This study used downward longwave (LW) radiation measurements, air temperature (T), particulate matter (PM) concentrations of fine (PM 2.5) and coarse (PM10) particles, aerosol optical depth (AOD), wind speed (WS), precipitable water vapor (PWV) data from Riyadh, an arid site in central Saudi Arabia, between 2014 2019 to characterize their variations investigate the influence these variables on...

The variation of aerosols, especially dust aerosol, in time and space plays an important role in climate forcing studies. Aerosols can effectively reduce land surface longwave emission and re-emit energy at a colder temperature, making estimation of downwelling surface longwave radiation (DSLR) with satellite data difficult. Using the latest atmospheric radiative transfer code (MODTRAN 5.0), we...

[1] We continue reconstructing Earth’s radiation budget from global observations in as much detail as possible to allow diagnosis of the effects of cloud (and surface and other atmospheric constituents) variations on it. This new study was undertaken to reduce the most noticeable systematic errors in our previous results (flux data set calculated mainly using International Satellite Cloud Clima...

Abstract The South China Sea (SCS) owns the world's strongest quasi‐biweekly oscillation (QBWO) in boreal summer, but mechanism is still unclear. This case study summarizes two modes of QBWO over summer SCS 2019 by using empirical orthogonal function on 10–20‐day bandpass‐filtered outgoing longwave radiation fields. maximum positive irradiance anomalies for are 90 W m −2 . upward solar and down...

Many global climate models (GCMs) have difficulty in simulating variabilities over high northern latitudes. One of the main reasons is inability GCMs to simulate proper cloud fraction and amount liquid-containing region. This study assessed impact simulation latitudes by comparing long-term parallel simulations Community Atmosphere Model version 6 (CAM6) CAM5, previous version. The results show...

ENSO surface longwave radiation forcing over the tropical Pacific K. G. Pavlakis, D. Hatzidimitriou, E. Drakakis, C. Matsoukas, A. Fotiadi, N. Hatzianastassiou, and I. Vardavas Foundation for Research and Technology-Hellas, Heraklion, Crete, Greece Department of General Applied Science, Technological Educational Institute of Crete, Greece Department of Physics, University of Crete, Crete, Greec...

In this paper, time extension methods, originally designed for clear-sky land surface conditions, are used to estimate high-spatial resolution daily longwave (LW) radiation from the instantaneous Global LAnd Surface Satellite (GLASS) product. The performance of four methods were first tested by using ground based flux measurements that collected 141 global sites. Combined with accuracy LW estim...

The Earth Radiation Budget at the top of the atmosphere quantifies how the Earth gains energy from the Sun and loses energy to space. It is of fundamental importance for climate and climate change. In this paper, the current state-of-the-art of the satellite measurements of the Earth Radiation Budget is reviewed. Combining all available measurements, the most likely value of the Total Solar Irr...