North Temperate Lakes LTER: High Frequency Meteorological and Dissolved Oxygen Data - Trout Lake Buoy 2004 - current

The instrumented buoy on Trout Lake is equipped with a dissolved oxygen sensor, a thermistor chain, and meteorological sensors that provide fundamental information on lake thermal structure, weather conditions, and lake metabolism. Data are usually collected every 10 minutes with occasional periods of 2 minute data for short periods to answer specific questions. The D-Opto dissolved oxygen sensor is 0.5m from the lake surface. Meteorological sensors measure wind speed, wind direction, relative humidity, air temperature, photosynthetically active radiation (PAR), and barometric pressure. Starting in 2005, thermistors were placed every 0.5-1m from the surface through 14m and every 2 to 4m from 14m to the bottom of the water column at 31m. In July 2006, a new thermistor chain was deployed with thermistors placed every meter from the surface through a depth of 19 meters. After correcting for flux to or from the atmosphere and vertical mixing within the water column, high frequency measurements of dissolved gases such as carbon dioxide and oxygen can be used to estimate gross primary productivity, respiration, and net ecosystem productivity, the basic components of whole lake metabolism. Data are averaged to daily values from one minute samples for years 2005 - 2006. Daily values are computed from high resolution data starting in year 2007. Data are averaged to hourly values from one minute samples for years 2005 - 2008, Hourly values are computed from high resolution data starting in year 2009. Hourly and daily values may not be current with high resolution data in the current year. Sampling Frequency: varies for instantaneous sample. averaged to hourly and daily values from one minute samples Number of sites: 1鳟湖（Trout Lake）上的仪器化浮标配备了溶解氧传感器（dissolved oxygen sensor）、热敏电阻链（thermistor chain）与气象传感器，可提供湖泊热结构、气象条件及湖泊代谢的基础数据。数据常规采集频率为每10分钟1次，偶尔会在短时段内采用2分钟的采样间隔以响应特定研究问题。D-Opto型溶解氧传感器布设位置距湖面0.5米。气象传感器可测量风速、风向、相对湿度、空气温度、光合有效辐射（Photosynthetically Active Radiation, PAR）与大气压力。2005年起，热敏电阻按如下间距布设：表层至14米水深范围内每0.5~1米布设1个，14米至31米水深（水柱总深度）范围内每2~4米布设1个。2006年7月，部署了全新的热敏电阻链，表层至19米水深范围内每1米布设1个热敏电阻。在对水柱内的大气通量交换与垂直混合过程进行校正后，二氧化碳、氧气等溶解气体的高频测量数据可用于估算总初级生产力、呼吸作用与生态系统净生产力，这是完整湖泊代谢的核心组成部分。2005-2006年的1分钟采样数据将被平均为日均值；2007年起，日均值由高分辨率数据计算得到。2005-2008年的1分钟采样数据将被平均为小时均值；2009年起，小时均值由高分辨率数据计算得到。当年的高分辨率数据暂未同步生成小时与日均值统计值。采样频率说明：瞬时采样频率存在变动，原始1分钟采样数据会被整合为小时与日均值统计值。研究站点数量：1个