/* DATA DESCRIPTION: Citation: Yousavich, David; Diamond, Charles; Hung, Caroline; Vetushko, George; Peng, Xuefeng; Lyons, Timothy W; Treude, Tina (2026): Salton Sea 2020-2023 Sediment Geochemistry and Sulfate Reduction Rates [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996717 (DOI registration in progress) Abstract: The following dataset includes sediment geochemistry and sulfate reduction 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 three sampling campaigns (June 2021, August 2021, April 2022). Water column samples were collected with either a Niskin bottle (2020-2022) or a peristaltic pump (2023) and sediment samples were collected with a large bore sediment sampler. 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: LATITUDE: 33.260000 * LONGITUDE: -115.740000 DATE/TIME START: 2021-06-20T00:00:00 * DATE/TIME END: 2022-04-13T00:00:00 MINIMUM DEPTH, sediment/rock: 0.5 m * MAXIMUM DEPTH, sediment/rock: 29.0 m Event(s): SaltonSea_Apr22 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2022-04-13T00:00:00 SaltonSea_Aug21 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2021-08-24T00:00:00 SaltonSea_Jun21 * LATITUDE: 33.260000 * LONGITUDE: -115.740000 * DATE/TIME: 2021-06-20T00:00:00 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, sediment/rock [m] (Depth sed) * GEOCODE * 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) Nitrate, porewater [µmol/l] ([NO3]- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Nitrite, porewater [µmol/l] ([NO2]- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Ammonium, porewater [µmol/l] ([NH4]+ pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Phosphate, porewater [µmol/l] ([PO4]3- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Iron, porewater [µmol/l] (Fe2+ pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Sulfide, porewater [µmol/l] (S2- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Spectrophotometer Shimadzu UV-1800 Sulfate, porewater [µmol/l] ([SO4]2- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Ion chromatograph, Metrohm, Compact IC 761 Chloride, porewater [µmol/l] (Cl- pw) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Ion chromatograph, Metrohm, Compact IC 761 Porosity [%] (Poros) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Dried at 60 °C Carbon, organic, total [%] (TOC) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Elemental analyzer, Costech ECS 4010 Carbon, total [%] (TC) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Elemental analyzer, Costech ECS 4010 Nitrogen, total [%] (TN) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Elemental analyzer, Costech ECS 4010 Sulfur, total [%] (TS) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Elemental analyzer, Costech ECS 4010 Sulfate reduction rate [nmol/cm**3/day] (SRR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Sediment; replicate 1 Sulfate reduction rate [nmol/cm**3/day] (SRR) * PI: Yousavich, David (https://orcid.org/0000-0002-3420-9019, yousavdj@ucla.edu) * METHOD/DEVICE: Liquid scintillation counter (Tri-Carb 2910TR, Perkin-Elmer) * COMMENT: Sediment; replicate 2 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: 302 data points */ Event Sample label Latitude Longitude Depth sed [m] Date/Time [NO3]- pw [µmol/l] (Spectrophotometer Shimadzu UV...) [NO2]- pw [µmol/l] (Spectrophotometer Shimadzu UV...) [NH4]+ pw [µmol/l] (Spectrophotometer Shimadzu UV...) [PO4]3- pw [µmol/l] (Spectrophotometer Shimadzu UV...) Fe2+ pw [µmol/l] (Spectrophotometer Shimadzu UV...) S2- pw [µmol/l] (Spectrophotometer Shimadzu UV...) [SO4]2- pw [µmol/l] (Ion chromatograph, Metrohm, C...) Cl- pw [µmol/l] (Ion chromatograph, Metrohm, C...) Poros [%] (Dried at 60 °C) TOC [%] (Elemental analyzer, Costech E...) TC [%] (Elemental analyzer, Costech E...) TN [%] (Elemental analyzer, Costech E...) TS [%] (Elemental analyzer, Costech E...) SRR [nmol/cm**3/day] (Sediment; replicate 1, Liquid...) SRR [nmol/cm**3/day] (Sediment; replicate 2, Liquid...) SaltonSea_Jun21 Sed062021 33.26 -115.74 1.0 2021-06-20 3.85 0.49 SaltonSea_Jun21 Sed062021 33.26 -115.74 2.0 2021-06-20 3.93 0.36 SaltonSea_Jun21 Sed062021 33.26 -115.74 3.0 2021-06-20 3.76 0.40 SaltonSea_Jun21 Sed062021 33.26 -115.74 4.0 2021-06-20 5.58 0.53 SaltonSea_Jun21 Sed062021 33.26 -115.74 5.0 2021-06-20 7.60 0.78 SaltonSea_Jun21 Sed062021 33.26 -115.74 6.0 2021-06-20 2.99 0.33 SaltonSea_Jun21 Sed062021 33.26 -115.74 7.0 2021-06-20 6.54 0.68 SaltonSea_Jun21 Sed062021 33.26 -115.74 8.0 2021-06-20 5.91 0.80 SaltonSea_Jun21 Sed062021 33.26 -115.74 9.0 2021-06-20 5.31 0.63 SaltonSea_Jun21 Sed062021 33.26 -115.74 10.0 2021-06-20 4.04 0.45 SaltonSea_Jun21 Sed062021 33.26 -115.74 11.0 2021-06-20 4.59 0.47 SaltonSea_Jun21 Sed062021 33.26 -115.74 13.0 2021-06-20 4.42 0.43 SaltonSea_Jun21 Sed062021 33.26 -115.74 15.0 2021-06-20 3.46 0.34 SaltonSea_Jun21 Sed062021 33.26 -115.74 17.0 2021-06-20 3.84 0.33 SaltonSea_Jun21 Sed062021 33.26 -115.74 18.0 2021-06-20 2.39 0.25 SaltonSea_Jun21 Sed062021 33.26 -115.74 19.0 2021-06-20 3.20 0.29 SaltonSea_Jun21 Sed062021 33.26 -115.74 20.0 2021-06-20 1.42 0.10 SaltonSea_Jun21 Sed062021 33.26 -115.74 21.0 2021-06-20 1.51 0.17 SaltonSea_Jun21 Sed062021 33.26 -115.74 22.0 2021-06-20 1.60 0.17 SaltonSea_Jun21 Sed062021 33.26 -115.74 23.0 2021-06-20 1.70 0.19 SaltonSea_Jun21 Sed062021 33.26 -115.74 25.0 2021-06-20 1.48 0.16 SaltonSea_Jun21 Sed062021 33.26 -115.74 26.0 2021-06-20 1.64 0.17 SaltonSea_Jun21 Sed062021 33.26 -115.74 27.0 2021-06-20 1.69 0.18 SaltonSea_Jun21 Sed062021 33.26 -115.74 28.0 2021-06-20 1.57 0.17 SaltonSea_Jun21 Sed062021 33.26 -115.74 29.0 2021-06-20 2.10 0.23 SaltonSea_Aug21 Sed082021 33.26 -115.74 0.5 2021-08-24 0.4 6.9 40.7 5.9 9.7 6.9 165.5 762.1 107.9 96.1 SaltonSea_Aug21 Sed082021 33.26 -115.74 1.0 2021-08-24 SaltonSea_Aug21 Sed082021 33.26 -115.74 1.5 2021-08-24 0.0 0.1 87.4 7.3 7.8 4.6 152.5 795.1 23.7 51.7 SaltonSea_Aug21 Sed082021 33.26 -115.74 2.0 2021-08-24 0.60 SaltonSea_Aug21 Sed082021 33.26 -115.74 2.5 2021-08-24 0.0 0.0 112.0 9.8 7.8 69.8 155.0 750.1 68.7 87.4 SaltonSea_Aug21 Sed082021 33.26 -115.74 3.0 2021-08-24 0.86 SaltonSea_Aug21 Sed082021 33.26 -115.74 3.5 2021-08-24 1.4 0.0 116.7 12.6 9.7 45.8 143.1 692.8 29.7 43.3 SaltonSea_Aug21 Sed082021 33.26 -115.74 4.0 2021-08-24 0.65 SaltonSea_Aug21 Sed082021 33.26 -115.74 4.5 2021-08-24 2.0 0.0 192.1 15.8 14.4 41.9 137.1 761.0 19.2 54.1 SaltonSea_Aug21 Sed082021 33.26 -115.74 5.0 2021-08-24 0.68 SaltonSea_Aug21 Sed082021 33.26 -115.74 5.5 2021-08-24 0.0 0.0 192.1 14.7 6.0 28.7 132.0 685.3 14.2 19.0 SaltonSea_Aug21 Sed082021 33.26 -115.74 6.0 2021-08-24 0.66 SaltonSea_Aug21 Sed082021 33.26 -115.74 6.5 2021-08-24 1.7 0.0 212.1 16.5 11.6 64.4 135.1 790.4 18.0 11.8 SaltonSea_Aug21 Sed082021 33.26 -115.74 7.0 2021-08-24 0.75 SaltonSea_Aug21 Sed082021 33.26 -115.74 7.5 2021-08-24 0.0 0.0 16.3 28.3 129.5 758.6 14.3 8.7 SaltonSea_Aug21 Sed082021 33.26 -115.74 8.0 2021-08-24 0.71 SaltonSea_Aug21 Sed082021 33.26 -115.74 8.5 2021-08-24 0.0 0.0 17.2 16.7 102.8 640.0 21.4 13.9 SaltonSea_Aug21 Sed082021 33.26 -115.74 9.0 2021-08-24 0.83 SaltonSea_Aug21 Sed082021 33.26 -115.74 9.5 2021-08-24 2.4 0.0 17.0 11.9 103.0 673.9 7.0 4.7 SaltonSea_Aug21 Sed082021 33.26 -115.74 10.0 2021-08-24 0.51 SaltonSea_Aug21 Sed082021 33.26 -115.74 10.5 2021-08-24 0.0 0.0 290.2 16.3 94.5 7.3 112.2 746.7 25.4 13.3 SaltonSea_Aug21 Sed082021 33.26 -115.74 11.0 2021-08-24 0.78 SaltonSea_Aug21 Sed082021 33.26 -115.74 11.5 2021-08-24 0.0 0.0 304.2 13.1 27.4 1.9 101.2 719.4 21.4 6.1 SaltonSea_Aug21 Sed082021 33.26 -115.74 12.0 2021-08-24 0.77 SaltonSea_Aug21 Sed082021 33.26 -115.74 12.5 2021-08-24 9.7 0.0 317.5 6.6 99.6 1.5 112.7 798.7 14.8 8.7 SaltonSea_Aug21 Sed082021 33.26 -115.74 13.0 2021-08-24 0.72 SaltonSea_Aug21 Sed082021 33.26 -115.74 13.5 2021-08-24 0.0 0.0 330.9 4.6 0.0 1.6 103.7 748.5 7.5 6.4 SaltonSea_Aug21 Sed082021 33.26 -115.74 14.0 2021-08-24 0.58 SaltonSea_Aug21 Sed082021 33.26 -115.74 14.5 2021-08-24 4.4 13.5 SaltonSea_Aug21 Sed082021 33.26 -115.74 15.0 2021-08-24 0.82 SaltonSea_Aug21 Sed082021 33.26 -115.74 15.5 2021-08-24 5.6 4.9 SaltonSea_Aug21 Sed082021 33.26 -115.74 16.0 2021-08-24 0.71 SaltonSea_Aug21 Sed082021 33.26 -115.74 16.5 2021-08-24 4.0 3.3 SaltonSea_Aug21 Sed082021 33.26 -115.74 17.0 2021-08-24 0.65 SaltonSea_Aug21 Sed082021 33.26 -115.74 17.5 2021-08-24 4.3 1.1 SaltonSea_Aug21 Sed082021 33.26 -115.74 18.0 2021-08-24 0.71 SaltonSea_Aug21 Sed082021 33.26 -115.74 19.0 2021-08-24 0.53 SaltonSea_Apr22 Sed042022 33.26 -115.74 1.0 2022-04-13 4.48 8.51 SaltonSea_Apr22 Sed042022 33.26 -115.74 3.0 2022-04-13 5.54 9.28 SaltonSea_Apr22 Sed042022 33.26 -115.74 5.0 2022-04-13 7.62 4.29 SaltonSea_Apr22 Sed042022 33.26 -115.74 7.0 2022-04-13 6.27 2.10 SaltonSea_Apr22 Sed042022 33.26 -115.74 9.0 2022-04-13 5.54 1.41 SaltonSea_Apr22 Sed042022 33.26 -115.74 10.0 2022-04-13 5.58 1.67 SaltonSea_Apr22 Sed042022 33.26 -115.74 12.0 2022-04-13 3.89 1.50 SaltonSea_Apr22 Sed042022 33.26 -115.74 14.0 2022-04-13 3.97 1.49 SaltonSea_Apr22 Sed042022 33.26 -115.74 16.0 2022-04-13 2.45 1.36 SaltonSea_Apr22 Sed042022 33.26 -115.74 17.0 2022-04-13 3.58 1.79