祁连山综合观测网：黑河流域地表过程综合观测网（大满超级站叶面积指数-2018）

该数据集包含了2018年6月11日至2018年9月18日的黑河水文气象观测网中游大满超级站叶面积指数观测数据。站点(100.372° E, 38.856° N)位于甘肃省张掖市大满灌区内，海拔1556m，下垫面是玉米。观测样方共计3个，每个样方大小约30m×30m，经纬度范围分别为(100.373297°E~100.374205°E, 38.857871°N~38.858390°N)、(100.373918° E~100.373897°E, 38.854025°N~38.854941°N)、(100.368007°E~100.369044°E, 38.850678°N~38.851580°N)。每个样方内布设5个冠层下节点和1个冠层上节点。
本数据集由叶面积指数无线传感网（LAINet）获取，该仪器原始观测数据为仪器自动获取的每个节点逐日逐小时的光照数据（Level0），利用LAINet软件对原始观测数据进行处理，逐节点计算每天LAI（Level1），进一步对无效值识别与填充，并7天滑动平均消除天气变化对LAI计算的影响（Level2），对有多个LAINet节点的观测子区，节点的均值为该子区的最终观测值（Level3）。
本次发布的数据集为处理后的Level3产品，数据以*.xls格式存储。
黑河流域地表过程综合观测网或站点信息请参考Liu et al. (2018)，观测数据处理请参考Qu et al. (2014)。

This dataset contains leaf area index (LAI) observation data from the Daman Super Station in the middle reaches of the Heihe River Hydrometeorological Observation Network, covering the period from June 11 to September 18, 2018. The station, located at (100.372° E, 38.856° N), is situated within the Daman Irrigation District in Zhangye City, Gansu Province, with an altitude of 1556 m and its underlying surface covered by maize. A total of 3 observation plots are deployed here, each with an approximate size of 30 m × 30 m. Their longitude and latitude ranges are (100.373297°E~100.374205°E, 38.857871°N~38.858390°N), (100.373918°E~100.373897°E, 38.854025°N~38.854941°N), and (100.368007°E~100.369044°E, 38.850678°N~38.851580°N), respectively. Five below-canopy nodes and one above-canopy node are arranged in each plot.

This dataset is acquired via the Leaf Area Index Wireless Sensor Network (LAINet). The original observational data (Level 0) are hourly light data automatically collected by each node on a daily basis. Raw data are processed using LAINet software: daily LAI is calculated for each node (Level 1); invalid values are identified and filled, and a 7-day moving average is applied to eliminate the impact of weather variability on LAI calculations (Level 2); for observation sub-areas with multiple LAINet nodes, the mean value of all nodes is taken as the final observation value of the sub-area (Level 3).

The dataset released herein is the processed Level 3 product, stored in *.xls format. For information on the Heihe River Watershed Integrated Observation Network for Surface Processes or the relevant station, please refer to Liu et al. (2018); for details on observational data processing, please consult Qu et al. (2014).

搜集汇总

背景与挑战

背景概述

该数据集是祁连山综合观测网的一部分，专注于黑河流域大满超级站2018年的叶面积指数观测，时间覆盖2018年6月21日至9月28日，数据以日分辨率提供，总大小为43.00 KB。数据集包含3个观测样方，每个约30m×30m，下垫面为玉米，通过LAINet仪器获取并处理为Level3产品，以.xls格式存储，用于研究植被生长和地表过程。