Lake peatland during August 2013 and first sampled during October 2013. The piezometer nests are roughly aligned on a north-south transect and the three nests are named BL1 (northmost), BL2 (middle), and BL3 (southmost). Two of the piezometer nests are south of the Bog Lake monitoring equipment (i.e., for water level, soil temperature, meteorological, and trace gas emission measurement). The BL1 piezometer nest is north of that infrastructure. Piezometers were installed along boardwalks (untreated lumber before August 2019 and treated lumber thereafter) for access, to prevent peat compaction, and to eliminate trampling of the peat near and around the piezometers during installation and sampling. Piezometers were made from 5-cm (2 inch) internal-diameter (ID) PVC pipe. Piezometers were screened (a hacksaw slot every 1 cm) over 10-cm intervals. A cap was secured (friction fit) to the bottom of each piezometer. In each piezometer nest, the top of the screened interval was placed at 0, 30, 50, 100 cm below the hollow surface. One deeper piezometer was installed during spring 2014, at either 185 (BL1 or BL2) or 200 cm (BL3), depending on the peat depth at a particular piezometer nest. Piezometers were pushed or hammered into peat. Piezometers placed in peat need to be deeply anchored to prevent toppling in the unconsolidated and saturated surficial peat and frost heaving during winter. For those reasons, each piezometer had at least 1.5-m of pipe below the peat surface, such that the 0 cm depth piezometers, for example, had about 140 cm of pipe beneath the screen that served as a reservoir to accumulate and hold water. Piezometers were aligned along the boardwalk, with no more than 10 to 15 cm between any adjacent pair of piezometers within a nest. Piezometers were developed by scrubbing with a bottle brush, then pumped of all water over successive days until no particles were observed in the evacuated water. In subsequent years, if particular piezometers yielded peat particles when pumped, that piezometer would have been similarly re-developed. A piece of 0.6-cm (1/4 inch) ID PVC tubing, reaching to the bottom, was placed inside each piezometer. That 0.6-cm PVC remained inside a particular sampler and was attached via a flexible silicone hose to a portable, manual bellows pump (various Guzzler 400 series pumps, The Bosworth Co., East Providence, Rhode Island) for purging or a peristaltic pump (Cole Parmer, Vernon Hills, Illinois, Masterflex PSF/CRS easy-load pump head mounted to a Dewalt, Townson, Maryland portable drill) for sample collection. Piezometers were loosely capped when not being sampled and vented with an approx. 1 mm (1/8 inch) hole, immediately below the cap. WATER SAMPLING: Unfiltered surface water was ladled into a new, 250-mL low density polyethylene (LDPE) bottle for pH, specific conductivity, ion, and nutrient analyses every 1 to 2 weeks when the sampling pool was not ice covered (unfrozen), sometimes monthly when frozen, and occasionally not at all when ice covered. If sampled under ice cover, the ice layer was broken or a hole was augured to access water. All water in a piezometer was evacuated immediately before to a day prior to sampling. Samplers usually refilled within minutes. At least 3 volumes of the tubing volume (or 5-20 s of pumping) were purged prior to filling bottles to clean tubing between samples. Unfiltered pore water was pumped directly in to a 250-ml LDPE bottle. An aliquot of most samples was collected in a 16-mL scintillation vial with a Polyseal cap for liquid water isotope analysis (stored at room temperature). Scintillation vials for water isotope samples were completely filled, with no headspace or bubbles. For all samples collected during and after 2019, a separate 60-mL aliquot was saved in a new, HDPE bottle solely for nutrient (nitrate, ammonium, total nitrogen, and total phosphorus analyses) analyses. Sample bottles and vials were triple rinsed with sample water before filling. When collected, date/time of retrieval, sample location, and associated notes were recorded on field data sheets. A unique serial ID number was assigned to all aliquots of the same sample for tracking purposes in the laboratory and data reporting. Sample ID numbers are 6 digit integers. The Bog Lake peatland samples IDs are not necessarily consecutive because water from other sites at the MEF are interspersed in the numbering series. Surface water samples were labelled as BOG LAKE and porewaters were labelled by piezometer nest (BL1, BL2, or BL2) and the corresponding depth as a three character integer for a depth in cm (i.e., 000, 030, 050, 100, and 185 or 200). Samples were transported on ice in a cooler and frozen upon return to the Grand Rapids chemistry laboratory, where refrigerated (250-mL bottles), frozen (60-mL bottles for nutrient analysis), or stored at room temp (isotope vials) until analyzed. ANALYTICAL METHODS: Water samples were analyzed for pH, specific conductivity, and concentrations of cations, anions, nutrients, and total organic carbon at the Forestry Science Laboratory in Grand Rapids, Minnesota. Unfiltered water was used for all laboratory analyses. It is important to keep in mind that porewater and surface waters in peatlands are free of inorganic particulates due to flowpaths through peat and slow transit times due to low hydraulic gradients that allow for deposition of particulates. For that reason, we have considered our unfiltered water samples of surface and peatland porewaters to be dissolved. The samples are likely to include colloids, but no inorganic particulates and rarely peat particles. Attempts are made to avoid or eliminate aquatic organisms (mostly mosquito larvae during late spring when abundant) or plant leaves and needles (after senescence). For each type of laboratory measurement, every tenth sample was run in duplicate followed by two reference standards. Analytical duplicates and the 10 preceding samples were acceptable for reporting when the relative error was less than 10 percent between duplicates. Unless otherwise noted, autosamplers were used with instruments for analysis. For anion, cation, nutrient, and TOC analyses, check and reference solutions were made in volumetric flasks with deionized water (18.0 megaohm/cm). When check standards differed by more than 5% from actual values, a batch of samples was reanalyzed. When a particular sample was higher in concentration than the highest calibration standard, that sample was diluted and re-run until within the range of the calibration standards. pH: A Mettler Toledo (Columbus, OH) DL53 Autotitrator was used to measure pH according to Standard Method 4500-H+ B (APHA 2017). A four-point calibration was performed before each batch of 15 samples. A sodium carbonate reference was run after every ten samples. Samples were only analyzed if the reference values were accurate to within 10 percent and pH is reported to the nearest tenth of a decimal place. Samples for pH analysis typically were analyzed within days of collection. Although rare, samples sometimes were held for weeks to several months while awaiting maintenance on the analyzers. Specific conductivity: Conductivity was measured on a Yellow Springs Instruments (YSI; Yellow Spring, Ohio) Model 3100 meter. A YSI 3403 probe (cell constant = 1.0/cm) was used until March 2017 and a YSI 3253 probe (cell constant = 1.0/cm) thereafter. The meters were calibrated with a 46.7 microSiemen/cm standard, and periodically checked with 23.8, 84.0, or 150 microSiemen/cm references. The manually loaded cell of the conductivity probe was twice rinsed and then conductivity was measured on the third poured aliquot. Samples, the standard, and reference standards were measured at room temperature and in a laboratory maintained at 21 degree C. Conductivity values were recorded on paper. Specific conductivity (conductivity at 25 degree C) was calculated from conductivity (at 21 degree C) when values were transferred to spreadsheets. Specific conductivity (conductivity at 25 degree C) was calculated from conductivity (at 21 degree C) when values were transferred to spreadsheets. Samples for conductivity measurement typically were analyzed within days of collection. Although rare, samples sometimes were held for weeks to several months while awaiting maintenance on the analyzers. Anions: Anion (chloride and sulfate) concentrations were measured using suppressed conductivity and conductimetric detection on two different ion chromatographs: on a Dionex (Sunnyvale, CA) DX-500 for samples collected through 2012 and a Thermo Scientific Dionex ICS-2100 thereafter. Samples were injected through 20 micrometer filter caps and through an IonPac AG14 pre-column and AS14 column (DX500) and AG22 pre-column and AS22 column (ICS-2100). Standard Method 4110-C was used (APHA 2017). The ion chromatograph was typically operated every business day. Daily throughput of samples is lower than the rate at which samples are sometimes collected. For that reason, samples for anion measurement were sometimes analyzed within several days of collection, but oftentimes held for months to a year before analysis. Cations and silicon: Cation (calcium, magnesium, potassium, sodium, aluminum, iron, manganese, and strontium) and silicon concentrations were analyzed by inductively coupled optical emission spectroscopy (ICP-OES). A Thermo Electron Corporation (Waltham, Massachusetts) Iris Intrepid ICP-OES was for all samples collected through 2015, and a Thermo Scientific (Waltham, Massachusetts) ICAP 7600 Duo for samples collected during and after 2016. Standard method 3120 (APHA 2017) was used. Calcium, iron, magnesium, potassium, sodium were measured for all samples. Aluminum, manganese, silicon, and strontium analyses were added during 2009. Samples for cation analyses were typically run one to four times a year in large batches of samples; analysis occurred within several days of collection for some samples to a year from collection for those that were held longest. Nutrients: Ammonium was measured according to the Lachat (Milwaukee, Wisconsin) QuikChem 10-107-06-1-F method on a Lachat (Hach Company, Loveland, Colorado) QuickChem 8500 starting with samples collected during 2019. Ammonium is reported as the amount of nitrogen in ammonium. The Lachat methods are equivalent to the automated phenate method to form indephenol blue for colorimetric analysis (Standard Method 4500-NH3 H; APHA 2017). Nitrate+nitrate was measured according to Lachat QuikChem 10-107-04-1-B on a QuickChem 8500 starting with samples collected during 2019. Nitrate was reduced to nitrite using the automated cadmium reduction method and concentration was colorimetrically determined as the amount of nitrogen in the resulting nitrite (Standard Method 4500-NO3- F; APHA 2017). Through nitrite was not separately measured using this method, it has been rare in our experience to observe nitrite in MEF water samples. All samples were also analyzed by ion chromatography and nitrite peaks were not visible in sample chromatograms. Total nitrogen (TN) concentrations were measured colorimetrically after in-line automated persulfate-ultraviolet oxidation to nitrate (Standard Method 4500-N B. Concentrations were measured according to the Lachat QuikChem 10-107-04-1-P method on a Lachat QuickChem for samples collected before 2016 and Lachat QuikChem E10-107-04-3-D method on a Lachat QuickChem 8500 thereafter. Soluble reactive phosphorus was measured according to the Lachat QuikChem 10-115-01-1-B method on a Lachat QuikChem 8000 for samples collected through 2012 and Lachat QuikChem 8500 thereafter. The Lachat methods are equivalent to the automated ascorbic acid reduction method (Standard Method 4500-P F; APHA 2017). Total phosphorus (TP) concentrations were measured colorimetrically using automated persulfate-UV digestion and ascorbic acid reduction for colorimetric detection (Standard Method 4500-P; APHA 2017). Concentrations were measured according to the Lachat QuikChem 10-115-01-3-A method on a Lachat QuickChem 8000 for samples collected before 2016 and Lachat QuikChem E10-115-01-3-A method on a Lachat QuickChem 8500 thereafter. Samples for nitrogen and phosphorus chemistry were typically run once or twice a year in large batches of samples. Analysis occurred within several days of collection for some samples to a year from collection for those that were held longest. Total organic carbon (TOC): Concentrations of TOC were measured by high-temperature combustion with infrared detection (Standard Method 5310-B, APHA 1995) on a Shimadzu TOC-V CPH with External Sparge Kit for samples collected through 2012. A Shimadzu (Columbia, Maryland) TOC-VCP was used for samples collected from 2013 onward. Concentrations were measured as total carbon minus inorganic carbon (TC-IC) before June 2010 and as non-purgeable organic carbon (NPOC) after that. Potassium hydrogen phthalate (KHP) was used for reference and check standards. Sebestyen et al. (2020 ) show that the TC-IC and NPOC are comparable to within 10% relative error as a measure of TOC concentration. We consider the two instruments and methods to be equivalent for our sites. Liquid water isotopes: The glass scintillation vials for water isotope measurement are stored in a sample archive and are available for eventual analysis on a Los Gatos Research (Mountain View, California) T-LWIA-45-EP liquid water isotope analyzer at the Grand Rapids chemistry laboratory. REPORTED VALUES: To document when a sample was collected, we include a laboratory ID, sample name, and date/time of collection. Sometimes chemistry values are assigned -9999 for individual solutes or for all analytes (i.e., pH, specific conductivity, and solute concentrations), which may have resulted from insufficient sample volume to complete all analyses, contamination that affected individual solutes or suites of analytes that were simultaneously measured on a single instrument for a particular sample, or contamination that affected all solutes for a particular sample. Samples pending analysis are also assigned -9999. Concentrations of nitrate and ammonium are only reported onward from 2019 when aliquots were frozen for analysis. Values are reported as -9999 prior to preservation with freezing. Data values below the detection limit are reported in the data file and are not flagged. Detection limits, as listed above, must be considered when using these data. The method detection limits were: - 0.01 mg chlorine/L, - 0.02 mg sulfate/L, - 0.05 mg calcium/L, - 0.05 mg magnesium/L, - 0.5 mg potassium/L, - 0.1 mg sodium/L, - 0.01 mg aluminum/L, - 0.05 mg iron/L, - 0.01 mg manganese/L, - 0.05 mg silicon/L, - 0.01 mg strontium/L, - 0.01 mg nitrogen/L for ammonium, - 0.002 mg nitrogen/L for nitrate+nitrite, - 0.001 mg phosphorus/L for soluble reactive phosphorus, - 0.05 mg nitrogen/L for total nitrogen, - 0.05 mg phosphorus/L for total phosphorus, - mg carbon/L for the TC-IC method, and 0.5 mg carbon/L for the NPOC method of TOC analysis. Water isotopes values will be added to this data publication in subsequent versions as samples are analyzed. MARCELL EXPERIMENTAL FOREST sites and data collection are described in further detail in: Sebestyen, S.D., C. Dorrance, D.M. Olson, E.S. Verry, R.K. Kolka, A.E. Elling, and R. Kyllander (2011). Chapter 2: Long-Term Monitoring Sites and Trends at the Marcell Experimental Forest. In Randall K. Kolka, Stephen D. Sebestyen, Elon S. Verry, and Kenneth N. Brooks (Ed.). Peatland Biogeochemistry and Watershed Hydrology at the Marcell Experimental Forest (pp 15-71). CRC Press, Boca Raton, FL. https://www.fs.usda.gov/treesearch/pubs/37979. REFERENCES: Dise, N., Shurpali, N. J., Weishampel, P., Verma, S. B., Verry, E. S., Gorham, E., Crill, P. M., Harriss, R. C., Kelley, C. A., Yavitt, J. B., Smemo, K. A., Kolka, R. K., Smith, K., Kim, J., Clement, R. J., Arkebauer, T. J., Bartlett, K. B., Billesbach, D. P., Bridgham, S. D., Elling, A. E., Flebbe, P. A., King, J. Y., Martens, C. S., Sebacher, D. I., Williams, C. J., and Wieder, R. K. (2011), Carbon emissions from peatlands, in Peatland biogeochemistry and watershed hydrology at the Marcell Experimental Forest, edited by Kolka, R. K., et al., pp. 297-347, CRC Press, Boca Raton, FL. Nyberg, P. R. (1987), Soil survey of Itasca County, Minnesota, 197 pp, USDA Soil Conservation Service. Verry, E. S., and Janssens, J. (2011), Geology, vegetation, and hydrology of the S2 bog at the MEF: 12,000 years in northern Minnesota, in Peatland biogeochemistry and watershed hydrology at the Marcell Experimental Forest, edited by Kolka, R. K., et al., pp. 93-134, CRC Press, Boca Raton, FL. Sebestyen, S. D., Funke, M. M., Cotner, J., Larson, J. T., and Aspelin, N. A. (2020), Water chemistry data for studies of the biodegradability of dissolved organic matter in peatland catchments at the Marcell Experimental Forest: 2009-2011, 2nd edition, Updated 09 September 2020 ed., Forest Service Research Data Archive, Fort Collins, CO. https://doi.org/10.2737/RDS-2017-0067 Sebestyen, S. D., Dorrance, C., Olson, D. M., Verry, E. S., Kolka, R. K., Elling, A. E., and Kyllander, R. (2011), Long-term monitoring sites and trends at the Marcell Experimental Forest, in Peatland biogeochemistry and watershed hydrology at the Marcell Experimental Forest, edited by Kolka, R. K., et al., pp. 15-71, CRC Press, Boca Raton, FL. https://doi.org/10.1201/b10708-3 Stephen D Sebestyen USDA Forest Service, Northern Research Station stephen.sebestyen@usda.gov https://orcid.org/0000-0002-6315-0108 Principal Investigator USDA Forest Service Northern Research Station Bog Lake surface water chemistry Bog Lake surface water chemistry Bog_Lake_surface_water_chemistry.csv 35614 75e42219d6d078528273ce55b83744e6 1 \r\n column , LAB_ID consecutive ID numbers assigned to sample at the US Forest Service Forestry Science Laboratory in Grand Rapids, MN string consecutive ID numbers assigned to sample at the US Forest Service Forestry Science Laboratory in Grand Rapids, MN LOCATION sampling location string Bog Lake Bog Lake peatland DateTime date and time sample was collected in the field date YYYY-MM-DD hh:mm:ss pH pH of the water sample float dimensionless real 2.95 5.51 -9999 Data not collected, data values excluded due to contamination or instrument error, or analysis pending. SPCOND Conductivity at 25 C (i.e., specific conductivity) of the water sample. float microSiemenPerCentimeter real 8.88 238.59 -9999 Data values excluded due to contamination or instrument error, or analysis pending. CL cloride concentration of the water sample float milligramsPerLiter real 0 2.42 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SO4 sulfate concentration of the water sample float milligramsPerLiter real 0 3.77 -9999 Data values excluded due to contamination or instrument error, or analysis pending. CA calcium concentration of the water sample float milligramsPerLiter real 0.05 3.27 -9999 Data values excluded due to contamination or instrument error, or analysis pending. K potassium concentration of the water sample float milligramsPerLiter real 0 3.78 -9999 Data values excluded due to contamination or instrument error, or analysis pending. MG magnesium concentration of the water sample float milligramsPerLiter real 0 1.09 -9999 Data values excluded due to contamination or instrument error, or analysis pending. Na sodium concentration of the water sample float milligramsPerLiter real 0 1.91 -9999 Data values excluded due to contamination or instrument error, or analysis pending. AL aluminium concentration of the water sample float milligramsPerLiter real 0 1.52 -9999 Data values excluded due to contamination or instrument error, or analysis pending. FE iron concentration of the water sample float milligramsPerLiter real 0 3.88 -9999 Data values excluded due to contamination or instrument error, or analysis pending. MN manganese concentration of the water sample float milligramsPerLiter real 0 0.14 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SI silicon concentration of the water sample float milligramsPerLiter real 0 5.29 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SR strontium concentration of the water sample float milligramsPerLiter real 0 0.01 -9999 Data values excluded due to contamination or instrument error, or analysis pending. NH4 Ammonium-N concentration of the water sample float milligramsPerLiter real 0 0.02 -9999 Data values excluded due to contamination or instrument error, or analysis pending. NO3 Nitrate-N concentration of the water sample float milligramsPerLiter whole 0 0 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SRP soluble reactive phosphorus concentration of the water sample float milligramsPerLiter real 0 0.23 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TN total nitrogen concentration of the water sample float milligramsPerLiter real 0 4.06 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TP total phosphorus concentration of the water sample float milligramsPerLiter real 0 0.37 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TOC total organic carbon concentration of the water sample float milligramsPerLiter real 5.51 91.76 -9999 Data values excluded due to contamination or instrument error, or analysis pending. 270 Bog Lake piezometer chemistry Bog Lake piezometer chemistry Bog_Lake_piezometer_chemistry.csv 29373 e5b8c2b3f2dfdc5eaac161b3b97eba47 1 \r\n column , LAB_ID consecutive ID numbers assigned to sample at the US Forest Service Forestry Science Laboratory in Grand Rapids, MN string consecutive ID numbers assigned to sample at the US Forest Service Forestry Science Laboratory in Grand Rapids, MN PIEZOMETER Piezometer ID string BL1 Bog Lake piezometer nest 1 BL2 Bog Lake piezometer nest 2 BL3 Bog Lake piezometer nest 3 DEPTH depth of sample in centimeters float centimeter whole 0 200 DateTime date and time sample was collected in the field date YYYY-MM-DD hh:mm:ss pH pH of the water sample float dimensionless real 3.36 5.64 -9999 Data not collected, data values excluded due to contamination or instrument error, or analysis pending. SPCOND Conductivity at 25 C (i.e., specific conductivity) of the water sample. float microSiemenPerCentimeter real 13.36 41.84 -9999 Data values excluded due to contamination or instrument error, or analysis pending. CL cloride concentration of the water sample float milligramsPerLiter real 0 0.54 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SO4 sulfate concentration of the water sample float milligramsPerLiter real 0 1.07 -9999 Data values excluded due to contamination or instrument error, or analysis pending. CA calcium concentration of the water sample float milligramsPerLiter real 0 3.7 -9999 Data values excluded due to contamination or instrument error, or analysis pending. K potassium concentration of the water sample float milligramsPerLiter real 0 2.15 -9999 Data values excluded due to contamination or instrument error, or analysis pending. MG magnesium concentration of the water sample float milligramsPerLiter real 0 1.56 -9999 Data values excluded due to contamination or instrument error, or analysis pending. Na sodium concentration of the water sample float milligramsPerLiter real 0 1.51 -9999 Data values excluded due to contamination or instrument error, or analysis pending. AL aluminium concentration of the water sample float milligramsPerLiter real 0 0.77 -9999 Data values excluded due to contamination or instrument error, or analysis pending. FE iron concentration of the water sample float milligramsPerLiter real 0 1.99 -9999 Data values excluded due to contamination or instrument error, or analysis pending. MN manganese concentration of the water sample float milligramsPerLiter real 0 0.11 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SI silicon concentration of the water sample float milligramsPerLiter real 0 8.99 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SR strontium concentration of the water sample float milligramsPerLiter real 0 0.02 -9999 Data values excluded due to contamination or instrument error, or analysis pending. NH4 Ammonium-N concentration of the water sample float milligramsPerLiter real 0 0.1 -9999 Data values excluded due to contamination or instrument error, or analysis pending. NO3 Nitrate-N concentration of the water sample float milligramsPerLiter whole 0 0 -9999 Data values excluded due to contamination or instrument error, or analysis pending. SRP soluble reactive phosphorus concentration of the water sample float milligramsPerLiter real 0 0.11 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TN total nitrogen concentration of the water sample float milligramsPerLiter real 0.16 5.34 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TP total phosphorus concentration of the water sample float milligramsPerLiter real 0 0.5 -9999 Data values excluded due to contamination or instrument error, or analysis pending. TOC total organic carbon concentration of the water sample float milligramsPerLiter real 5.86 69.44 -9999 Data values excluded due to contamination or instrument error, or analysis pending. 222 microSiemens per centimeter