A5049787120- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Aeolian processes and effects
- Particle Dynamics in Fluid Flows
- Spacecraft Design and Technology
- Cyclone Separators and Fluid Dynamics
- Space exploration and regulation
- Aerosol Filtration and Electrostatic Precipitation
- Remote Sensing in Agriculture
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Air Quality and Health Impacts
- Water Quality Monitoring and Analysis
- Meteorological Phenomena and Simulations
- Spacecraft Dynamics and Control
- Fire effects on ecosystems
- COVID-19 impact on air quality
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Aerospace Engineering and Energy Systems
- Soil and Land Suitability Analysis
- Soil Geostatistics and Mapping
Science Systems and Applications (United States)
2015-2025
Goddard Space Flight Center
1999-2018
Hampton University
2009
Naval Research Laboratory Information Technology Division
1999
Universities Space Research Association
1999
We present an overview of the theoretical and algorithmic aspects Ozone Monitoring Instrument (OMI) aerosol surface UV algorithms. Aerosol properties are derived from two independent The nearUV algorithm makes use OMI observations in 350–390 nm spectral region to retrieve information on absorption capacity tropospheric aerosols. OMI‐derived includes Index optical depth at 388 nm. other full UV‐to‐visible coverage derive extinction depth. products include erythemally weighted daily dose as...
Abstract. The height of desert dust and carbonaceous aerosols layers and, to a lesser extent, the difficulty in determining predominant size mode these absorbing aerosol types, are sources uncertainty retrieval properties from near-UV satellite observations. availability independent, near-simultaneous measurements layer height, aerosol-type related parameters derived observations by other A-train sensors, makes possible use this information as input OMI (ozone monitoring instrument)...
Abstract We compare the aerosol single‐scattering albedo (SSA) retrieved by near‐UV two‐channel algorithm (OMAERUV) applied to Aura/Ozone Monitoring Instrument (OMI) measurements with an equivalent inversion made ground‐based Aerosol Robotic Network (AERONET). A recent upgrade of OMAERUV incorporates a modified carbonaceous model, Cloud‐Aerosol Lidar Orthogonal Polarization‐based height climatology, and robust aerosol‐type identification. This paper is first comprehensive effort globally...
Abstract This is the first comprehensive assessment of aerosol optical depth (AOD) product retrieved from near‐UV observations by Ozone Monitoring Instrument (OMI) onboard Aura satellite. The OMI‐retrieved AOD UV algorithm (OMAERUV version 1.4.2) was evaluated using collocated Aerosol Robotic Network (AERONET) level 2.0 direct Sun measurements over 8 years (2005–2012). A time series analysis satellite and ground‐based shows no discernible drift in OMI's calibration. rigorous validation 4...
Abstract A carbonaceous aerosol plume associated with wildfires in British Columbia August 2017 reached the stratosphere a few days following fires onset. The Earth Polychromatic Imaging Camera (EPIC) sensor onboard Deep Space Climate Observatory (DSCOVR) satellite observed spatial and temporal evolution of for about 6 weeks. EPIC's near‐hourly observations Earth's sunlit disk allowed monitoring smoke several times per day. High ultraviolet index values pointed to presence an layer upper...
Abstract. Since about three years after the launch Ozone Monitoring Instrument (OMI) on EOS-Aura satellite, sensor's viewing capability has been affected by what is believed to be an internal obstruction that reduced OMI's spatial coverage. It currently affects half of instrument's 60 positions. In this work we carry out analysis assess effect coverage monthly average values retrieved aerosol optical depth (AOD), single scattering albedo (SSA) and UV Aerosol Index (UVAI) using 2005–2007...
An assessment of the consistency Ozone Monitoring Instrument (OMI) aerosol products with results from other satellite sensors is performed in this paper. The OMI include UltraViolet Aerosol Index (UVAI), Absorption Optical Depth (AAOD), and Extinction (AOD). AOD compared that Aqua/Moderate Resolution Imaging Spectroradiometer (MODIS) Terra/Multiangle (MISR). OMI‐retrieved values are generally biased high respect to MODIS measurements, likely as a result calibration offset. Subpixel cloud...
TROPOspheric Monitoring Instrument (TROPOMI) near-ultraviolet (near-UV) radiances are used as input to an inversion algorithm that simultaneously retrieves aerosol optical depth (AOD), single-scattering albedo (SSA), and the qualitative UV index (UVAI). We first present TROPOMI (TropOMAER), adaptation of currently operational OMI near-UV (OMAERUV OMACA) schemes takes advantage TROPOMI's unprecedented fine spatial resolution at wavelengths availability ancillary aerosol-related information...
The Geostationary Environment Monitoring Spectrometer (GEMS) is scheduled to be in orbit 2019 onboard the GEO-KOMPSAT 2B satellite and will continuously monitor air quality over Asia. GEMS make measurements UV spectrum (300–500 nm) with 0.6 nm resolution. In this study, an algorithm developed retrieve aerosol optical properties from UV-visible for future instrument tested using 3 years of existing OMI L1B data. This provides depth (AOD), single scattering albedo (SSA) layer height (ALH)...
Abstract. Significant inter-annual variability of biomass burning was observed in South America over the 2007–2009 period. The 2007 number fires detected from space America, as well magnitude atmospheric aerosol load resulting fire activity, largest last ten years. huge increase activity followed by large reductions 2008 and 2009 seasons. Large drops carbonaceous aerosols subcontinent, relative to previous years, registered OMI sensor onboard Aura platform, MODIS sensors on Terra Aqua...
Abstract. Accurate estimates of the emissions and distribution black carbon (BC) in region referred to here as Southeastern Asia (70–150° E, 11° S–55° N) are critical studies atmospheric environment climate change. Analysis modeled BC concentrations compared situ observations indicates levels underestimated over most Southeast when using any four different emission inventories. We thus attempt reduce uncertainties improve model simulations by developing top-down, spatially resolved, through...
Abstract. An optimal-estimation(OE)-based aerosol retrieval algorithm using the OMI (Ozone Monitoring Instrument) near-ultraviolet observation was developed in this study. The OE-based has merit of providing useful estimates errors simultaneously with inversion products. Furthermore, instead traditional look-up tables for inversion, it performs online radiative transfer calculations VLIDORT (linearized pseudo-spherical vector discrete ordinate code) to eliminate interpolation and improve...
Ultraviolet (UV) radiation effects on Earth’s ecosystems a global scale can be assessed basis of satellite estimates hyperspectral irradiance the surface and in ocean waters spectral biological weighting functions. The UV algorithms combine retrievals extraterrestrial solar irradiance, cloud/surface reflectivity, aerosol optical depth, total column ozone with radiative transfer computations. assessment in-water requires additional information inherent properties (IOPs) water. Our Ozone...
Currently deployed (GEMS, TEMPO) and soon-to-be launched (S4-UVN) sensors constitute the first GEO satellite constellation for Air Quality observations in northern hemisphere. The simultaneous availability of similar from platforms at LEO L1 orbital configurations offers a unique  opportunity integration quasi-global  observing system. In this presentation, we will discuss specific aerosol events to show complementary nature those (S5P-TROPOMI S5-UVNS), Langrange1-EPIC...
Abstract. This work provides a comparison of satellite retrievals Saharan desert dust aerosol optical depth (AOD) during strong event through March 2006. In this event, large plume was transported over desert, vegetated, and ocean surfaces. The aim is to identify the differences between current datasets. instruments considered are AATSR, AIRS, MERIS, MISR, MODIS, OMI, POLDER, SEVIRI. An interesting aspect that different algorithms make use instrument characteristics obtain bright These...
Abstract. Aerosol–cloud interaction continues to be one of the leading uncertain components climate models, primarily due lack adequate knowledge complex microphysical and radiative processes aerosol–cloud system. Situations when light-absorbing aerosols such as carbonaceous particles windblown dust overlay low-level cloud decks are commonly found in several regions world. Contrary known cooling effects these cloud-free scenario over darker surfaces, an overlapping situation absorbing can...
Abstract. We provide an analysis of the commonly used Ozone Monitoring Instrument (OMI) aerosol index (AI) product for qualitative detection presence and loading absorbing aerosols. In our analysis, simulated top-of-atmosphere (TOA) radiances are produced at OMI footprints from a model atmosphere profile provided by NASA Goddard Earth Observing System (GEOS-5) Modern-Era Retrospective Analysis Research Applications reanalysis (MERRAero). Having established credibility MERRAero simulation AI...
Atmospheric aerosols are significant sources of uncertainty in air mass factor (AMF) calculations for trace gas retrievals using ultraviolet measurements from space. Current typically do not consider explicitly as cloud products partially account aerosol effects. Here, we propose a new measurement‐based approach to correct the AMF calculation, apply it Ozone Monitoring Instrument (OMI) formaldehyde (HCHO) and quantify aerosol‐induced HCHO vertical column density difference three types...
Abstract A soil map is one of the key data layers for developing a robust global model and evaluating land quality use. current produced by conventional survey major source information. However, such may not provide desired accuracy in terms scale cartographic as digital format geographic information system (GIS) modeling applications. This study was designed to introduce test procedures improving objectivity delineation patterns with use hyperspectral imagery. These were analyzed through...
Abstract Frequent observations of aerosols from space are essential for studying aerosol effects on climate and air quality applications. We present results properties derived made by the Earth Polychromatic Imaging Camera (EPIC) sensor onboard Deep Space Climate Observatory satellite. EPIC's near‐hourly measured radiances at 340 388 nm sun rise to sunset have been used as input EPIC near‐UV algorithm (EPICAERUV) retrieving extinction optical depth (AOD), single scattering albedo (SSA),...
Abstract. The height of desert dust and carbonaceous aerosols layers and, to a lesser extent, the difficulty in determining predominant size mode these absorbing aerosol types, are sources uncertainty retrieval properties from near UV satellite observations. availability independent, near-simultaneous measurements layer height, aerosol-type related parameters derived observations by other A-train sensors, makes possible use this information as input OMI (Ozone Monitoring Instrument)...
This analysis presents comparisons of upper‐stratosphere ozone information observed by two independent systems: the Solar Backscatter UltraViolet (SBUV and SBUV/2) satellite instruments, ground‐based Dobson spectrophotometers. Both new SBUV Version 8 UMK04 profile retrieval algorithms are optimized for studying long‐term variability trends in ozone. Trend analyses time series from SBUV(/2) data set complex because multiple instruments involved, changes instruments' geo‐location, short...
Abstract. TROPOMI near UV radiances are used as input to an inversion algorithm that simultaneously retrieves aerosol optical depth (AOD) and single scattering albedo (SSA) well the improved qualitative Aerosol Index (UVAI) accurately accounts for effects of water clouds. We first present (TropOMAER), adaptation currently operational OMI (OMAERUV & OMACA) schemes, take advantage TROPOMI’s unprecedented fine spatial resolution availability ancillary aerosol-related information derive...