Radiocarbon content of CO2, CH4, DOC and particulate organic carbon from the northern permafrost region

1. 14C_Dataset_Final_Submitted.xlsx

1. Dataset: Gas (CO2, CH4) vs Water (DOC, POC).
2. Study: Author et al
3. ID_merged: ID of study
4. Full_class: Broad classification combining ecosystem and/or disturbance and/or site/region
5. General_ecosystem: Ecosystem type [Tundra, Forest, Peat, River]
6. Yedoma: [Yes/No]
7. LAR: Large Arctic Rivers (refers to Kolyma, Lena, Yenisey, Ob, Mackenzie and Yukon rivers and data is mostly derived from the AGROdataset: http://www.arcticgreatrivers.org/data.html) [Yes/No]
8. PF: Permafrost region [Yes/No]
9. Thermokarst: Thermokarst landscapes basically refer to thermokarst lakes, thermokarst peatlands, and thaw slumps in the Kolyma region [Yes/No]
10. Grouped_Data_source:The most important categories for the Gas dataset (CO2 and CH4) are Flux, Bubbles, Soil porespace and Incub. For the Water dataset (DOC, POC), the classification needs to be combined with other columns for more detailed information (Data_source, Grouped_Tributary_type, Tributary_type, Tributary; a combination of all is in Network_origin); important categories are MainStem, Tributary, SoilDOC and Glacial.
11. Data_source: See comment in Grouped_Data_source
12. Grouped_Tributary_type: See comment in Grouped_Data_source
13. Tributary_type: See comment in Grouped_Data_source
14. Tributary: See comment in Grouped_Data_source
15. Network_origin: Mixed classification for water dataset to account for different type of sources and spatial distribution in the river network
16. Data_source_comments: Specific comments
17. MainRiver_name: River Name
18. Specific_ecosystem: Specific comments
19. Basin_Area_Drainage_Area_km2: When reported, For water dataset [km2]
20. Flux_type: Important to distinguish between CO2 and CH4 and to distinguish between Autotrophic, Heterotrophic, Ecosystem respiration for CO2. Water export refers mostly to the Water dataset
21. Depth_cm: depth of sampling with probes for Soil porespace data (category in Grouped_Data_source column) and to lake depth for the lakes, when reported (category in General_ecosystem). If there is soil porespace data overlapped with lake data, depth refers to Soil porespace data. [cm]
22. Aerob_anaerob_incub: Oxic vs anoxic conditions in incubations
23. Org_Min_Incub: Organic or mineral soils in incubations
24. Autotrophic_type: Type of sample for autotrophic incubations [Above/Below ground]
25. Manipulation_study: Applies to Gas dataset. warming/drying/wetting manipulations
26. Manipulation: Applies to Gas dataset - Manipulation treatment
27. Specific_location: Applies to Gas dataset - Info on sampling location, it could be combined with next column (Measurement unit). IMPORTANT: Measurements in study "Estop-Aragones CYCLOPS" and study "Cooper et al 2017" showing "BOTTOM" in this column may want to be excluded since they come from collars sealed at the base (i.e. soil in a "bucket") and thus do not represent respiration from the entire profile (refer to original publications: https://www.sciencedirect.com/science/article/pii/S0038071717306892 and https://www.nature.com/articles/nclimate3328?foxtrotcallback=true)
28. Measurement_unit: Applies to Gas dataset - See comment in Specific_location
29. More_description: Applies to Gas dataset - Comments
30. AL_cm: Active Layer Depth [cm]
31. Sampling_year_fraction: Calculated using day, month and year and used to convert 14C data to Fraction modern units
32. Sampling_date: Date when reported
33. Day: Day
34. Month: Month
35. Year: Year
36. DOY: Julian Day
37. Month_name: Name of month
38. Gral_description: General info for Gas dataset
39. Sampling_method: For Gas dataset
40. Sample_treatment: For Gas dataset
41. WT_cm: Water Table [cm]
42. Latitude_decimal_degrees: Latitude [°N]
43. Longitude_decimal_degrees: Longitude [°E]
44. Coordinates_comments: Comments on accuracy of coordinates
45. Station: For water dataset; refers to the name/location of stations for Large Arctic Rivers
46. Instantaneous_discharge_m3_per_s: Water discharge [m3 s-1]
47. Specific_discharge_m3_per_s_per_km2: Calculated using drainage area [m3 s-1 km-2]
48. Runoff_mm_per_day: Runoff [mm day-1]
49. d18O_permil: δ ¹⁸O of water samples [‰]
50. d13C_Soil: δ¹³C [‰]
51. d13C_Atm_CO2: δ¹³C-CO2 [‰]
52. d13C_CO2: δ¹³C-CO2 [‰]
53. d13C_CH4: δ¹³C-CH4 [‰]
54. H_CH4: deuterium-CH4 [‰]
55. H_H2O: deuterium-H2O [‰]
56. d13C_DOC: δ¹³C - Dissolved Organic Carbon [‰]
57. d13C_POC: δ¹³C - Particulate Organic Carbon [‰]
58. DOC_mgC_L: Dissolved Organic Carbon Concentration [mg C L-1]
59. POC_mgC_L: Particulate Organic Carbon Concentration [mg C L-1]
60. TOC_mgC_L: Total Organic Carbon Concentration [mg C L-1]
61. Fm_Soil: Fraction modern [%]
62. Fm_Atm_CO2: Fraction modern [%]
63. Fm_CO2: Fraction modern [%]
64. Fm_CH4: Fraction modern [%]
65. Fm_DOC: Fraction modern [%]
66. Fm_POC: Fraction modern [%]
67. Detailed_ecosystem_classification: Additional information

Estop-Aragonés, C., Olefeldt, D., Abbott, B. W., Chanton, J. P., Czimczik, C. I., Dean, J. F., et al. (2020). Assessing the potential for mobilization of old soil carbon after permafrost thaw: A synthesis of 14C measurements from the northern permafrost region. Global Biogeochemical Cycles, 34, e2020GB006672. https://doi.org/10.1029/2020GB006672