A5092064967- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Solar Radiation and Photovoltaics
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Radioactivity and Radon Measurements
- Infrared Target Detection Methodologies
- Impact of Light on Environment and Health
- Aeolian processes and effects
- Photovoltaic System Optimization Techniques
- Plant responses to elevated CO2
- Wind Energy Research and Development
- Remote Sensing in Agriculture
- Geochemistry and Geologic Mapping
- Air Quality Monitoring and Forecasting
Universidad de Valladolid
2021-2024
Abstract. The lack of aerosol optical depth (AOD) data at night can be partially addressed through moon photometer measurements or fully covered with star observations. However, the limited availability and complexity photometers has motivated this study to use all-sky cameras extract starlight signals derive AOD using photometry. For purpose, eight were configured deployed in nine different locations capture raw images varying exposure times every 2 minutes during night. This work proposes...
The Mediterranean Basin is one of the sunniest regions globally, offering high potential for solar energy production. This makes production from photovoltaics a cornerstone to efforts countries decarbonization. Under cloudless skies, dust aerosols are among main attenuators surface radiation in Mediterranean. Over role can be even more significant than that clouds.In this study we used various earth observation products (from IASI, MODIS, CALIPSO), lidar aerosol extinction profiles, and...
Abstract. This work introduces CAECENET, a new system capable of automatically retrieving columnar and vertically-resolved aerosol properties running the GRASP (Generalized Retrieval Atmosphere Surface Properties) algorithm using sun-sky photometer (aerosol optical depth, AOD; sky radiance measurements) ceilometer (range corrected signal; RCS) data as input. method, so called GRASPpac, is implemented in which assimilates photometers from CÆLIS database ICENET (Iberian Ceilometer Network)....
Abstract We present a new model based on convolutional neural network (CNN) to predict daytime cloud cover (CC) from sky images captured by all‐sky cameras, which is called CNN‐CC. A total of 49,016 images, recorded at different Spanish locations (Valladolid, La Palma, and Izaña) two camera types, are manually classified into CC (oktas) values trained researchers. Subsequently, the randomly split training set test validate model. The predicted CNN‐CC compared with observations made people...
Abstract. This study explores the potential to retrieve aerosol properties with GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements zenith sky radiance (ZSR), which are values measured in direction, recorded at four wavelengths by a ZEN-R52 radiometer. To this end, ZSR 440, 500, 675 870 nm (ZSRZEN), installed Valladolid (Spain), is employed. instrument calibrated intercomparing signal each channel coincident simulated (ZSRSIM) same...
The present work proposes a new model based on convolutional neural network (CNN) to retrieve solar shortwave (SW) irradiance via the estimation of cloud modification factor (CMF) from daytime sky images captured by all-sky cameras; this is named CNN-CMF. To end, total 237,669 paired with SW measurements obtained using pyranometers were selected at following three sites: Valladolid and Izaña, Spain, Lindenberg, Germany. This dataset was randomly split into training testing sets, latter...
This work introduces CAECENET, a new system capable of automatically retrieving columnar and vertically-resolved aerosol properties running the GRASP (Generalized Retrieval Atmosphere Surface Properties) algorithm using sun-sky photometer (aerosol optical depth, AOD; sky radiance measurements) ceilometer (range corrected signal; RCS) data as input. method, so called pac , is implemented in which assimilates photometers from CÆLIS database ICENET (Iberian Ceilometer Network). CAECENET allows...
Aerosol optical depth (AOD) at night-time has become a hot topic in recent years due to the development of new instruments recording accurate ground-based lunar irradiance measurements, and calibration methods extraterrestrial models adapted photometry. This study uses all daytime AOD data available Valladolid (Spain) from October 2016 March 2022 order analyze its behavior added contribution night data. The annual, monthly daily evolution is studied comparing values checking correlation...
Abstract. This study explores the potential to retrieve aerosol properties with GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements zenith sky radiance (ZSR), which are radiances measured in direction, recorded at four wavelengths by a ZEN-R52 radiometer. To this end, ZSR 440, 500, 675 870 nm (ZSRZEN), installed Valladolid (Spain), is employed. instrument calibrated intercomparing signal each channel coincident values simulated (ZSRSIM)...
The Mediterranean Basin is one of the sunniest regions globally. Thus, aerosols, and especially dust, play a key role in radiative transfer processes atmosphere, which locally can be comparable to or even more significant than clouds. physical (i.e., size, shape) chemical (e.g., composition) properties dust that transported across depend strongly on its origin, as well ageing mixing with other atmospheric constituents. For instance, anthropogenic particles alter composition hygroscopicity/...
Mineral dust stands out as a pivotal climate modulator due to its substantial mass, optical depth, and long-term atmospheric life cycle. It impacts the radiative balance, influences cloud dynamics precipitation patterns, exerts notable effects on terrestrial aquatic ecosystems well human health. The extent intensity of these are governed by mineral composition particles sourced from diverse regions worldwide. METAL-WRF is an advanced numerical framework extending GOCART-AFWA scheme in...
<p>Atmospheric aerosols are an important forcing agent in the estimation of radiative budget, being Arctic area special weakness. The Group Atmospheric Optics, University Valladolid and Alfred Wegener Institute for Polar Marine Research, installed 2017 a CE-318T Sun-sky-Moon  photometer (Cimel Electronique S.A.S) station Ny-Ålesund (79ºN, 12ºE). This study presents inventory all high-turbidity aerosol episodes recorded period...
<p><span><span>Long range transported aerosol from biomass burning affects polar regions, especially the Arctic. The frequency and intensity of bushfires in context a warming climate has been pointed out last report Intergovernmental Panel on Climate Change. In high latitudes, these events impact large areas through long-range transport smoke particles troposphere or even stratosphere. lifetime radiative are related with height plumes processes that...