coSIF Data Product for February, April, July, and October 2021

The monthly, 0.05-degree resolution coSIF predictions and corresponding root-mean-squared prediction errors (RMSPEs) for each of February, April, July, and October 2021 over North America. Each NetCDF file corresponds to one of the four months and contains two variables: "cosif_prediction" and "cosif_rmspe." For example, "coSIF_202102.nc4" corresponds to February 2021. All units are Watts per square meter, per steradian, and per micrometer (W \ m^2 \ sr \ \(\mu\)m). As described in Jacobson et. al. (2023), predictions and RMSPEs for July 2021 were produced using cokriging. For all other months, predictions and RMSPEs were produced using kriging.本数据集涵盖2021年2月、4月、7月及10月北美区域内逐月、0.05度分辨率的coSIF预测值，以及与之对应的均方根预测误差（root-mean-squared prediction errors, RMSPEs）。每个采用网络通用数据格式（Network Common Data Form, NetCDF）存储的文件对应上述四个月份中的一个，且包含两个变量："cosif_prediction"与"cosif_rmspe"。例如，文件"coSIF_202102.nc4"对应2021年2月的数据。所有变量的单位均为瓦每平方米·球面度·微米（W·m⁻²·sr⁻¹·μm⁻¹）。据Jacobson等（2023）的研究，2021年7月的预测值与均方根预测误差采用协同克里金（cokriging）方法生成。其余三个月份的预测值及均方根预测误差均采用克里金（kriging）方法生成。