About
22
Publications
764
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
62
Citations
Publications
Publications (22)
The Clouds and the Earth’s Radiant Energy System (CERES) Energy Balanced and Filled (EBAF) Edition 4.1 data product provides global surface irradiances. Uncertainties in the global and regional monthly and annual mean all-sky net shortwave, longwave, and shortwave plus longwave (total) irradiances are estimated using ground-based observations. Erro...
The wide field of view instrument on Earth Radiation Budget Experiment (ERBE) Earth Radiation Budget Satellite (ERBS) took measurements from November 1984 through September 1999. It provides top-of-atmosphere (TOA) reflected shortwave and emitted longwave irradiance at a 10 degree by 10 degree spatial resolution. We have recently re-processed ERBS...
This study examines the sensitivity of surface irradiances to cloud properties derived from satellite sensors. Surface irradiances were computed in two different ways, one using cloud properties solely from MODerate resolution Imaging Spectroradiometer (MODIS), and the other using MODIS data supplemented with CALIPSO and CloudSat cloud vertical str...
Knowledge of the vertical cloud distribution is important for a variety of climate and weather applications. The cloud overlapping variations greatly influence the atmospheric heating/cooling rates, with implications for the surface-troposphere radiative balance, global circulation and precipitation. Additionally, an accurate knowledge of the multi...
This work evaluates the multilayer cloud (MCF) algorithm based on CO2-slicing techniques against CALISPO-CloudSat (CLCS) measurement. This evaluation showed that the MCF underestimates the presence of multilayered clouds compared with CLCS and are retrained to cloud emissivities below 0.8 and cloud optical septs no larger than 0.3.
The behavior of the atmospheric downward longwave radiation at the surface under overcast conditions is studied. For optically thick clouds, longwave radiation depends greatly on the cloud base height (CBH), besides temperature and water vapor profiles. The CBH determines the cloud emission temperature and the air layers contributing to the longwav...
Accurate estimates of the Top of the Atmosphere (TOA) and surface radiative budgets are needed to understand the energy flow within the earth system. Earlier studies indicate that change of hydrological cycle is driven by the change of the net surface irradiance. The net shortwave irradiance is a critical component in estimating heat balance of sno...
Aerosols and clouds are strongly related as drivers of the terrestrial energy budget and therefore with weather and climate. Significant progress has been made in this field due to improved ground-based and satellite measurements that provide a better understanding of the different interactions between aerosols and clouds for various physical proce...
Clouds play an important role in understanding the global energy budget
and in its role in determining climate variability present and future.
In order to produce accurate estimates for the radiative fluxes, one of
the main requirements is to describe as much realistic as possible the
spatial and temporal distributions of clouds. To date, the
satel...
Clouds cover spatial and temporally most of the Earth surface and therefore have a strong modulating influence on the radiative exchange between the TOA and surface. From this radiative exchange, the surface Longwave Radiative Fluxes (LRFs) are an important component in the Earth’s energy budget and, also are strongly related with the greenhouse ef...
Accurate estimates of the cloud radiative effect and greenhouse effect
are required to better estimate the climate variability on regional and
global scales. The radiation budget at the surface is a key interface
for energy exchange and therefore for detecting climate change. Surface
longwave radiative fluxes (LRFs) are an important component of th...
This study assesses the surface Longwave Radiative Fluxes (LRFs) estimated by two different projects: the GEWEX (Global Energy and Water Cycle Experiment) SRB (Surface Radiative Budget) Release 3.1 and C3M (CALIPSO-CloudSat-CERES-MODIS). Comparisons between two GEWEX SRB flux algorithms and C3M are made during an overlapping time period for the yea...
Surface radiative fluxes are a key driver of the terrestrial energy budget; among these the fluxes, the downward longwave radiative fluxes (DLF) are an important component of estimating the Earth's greenhouse effect and therefore the climate variability. Meanwhile direct observations of surface irradiances are limited of a ground sites over the lan...
Downward atmospheric longwave radiation (DLR) is an important component
of the terrestrial energy budget, strongly related with the greenhouse
effect and therefore remarkably affecting the climate. In this study,
DLR at the surface has been calculated using a one-dimensional radiative
transfer model, Santa Barbara DISORT Atmospheric Radiative Trans...
In this study we analyze the behaviour of Downwelling Longwave (atmospheric, in-frared) Radiation (DLR) at the terrestrial surface, during clear sky conditions. This irradiance is estimated by using the unidimensional radiative transfer model SBDART (Ricchiazzi et al, 1998) and afterwards compared with measurements taken at Girona, NE of the Iberia...
ADVERTIMENT. La consulta d'aquesta tesi queda condicionada a l'acceptació de les següents condicions d'ús: La difusió d'aquesta tesi per mitjà del servei TDX ha estat autoritzada pels titulars dels drets de propietat intel·lectual únicament per a usos privats emmarcats en activitats d'investigació i docència. No s'autoritza la seva reproducció amb...
Projects
Projects (4)
The Earth Radiation Budget Experiment (ERBE) was a National Aeronautics and Space Administration (NASA) space mission dedicated for measuring the Earth’s top-of-atmosphere (TOA) broadband radiation fields using a constellation of three satellites (ERBS, NOAA-9, NOAA-10). The goal of this project was to better understand the Earth’s climate by tracking the spatial patterns and temporal variability of the Earths radiation fields. Earth Radiation Budget Experiment (ERBE) Wide-Field-of-View (WFOV) nonscanner instrument onboard Earth Radiation Budget Satellite (ERBS) provided critical 15-year outgoing broadband irradiances at the top of atmosphere (TOA) from 1985 to 1999 for studying Earth’s climate. This project reprocesses the ERBE Wide-Field-of-View (WFOV) nonscanner Edition4 (Ed4) data product for the ERBS satellite.The final goal is complete and update the ERBE data with the current CERES data and create the largest data time series for the Earth Radiation budget from 1985 to the present day.
Quantify the sensitivity of surface irradiances to cloud properties derived from satellite sensors. Surface irradiances are computed in two different ways, one using cloud properties solely from MODerate resolution Imaging Spectroradiometer (MODIS), and the other using MODIS data supplemented with CALIPSO and CloudSat cloud vertical structure information.
