BUSCADOR RECOLECTA

Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, L & oslash;nborg et al., 2023) compiling previously published and unpublished measurements of DOC, DON, and DOP in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g. chlorophyll a, inorganic nutrients) and the inorganic carbon system (e.g. dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations of concentrations from all continents. However, most data were collected in the Northern Hemisphere, with a clear gap in DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62 338 data points for DOC, 20 356 for DON, and 13 533 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average +/- standard deviation (SD): 182 +/- 314 mu mol C L-1; median: 103 mu mol C L-1) is 13-fold higher than the average coastal DON concentration (13.6 +/- 30.4 mu mol N L-1; median: 8.0 mu mol N L-1), which is itself 39-fold higher than the average coastal DOP concentration (0.34 +/- 1.11 mu mol P L-1; median: 0.18 mu mol P L-1). This dataset will be useful for identifying global spatial and temporal patterns in DOM and will help facilitate the reuse of DOC, DON, and DOP data in studies aimed at better characterizing local biogeochemical processes; closing nutrient budgets; estimating carbon, nitrogen, and phosphorous pools; and establishing a baseline for modelling future changes in coastal waters., 1119, 1107, 13, 4,231, 11,4, Q1, Q1, SCIE, 10,6

13 pages, 4 figures, 1 table.-- Christian Lonborg et al., Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, Lønborg et al., 2023) compiling previously published and unpublished measurements of DOC, DON, and DOP in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g. chlorophyll a, inorganic nutrients) and the inorganic carbon system (e.g. dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations of concentrations from all continents. However, most data were collected in the Northern Hemisphere, with a clear gap in DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62 338 data points for DOC, 20 356 for DON, and 13 533 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average ± standard deviation (SD): 182±314 µmol C L−1; median: 103 µmol C L−1) is 13-fold higher than the average coastal DON concentration (13.6±30.4 µmol N L−1; median: 8.0 µmol N L−1), which is itself 39-fold higher than the average coastal DOP concentration (0.34±1.11 µmol P L−1; median: 0.18 µmol P L−1). This dataset will be useful for identifying global spatial and temporal patterns in DOM and will help facilitate the reuse of DOC, DON, and DOP data in studies aimed at better characterizing local biogeochemical processes; closing nutrient budgets; estimating carbon, nitrogen, and phosphorous pools; and establishing a baseline for modelling future changes in coastal waters, During the drafting of the manuscript, Christian Lønborg received funding from the Independent Research Fund Denmark (grant no. 1127-00033B). The monitoring data obtained from Bermuda received funding from the Bermuda Government Department of Environment and Natural Resources. A subset of the data obtained from UK coastal estuaries received funding from the Natural Environment Research Council (grant no. NE/N018087/1). Data retrieved from the Palmer LTER data were collected with support from the Office of Polar Programs, US National Science Foundation. Data obtained from the Great Barrier Reef Marine Monitoring Program for Inshore Water Quality, which is a partnership between the Great Barrier Reef Marine Park Authority, the Australian Institute of Marine Science, James Cook University, and the Cape York Water Partnership. The contribution by Piotr Kowalczuk was supported by DiSeDOM (project contract no. UMO-2019/33/B/ST10/01232) funded by the NCN – National Science Centre, Poland. Nicholas Ward and Allison Myers-Pigg participated in this synthesis effort with funding provided by the U.S. Department of Energy funded COMPASS-FME project; the provided data was collected with funding from the PREMIS Initiative, conducted under the Laboratory Directed Research and Development Program at Pacific Northwest National Laboratory. The data obtained from the Levantine Sea (Med Sea) received funding from the Scientific and Technological Research Council of Türkiye (TÜBİTAK, 1001 programme, grant no. 115Y629). The data obtained from Gulf of Trieste (Slovenian waters) were financed by Research Program No. P1-0237 (Slovenian Research and Innovation Agency). Data obtained from the northern Baltic Sea were financed by the research programme EcoChange (Swedish research council FORMAS). The contribution by Ding He was supported by the National Natural Science Foundation of China (grant no. 42222061) and funding support from the Center for Ocean Research in Hong Kong and Macau (CORE). CORE is a joint research centre for ocean research between Laoshan Laboratory and HKUST. The contribution by Yuan Shen was supported by National Natural Science Foundation of China (grant no. 42106040), the Fundamental Research Funds for the Central Universities of China (grant no. 20720210076), and Fujian Provincial Central Guided Local Science and Technology Development Special Project (grant no. 2022L3078). The data provided by Luiz C. Cotovicz Jr. were supported by the Brazilian National Council of Research and Development (CNPq-Pve No. 401.726/2012-6) and by the Carlos Chagas Foundation for Research Support of the State of Rio de Janeiro (FAPERJ; No. E-26202.785/2016). Data provided by Stefano Cozzi were collected in the framework of Italian (PRISMA 1 and 2, ANOCSIA and VECTOR) and European (OCEANCERTAIN) research projects. Data provided by MG were collected within the Project “Mucilages in the Adriatic and Tyrrhenian Seas (MAT)”, coordinated by the Istituto Centrale per la Ricerca Scientifica e Tecnologica Applicata al Mare and financially supported by the Italian Ministry of the Environment. Data obtained from the Georgia coast (USA) were supported by the National Science Foundation through grants OCE-1832178 (GCE-LTER Program) and OCE-1902131. Observations in the southern Caribbean Sea including the Cariaco Basin were collected as part of the CARIACO Ocean Time Series programme (supported by the Consejo Nacional de Ciencia y Tecnología of Venezuela, the Ley de Ciencia, Tecnología e Innovación de Venezuela, the Estación de Investigaciones Marinas de Venezuela; the National Science Foundation (grant nos. OCE-0752139, OCE-9216626, OCE-9729284, OCE-491 9401537, OCE-9729697, OCE-9415790, OCE-9711318, OCE-0326268, OCE-0963028, OCE-0326313, and OCE-0326268, NASA grants NAG5-6448, NAS5-97128, and NNX14AP62A); the Inter-American Institute for Global Change Research grant IAI-CRN3094), and the Marine Biodiversity Observation Network/MBON of the Group on Earth Observations Biodiversity Observation Network). Data provided by Digna Rueda-Roa and Bradley Eyre was supported by ARC Linkage (LP0770222), with Norske-Skog Boyer and the Derwent Estuary Program providing financial and in-kind assistance, This work is contributing to the ICM’s ‘Center of Excellence’ Severo Ochoa (CEX2019-000928-S)., Peer reviewed

1 file, This global database (CoastDOM v.1) contains both previously published and unpublished measurements of Dissolved organic carbon (DOC), nitrogen (DON) and phosphorus (DOP) in coastal waters. The dataset also contains hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g., Chlorophyll-a, inorganic nutrients) and the inorganic carbon system (e.g., dissolved inorganic carbon and total alkalinity). The data included were collected from 1978 to 2022 and consist of 62339 data points for DOC, 20360 for DON and 13440 for DOP, Danmarks Frie Forskningsfond, grant/award no. 1127-00033B. National Science Centre Poland (NCN), grant/award no. UMO-2019/33/B/ST10/01232. Natural Environment Research Council (NERC), grant/award no. NE/N018087/1: Land Ocean CArbon TransfEr (LOCATE), With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)., Peer reviewed