A5037040537- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Climate variability and models
- Calibration and Measurement Techniques
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Infrared Target Detection Methodologies
- Spectroscopy and Laser Applications
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Urban Heat Island Mitigation
- Solar Radiation and Photovoltaics
- Radiative Heat Transfer Studies
- Geological Studies and Exploration
- Geophysics and Gravity Measurements
- Space Exploration and Technology
- Spacecraft Design and Technology
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Solar Thermal and Photovoltaic Systems
- Climate Change Policy and Economics
- Ionosphere and magnetosphere dynamics
University of Michigan
2016-2025
University of Wisconsin–Milwaukee
2022
Hong Kong University of Science and Technology
2022
University of Hong Kong
2022
Lawrence Livermore National Laboratory
2022
Langley Research Center
2018-2020
Science Systems and Applications (United States)
2020
Universities Space Research Association
2020
Michigan United
2008-2019
Lawrence Berkeley National Laboratory
2018
Abstract The algorithm to produce the Clouds and Earth’s Radiant Energy System (CERES) Edition 4.0 (Ed4) Balanced Filled (EBAF)-surface data product is explained. forces computed top-of-atmosphere (TOA) irradiances match with Ed4 EBAF-TOA by adjusting surface, cloud, atmospheric properties. Surface are subsequently adjusted using radiative kernels. adjustment process composed of two parts: bias correction Lagrange multiplier. in temperature specific humidity between 200 500 hPa used for...
The Climate Absolute Radiance and Refractivity Observatory (CLARREO) mission will provide a calibration laboratory in orbit for the purpose of accurately measuring attributing climate change. CLARREO measurements establish new change benchmarks with high absolute radiometric accuracy statistical confidence across wide range essential variables. CLARREO's inherently be verified traceable on to Système Internationale (SI) units. established by critical assessing changes Earth system model...
Abstract This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SMv2 is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid‐latitudes 30 at equator poles. The...
Climate models predict that the concentration of water vapor in upper troposphere could double by end century as a result increases greenhouse gases. Such moistening plays key role amplifying rate at which climate warms response to anthropogenic activities, but has been difficult detect because deficiencies conventional observing systems. We use satellite measurements highlight distinct radiative signature tropospheric over period 1982 2004. The observed is accurately captured model...
This paper highlights how the emerging record of satellite observations from Earth Observation System (EOS) and A-Train constellation are advancing our ability to more completely document understand underlying processes associated with variations in Earth's top-of-atmosphere (TOA) radiation budget. Large-scale TOA changes during past decade observed be within 0.5 Wm−2 per based upon comparisons between Clouds Radiant Energy (CERES) instruments aboard Terra Aqua other instruments. Tropical...
Abstract The outgoing longwave radiation (OLR) emitted to space is a fundamental component of the Earth’s energy budget. There are numerous, entangled physical processes that contribute OLR and responsible for driving, responding to, climate change. Spectrally resolved observations can disentangle these processes, but technical limitations have precluded accurate space-based spectral measurements covering far infrared (FIR) from 100 667 cm −1 (wavelengths between 15 µ m). FIR spectrum thus...
Abstract While current atmospheric general circulation models (GCMs) still treat the surface as a blackbody in their longwave radiation scheme, recent studies suggest need for taking realistic spectral emissivity into account. There have been few measurements available far IR (<650 cm−1). Based on first-principle calculation, authors compute over entire spectrum variety of types. MODIS-retrieved mid-IR at 0.05° × spatial resolution is then regressed against calculated to determine...
Abstract. The Snow, Ice, and Aerosol Radiative (SNICAR) model has been used in various capacities over the last 15 years to spectral albedo of snow with light-absorbing constituents (LACs). Recent studies have extended include an adding-doubling two-stream solver representations non-spherical ice particles; carbon dioxide snow; algae; new types mineral dust, volcanic ash, brown carbon. New options also exist for refractive indices solar-zenith-angle-dependent surface irradiances derive...
This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SM 2 (E3SMv2) is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid-latitudes 30 at equator poles. The...
Presently, there are no global measurement constraints on the surface emissivity at wavelengths longer than 15 μm, even though this property in far-IR region has a direct impact outgoing longwave radiation (OLR) and infrared cooling rates where column precipitable water vapor (PWV) is less 1 mm. Such dry conditions common for high-altitude high-latitude locations, with potential modeled climate to be impacted by uncertain characteristics. This paper explores sensitivity of instantaneous OLR...
Abstract Earth’s climate is strongly influenced by energy deficits at the poles that emit more thermal than they receive from sun. Energy exchanges between surface and atmosphere influence local environment while heat transport lower latitudes drives midlatitude atmospheric oceanic circulations. In Arctic, in particular, imbalances induce strong seasonality surface–atmosphere an acute sensitivity to forced variations. Despite these important global influences, largest contributions polar...
This work documents version two of the Department Energy’s Energy Exascale Earth System Model (E3SM). E3SM 2 (E3SMv2) is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid-latitudes 30 at equator poles. The...
Abstract Observations of the scale dependence height-resolved temperature T and water vapor q variability are valuable for improved subgrid-scale climate model parameterizations evaluation. Variance spectral benchmarks obtained from Atmospheric Infrared Sounder (AIRS) compared to those generated by state-of-the-art numerical weather prediction “analyses” “free-running” simulations with spatial resolution comparable AIRS. The spectra both types models generally too steep, small-scale variance...
While most general circulation models assume spectrally independent surface emissivity and nonscattering clouds in their longwave radiation treatment, spectral variation of the index refraction ice indicates that far IR, snow can vary considerably cause nonnegligible scattering. These effects are more important for high-elevation polar continents where dry cold atmosphere is not opaque IR. We carry out sensitivity studies to show a winter month over Antarctic Plateau including cloud...
Surface longwave emissivity can be less than unity and vary significantly with frequency. However, most climate models still assume a blackbody surface in the (LW) radiation scheme of their atmosphere models. This study incorporates realistic spectral into atmospheric component Community Earth System Model (CESM), version 1.1.1, evaluates its impact on simulated climate. By ensuring consistency broadband flux across different components CESM, top-of-the-atmosphere (TOA) energy balance...
Objective: To evaluate the use of infrared thermography technology for objective and quantitative syndrome differentiation treatment in traditional Chinese medicine (TCM), specifically patients with Chaihu Guizhi Ganjiang Decoction syndrome. Methods: Data were collected from over 100 diagnosed at Professor Li Leyu’s endocrinology clinic, Zhongshan Hospital Traditional Medicine, Guangdong Province, between April 2021 2022. Body surface temperature data obtained using MTI-EXPRO-2013-B system....
The spectrally resolved infrared radiances observed by AIRS provide a strict and insightful test for general circulation models (GCMs). We compare the clear‐ total‐ sky spectra simulated from Geophysical Fluid Dynamics Laboratory GCM using high resolution radiation code with observations. After ensuring consistency in sampling of proper representation clouds radiance simulation, global‐mean are shown to agree within 2 K window region. Radiance discrepancies water vapor v (1300–1650 cm −1 )...
Abstract The authors present a new method to derive both the broadband and spectral longwave observation-based cloud radiative kernels (CRKs) using forcing (CRF) fraction (CF) for different types multisensor A-Train observations MERRA data collocated on pixel scale. Both CRKs model-based derived from Fu–Liou transfer model are shown. Good agreement between observation- model-derived is found optically thick clouds. For thin clouds, show larger sensitivity at TOA cloud-cover change than CRKs....
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...
[1] CloudSat observed tropical liquid and ice water content (L/IWC, Version 4) profiles are compared with GEOS5 analyses, NCAR-CAM3, GFDL-AM2 simulations. Both the analyses free-running general circulation models (GCMs) underestimate IWC in upper troposphere, simulated paths (IWPs) being 22% (GEOS5), 9% (CAM3), 54% (AM2) of CloudSat retrieval. For clouds, produces closest match to CloudSat, a distinct peak LWC around 1.5–2 km. CAM3 AM2 generate clouds broad vertical layer lower middle...
Abstract. One-dimensional variational retrievals of temperature and moisture fields from hyperspectral infrared (IR) satellite sounders use cloud-cleared radiances (CCRs) as their observation. These derived observations allow the clear-sky-only radiative transfer in inversion for geophysical variables but at reduced spatial resolution compared to native sounder observations. Cloud clearing can introduce various errors, although scenes with large errors be identified ignored. Information...