A5027503115- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Spectroscopy and Laser Applications
- Calibration and Measurement Techniques
- Air Quality Monitoring and Forecasting
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Geochemistry and Geologic Mapping
- Remote Sensing in Agriculture
- Water Quality Monitoring and Analysis
- Radiative Heat Transfer Studies
- Spacecraft and Cryogenic Technologies
- Hydrocarbon exploration and reservoir analysis
- Urban Heat Island Mitigation
- Marine and coastal ecosystems
- Geophysics and Gravity Measurements
- Isotope Analysis in Ecology
- Advanced Computational Techniques and Applications
- Infrared Target Detection Methodologies
Jet Propulsion Laboratory
2015-2024
California Institute of Technology
2010-2024
Nanjing University of Information Science and Technology
2020
Chinese Academy of Meteorological Sciences
2020
Abstract. This work describes the NASA Atmospheric CO2 Observations from Space (ACOS) XCO2 retrieval algorithm, and its performance on highly realistic, simulated observations. These tests, restricted to observations over land, are used evaluate errors in face of realistic clouds aerosols, polarized non-Lambertian surfaces, imperfect meteorology, uncorrelated instrument noise. We find that post-retrieval filters essential eliminate poorest retrievals, which arise primarily due cloud...
Abstract. Since September 2014, NASA's Orbiting Carbon Observatory-2 (OCO-2) satellite has been taking measurements of reflected solar spectra and using them to infer atmospheric carbon dioxide levels. This work provides details the OCO-2 retrieval algorithm, versions 7 8, used derive column-averaged dry air mole fraction CO2 (XCO2) for roughly 100 000 cloud-free recorded by each day. The algorithm is based on Atmospheric Observations from Space (ACOS) which applied observations Greenhouse...
Abstract. Here, we report preliminary estimates of the column averaged carbon dioxide (CO2) dry air mole fraction, XCO2, retrieved from spectra recorded over land by Greenhouse gases Observing Satellite, GOSAT (nicknamed "Ibuki"), using retrieval methods originally developed for NASA Orbiting Carbon Observatory (OCO) mission. After screening clouds and other known error sources, these retrievals reproduce much expected structure in global XCO2 field, including its variation with latitude...
Abstract. The Orbiting Carbon Observatory-2 (OCO-2) is the first National Aeronautics and Space Administration (NASA) satellite designed to measure atmospheric carbon dioxide (CO2) with accuracy, resolution, coverage needed quantify CO2 fluxes (sources sinks) on regional scales. OCO-2 was successfully launched 2 July 2014 has gathered more than years of observations. v7/v7r operational data products from September January 2016 are discussed here. On monthly timescales, 7 12 % these...
Space‐based measurements of reflected sunlight in the near‐infrared (NIR) region promise to yield accurate and precise observations global distribution atmospheric CO 2 . The Orbiting Carbon Observatory (OCO) is a future NASA mission, which will use this technique measure column‐averaged dry air mole fraction with precision accuracy needed quantify sources sinks on regional scales (∼1000 × 1000 km ) characterize their variability seasonal timescales. Here, we have used OCO retrieval...
The Geostationary Coastal and Air Pollution Events (GEO-CAPE) mission was recommended by the National Research Council's (NRC's) Earth Science Decadal Survey to measure tropospheric trace gases aerosols coastal ocean phytoplankton, water quality, biogeochemistry from geostationary orbit, providing continuous observations within field of view. To fulfill mandate address challenge put forth NRC, two GEO-CAPE Working Groups (SWGs), representing atmospheric composition color disciplines, have...
It has been shown that spectroscopy of transiting extrasolar planets can potentially provide a wealth information about their atmospheres. Herein, we set up the inverse problem in spectroscopic retrieval. We use nonlinear optimal estimation to retrieve atmospheric state (pioneered for Earth sounding by Rodgers). The formulation quantifies degrees freedom and content spectrum with respect geophysical parameters; herein, focus specifically on temperature composition. First, apply technique...
Abstract. We present satellite based ozone profile estimates derived by combining radiances measured at thermal infrared (TIR) wavelengths from the Aura Tropospheric Emission Spectrometer (TES) and ultraviolet (UV) Ozone Monitoring Instrument (OMI). The advantage of using these combined instruments for sounding over either instrument alone is improved sensitivity near surface as well capability to consistently resolve lower troposphere, upper stratosphere scenes with varying geophysical...
Abstract. The Measurements of Pollution in the Troposphere (MOPITT) instrument is only satellite-borne sensor operation that uses both thermal (TIR) and near-infrared (NIR) channels to estimate CO profiles. With more than 15 years (2000 present) validated multispectral observations, MOPITT provides unique capability separate lowermost troposphere (LMT, surface 3 km (∼ 700 hPa)) from free-tropospheric abundance. To extend this record, a new, hyper-spectral approach presented here will provide...
Accurate values for the intensity and polarization of light reflected transmitted by optically thick Rayleigh scattering atmospheres with a Lambert surface underneath are presented. A recently reported new method solving integral equations describing Chandrasekhar's X- Y-functions is used. The results have been validated using various tests techniques, including doubling–adding method, accurate to within one unit in eighth decimal place. Tables stored electronically expected be useful as...
Abstract Data from hyperspectral infrared sounders are routinely ingested worldwide by the National Weather Centers. The cloud‐free fraction of this data is used for initializing forecasts which include temperature, water vapor, cloud, and ice cloud profiles on a global grid. Although these sensitive to vertical distribution liquid in clouds, information not fully utilized. In future, could be validating clouds Center models forecasts. We evaluate how well calculated radiances Radiative...
Abstract This study attempts to infer aerosol vertical structure in the urban boundary layer using passive hyperspectral measurements. A spectral sorting technique is developed retrieve total optical depth (AOD) and effective height (ALH) from measurements 1.27‐μm oxygen absorption band by mountaintop Fourier Transform Spectrometer at California Laboratory for Atmospheric Remote Sensing instrument (1,673 m above sea level) overlooking LA basin. Comparison AOD Aerosol Robotic Network...
Resolving spatially-varying exoplanet features from single-point light curves is essential for determining whether Earth-like worlds harbor geological and/or climate systems that influence habitability. To evaluate the feasibility and requirements of this spatial feature resolving problem, we present an analysis multi-wavelength Earth, where it plays role a proxy exoplanet. Here, ~10,000 DSCOVR/EPIC frames collected over two-year period were integrated Earth's disk to yield...