/* DATA DESCRIPTION: Citation: Yousavich, David; Diamond, Charles; Hung, Caroline; Vetushko, George; Peng, Xuefeng; Lyons, Timothy W; Treude, Tina (2026): Salton Sea 2020-2023 Water Column Microbial Metabolic Rates [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996715 (DOI registration in progress) Abstract: The following dataset includes water column microbial metabolic rates for the Salton Sea, a rapidly drying inland lake in California's Coachella Valley. These measurements were conducted to assess how rapid desiccation, a similar phenomenon happening to inland lakes globally, is affecting biogeochemical cycling in the lake (Yousavich et al., 2026). All measurements were conducted between 2020 and 2023, with samples collected aboard a small boat during four sampling campaigns (January 2020, August 2020, September 2021, and November 2023). Water column samples were collected with either a Niskin bottle (2020-2022) or a peristaltic pump (2023). Methane oxidation and denitrification rates were only measured in samples from the 2023 campaign. Keyword(s): Geochemistry; Lake; sulfate reduction rates Related to: Yousavich, David; Diamond, Charles; Hung, Caroline; Vetushko, George; Peng, Xuefeng; Lyons, Timothy W; Treude, Tina (2026): Biogeochemical processes in a rapidly drying inland lake, the Salton Sea. Journal of Great Lakes Research, 102884, https://doi.org/10.1016/j.jglr.2026.102884 Funding: National Aeronautics and Space Administration (NASA) (URI: http://www.nasa.gov/), grant/award no. 80NSSC21K0594: Alternative Earths – How to Build and Sustain a Detectable Biosphere (URI: https://science.nasa.gov/astrobiology/researchers/funded-research/icar/) Coverage: MEDIAN LATITUDE: 33.296000 * MEDIAN LONGITUDE: -115.784000 * SOUTH-BOUND LATITUDE: 33.260000 * WEST-BOUND LONGITUDE: -115.960000 * NORTH-BOUND LATITUDE: 33.440000 * EAST-BOUND LONGITUDE: -115.740000 DATE/TIME START: 2020-01-08T00:00:00 * DATE/TIME END: 2023-11-16T00:00:00 MINIMUM DEPTH, water: 1.0 m * MAXIMUM DEPTH, water: 10.5 m Event(s): SaltonSea_Aug20 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2020-08-11T00:00:00 SaltonSea_Jan20 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2020-01-08T00:00:00 SaltonSea_Nov23 * LATITUDE: 33.440000 * LONGITUDE: -115.960000 * DATE/TIME: 2023-11-16T00:00:00 SaltonSea_Sep21 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2021-09-22T00:00:00 Parameter(s): Event label (Event) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) Sample code/label (Sample label) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) LATITUDE (Latitude) * GEOCODE * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) LONGITUDE (Longitude) * GEOCODE * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) DEPTH, water [m] (Depth water) * GEOCODE * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Calculated average/mean values Depth, water, top/minimum [m] (Depth water top) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) Depth, water, bottom/maximum [m] (Depth water bot) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) DATE/TIME (Date/Time) * GEOCODE * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 1; water column Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 2; water column Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 3; water column Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 4; water column Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 5; water column Sulfate, reduction rate [nmol/l/day] ([SO4]2- RR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 6; water column Methane, oxydation rate [nmol/l/day] (CH4 OR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 1; water column Methane, oxydation rate [nmol/l/day] (CH4 OR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 2; water column Methane, oxydation rate [nmol/l/day] (CH4 OR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Replicate 3; water column Denitrification rate [µmol/l/day] (Denitrifi) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: GasBench+PreCon trace gas concentration system (ThermoFinnigan) coupled to a DELTA V plus IRMS * COMMENT: Water column License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) Size: 73 data points */ Event Sample label Latitude Longitude Depth water [m] (Calculated average/mean values) Depth water top [m] Depth water bot [m] Date/Time [SO4]2- RR [nmol/l/day] (Replicate 1; water column, Li...) [SO4]2- RR [nmol/l/day] (Replicate 2; water column, Li...) [SO4]2- RR [nmol/l/day] (Replicate 3; water column, Li...) [SO4]2- RR [nmol/l/day] (Replicate 4; water column, Li...) [SO4]2- RR [nmol/l/day] (Replicate 5; water column, Li...) [SO4]2- RR [nmol/l/day] (Replicate 6; water column, Li...) CH4 OR [nmol/l/day] (Replicate 1; water column, Li...) CH4 OR [nmol/l/day] (Replicate 2; water column, Li...) CH4 OR [nmol/l/day] (Replicate 3; water column, Li...) Denitrifi [µmol/l/day] (Water column, GasBench+PreCon...) SaltonSea_Jan20 Niskin012020 33.26 -115.74 1.0 0 10.5 2020-01-08 2.1 0.0 SaltonSea_Jan20 Niskin012020 33.26 -115.74 10.5 0 10.5 2020-01-08 0.0 43.6 468.5 SaltonSea_Aug20 Niskin082020 33.26 -115.74 1.0 0 10.5 2020-08-11 20.1 0.9 7.8 SaltonSea_Aug20 Niskin082020 33.26 -115.74 7.0 0 10.5 2020-08-11 5.3 37.2 1.6 SaltonSea_Aug20 Niskin082020 33.26 -115.74 10.5 0 10.5 2020-08-11 296.0 397.0 375.0 SaltonSea_Sep21 Niskin092021 33.26 -115.74 1.0 0 10.5 2021-09-22 405.8 248.5 1283.8 SaltonSea_Sep21 Niskin092021 33.26 -115.74 7.0 0 10.5 2021-09-22 494.9 384.0 16.8 494.0 SaltonSea_Sep21 Niskin092021 33.26 -115.74 10.5 0 10.5 2021-09-22 339.2 814.8 1124.8 2047.6 2204.4 SaltonSea_Nov23 Pump112023 33.44 -115.96 1.0 0 10.5 2023-11-16 39.7 37.7 3.5 17.0 0.096 0.086 0.128 SaltonSea_Nov23 Pump112023 33.44 -115.96 10.5 0 10.5 2023-11-16 80.0 19.7 19.0 179.9 32.0 86.0 0.149 0.213 0.161 12.5