High-frequency water chemistry timeseries data from the Upper Kuparuk River and Oksrukuyik Creek, Alaska, 2017-2019 and 2021-2023

Rapid climate change in the Arctic is expected to enhance lateral fluxes of organic carbon and nutrients from thawing soils to Arctic rivers. However, the seasonal and landscape drivers of Arctic riverine solute flux remain poorly understood. To understand changing patterns of solute flux within Arctic headwater catchments, we collected high-frequency measurements of water quality and meteorological data at the outlet of two catchments on the North Slope of Alaska: the Upper Kuparuk River catchment and Oksrukuyik Creek. From early June to late August across six years, we monitored dissolved organic carbon (DOC) and nitrate (NO3-) concentrations (2017-2019, 2021-2023), turbidity and specific conductance (2022-2023), pH, dissolved oxygen, water temperature, photosynthetically active radiation, and other meteorological parameters (2021-2023) at 15-minute intervals.北极地区快速的气候变化预计将增强解冻土壤向北极河流输送的有机碳与营养盐侧向通量。然而，目前学界对北极河流溶质通量的季节与景观驱动因子仍缺乏深入认知。为厘清北极源头集水区内溶质通量的变化规律，我们在阿拉斯加北坡的两个集水区出水口处开展了水质与气象数据的高频监测，分别为上游库帕鲁克河集水区（Upper Kuparuk River catchment）与奥克鲁伊克溪（Oksrukuyik Creek）。在六年的6月初至8月末时段内，我们以15分钟为监测间隔开展工作：2017-2019年与2021-2023年监测溶解有机碳（DOC，dissolved organic carbon）与硝酸盐（NO3-，nitrate）浓度；2022-2023年监测浊度与比电导率；2021-2023年还监测了pH值、溶解氧、水温、光合有效辐射及其他气象参数。