A global long-term ocean surface daily/0.05° net radiation product from 1983-2020

The all-wave net radiation (R-n) on the ocean surface characterizes the available radiative energy balance and is important to understand the Earth's climate system. Considering the shortcomings of available ocean surface R-n datasets (e.g., coarse spatial resolutions, discrepancy in accuracy, inconsistency, and short duration), a new long-term global daily R-n product at a spatial resolution of 0.05 degrees from 1983 to 2020, as part of the Global High Resolution Ocean Surface Energy (GHOSE) products suite, was generated in this study by fusing several existing datasets including satellite and reanalysis products based on the comprehensive in situ measurements from 68 globally distributed moored buoy sites. Evaluation against in-situ measurements shows the root mean square difference, mean bias error and correlation coefficient squared of 23.56 Wm(-2), 0.88 Wm(-2) and 0.878. The global average ocean surface R-n over 1983-2020 is estimated to be 119.71 +/- 2.78 Wm(-2) with a significant increasing rate of 0.16 Wm(-2) per year. GHOSE R-n product can be valuable for oceanic and climatic studies.

Automated summary

A new long-term global daily net radiation product for the ocean surface was generated in this study, addressing the shortcomings of existing datasets. By fusing multiple datasets and comparing with in-situ measurements, estimates and growth rates of global ocean surface net radiation were obtained, providing valuable data for oceanic and climatic studies.