North Temperate Lakes LTER: High Frequency Meteorological and Dissolved Oxygen Data - Crystal Bog Buoy 2005 - current

The instrumented buoy on Crystal Bog 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, thermistors are placed every 0.25m throughout the water column, and meteorological sensors measure wind speed, relative humidity, and air temperature. 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. Sampling Frequency: varies for instantaneous sample. averaged to hourly and daily values from one minute samples Number of sites: 1水晶沼（Crystal Bog）上搭载的传感器浮标配备了溶解氧传感器（dissolved oxygen sensor）、热敏电阻链（thermistor chain）以及气象传感器，可提供湖泊热结构、天气状况与湖泊代谢的基础观测数据。数据通常以10分钟为采集间隔，偶尔会在短时段内采用2分钟的采样频率以响应特定研究需求。该D-Opto型溶解氧传感器布设于距湖面0.5米处，热敏电阻在整个水柱中以0.25米的间距均匀布设，气象传感器则用于监测风速、相对湿度与空气温度。在修正大气与水体间的通量以及水体内部的垂直混合效应后，二氧化碳、氧气等溶解气体的高频观测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——这三者是全湖代谢的核心组成要素。采样频率：瞬时采样的频率存在差异；可通过1分钟采样数据平均得到逐小时与逐日的统计值。站点数量：1个