Measurements of water column specific conductivity, salinity, dissolved oxygen, chlorophyll, temperature, and pH by deployed datasondes every 20 minutes for several periods during the summertime in 2017-2020

West Falmouth Harbor (West Falmouth, MA, USA) has been experiencing a dramatic increase in nitrogen loading from an upgradient municipal wastewater treatment facility since the early 2000's. As part of a long-term study into the effects of this nitrogen enrichment, we have measured water column parameters at 20 minute intervals in two locations within West Falmouth Harbor (West Falmouth, MA, USA), one in the well-flushed outer basin and one in the inner basin closer to the dominant groundwater N source. The goal of this dataset is to compare conditions at the two sites, as well as to derive rates of metabolism. Parameters measured include temperature, specific conductivity, salinity, dissolved oxygen, chlorophyll, and pH. YSI Datasondes were deployed during 4 periods ranging from 6 to 11 days in July and August, suspended vertically from a surface buoy. Over all deployments, instruments passed all QA checks, and average differences between the two instruments over all deployments were less than 0.06 degrees C (temperature), 0.3 (salinity), 0.05 (pH), 1.0 µg/L (chlorophyll), 1.5 (%DO Saturation). Data provided here are not corrected for drift, and chlorophyll data are uncorrected as reported by the instruments. Chlorophyll reported is uncorrected from the YSI calculation based on in-situ fluorescence and calibration with a single-point using deionized water. Lab fluorometric analysis checks show that the YSI chlorophyll is over-reporting by at least 20% at low concentrations, and high concentrations were not able to be validated. Methodology details and analysis of earlier data can be found in Howarth et al 2014, "Metabolism of a nitrogen-enriched coastal marine lagoon during the summertime," doi:10.1007/s10533-013-9901-x

美国马萨诸塞州西法尔茅斯的西法尔茅斯港（West Falmouth Harbor）自21世纪初以来，因上游市政污水处理厂的排放导致氮负荷急剧攀升。作为针对此次氮富集效应开展的长期研究的一部分，我们于该港的两个监测点位以20分钟为间隔对水柱参数进行了连续监测：一处位于水交换充分的外港池，另一处位于更靠近主要地下水氮源的内港池。本数据集旨在对比两处点位的环境状况，并推导水域代谢速率。

本次监测的参数涵盖温度、比电导率、盐度、溶解氧、叶绿素及pH值。研究于7月至8月间开展4次部署，每次时长6至11天，通过水面浮标垂直悬挂部署YSI Datasondes水质监测仪。所有部署阶段中，仪器均通过全部质量保证（QA）核查；两台监测仪在各阶段的平均差值均低于：温度0.06℃、盐度0.3、pH值0.05、叶绿素1.0 μg/L、溶解氧饱和度1.5%。

本次发布的数据未进行漂移校正，且叶绿素数据均为仪器原生上报值，未作校正。本次上报的叶绿素数据未针对YSI的计算结果进行校正：该计算基于原位荧光值，且仅使用去离子水进行单点校准。实验室荧光分析核查结果显示，低浓度条件下YSI叶绿素传感器的读数至少高估20%，而高浓度条件下的读数无法得到验证。

有关研究方法细节及早期数据分析内容，可参阅Howarth等人2014年发表的《夏季氮富集型沿海海洋泻湖的代谢过程》，DOI:10.1007/s10533-013-9901-x