Global Retrieval of 24-hourly Solar-Induced Chlorophyll Fluorescence and Evapotranspiration from OCO-2, OCO-3 and ECOSTRESS over 1982–2022

We developed an efficient modeling algorithm and produced a long-term global SIF and ET dataset (0.1°, hourly, from 1982 to 2022), which has been validated using global EC flux towers and popular satellite products. Our dataset will provide new insights for monitoring the diurnal variations of carbon and water cycles and deepen our understanding of their changes over the past 41 years.All products are provided in NetCDF4 format. Our dataset contains four main fields: SIFOCO, which represents continuous SIF data obtained by extending canopy-level SIF from OCO-2 and OCO-3 observations; SIFtotal-D, which represents photosystem-level SIF directly calculated based on a radiative transfer model; SIFtotal-S, which represents photosystem-level SIF obtained from the SCOPE model; and ETECO, which represents continuous ET data obtained by scaling ECOSTRESS observations. Detailed descriptions of these four main fields, including units, coverage, and other relevant information, are included in the NetCDF4 files.本研究开发了一套高效的建模算法，构建了1982年至2022年逐小时、0.1°空间分辨率的全球长期日光诱导叶绿素荧光（Solar-Induced Chlorophyll Fluorescence, SIF）与蒸散发（Evapotranspiration, ET）数据集。该数据集已通过全球涡度协方差通量塔（EC flux towers）及主流卫星产品完成验证。本数据集可为碳循环与水循环的日变化监测提供全新研究视角，并加深我们对过去41年间二者变化规律的认知。所有产品均采用网络通用数据格式第4版（NetCDF4）存储。本数据集包含四个核心字段：SIFOCO，即基于OCO-2（Orbiting Carbon Observatory 2, OCO-2）与OCO-3（Orbiting Carbon Observatory 3, OCO-3）观测的冠层尺度日光诱导叶绿素荧光拓展得到的连续型SIF数据；SIFtotal-D，即基于辐射传输模型（radiative transfer model）直接计算得到的光系统尺度SIF数据；SIFtotal-S，即通过SCOPE模型获取的光系统尺度SIF数据；ETECO，即通过尺度化ECOSTRESS观测得到的连续型ET数据。上述四个核心字段的详细说明（包括单位、覆盖范围及其他相关信息）均包含在NetCDF4文件中。

搜集汇总

背景与挑战

背景概述

该数据集是一个长期全球太阳诱导叶绿素荧光（SIF）和蒸散发（ET）数据集，覆盖1982年至2022年，时间分辨率为小时级，空间分辨率为0.1°。它基于OCO-2、OCO-3和ECOSTRESS卫星观测，通过高效建模算法生成，包含四个主要字段，旨在监测碳和水循环的日变化，并为过去41年的变化提供新见解。