A5031192198- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Chinese history and philosophy
- Air Quality Monitoring and Forecasting
- Calibration and Measurement Techniques
- China's Ethnic Minorities and Relations
- Remote Sensing in Agriculture
- Vietnamese History and Culture Studies
- Marine and coastal ecosystems
- Planetary Science and Exploration
- Japanese History and Culture
- Air Quality and Health Impacts
- Climate variability and models
- Spacecraft Design and Technology
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Space exploration and regulation
- Environmental and Agricultural Sciences
- Spaceflight effects on biology
- Infrared Target Detection Methodologies
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Hong Kong and Taiwan Politics
University of Maryland, Baltimore County
2018-2025
Fudan University
2024
University of Iowa
2016-2022
University of Maryland, Baltimore
2021
Systems Technology (United States)
2019
University of Maryland, College Park
2019
University of Colorado Boulder
2019
University of Nebraska–Lincoln
2010-2017
Chinese Academy of Meteorological Sciences
2016
University of Chinese Academy of Sciences
2012
Abstract The increasing severity of droughts/floods and worsening air quality from aerosols in Asia monsoon regions are the two gravest threats facing over 60% world population living Asian regions. These dual have fueled a large body research last decade on roles impacting weather climate. This paper provides comprehensive review studies aerosols, monsoons, their interactions. region is primary source emissions diverse species both anthropogenic natural origins. distributions aerosol...
Predicting the influences of dust on atmospheric composition, climate, and human health requires accurate knowledge emissions, but large uncertainties persist in quantifying mineral sources. This study presents a new method for combined use satellite‐measured radiances inverse modeling to spatially constrain amount location emissions. The technique is illustrated with case May 2008; emissions Taklimakan Gobi deserts are optimized using GEOS‐Chem chemical transport model its adjoint...
We present a new top‐down approach that spatially constrains the amount of aerosol emissions using satellite (Moderate Resolution Imaging Spectroradiometer (MODIS)) observed radiances with adjoint chemistry transport model (GEOS‐Chem). This paper aims to demonstrate through applying it case study yields following emission estimates over China for April 2008: 1.73 Tg SO 2 , 0.72 NH 3 1.38 NO x 0.10 black carbon, and 0.18 organic carbon from anthropogenic sources, which reflects, respectively,...
We presented an algorithm for inferring aerosol layer height (ALH) and optical depth (AOD) over ocean surface from radiances in oxygen A B bands measured by the Earth Polychromatic Imaging Camera (EPIC) on Deep Space Climate Observatory orbiting at Lagrangian-1 point. The was applied to EPIC imagery of a two-day dust outbreak North Atlantic Ocean. Retrieved ALHs AODs were evaluated against counterparts observed Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), Moderate Resolution...
Abstract We develop an approach combining mass balance and four‐dimensional variational (4D‐Var) methods to facilitate inversion of decadal‐scale total nitrogen oxides (NO x = NO + 2 ) emissions. In 7 year pseudo‐observation tests, hybrid posterior emissions have smaller normalized mean square error (NMSE) than that when compared true in most cases perform slightly better detecting emission magnitudes trends. Using this method, OMI satellite observations the GEOS‐Chem chemical transport...
To quantitatively estimate the divergences in natural and anthropogenic dust emission fluxes among different climatic regions, total emissions at global scale from 2007 to 2010 were simulated this study. Despite widely scattered distribution, area of potential sources was found slightly higher than that sources. The distribution 1.61 × 107 km2 January 1.54 July, respectively. contributed 81.0% 19.0% residual. flux 6.34 ± 0.31 μg m−2 s−1 1.01 0.07 s−1, Especially, situated regions. Natural...
Constraint of the vertical distribution aerosol particles is crucial for study plume structure, radiative effects, and ultimately monitoring surface air pollution. We developed an algorithm to retrieve optical central height (AOCH) absorbing aerosols by using, first time, oxygen (O2) A B absorption band measurements from TROPOspheric Monitoring Instrument (TROPOMI) over dark targets. For retrieval, narrow radiance at seven channels ranging ultraviolet (UV) shortwave infrared (SWIR) are...
Abstract This paper is the first part of a two‐part study that aims to retrieve aerosol particle size distribution (PSD) and refractive index from multispectral multiangular polarimetric measurements taken by new‐generation Sun photometer as Aerosol Robotic Network (AERONET). It provides theoretical analysis guidance companion in which we have developed an inversion algorithm for retrieving 22 microphysical parameters associated with bimodal PSD function real AERONET measurements. Our starts...
Abstract A new research algorithm is presented here as the second part of a two‐part study to retrieve aerosol microphysical properties from multispectral and multiangular photopolarimetric measurements taken by Aerosol Robotic Network's (AERONET's) new‐generation Sun photometer. The uses an advanced UNified Linearized Vector Radiative Transfer Model incorporates statistical optimization approach. While has heritage AERONET operational inversion in constraining priori retrieval smoothness,...
Abstract. Theoretical analysis is conducted to reveal the information content of aerosol vertical profile in space-borne measurements backscattered radiance and degree linear polarization (DOLP) oxygen (O2) A B bands. Assuming a quasi-Gaussian shape for characterized by peak height H half width γ (at maximum), Unified Linearized Vector Radiative Transfer Model (UNL-VRTM) used simulate Stokes four-vector elements upwelling radiation at top atmosphere (TOA) their Jacobians with respect γ....
NASA's Plankton, Aerosol, Clouds, ocean Ecosystem (PACE) satellite mission is scheduled to launch in 2022, with the Ocean Color Instrument (OCI) on board. For first time reflected sunlight from Earth across a broad spectrum ultraviolet (UV: 350 nm) short wave infrared (SWIR: 2260 will be measured single instrument at 1 km spatial resolution. While seven discrete bands represent SWIR, nm 890 continuously covered spectral resolution of 5 nm. OCI thus combine (and an enhanced for UV) heritage...
Abstract. NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in the timeframe of 2023, will carry a hyperspectral scanning radiometer named Ocean Color Instrument (OCI) and two multi-angle polarimeters (MAPs): UMBC Hyper-Angular Rainbow Polarimeter (HARP2) SRON Spectro-Polarimeter Planetary EXploration one (SPEXone). The MAP measurements contain rich information on microphysical properties aerosols hydrosols therefore can be used to retrieve accurate...
Abstract The monthly and hourly climatology of Saharan dust layer height over the Atlantic, at a spatial resolution ∼10 km, is obtained for first time, via passive remote sensing technique. technique applied to multiple years Earth Polychromatic Imaging Camera (EPIC) data collected Lagrange‐1 point, generating climate record (CDR) aerosol optical centroid (AOCH). This CDR offers unprecedented coverage diurnal sampling compared spaceborne lidars (CALIOP CATS). Our results show high...
Abstract The abundant dust particles from widespread deserts in East Asia play a significant role regional climate and air quality. In this study, we provide comprehensive evaluation of the widely used Moderate Resolution Imaging Spectroradiometer (MODIS) Deep Blue (DB) aerosol retrievals desert regions using ground‐based observations over eight sites China Aerosol Remote Sensing Network (CARSNET). Different their well‐characterized performance urban cropland areas around globe, DB optical...
Abstract. We present an algorithm for retrieving aerosol layer height (ALH) and optical depth (AOD) smoke over vegetated land water surfaces from measurements of the Earth Polychromatic Imaging Camera (EPIC) onboard Deep Space Climate Observatory (DSCOVR). The uses Earth-reflected radiances in six EPIC bands visible near-infrared incorporates flexible spectral fitting that accounts specifics surface reflectivity. procedure first determines AOD using atmospheric window (443, 551, 680, 780...
Abstract. Multi-angle polarimetric (MAP) imaging of Earth scenes can be used for the retrieval microphysical and optical parameters aerosols clouds. The Airborne Hyper-Angular Rainbow Polarimeter (AirHARP) is an aircraft MAP instrument with a hyper-angular capability 60 along-track viewing angles at 670 nm 20 other wavelengths – 440, 550, 870 across full 114∘ (94∘) (cross-track) field view. Here we report aerosol properties using Generalized Retrieval Aerosols Surface Properties (GRASP)...
Abstract. SO2 and NO2 observations from the Ozone Mapping Profiler Suite (OMPS) sensor are used for first time in conjunction with GEOS-Chem adjoint model to optimize both NOx emission estimates over China October 2013. Separate joint (simultaneous) optimizations of emissions conducted compared. Posterior emissions, compared prior, yield improvements simulating columnar NO2, comparison measurements Monitoring Instrument (OMI) OMPS. The posterior separate inversions 748 Gg S 672 N, which 36 %...