Energy-conservation datasets of global land surface radiation and heat fluxes from 2000-2020 generated by CoSEB

Land surface radiation balance and heat balance play an important role in Earth's climate system, representing the physical processes by which the surface-atmosphere absorb and redistribute the radiation and heat fluxes, and facilitating the exchange of water, energy, carbon.
The datasets provide globally gridded, energy-conserving estimates of eight land surface radiation and heat fluxes, including downward shortwave radiation (SW_IN), downward longwave radiation (LW_IN), upward shortwave radiation (SW_OUT), upward longwave radiation (LW_OUT), net radiation (Rn), latent heat flux (LE), soil heat flux (G) and sensible heat flux (H). The datasets span February 26, 2000 to December 31, 2020, at a daily temporal resolution and 0.05° spatial resolution.
The datasets were generated by Coordinated estimates of global land Surface Energy Balance components (CoSEB) model that was renewed with a combination of in-situ observations from FLUXNET, AmefiFlux, EuroFlux, OzFlux, TPDC and ChinaFLUX, remote sensing data from GLASS and MODIS, and ERA5-Land reanalysis datasets.
The eight global land surface radiation and heat fluxes included in the datasets comply with both energy balance and radiation balance. The root mean square errors (RMSEs) for daily estimates of SW_IN, SW_OUT, LW_IN, LW_OUT, Rn, LE, H and G from the CoSEB-based datasets are 37.52 W/m², 14.20 W/m², 22.47 W/m², 13.78 W/m², 29.66 W/m², 30.87 W/m², 29.75 W/m² and 5.69 W/m², respectively, when validated against in-situ observations at 44 independent test sites.

地表辐射平衡与热量平衡在地球气候系统中发挥着核心作用，其表征了地表-大气系统吸收、再分配辐射与热通量的物理过程，同时助力水、能量与碳的交换。
本数据集提供了全球格网化、满足能量守恒约束的8种地表辐射与热通量估算产品，涵盖下行短波辐射（downward shortwave radiation, SW_IN）、下行长波辐射（downward longwave radiation, LW_IN）、上行短波辐射（upward shortwave radiation, SW_OUT）、上行长波辐射（upward longwave radiation, LW_OUT）、净辐射（net radiation, Rn）、潜热通量（latent heat flux, LE）、土壤热通量（soil heat flux, G）以及感热通量（sensible heat flux, H）。数据集的时间跨度为2000年2月26日至2020年12月31日，时间分辨率为逐日，空间分辨率为0.05°。
该数据集由更新后的全球地表能量平衡分量协同估算（Coordinated estimates of global land Surface Energy Balance components, CoSEB）模型生成，模型融合了多源数据：FLUXNET、AmefiFlux、EuroFlux、OzFlux、TPDC与ChinaFLUX的原位观测数据、GLASS与MODIS遥感数据，以及ERA5-Land再分析数据集。
数据集包含的8种全球地表辐射与热通量均同时满足能量平衡与辐射平衡约束。基于CoSEB模型的数据集的逐日估算结果，在44个独立试验站点的原位观测验证中，SW_IN、SW_OUT、LW_IN、LW_OUT、Rn、LE、H与G的均方根误差（root mean square error, RMSE）分别为37.52 W/m²、14.20 W/m²、22.47 W/m²、13.78 W/m²、29.66 W/m²、30.87 W/m²、29.75 W/m²与5.69 W/m²。

搜集汇总

背景与挑战

背景概述

该数据集包含2000-2020年全球地表辐射和热通量的每日估计，空间分辨率为0.05°，涵盖八种关键能量平衡组分。数据通过CoSEB模型生成，结合了多源观测和遥感数据，并经过严格验证，确保能量和辐射平衡的准确性。