红枫湖水体中碳的时空分布特征分析

基于2013年8月、10月、11月及2014年3月在红枫湖5个表层水样采集点、3个分层水样采集点测定的总碳、无机碳、总有机碳及二氧化碳数据,结合当时的气象数据对碳的时空分布特征讨论分析。结果表明,虽然调查期间同时间相同水层各个水样采集点的上述4个指标差异并不明显,但同一时间不同分层水体及各水样采集点不同季节在碳分布上存在一定差异。温度越高,光照越长,生物活性越强,湖体碳被生物利用的比例越大,总碳、无机碳、总有机碳含量就越低,较强的生物活性也伴随更多的二氧化碳产生。上、下层水体因光与温度差异所导致的碳分布差异会因季节性翻湖而消失。

Analysis on the Spatial and Temporal Characteristics of Carbon in Hongfeng Lake

Based on the meteorological data and the data of total carbon, inorganic carbon, total organic carbon and carbon dioxide from 8 sample sites (5 sites for surface water sampling and 3 sites for different layer water sampling) in Hongfeng Lake at August, October, November in 2013, and March in 2014, the spatial and temporal characteristics of carbon in Hongfeng Lake were analyzed. There were no obvious differences between the concentration of total carbon, inorganic carbon, organic carbon and carbon dioxide in the same layer at the same time, but the differences exist between different layers and different periods. The ratio of carbon that was used by aquatic organism will be higher in higher temperature and stronger light intensity conditions, so in which condition, the concentration of total carbon, inorganic carbon, and total organic carbon appeared to be lower, and more carbon dioxide were produced by aquatic organism. The difference of carbon distribution between different layer accused by different temperature and lighting condition would disappear after a vertical water mixing when air temperature drawdown sharply.