North Temperate Lakes LTER: High Frequency Meteorological - Trout Lake Buoy2 - ADCP 2005 - 2006

This instrumented buoy on Trout Lake is equipped with a thermistor chain and meteorological sensors that provide fundamental information on lake thermal structure, weather conditions, and lake metabolism. An acoustic Doppler current profiler (ADCP) is associated with this buoy. Data are usually collected every 10 minutes with occasional periods of 2 minute data for short periods to answer specific questions. The thermistors are placed every 0.5-1m from the surface through 13m, and meteorological sensors measure relative humidity, air temperature and wind parameters. In the fall of 2005, the buoy also included 4 Greenspan dissolved oxygen sensors placed at depths from the lake surface to 10m. 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

特劳特湖（Trout Lake）上的搭载测量仪器的浮标，配备热敏电阻链与气象传感器，可获取湖泊热结构、气象条件及湖泊代谢相关的基础数据。该浮标还搭载了声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，ADCP）。数据常规采集频率为每10分钟一次，偶尔会在短期内采用每2分钟的采样间隔，以满足特定研究需求。热敏电阻沿水深方向从湖面至13米处布设，布设间距为0.5至1米；气象传感器用于测量相对湿度、空气温度与风速参数。2005年秋季，该浮标新增4台格林斯潘溶解氧传感器（Greenspan dissolved oxygen sensors），布设深度范围为湖面至水下10米。在修正大气与水体间的气体交换通量以及水柱内的垂直混合过程后，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，这三者是完整湖泊代谢的核心组成要素。采样频率：瞬时采样频率存在波动，可将1分钟采样的原始数据平均为小时级与日级均值。监测点位数量：1