Quality controlled in situ data from multiple locations in Lake Sunapee, NH, USA from the Lake Sunapee Protective Association's Long-term Monitoring Program, 1986-2020

<em>Code and Data Description:</em> The code contained in this release documents the quality control measures that have been made to collate the data from the Lake Sunapee Protective Association’s (LSPA) Long-term Monitoring Program (LMP) database. The LMP data are collected in conjunction with the New Hampshire Department of Environmental Services’ (NH DES) Volunteer Lake Assessment Program (VLAP). The data in this release have been filtered to remove obviously errant data, to flag suspicious data, and to otherwise collate the data for further use. <em>Background Information:</em> Lake Sunapee is located in the Sugar River watershed within Sullivan and Merrimack Counties, NH, USA. It is a drainage lake with predominantly muck substrate. It has a surface area of 1667 hectares, 53 kilometers of developed shoreline and a maximum depth of 33.7 meters. Starting in the 1980s, the LSPA volunteer water quality monitors have been regularly sampling Lake Sunapee’s water in cove and deep sites in Lake Sunapee. This monitoring is made possible by the LSPA. Until 2019, all parameters except dissolved oxygen concentration, saturation, and water temperature (which were measured by a sonde, <em>in-situ</em>) were measured at LSPA’s Water Quality Laboratory at Colby-Sawyer College. Beginning in 2019, a YSI ProDSS multiprobe sonde was used to measure dissolved oxygen concentration and saturation, water temperature, pH, conductivity, and turbidity <em>in-situ</em>. Additional notes about methodology can be found in the README file, any questions about methodology should be directed to the LSPA. <em>Data Lineage:</em> All data originated from the LSPA, much of which are also archived by the NH DES VLAP database. At the time of this release, neither database exists as a citable data source with a DOI. <em>Maintenance:</em> Data collection is ongoing. There will be future releases approximately annually.<em>代码与数据说明：</em>本发布包附带的代码，记录了为整理萨纳比湖保护协会（Lake Sunapee Protective Association，LSPA）长期监测项目（Long-term Monitoring Program，LMP）数据库数据所采用的质量控制流程。LMP数据的采集工作与新罕布什尔州环境服务部（New Hampshire Department of Environmental Services，NH DES）的志愿湖泊评估项目（Volunteer Lake Assessment Program，VLAP）协同开展。本发布包中的数据已完成预处理：剔除明显异常的数据，标记存疑数据，并完成整体整理以支持后续复用。 <em>背景信息：</em>萨纳比湖坐落于美国新罕布什尔州沙利文县与梅里马克县境内的糖河流域，为排水型湖泊，底质以腐殖泥为主。该湖湖面面积达1667公顷，已开发岸线总长53千米，最大水深33.7米。自20世纪80年代起，LSPA的志愿水质监测人员便定期对萨纳比湖的湾口区与深水区开展水样采集，此项监测由LSPA支持实施。直至2019年，除溶解氧浓度、溶解氧饱和度及水温（由探头<em>in-situ</em>原位测量）外，其余所有监测参数均在科尔比-索耶学院内的LSPA水质实验室完成检测。自2019年起，团队改用YSI ProDSS多参数原位探头，对溶解氧浓度、溶解氧饱和度、水温、pH值、电导率及浊度进行<em>in-situ</em>原位检测。有关采样与检测方法的补充说明详见README文件，若对相关方法存有疑问，请联系LSPA咨询。 <em>数据溯源：</em>所有数据均源自LSPA，其中大部分同时被NH DES VLAP数据库存档。本发布之时，上述两个数据库均未配备可引用的数字对象标识符（DOI）。 <em>维护更新：</em>数据采集工作仍在持续推进，后续将按年度频率发布更新版本。