Mendeley Climate Change Library
29
29
Jul 5, 2019
07/19
by
A. C. Kalogridis; O. B. Popovicheva; G. Engling; E. Diapouli; K. Kawamura; E. Tachibana; K. Ono; V. S. Kozlov; K. Eleftheriadis
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Vegetation open fires constitute a significant source of particulate pollutants on a global scale and play an important role in both atmospheric chemistry and climate change. To better understand the emission and aging characteristics of smoke aerosols, we performed small-scale fire experiments using the Large Aerosol Chamber (LAC, 1800 m3) with a focus on biomass burning from Siberian boreal coniferous forests. A series of burn experiments were conducted with typical Siberian biomass (pine and...
Topics: Aerosol emission factors, Aging in dark conditions, Biomass burning, Chamber experiments,...
450
450
Jun 1, 2011
06/11
by
Addy, Harold E., Jr.; Broeren, Andy P.; Zoeckler, Joesph G.; Lee, Sa
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Aerodynamic wind tunnel tests were conducted to study the effects of various ice accretions on the aerodynamic performance of a 36-inch chord, two-dimensional business jet airfoil. Eight different ice shape configurations were tested. Four were castings made from molds of ice shapes accreted in an icing wind tunnel. Two were made using computationally smoothed tracings of two of the ice shapes accreted in the icing tunnel. These smoothed profiles were then extended in the spanwise direction to...
Topics: OZONE, ADIABATIC CONDITIONS, TROPOSPHERE, SMOKE, AIR WATER INTERACTIONS, LONG WAVE RADIATION,...
Mendeley Climate Change Library
20
20
Jul 5, 2019
07/19
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Aditya Kumar; Shiliang Wu; Yaoxian Huang; Hong Liao; Jed O. Kaplan
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We estimate the global Hg wildfire emissions for the 2000s and the potential impacts from the 2000–2050 changes in climate, land use and land cover and Hg anthropogenic emissions by combining statistical analysis with global data on vegetation type and coverage as well as fire activities. Global Hg wildfire emissions are estimated to be 612 Mg year −1 . Africa is the dominant source region (43.8% of global emissions), followed by Eurasia (31%) and South America (16.6%). We find significant...
Topics: Biomass burning, Climate change, Land cover, Land use, Modeling
Mendeley Climate Change Library
20
20
Jul 6, 2019
07/19
by
Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda; Adriana Gioda
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For a long time, firewood was the only source of energy available for cooking, heating, and protection. Currently, new forms of energy, such as liquefied petroleum gas (LPG) and electricity, have replaced the use of firewood. However, this fuel is still part of the energy matrix of many countries, including Brazil. Its use in cooking activities generates particles and gases that can have an impact on global warming and health. The objective of this study was to evaluate the use of firewood...
Topics: Biomass burning, Consumption per capita, Firewood, Greenhouse gas emissions, Solid fuels, Wood fuel
223
223
Jun 11, 2011
06/11
by
Bar-Itzhack, Itzhack Y.; Harman, Richard R
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This paper presents the overall mathematical model and results from pseudo linear recursive estimators of attitude and rate for a spinning spacecraft. The measurements considered are vector measurements obtained by sun-sensors, fixed head star trackers, horizon sensors, and three axis magnetometers. Two filters are proposed for estimating the attitude as well as the angular rate vector. One filter, called the q-Filter, yields the attitude estimate as a quaternion estimate, and the other filter,...
Topics: ATMOSPHERIC CHEMISTRY, CYANIDES, HYDROGEN, HYDROCYANIC ACID, ATMOSPHERIC MODELS, BIOMASS BURNING,...
Mendeley Climate Change Library
19
19
Jul 6, 2019
07/19
by
Caiqing Yan; Amy P. Sullivan; Yuan Cheng; Mei Zheng; Yuanhang Zhang; Tong Zhu; Jeffrey L. Collett
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Although biogenic aerosols play important roles in atmospheric processes and climate change, their contributions to atmospheric particulate matter mass have not received much attention, partly due to the difficulty in identifying key aerosol components and due to the often dominant role of anthropogenic emissions. In order to estimate contributions of biogenic and biomass burning organic aerosols to atmospheric particles, fine particulate matter (PM 2.5 ) samples were collected simultaneously...
Topics: Biogenic, Biomass burning, North China plain, Rural/urban, Saccharide, Secondary organic aerosol
Mendeley Climate Change Library
23
23
Jul 5, 2019
07/19
by
Casey D. Bray; William Battye; Viney P. Aneja; Daniel Q. Tong; Pius Lee; Youhua Tang
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This study quantifies ammonia (NH 3 ) emissions from biomass burning from 2005 to 2015 across the continental US (CONUS) and compares emissions from biomass burning with the US Environmental Protection Agency (EPA) National Emissions Inventory (NEI), the Fire Inventory from the National Center for Atmospheric Research (FINN) and the Global Fire Emissions Database (GFED). A statistical regression model was developed in order to predict NH 3 emissions from biomass burning using a combination of...
Topics: Ammonia, Biomass burning, Fire emissions, National emissions inventory, Wildfires
483
483
May 31, 2011
05/11
by
Crivellini, A.; Golubev, V.; Mankbadi, R.; Scott, J. R.; Hixon, R.; Povinelli, L
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The nonlinear response of symmetric and loaded airfoils to an impinging vortical gust is investigated in the parametric space of gust dimension, intensity, and frequency. The study, which was designed to investigate the validity limits for a linear analysis, is implemented by applying a nonlinear high-order prefactored compact code and comparing results with linear solutions from the GUST3D frequency-domain solver. Both the unsteady aerodynamic and acoustic gust responses are examined.
Topics: BIOMASS BURNING, LEAVES, PLANTS (BOTANY), CLUSTER ANALYSIS, MULTIVARIATE STATISTICAL ANALYSIS,...
247
247
Jun 9, 2011
06/11
by
Diskin, Glenn S.; Lempert, Walter R.; Miles, Richard B
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A three level model has been developed for the analysis of Schumann-Runge band (B(sup 3)Sigma(sup -)(sub u ) (- X(sup 3)Sigma(sup -)(sub g)) laser-induced fluorescence of molecular oxygen, O2. Such a model is required due to the severe lower state depletion which can occur when transitions having relatively large absorption cross-sections are excited. Such transitions are often utilized via ArF or KrF excimer or dye-laser excitation in high temperature environments. The rapid predissociation of...
Topics: TROPOSPHERE, CORRELATION COEFFICIENTS, SOUTHEAST ASIA, ANNUAL VARIATIONS, BIOMASS BURNING,...
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260
Jun 9, 2011
06/11
by
Finzi, Alberto; Ingrand, Felix; Muscettola, Nicol
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This paper reports on the design and implementation of a real-time executive for a mobile rover that uses a model-based, declarative approach. The control system is based on the Intelligent Distributed Execution Architecture (IDEA), an approach to planning and execution that provides a unified representational and computational framework for an autonomous agent. The basic hypothesis of IDEA is that a large control system can be structured as a collection of interacting agents, each with the...
Topics: CARBON MONOXIDE, METHANE, BIOMASS BURNING, ANNUAL VARIATIONS, AIR MASSES, PHOTOCHEMICAL REACTIONS,...
1,309
1.3K
May 29, 2011
05/11
by
Glass, Christopher E
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An uncoupled Computational Fluid Dynamics-Direct Simulation Monte Carlo (CFD-DSMC) technique is developed and applied to provide solutions for continuum jets interacting with rarefied external flows. The technique is based on a correlation of the appropriate Bird breakdown parameter for a transitional-rarefied condition that defines a surface within which the continuum solution is unaffected by the external flow-jet interaction. The method is applied to two problems to assess and demonstrate...
Topics: AEROSOLS, OXIDATION, TROPOSPHERE, CHEMICAL COMPOSITION, DATA BASES, BIOMASS BURNING, TROPICAL...
437
437
Jun 11, 2011
06/11
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Jeram, Geoffrey J
texts
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This Open Platform for Limit Protection guides the open design of maneuver limit protection systems in general, and manned, rotorcraft, aerospace applications in particular. The platform uses three stages of limit protection modules: limit cue creation, limit cue arbitration, and control system interface. A common set of limit cue modules provides commands that can include constraints, alerts, transfer functions, and friction. An arbitration module selects the ''best'' limit protection cues and...
Topics: BIOMASS BURNING, ARID LANDS, GRASSLANDS, AFRICA, SATELLITE IMAGERY, ANNUAL VARIATIONS, NIGHT,...
112
112
May 29, 2011
05/11
by
Kwan, Aiyueh; Bedrossian, Nazareth; Jan, Jiann-Woei; Grigoriadis, Karolo
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Recent results show that the peak transient response of a linear system to bounded energy inputs can be computed using the energy-to-peak gain of the system. However, analytically computed peak response bound can be conservative for a class of class bounded energy signals, specifically pulse trains generated from jet firings encountered in space vehicles. In this paper, shaping filters are proposed as a Methodology to reduce the conservatism of peak response analytic bounds. This Methodology...
Topics: ATMOSPHERIC RADIATION, BIOMASS BURNING, AEROSOLS, MODELS, PARAMETERIZATION, ENERGY BUDGETS,...
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303
May 31, 2011
05/11
by
Laird, William M.; Fauconneau, Gu
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Previous investigations have demonstrated the importance of the effect of linearly varying axial or in-plane loading on the vibration characteristics of beams and flat plates. It has already been established that the problem reduces to solving for the eigenvalues of a fourth order, variable coefficient differential equation that can not be solved in closed form. Beginning with a variational representation of the eigenvalue problem, methods are discussed by which both upper and lower bounds for...
Topics: RADIATIVE TRANSFER, UNITED STATES, BIOMASS BURNING, SIZE DISTRIBUTION, HUMIDITY, REFRACTIVITY,...
248
248
May 29, 2011
05/11
by
Liu, Ansheng; Chuang, S.-L.; Ning, C. Z
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Second-order nonlinear optical processes including second-harmonic generation, optical rectification, and difference-frequency generation associated with intersubband transitions in wurtzite GaN/AlGaN quantum well (QW) are investigated theoretically. Taking into account the strain-induced piezoelectric (PZ) effects, we solve the electronic structure of the QW from coupled effective-mass Schrodinger equation and Poisson equation including the exchange-correlation effect under the local-density...
Topics: AEROSOLS, ATMOSPHERIC EFFECTS, BIOMASS BURNING, MADAGASCAR, OZONE, TROPOSPHERE, ATMOSPHERIC...
About one-half of the global CO2 emissions from fossil fuel combustion and deforestation accumulates in the atmosphere, where it contributes to global warming. The rest is taken up by vegetation and the ocean. The precise contribution of the two sinks, and their location and year-to-year variability are, however, not well understood. We use two different approaches, batch Bayesian synthesis inversion and variational data assimilation, to deduce the global spatiotemporal distributions of CO2...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC COMPOSITION, CARBON DIOXIDE, DEFORESTATION,...
We conduct several sets of simulations with a version of NASA's Goddard Earth Observing System, version 5, (GEOS-5) Atmospheric Global Climate Model (AGCM) equipped with a two-moment cloud microphysical scheme to understand the role of biomass burning aerosol (BBA) emissions in Southeast Asia (SEA) in the pre-monsoon period of February-May. Our experiments are designed so that both direct and indirect aerosol effects can be evaluated. For climatologically prescribed monthly sea surface...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, RAIN, BIOMASS BURNING, ATMOSPHERIC CIRCULATION,...
Meteorological conditions, extremely conducive to fire development and spread in the spring of 1987, resulted in forest fires burning over extremely large areas in the boreal forest zone in northeastern China and the southeastern region of Siberia. The great China fire, one of the largest and most destructive forest fires in recent history, occurred during this period in the Heilongjiang Province of China. Satellite imagery is used to examine the development and areal distribution of 1987...
Topics: NASA Technical Reports Server (NTRS), CHINA, FOREST FIRES, SATELLITE OBSERVATION, SIBERIA,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, MESOSCALE PHENOMENA, ATMOSPHERIC GENERAL...
Previous studies of emission factors from biomass burning are prone to large errors since they ignore the interplay of mixing and varying pre-fire background CO2 levels. Such complications severely affected our studies of 446 forest fire plume samples measured in the Western US by the science teams of NASA's SEAC4RS and ARCTAS airborne missions. Consequently we propose a Mixed Effects Regression Emission Technique (MERET) to check techniques like the Normalized Emission Ratio Method (NERM),...
Topics: NASA Technical Reports Server (NTRS), FOREST FIRES, BIOMASS BURNING, PLUMES, CARBON DIOXIDE,...
This research uses the critical reflectance technique, a space-based remote sensing method, to measure the spatial distribution of aerosol absorption properties over land. Choosing two regions dominated by biomass burning aerosols, a series of sensitivity studies were undertaken to analyze the potential limitations of this method for the type of aerosol to be encountered in the selected study areas, and to show that the retrieved results are relatively insensitive to uncertainties in the...
Topics: NASA Technical Reports Server (NTRS), BIOMASS BURNING, AEROSOLS, SPATIAL DISTRIBUTION, ABSORPTION...
Satellite remote sensing is providing us tremendous opportunities to measure the fire radiative energy (FRE) release rate or power (FRP) from open biomass burning, which affects many vegetated regions of the world on a seasonal basis. Knowledge of the biomass burning characteristics and emission source strengths of different (particulate and gaseous) smoke constituents is one of the principal ingredients upon which the assessment, modeling, and forecasting of their distribution and impacts...
Topics: NASA Technical Reports Server (NTRS), FIRES, IMAGING SPECTROMETERS, MODIS (RADIOMETRY), SATELLITE...
Fires in South America cause forest degradation and contribute to carbon emissions associated with land use change. Here we investigated the relationship between year-to-year changes in satellite-derived estimates of fire activity in South America and sea surface temperature (SST) anomalies. We found that the Oceanic Ni o Index (ONI) was correlated with interannual fire activity in the eastern Amazon whereas the Atlantic Multidecadal Oscillation (AMO) index was more closely linked with fires in...
Topics: NASA Technical Reports Server (NTRS), FOREST FIRES, SEA SURFACE TEMPERATURE, TELECONNECTIONS...
The goal of this REASoN applications and technology project is to deliver and use Earth Science Enterprise (ESE) data and tools in support of air quality management. Its scope falls within the domain of air quality management and aims to develop a federated air quality information sharing network that includes data from NASA, EPA, US States and others. Project goals were achieved through a access of satellite and ground observation data, web services information technology, interoperability...
Topics: NASA Technical Reports Server (NTRS), AIR QUALITY, DATA PROCESSING, EARTH SCIENCES, MODIS...
The modelers point of view is that the aerosol problem is one of sources, evolution, and sinks. Relative to evolution and sink processes, enormous attention is given to the problem of aerosols sources, whether inventory based (e.g., fossil fuel emissions) or dynamic (e.g., dust, sea salt, biomass burning). On the other hand, aerosol losses in models are a major factor in controlling the aerosol distribution and lifetime. Here we shine some light on how aerosol sinks are treated in modern...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, ATMOSPHERIC MODELS, PARAMETERIZATION, SINKS, DUST,...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, ASIA, ATMOSPHERIC COMPOSITION, PARTICULATES,...
The new generation of satellite sensors such as the Moderate Resolution Imaging Spectroradiometer (MODIS) will be able to detect and characterize global aerosols with an unprecedented accuracy. The question remains whether this accuracy will be sufficient to narrow the uncertainties in our estimates of aerosol radiative forcing at the top of the atmosphere. Satellite remote sensing detects aerosol optical thickness with the least amount of relative error when aerosol loading is high. Satellites...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, ATMOSPHERIC MODELS, SMOKE, SPATIAL DISTRIBUTION,...
Ozone profiles are derived from backscattered radiances in the ultraviolet spectra (290-340 nm) measured by the nadir-viewing Global Ozone Monitoring Experiment using optimal estimation. Tropospheric O3 is directly retrieved with the tropopause as one of the retrieval levels. To optimize the retrieval and improve the fitting precision needed for tropospheric O3, we perform extensive wavelength and radiometric calibrations and improve forward model inputs. Retrieved O3 profiles and tropospheric...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC COMPOSITION, OZONE, TROPOSPHERE, ALGORITHMS,...
As part of the TRACE-P mission, ozone vertical profile measurements were made at a number of locations in the North Pacific. At most of the sites there is also a multi-year record of ozonesonde observations. From seven locations in the western Pacific (Hong Kong; Taipei; Jeju Island, Korea; and Naha, Kagoshima, Tsukuba, and Sapporo, Japan), a site in the central Pacific (Hilo, HI), and a site on the west coast of the U.S. (Trinidad Head, CA) both a seasonal and event specific picture of...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC SOUNDING, OZONOMETRY, TROPOSPHERE, PACIFIC OCEAN,...
Tropospheric column ozone (TCO) is derived from differential measurements of total column ozone from Nimus-7 and Earth Probe TOMS, and stratospheric column ozone from the Microwave Limb Sounder instrument on the Upper Atmospheric Research Satellite. It is shown that TCO during summer months over the Atlantic and Pacific Oceans at northern mid-latitudes is about the same (50-60 Dobson Units) as over the continents of North America, Europe and Asia, where surface emissions of nitrogen oxides from...
Topics: NASA Technical Reports Server (NTRS), OZONE, UPPER ATMOSPHERE, TROPOSPHERE, ATMOSPHERIC...
Hydrogen cyanide is not usually considered in atmospheric chemical models. The paper presents three reasons why hydrogen cyanide is likely to be significant for atmospheric chemistry. Firstly, HCN is a product and marker of biomass burning. Secondly, it is also likely that lightning is producing HCN, and as HCN is sparingly soluble it could be a useful long-lived "smoking gun" marker of lightning activity. Thirdly, the chemical decomposition of HCN leads to the production of small...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC CHEMISTRY, CYANIDES, HYDROGEN, HYDROCYANIC ACID,...
The northern sub-Saharan African (NSSA) region, bounded by the Sahara, Equator, and the West and East African coastlines, is subjected to intense biomass burning every year during the dry season. This is believed to be one of the drivers of the regional carbon and energy cycles, with serious implications for the water cycle anomalies that probably contribute to drought and desertification. In this presentation, we will discuss a new multi-disciplinary research in the NSSA region, review...
Topics: NASA Technical Reports Server (NTRS), AFRICA, BIOMASS BURNING, DROUGHT, GRASSLANDS, CLIMATE CHANGE,...
High altitude smoke-plumes from large, explosive fires were discovered in the late 1990sThey can now be observed with unprecedented detail from space-borne instruments with high vertical resolution in the UTLS such as CALIOP, MLS and ACE. These events inject large quantities of pollutants into a relatively clean and dry environment They serve as unique natural experiments with which to understand, using chemical transport and composition-climate models, the chemical and radiative impacts of...
Topics: NASA Technical Reports Server (NTRS), HIGH ALTITUDE, FIRES, SATELLITE-BORNE INSTRUMENTS, HIGH...
Smoke aerosols from biomass burning are an important component of the global aerosol cycle. Analysis of Aerosol Robotic Network (AERONET) retrievals of size distribution and refractive index reveals variety between biomass burning aerosols in different global source regions, in terms of aerosol particle size and single scatter albedo (SSA). Case studies of smoke transported to coastal/island AERONET sites also mostly lie within the range of variability at near-source sites. Two broad families...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, ALGORITHMS, ATMOSPHERIC MODELS, BIOMASS BURNING,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, EXTINCTION, CHARACTERIZATION, OPTICAL THICKNESS,...
This report provides a compendium of NASA aircraft data that are available from NASA's Global Tropospheric Experiment's (GTE) Pacific Exploratory Mission-Tropics B (PEM-Tropics B) conducted in March and April 1999. PEM-Tropics B was conducted during the southern-tropical wet season when the influence from biomass burning observed in PEM-Tropics A was minimal. Major deployment sites were Hawaii, Kiritimati (Christmas Island), Tahiti, Fiji, and Easter Island. The broad goals of PEM-Tropics B were...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, OXIDATION, TROPOSPHERE, CHEMICAL COMPOSITION, DATA...
Airmass type characterization is key in understanding the relative contribution of various emission sources to atmospheric composition and air quality and can be useful in bottom-up model validation and emission inventories. However, classification of pollution plumes from space is often not trivial. Sub-orbital campaigns, such as SEAC4RS (Studies of Emissions, Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys) give us a unique opportunity to study atmospheric composition...
Topics: NASA Technical Reports Server (NTRS), AIR POLLUTION, AIR MASSES, FOREST FIRES, BIOMASS BURNING,...
Savannas consist of a continuous layer of grass interspersed with scattered trees or shrubs, and cover approx. 10 million square kilometers of tropical Africa. African savanna fires, almost all resulting from human activities, may produce as much as a third of the total global emissions from biomass burning. Little is known, however, about the frequency and location of these fires, and the area burned each year. Emissions from African savanna burning are known to be transported over the...
Topics: NASA Technical Reports Server (NTRS), BIOMASS BURNING, GRASSLANDS, AFRICA, SATELLITE IMAGERY,...
The NASA Goddard Earth Observing System modeling and data assimilation environment (GEOS-5) is maintained by the Global Modeling and Assimilation Office (GMAO) at the NASA Goddard Space Flight Center. Near-realtime meteorological forecasts are produced to support NASA satellite and field missions. We have implemented in this environment an aerosol module based on the Goddard Chemistry, Aerosol, Radiation, and Transport (GOCART) model. This modeling system has previously been evaluated in the...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, EARTH OBSERVING SYSTEM (EOS), REAL TIME OPERATION,...
Ground, airborne and spaceborne data were collected for a 450 ha prescribed fire implemented on 18 October 2011 at the Henry W. Coe State Park in California. The integration of various data elements allowed near coincident active fire retrievals to be estimated. The Autonomous Modular Sensor-Wildfire (AMS) airborne multispectral imaging system was used as a bridge between ground and spaceborne data sets providing high quality reference information to support satellite fire retrieval error...
Topics: NASA Technical Reports Server (NTRS), AIRBORNE EQUIPMENT, BIOMASS BURNING, SPACECRAFT INSTRUMENTS,...
Black carbon aerosol plays a unique and important role in Earth's climate system. Black carbon is a type of carbonaceous material with a unique combination of physical properties. This assessment provides an evaluation of black-carbon climate forcing that is comprehensive in its inclusion of all known and relevant processes and that is quantitative in providing best estimates and uncertainties of the main forcing terms: direct solar absorption; influence on liquid, mixed phase, and ice clouds;...
Topics: NASA Technical Reports Server (NTRS), CLIMATE MODELS, ATMOSPHERIC CHEMISTRY, BIOMASS BURNING,...
Measurements of tropospheric ozone from combined Aura OMI and MLS instruments have yielded a large number of new and important science discoveries over the last decade. These discoveries have generated a much greater understanding of biomass burning, lightning NO, and stratosphere-troposphere exchange sources of tropospheric ozone, ENSO dynamics and photochemistry, intra-seasonal variability-Madden-Julian Oscillation including convective transport, radiative forcing, measuring ozone pollution...
Topics: NASA Technical Reports Server (NTRS), TROPOSPHERE, OZONE, AURA SPACECRAFT, MADDEN-JULIAN...
The Fire Energetics and Emissions Research (FEER) group's new coefficient of emission global gridded product at 1x1 resolution that directly relates fire readiative energy (FRE) to smoke aerosol release, FEERv1.0 Ce, made its public debut in August 2013. Since then, steps have been taken to generate corresponding maps and totals of total particulate matter (PM) emissions using different sources of FRE, and subsequently to simulate the resulting PM(sub 2.5) in the WRF-Chem 3.5 model using...
Topics: NASA Technical Reports Server (NTRS), FIRES, BIOMASS BURNING, AEROSOLS, ALGORITHMS, PARTICULATES,...
Atmospheric particles including mineral dust, biomass burning smoke, pollution from carbonaceous aerosols and sulfates, sea salt, impact air quality and climate. The Aerosol Robotic Network (AERONET) program, established in the early 1990s, is a federation of ground-based remote sensing aerosol networks of Sun/sky radiometers distributed around the world, which provides a long-term, continuous and readily accessible public domain database of aerosol optical (e.g., aerosol optical depth) and...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, REMOTE SENSING, ROBOTICS, CLIMATOLOGY, EARTH...
The multi-angle implementation of atmospheric correction (MAIAC) algorithm makes aerosol retrievals from MODIS data at 1 km resolution providing information about the fine scale aerosol variability. This information is required in different applications such as urban air quality analysis, aerosol source identification etc. The quality of high resolution aerosol data is directly linked to the quality of cloud mask, in particular detection of small (sub-pixel) and low clouds. This work continues...
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, BIOMASS BURNING, SMOKE, CLOUDS (METEOROLOGY),...
We investigated the anthropogenic and volcanic contributions to sulfate aerosol in the stratosphere through modeling and analysis of satellite data. We use a global model GOCART to simulate SO2 and sulfate aerosol in the period of 2000 to 2010, during which numerous volcanic eruptions occurred although nothing like the magnitudes of El Chichon or Pinatubo. We compared the model results with the column SO2 data from OMI and stratospheric SO2 data from MLS instrument on Aura satellite and the...
Topics: NASA Technical Reports Server (NTRS), MAN ENVIRONMENT INTERACTIONS, VOLCANOES, PERIODIC VARIATIONS,...
We interpret the distribution of tropical tropospheric ozone columns (TTOCs) from the Total Ozone Mapping Spectrometer (TOMS) by using a global three-dimensional model of tropospheric chemistry (GEOS-CHEM) and additional information from in situ observations. The GEOS-CHEM TTOCs capture 44% of the variance of monthly mean TOMS TTOCs from the convective cloud differential method (CCD) with no global bias. Major discrepancies are found over northern Africa and south Asia where the TOMS TTOCs do...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC CHEMISTRY, THREE DIMENSIONAL MODELS, TOTAL OZONE...
This is the final report for "Using satellite observations to quantify biomass burning emissions of NOx and hydrocarbons in the Tropics", funded through the New Investigator Program between March 2001 and March 2005. This period includes a 1-year no-cost extension of the original award. This report summarizes our accomplishments during the duration of the grant. Section 2 focuses on the research component of this work, while section 3 describes the education component. The personnel...
Topics: NASA Technical Reports Server (NTRS), BIOMASS BURNING, HYDROCARBONS, NITROGEN OXIDES, SATELLITE...
3D aerosol-cloud interaction is examined by analyzing two images containing cumulus clouds in biomass burning regions in Brazil. The research consists of two parts. The first part focuses on identifying 3D clo ud impacts on the reflectance of pixel selected for the MODIS aerosol retrieval based purely on observations. The second part of the resea rch combines the observations with radiative transfer computations to identify key parameters in 3D aerosol-cloud interaction. We found that 3D...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, BIOMASS BURNING, CLOUD COVER, CUMULUS CLOUDS,...
We present an investigation on multi-decadal changes of atmospheric aerosols and their effects on surface radiation using a global chemistry transport model GOCART along with the near-term to long-term data records. We focus on a 28-year time period of satellite era from 1980 to 2007 during which a suite of aerosol data from satellite observations, ground-based measurements, and intensive field experiments have become available. Particularly: (1) We compare the model calculated clear sky...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, CLIMATOLOGY, RADIATIVE TRANSFER, TERRESTRIAL...
