2018-2020年松嫩平原长岭盐碱稻田碳水通量观测数据集

A d ataset of carbon and water fluxes in the Changling alkali-saline paddy rice fields in the Songnen Plain,China(2018-2020)

与其他陆地生态系统相比,农田生态系统与大气间的CO_(2)和H2O交换的过程具有多变性与复杂性,其交换过程不仅受到环境因子的影响,还受作物类型、种植模式、管理方式等因素的共同作用。作为中国东北松嫩平原盐碱地改良过程中最有效的治理措施之一,洗盐种稻具有较强的区域代表性,在气候调节、水分利用、碳汇功能等方面都亟待研究,需要实地监测数据作为支撑。基于微气象学理论的涡度协方差技术,可以对农田生态系统与大气间CO_(2)和水热通量交换进行直接测量。本数据集为长岭盐碱稻田2018–2020年通量观测结果,该结果经ChinaFLUX技术标准体系进行质量控制与插补处理。数据集的时间尺度含半小时、日、月和年,数据指标具体包括观测期间的大气温度(Ta)、空气相对湿度(RH)、水汽压(e)、饱和水汽压(es)、土壤温度(Ts)、土壤水分(SWC)、净辐射(Rn)、光合有效辐射(PAR)、降雨量(P)、风速(Ws)、风向(Wd)、显热通量(Hs)、潜热通量(LE)、蒸散量(ET)、二氧化碳净交换量(NEE)、生态系统呼吸(Re)、总生态系统交换量(GEE)等。建立和共享本数据集可为农田生态系统与大气间能量与物质交换提供本底资料,为区域生态系统评估提供数据支持和理论参考。

Compared with other terrestrial natural ecosystems,the land-atmosphere interaction in managed farmland ecosystem is more complex and changeable,due to the effect of crop types,cropping pattern,management practices,etc.As one of the most effective measures against the process of land alkalization and salinization in the Songnen Plain of Northeast China,paddy rice planting after desalination highly representative model for studying climate mitigation,water use and carbon balance.To support this approach effectively,it requires comprehensive field monitoring data.The eddy covariance method,grounded in micrometeorological theory,is widely recognized as the primary and direct approach for measuring CO_(2)and H2O exchanges in farmland ecosystems.This dataset comprises field measurements of Changling alkali-saline paddy rice during 2018–2020 subjected to rigorous quality control and gap filling in accordance with the ChinaFLUX data processing criteria.The dataset specifically includes half-hourly,daily,monthly and yearly scales of air temperature(Ta),air relative humidity(RH),water vapor pressure(e),saturated water vapor pressure(es),soil temperature(Ts),soil water content(SWC),net radiation(Rn)with four components,photosynthetically active radiation(PAR),rainfall(P),wind speed(Ws),wind direction(Wd),sensible heat flux(Hs),latent heat flux(LE),evapotranspiration(ET),net ecosystem CO_(2)exchange(NEE),ecosystem respiration(Re),gross ecosystem exchange(GEE),etc.The establishment and sharing of this dataset can offer valuable data support and a solid theoretical foundation for regional farmland ecosystem assessment and management.