2015-2020年海北高寒草甸碳水热通量观测数据集  

A dataset of the observations of carbon,water and heat fluxes over an alpine meadow in Haibei(2015-2020)

作　　者：张法伟[1] 司梦可 郭小伟[1] 曹广民[1] 张振华[1] ZHANG Fawei;SI Mengke;GUO Xiaowei;CAO Guangmin;ZHANG Zhenhua(Key Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,P.R.China)

机构地区：[1]中国科学院西北高原生物研究所,高原生物适应与进化重点实验室,西宁810008

出　　处：《中国科学数据（中英文网络版）》2023年第2期122-131,共10页China Scientific Data

基　　金：国家生态科学数据中心开放基金项目(NESDC20210203);国家重点研发计划(2017YFA0604801);国家自然科学基金(41730752);2021年度青海省昆仑英才-拔尖人才。

摘　　要：青藏高原寒高草甸面积约为5.04×10^(5) km^(2),是高原生态屏障功能发挥和区域可持续发展的重要基质。2014年5月,青海海北高寒草地生态系统国家野外科学观测研究站(简称海北站)应用涡度相关技术进行高寒禾草-矮嵩草(Kobresia hulimis)草甸生态系统碳水循环和能量交换的连续观测,获取了宝贵的原始资料。经过异常值剔除、缺失通量数据的增强回归树模型插补等数据质控流程,海北站拟公开发布2015–2020年高寒草甸碳水热通量观测数据集。本数据集包含净生态系统CO_(2)交换、生态系统CO_(2)呼吸、总生态系统CO_(2)交换、潜热通量、显热通量等通量数据子集和空气温度、空气相对湿度、总辐射、净辐射、光合有效辐射、降水、土壤温度、土壤体积含水量等常规微气象数据子集,时间分辨率有30分钟、日、月和年等4种尺度。本数据集可以用于高寒草甸生态系统碳水循环过程模型的参数优化及碳素固持、水源涵养等生态功能的时空格局及演变趋势的科学认知。Covering an area of 5.04×10^(5) km^(2) on the Qinghai-Tibetan Plateau,Alpine meadow is essential to the plateau ecological barrier function and regional sustainable development.Since May 2014,Haibei National Field Research Station for Alpine Grassland(Haibei Station hereafter)has been accumulating amounts of valuable data by employing eddy covariance techniques to continuously measure carbon and water cycles and energy exchanges between an alpine Graminoid-Kobresia meadow ecosystem and the atmosphere.In the following of data processing such as outlier removal and flux data gaps filled by boosted regression tree model,Haibei Station plans to publish a dataset of the continuous observations of carbon,water,and heat fluxes of the alpine meadow from 2015 to 2010.This dataset consists of the subsets of carbon,water,and heat fluxes data(i.e.net ecosystem CO_(2) exchange,ecosystem CO_(2) respiration,gross ecosystem CO_(2) exchange,latent heat flux,and sensible heat flux)and the subsets of routine meteorological data(i.e.air temperature,air relative humidity,total solar radiation,net radiation,photosynthetically active radiation,precipitation,soil temperature,volumetric soil moisture content).The temporal resolutions of the dataset are half-hourly,daily,monthly,and yearly scales.This dataset can be used to validate the parameters of processes-based ecological models of carbon and water cycles and to evaluate the spatiotemporal patterns and evolution trends in ecological functions of carbon sequestration and water-holding capacity in alpine meadow ecosystems.

关 键 词：涡度相关技术 碳水热通量 高寒禾草-矮嵩草草甸 2015–2020年 青藏高原 

分 类 号：S812[农业科学—草业科学]