Related Experiment Video
Updated: May 9, 2025

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
Published on: May 29, 2019
A global 1 km resolution daily surface longwave radiation product from MODIS satellite data from 2000-2023
Jie Cheng1,2, Qi Zeng3,4, Hao Sun3,4
1State Key Laboratory of Remote Sensing and Digital Earth, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China. Jie_Cheng@bnu.edu.cn.
Abstract:
Surface longwave radiation (SLWR) is one of the two components of the surface radiation budget (SRB), which is a driving force of many land surface process models, the water cycle and climate change. To our knowledge, there are currently no publicly accessible long-term high-resolution (1 km) global daily surface longwave radiation products. We developed hybrid methods for estimating the 1 km resolution instantaneous clear-sky surface longwave upwelling radiation (SLUR) and surface longwave downwelling radiation (SLDR) and the cloud base temperature-based (CBT) single-layer cloud model (SLCM) for estimating the instantaneous cloudy-sky SLDR from MODIS data. The Essential thermaL Infrared remoTe sEnsing (ELITE) broadband emissivity (BBE) product and reanalysis surface temperature were employed to calculate the cloudy-sky SLUR. Synchronized with the diurnal information extracted from the ERA5 reanalysis data, we generated a 1 km resolution all-sky daily surface longwave radiation product (including SLUR and SLDR) via temporal integration. The produced daily SLUR and SLDR were validated via ground measurements collected from 369 sites distributed worldwide from nine flux networks. The root mean square error (RMSE) of the daily SLUR is less than 18 W/m2, and the RMSE of the daily SLDR is approximately 25 W/m2. The accuracy is commensurate with that of CERES-SYN.
More Related Videos
10:28Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
Published on: June 13, 2020
09:55Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
Published on: December 12, 2013
Related Concept Videos
Radiation: Applications
The average...
Precipitation Gravimetry
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Global Climate Change
GIS Software, Hardware, and Sources of GIS Data
The Water Cycle
Temperature Measurement Sites
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...