A5049228917- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Calibration and Measurement Techniques
- Air Quality Monitoring and Forecasting
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Remote Sensing in Agriculture
- Oil Spill Detection and Mitigation
- Solar Radiation and Photovoltaics
- Radiative Heat Transfer Studies
- Impact of Light on Environment and Health
- Planetary Science and Exploration
- Fire effects on ecosystems
- Vehicle emissions and performance
- Space exploration and regulation
- Advanced Aircraft Design and Technologies
- Geophysics and Gravity Measurements
- Climate variability and models
- Marine and coastal ecosystems
- Ocular and Laser Science Research
- Satellite Image Processing and Photogrammetry
- Remote Sensing and LiDAR Applications
University of Oklahoma
2018-2025
Ames Research Center
2011-2020
Bay Area Environmental Research Institute
2005-2020
University of Miami
2016
University of Exeter
2016
University of Washington
2016
North-West University
2016
University of Namibia
2016
Laboratoire Interuniversitaire des Systèmes Atmosphériques
2016
NASA Research Park
2009-2016
Abstract. Recent results from diverse air, ground, and laboratory studies using both radiometric in situ techniques show that the fractions of black carbon, organic matter, mineral dust atmospheric aerosols determine wavelength dependence absorption (often expressed as Absorption Angstrom Exponent, or AAE). Taken together, these hold promise improving information on aerosol composition remote measurements. The main purpose this paper is to AAE values for an Aerosol Robotic Network (AERONET)...
Abstract. We have determined the solar spectral absorption optical depth of atmospheric aerosols for specific case studies during several field programs (three cases been reported previously; two are new results). combined airborne measurements net radiant flux density and aerosol with a detailed radiative transfer model all but one cases. The (SAFARI 2000, ACE Asia, PRIDE, TARFOX, INTEX-A) contained representing major absorbing types: pollution, biomass burning, desert dust mixtures. In...
Abstract. Southern Africa produces almost a third of the Earth's biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) 5-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three intensive observation periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June–October), reaching 3–5...
CORRESPONDING AUTHOR: Paquita Zuidema, Rosenstiel School of Marine and Atmospheric Science, University Miami, FL, 33149, E-mail: pzuidema@rsmas.miami.edu
Abstract The Studies of Emissions and Atmospheric Composition, Clouds Climate Coupling by Regional Surveys (SEAC 4 RS) field mission based at Ellington Field, Texas, during August September 2013 employed the most comprehensive airborne payload to date investigate atmospheric composition over North America. NASA ER‐2, DC‐8, SPEC Inc. Learjet flew 57 science flights from surface 20 km. ER‐2 seven remote sensing instruments as a satellite surrogate eight in situ instruments. DC‐8 23 five for...
The North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) is an interdisciplinary investigation to improve understanding of Earth's ocean ecosystem-aerosol-cloud system. Specific overarching science objectives for NAAMES are (1) characterize plankton ecosystem properties during primary phases the annual cycle their dependence on environmental forcings, (2) determine how these interact recreate each year conditions bloom, (3) resolve remote marine aerosols boundary layer clouds...
Abstract. The total effect of aerosols, both directly and on cloud properties, remains the biggest source uncertainty in anthropogenic radiative forcing climate. Correct characterization intensive aerosol optical particularly conditions where absorbing is present, a crucial factor quantifying these effects. southeast Atlantic Ocean (SEA), with seasonal biomass burning smoke plumes overlying mixing persistent stratocumulus deck, offers an excellent natural laboratory to make observations...
Abstract. The representations of clouds, aerosols, and cloud–aerosol–radiation impacts remain some the largest uncertainties in climate change, limiting our ability to accurately reconstruct past predict future climate. south-east Atlantic is a region where high atmospheric aerosol loadings semi-permanent stratocumulus clouds are co-located, providing an optimum for studying full range aerosol–radiation aerosol–cloud interactions their perturbations Earth's radiation budget. While satellite...
Abstract The Chesapeake Lighthouse Aircraft Measurements for Satellites (CLAMS) experiment took place from 10 July to 2 August 2001 in a combined ocean–land region that included the [Clouds and Earth’s Radiant Energy System (CERES) Ocean Validation Experiment (COVE)] Wallops Flight Facility (WFF), both along coastal Virginia. This was designed mainly validating instruments algorithms aboard Terra satellite platform, including Moderate Resolution Imaging Spectroradiometer (MODIS). Over ocean,...
Abstract Classifying observed aerosols into types (e.g., urban‐industrial, biomass burning, mineral dust, maritime) helps to understand aerosol sources, transformations, effects, and feedback mechanisms; improve accuracy of satellite retrievals; quantify radiative impacts on climate. The number parameters retrieved from spaceborne sensors has been growing, the initial optical depth (AOD) at one or a few wavelengths list that now includes AOD, complex refractive index, single scattering...
Abstract. Simulations are performed for the period 2000–2015 by two different regional climate models, ALADIN and RegCM, to quantify direct semi-direct radiative effects of biomass-burning aerosols (BBAs) in southeast Atlantic (SEA) region. Different simulations have been using strongly absorbing BBAs accordance with recent situ observations over SEA. For July–August–September (JAS) season, single scattering albedo (SSA) total aerosol optical depth (AOD) simulated RegCM models consistent...
Abstract. The Cloud Aerosol LIdar with Orthogonal Polarization (CALIOP), on board the CALIPSO platform, has measured profiles of total attenuated backscatter coefficient (level 1 products) since June 2006. CALIOP's level 2 products, such as aerosol and extinction profiles, are retrieved using a complex succession automated algorithms. goal this study is to help identify potential shortcomings in CALIOP version product illustrate some motivation for changes that have been introduced next data...
Abstract. The southeastern Atlantic (SEA) and its associated cloud deck, off the west coast of central Africa, is an area where aerosol–cloud interactions can have a strong radiative impact. Seasonally, extensive biomass burning (BB) aerosol plumes from southern Africa reach this area. NASA ObseRvations Aerosols above CLouds their intEractionS (ORACLES) study focused on quantitatively understanding these importance. Here we present measurements condensation nuclei (CCN) concentration, size...
Abstract We couple airborne, ground‐based, and satellite observations; conduct regional simulations; develop apply an inversion technique to constrain hourly smoke emissions from the Rim Fire, third largest observed in California, USA. Emissions constrained with multiplatform data show notable nocturnal enhancements (sometimes over a factor of 20), correlate better daily burned area data, are 2–4 higher than priori estimates, highlighting need for improved characterization diurnal profiles...
Abstract. Southern Africa produces almost a third of the Earth’s biomass burning (BB) aerosol particles, yet fate these particles and their influence on regional global climate is poorly understood. ORACLES (ObseRvations Aerosols above CLouds intEractionS) five-year NASA EVS-2 (Earth Venture Suborbital-2) investigation with three Intensive Observation Periods designed to study key atmospheric processes that determine impacts aerosols. During Hemisphere winter spring (June-October), reaching...
Abstract. We examine the relationship between number concentration of boundary-layer cloud condensation nuclei (CCN) and light extinction to investigate underlying aerosol processes satellite-based CCN estimates. For a variety airborne ground-based observations not dominated by dust, regression identifies (cm−3) at 0.4 ± 0.1% supersaturation with 100.3α +1.3σ0.75 where σ (Mm−1) is 500 nm coefficient dried particles α Angstrom exponent. The deviation 1 km horizontal average data from this...
Abstract. In the southeast Atlantic, well-defined smoke plumes from Africa advect over marine boundary layer cloud decks; both are most extensive around September, when of resides in free troposphere. A framework is put forth for evaluating performance a range global and regional atmospheric composition models against observations made during NASA ORACLES (ObseRvations Aerosols above CLouds their intEractionS) airborne mission September 2016. strength comparison focus on spatial distribution...
Abstract. Over the past 24 years, AErosol RObotic NETwork (AERONET) program has provided highly accurate remote-sensing characterization of aerosol optical and physical properties for an increasingly extensive geographic distribution including all continents many oceanic island coastal sites. The measurements retrievals from AERONET global network have addressed satellite model validation needs very well, but there been challenges in making comparisons to similar parameters situ surface...
Abstract. The southeast Atlantic (SEA) region is host to a climatologically significant biomass burning aerosol layer overlying marine stratocumulus. We present the first results of directly measured above-cloud optical depth (ACAOD) from recent ObseRvations Aerosols above CLouds and their intEractionS (ORACLES) airborne field campaign during August September 2016. In our analysis, we use data Spectrometers for Sky-Scanning Sun-Tracking Atmospheric Research (4STAR) instrument found an...
Abstract. Biomass burning smoke is advected over the southeastern Atlantic Ocean between July and October of each year. This plume overlies mixes into a region persistent low marine clouds. Model calculations climate forcing by this vary significantly in both magnitude sign. NASA EVS-2 (Earth Venture Suborbital-2) ORACLES (ObseRvations Aerosols above CLouds their intEractionS) had deployments for field campaigns off west coast Africa 3 consecutive years (September 2016, August 2017, 2018)...
Abstract. In southern Africa, widespread agricultural fires produce substantial biomass burning (BB) emissions over the region. The seasonal smoke plumes associated with these are then advected westward persistent stratocumulus cloud deck in southeast Atlantic (SEA) Ocean, resulting aerosol effects which vary time and location. Much work has focused on of plumes, but previous studies have also described an elevated free tropospheric water vapor signal SEA. Water influences climate its own...
Abstract. Global measurements of absorbing aerosol optical depth (AAOD) are scarce and mostly provided by the ground network AERONET (AErosol RObotic NETwork). In recent years, several satellite products AAOD have been developed. This study's primary aim is to establish usefulness these datasets for AEROCOM (Aerosol Comparisons between Observations Models) model evaluation with a focus on years 2006, 2008 2010. The super-observations consisting 1∘×1∘×30 min aggregated retrievals. study...
The lifecycle of black carbon (BC)-containing particles from biomass burns is examined using aircraft and surface observations the BC mixing state for plume ages ∼15 min to 10 days. Because nonvolatile chemically inert, changes in BC-containing are driven solely by particle coating, which mainly secondary organic aerosol (SOA). coating mass initially increases rapidly (kgrowth = 0.84 h–1), then remains relatively constant 1–2 days as dilution no longer supports further growth, decreases...
Abstract Aerosol forcing uncertainty represents the largest climate overall. Its magnitude has remained virtually undiminished over past 20 years despite considerable advances in understanding most of key contributing elements. Recent work produced modest increases only confidence estimate itself. This review summarizes contributions toward reducing aerosol made by satellite observations, measurements taken within atmosphere, as well modeling and data assimilation. We adopt a more...
Abstract The extensive set of measurements performed during the Chesapeake Lighthouse and Aircraft Measurements for Satellites (CLAMS) experiment provides a unique opportunity to evaluate aerosol retrievals over ocean from multiangle, multispectral photometric, polarimetric remote sensing observations by airborne Research Scanning Polarimeter (RSP) instrument. Previous studies have shown feasibility retrieving particle size distributions real refractive indices such visible wavelengths...