http://bolin.su.se/data/heffernan-2024-doc-1 Liam Heffernan, Dolly N. Kothawala, Lars J. Tranvik Bolin Centre Database 2024 Datafile Terrestrial Soil Permafrost carbon Dissolved organic carbon Permafrost soils Systematic review Earth science > Land surface > Soils > Permafrost Liam Heffernan 2024-01-30T14:31:14+00:00 English 1 The data is provided in a spreadsheet (`xlsx` file) containing two sheets, listed below. 1. `READ ME` contains descriptions of all column headers and data. It provides units of measurement for each and explains nomenclature used throughout the dataset. 2. `data` contains 3,346 data entries over 133 columns. The primary data here are dissolved organic carbon concentrations extracted from 111 studies. Each entry contains a reference number, reference to the publication, DOI, site coordinates (latitude and longitude), and a number of site descriptors. It also contains ~60 other biogeochemical parameters that were extracted along with DOC concentrations. | Column_Name | Variable_Name | Units_Info | |---|---|---| | NUM | Study number | - | | Reference | Reference | - | | DOI | Study DOI | - | | Lat | Latitude | Decimal Degrees | | Long | Longitude | Decimal Degrees | | EcoRegion | Ecoclimatic regions as define by Olson et al. 2001 | CB,SB,ST,AT | | Permafrost Zone | Permafrost region where the study took place. Determined by mapping the cooridnates over Brown et al. (1997) permafrost cover map | N,S,D,C | | PfConA | Permafrost Present | Y/N | | PfTh | Permafrost Thaw Present | Y/N | | Site | Site Name | - | | SiteID | Shortened SiteID | - | | Country | Country | - | | ID | Measurement location ID | - | | Ecosystem | Ecosystem Classification | | | SiteDescrip | Site Description | - | | MicroL | Micro-landscape feature | - | | Disturb | Is there study site pristine or disturbed? | P/D | | Disturb.Type | Type of disturbance | F, ALT, TT, TA | | YSD | Years since disturbance | - | | Incub.Days | Number of daysd incubation experimanet ran for | - | | Therm.Type | Type of thermokasrt feature sampled | TB, TF, TSt, TP, TS, ALD, G, ALT, E | | ShoulderSeason | Shoulder Season | Y/N | | Seas | Season/s | T, S, F, W | | Year.P | Publication Year | year | | Year.S | Measurement year/s | year | | SampleDays | Sampling Days | Days | | Month.Numbers | Number of months that sampling took place over | Months | | SampMonths | Sampling Months | - | | MonthCode | Code used for assigning months | A, B, C, D, E, F, G, H, I, H, K, L, M, N, O | | Meth | Method used for sampling | W/S | | Extraction | Extraction method used to obtain sample | Grab, Rhizon (shaking), K2SO4 (shaking), Rhizon, GW well, Piezometer, Shaken, Ice.Core, Centrifuged, Pump, Lysimeter, D.Leached, Leached, Dialysis | | Filter | Filter size used | uM | | DOC.meth.broad | Method used to measure DOC | Shimadzu, Technicon, Aiken, OI, FIA, Dichromate, Sulphochromic, Multi, Crystals | | SUVA.meth | Method used to measure SUVA | Weisshar | | Frozen.Samples | Was filtrate frozen prior to analysis | Yes/No | | Acidifeid.Samples | Was filtrate acidified prior to analysis | Yes/No | | Occ | Occasions | Sampling measurements | | N | Sample number | Number of samples | | GrowSL | Growing Season Length | Days | | Elev | Elevation | m asl | | MAAT | Mean annual air temperature at site | °C | | MAP | Mean annual precipitation | mm | | TPer | Air Temperature | °C | | Runoff | Annual runoff | mm year⁻¹ | | Catch.Type | Catchment classification | L/U | | Catch.Size | Catchment size | km² | | SpefDis.water | Specific discharge of water | mm | | SpefDis.DOC | Specific discharge of dissolved organic carbon | g m⁻² | | SpefDis.POC | Specific discharge of Particulate organic carbon | g m⁻² | | DOC.export | Export rate of dissolved organic carbon per year | g C m⁻² yr⁻¹ | | DOC.flux | Flux rate of dissolved organic carbon | g C m⁻² day⁻¹ | | Depth | Depth of water/soil sample | cm | | Sample.Type | Field based sample of laboratory based sample | F, L, FM | | Manip.Type | Type of experimental manipulation that has been used on sample | T, PR, W, Th | | Soil.Class | Soil taxonomy | - | | Soil.Type | Organic or mineral | O/M | | Soil.Horiz | Organic or mineral | O/M/I | | TSoilA | Surface Soil Temperature | °C | | IncubTemp | Incubation soil temperature | °C | | Incub.Combustion.Temp | Temperature sample was heated to for exeriment | °C | | Twater | Water Temperature | °C | | WTAv | Water Table Average | cm | | SoilMoist | Soil Moisture | % | | SoilMoistCon | Soil Moisture Depth | cm | | Incub.state | Soil moisture content | g kg⁻¹ | | Org | Organic Layer Depth | cm | | Thaw | Thaw Depth | cm | | ActiveLayer | Active layer depth | cm | | ThermHoriz | Thermal horizon of soil sample | V, AL, P, PF, W, TS | | BD | Bulk density of soil | g cm⁻³ | | Soil.C | Soil C of sample | g C kg⁻¹ | | Soil.N | Soil N of sample | g N kg⁻¹ | | C/N | Soil C:N ratio | - | | 13Csoil | Soil 13 C | ‰ | | C.Stock | Soil organic carbon stock | kg C m⁻² | | N.stock | Soil organic nitrogenitrogen stock | kg N m⁻² | | pH | pH of water/soil sample | - | | EC | Electrical conductivity | uS cm⁻¹ | | DOC | dissolved organic carbon volumetric concentration | mg L⁻¹ | | DOC.m | dissolved organic carbon volumetric concentration median | mg L⁻¹ | | POC | Particulate organic carbon concentration | mg L⁻¹ | | DIC | DIC concentration | mg L⁻¹ | | BDOC.v | dissolved organic carbon loss | mg L⁻¹ | | BDOC.m | dissolved organic carbon loss | mg C kg⁻¹ soil⁻¹ day⁻¹ | | BDOC | Biodegradable dissolved organic carbon | % | | T.BDOC | Time over which Bdissolved organic carbon is lost | - | | 13C-DOC | d13C-dissolved organic carbon composition | ‰ | | SUVA254 | Specific ultraviolet absbronace at 254 nm | L mg C⁻¹ m⁻¹ | | a250/a365 | Absorption ratio | - | | a254 | Absrobtion at 254 nm | m⁻¹ | | a300 | Absrobtion at 300 nm | m⁻¹ | | a350 | Absrobtion at 350 nm | m⁻¹ | | a440(CDOM) | CDOM absroption at 440 nm | m⁻¹ | | S275-295 | Spectral slope between 275-295 nm | nm⁻¹ | | S350-400 | Spectral slope between 350-400 nm | nm⁻¹ | | Emmax | Emission wavelength of maximum fluorescence of peak of C | nm⁻¹ | | Fmmax/A340 | Ratio of peak C intensity (QSE) (Fmax) to the absorption coefficient atr A340 | QSE m | | A340 | Absrobtion at 340 nm | m⁻¹ | | Sr | Spectral slope coefficient | - | | E2:E3 | E2:E3 ratio | - | | TDN.v | Total dissolved nitrogen | mg L⁻¹ | | DIN.v | Dissolved inorganic nitrogen | mg L⁻¹ | | DON.v | Dissolved organic nitrogen | mg L⁻¹ | | TDP | Total dissoved phosphorus | mg L⁻¹ | | DOC:DON | dissolved organic carbon:dissolved organic nitrogen ratio | - | | NO3 | Nitrate concentraion | mg L⁻¹ | | NH43 | Ammonium concentration | mg L⁻¹ | | NO2 | Nitrogen oxide concentraion | μg NO2- g⁻¹ soil dry weight | | PO4 | Phosphate concentration | mg L⁻¹ | | SO4 | Sulphate concentration | mg L⁻¹ | | Cl | Chloride concentration | mg L⁻¹ | | Ca2 | Calcium ion concentraion | mg L⁻¹ | | Si | Silicone | mg L⁻¹ | | HCO3 | Bicarbonate | mg L⁻¹ | | Na | Sodium | mg L⁻¹ | | K | Potassium | mg L⁻¹ | | Mg | Magnesium | mg L⁻¹ | | Al | Aluminuium | mg L⁻¹ | | Fe | Iron | mg L⁻¹ | | Cu | Copper | mg L⁻¹ | | Acetate | Acetate concentration | mg L⁻¹ | | Formate | Formate concentration | mg L⁻¹ | | Oxalate | Oxalate concentration | mg L⁻¹ | | dD | Deuterium istope | ‰ | | d18O | Oxygen stable isotope | ‰ | | disCO2 | Dissolved CO2 | ppmv | | disCH4 | Dissolved CH4 | ppmv | | CO2.flux.m2 | Soil CO2 efflux | µmol m⁻² s⁻¹ | | CO2.flux.soil | Soil CO2 efflux | mg CO2 g soil C⁻¹ days | | CH4.flux.soil | Soil CH4 efflux | mg CH4 g soil C⁻¹ days | | FI | Fluorescence index | - | | BIX | Freshness index | - | | HIX | Humifcation index | - |