A5037276834- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Aeolian processes and effects
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Icing and De-icing Technologies
- Cryospheric studies and observations
- Fire effects on ecosystems
- Tropical and Extratropical Cyclones Research
- Wind and Air Flow Studies
- Spectroscopy and Laser Applications
- Remote Sensing in Agriculture
- Precipitation Measurement and Analysis
- Advanced Aircraft Design and Technologies
- Remote Sensing and LiDAR Applications
- Advanced Optical Sensing Technologies
- Air Quality and Health Impacts
- Thermal Radiation and Cooling Technologies
- Plant Water Relations and Carbon Dynamics
- Solar Radiation and Photovoltaics
- Fluid Dynamics and Turbulent Flows
- Arctic and Antarctic ice dynamics
- Nanoporous metals and alloys
Chinese Academy of Sciences
1996-2025
University of Colorado Boulder
2018-2025
Stony Brook University
2024-2025
Yunnan Observatories
2025
Xuzhou University of Technology
2024
Inner Mongolia University
2024
Massachusetts Institute of Technology
2020-2024
State University of New York
2024
Laboratory for Atmospheric and Space Physics
2018-2023
University of Hong Kong
2020-2023
CloudSat is a satellite experiment designed to measure the vertical structure of clouds from space. The expected launch planned for 2004, and once launched, will orbit in formation as part constellation satellites (the A-Train) that includes NASA's Aqua Aura satellites, NASA–CNES lidar (CALIPSO), CNES carrying polarimeter (PARASOL). A unique feature brings this ability fly precise enabling fields view radar be overlapped with CALIPSO footprint other measurements constellation. precision near...
This paper reports on the early mission performance of radar and other major aspects CloudSat mission. The Cloudsat cloud profiling (CPR) has been operating since 2 June 2006 proven to be remarkably stable turn‐on. A number products have developed using these space‐borne data as principal inputs. Combined with A‐Train sensor data, new observations offer unique, global views vertical structure clouds precipitation jointly. Approximately 11% detected over oceans produce that, in all...
The cirrus clouds of the upper troposphere are globally widespread and important regulators radiative balance, hence climate, Earth‐atmosphere system. Despite their wide distribution, however, difficult to study from satellite radiance measurements or scattered ground observing sites because they can occur as part multilayered cloud systems characteristically optically thin. need better characterize global distribution was therefore a major justification for formation flying CloudSat CALIPSO...
Abstract. Data from both laboratory studies and atmospheric measurements are used to develop an empirical parameterization for the immersion freezing activity of natural mineral dust particles. Measurements made with Colorado State University (CSU) continuous flow diffusion chamber (CFDC) when processing aerosols at a nominal 105% relative humidity respect water (RHw) taken as measure nucleation Ice active frozen fractions vs. temperature dusts representative Saharan Asian desert sources...
Mixed-phase clouds represent a three-phase colloidal system consisting of water vapor, ice particles, and coexisting supercooled liquid droplets. are ubiquitous in the troposphere, occurring at all latitudes from polar regions to tropics. Because their widespread nature, mixed-phase processes play critical roles life cycle clouds, precipitation formation, cloud electrification, radiative energy balance on both regional global scales. Yet, spite many decades observations theoretical studies,...
Abstract Results are presented from an intercomparison of single‐column and cloud‐resolving model simulations a cold‐air outbreak mixed‐phase stratocumulus cloud observed during the Atmospheric Radiation Measurement (ARM) programme's Mixed‐Phase Arctic Cloud Experiment. The occurred in well‐mixed boundary layer with cloud‐top temperature − 15 °C. average liquid water path around 160 g m −2 was about two‐thirds adiabatic value far greater than mass ice which when integrated surface to top ....
Abstract The current cloud thermodynamic phase discrimination by Cloud-Aerosol Lidar Pathfinder Satellite Observations (CALIPSO) is based on the depolarization of backscattered light measured its lidar [Cloud-Aerosol with Orthogonal Polarization (CALIOP)]. It assumes that from ice crystals depolarizing, whereas water clouds, being spherical, result in minimal depolarization. However, because relationship between CALIOP field view (FOV) and large distance satellite clouds frequent presence...
CloudSat supports a 94 GHz cloud profiling radar as part of the innovative A‐train formation satellites studying Earths clouds and atmosphere. Using vertical profiles precipitation, an algorithm has been developed to determine type present. Because corresponds specific physical properties, this step is needed apply other algorithms derive quantitative content radiative data. This applied initial 1‐year data obtain global distribution various types over land ocean. These results appear...
Based on the first year of CALIPSO lidar measurements under cloud‐free conditions, a height‐resolved global distribution dust aerosols is presented for time. Results indicate that spring most active season, during which ∼20% and ∼12% areas between 0 60°N are influenced by at least 10% 50% time, respectively. In summer within 3–6 km, ∼8.3% area impacted Strong seasonal cycles layer vertical extent observed in major source regions, similar to variation thermally driven boundary depth. The arid...
Accurate observations of cloud microphysical properties are needed for evaluating and improving the representation processes in climate models better estimate Earth radiative budget. However, large differences found current products retrieved from ground‐based remote sensing measurements using various retrieval algorithms. Understanding is an important step to address uncertainties retrievals. In this study, in‐depth analysis nine existing retrievals ARM carried out. We place emphasis on...
Abstract The central Great Plains region in North America has a nocturnal maximum warm-season precipitation. Much of this precipitation comes from organized mesoscale convective systems (MCSs). This is counterintuitive the sense that activity over out phase with local generation CAPE by solar heating surface. lower troposphere environment typically characterized low-level jet (LLJ) just above stable boundary layer (SBL), and available potential energy (CAPE) values peak SBL, resulting...
Cardiac microtissues provide a promising platform for disease modeling and developmental studies, which require the close monitoring of multimodal excitation-contraction dynamics. However, no existing assessing tool can track these dynamics across live tissue. We develop tissue-like mesh bioelectronic system to The has tissue-level softness cell-level dimensions enable stable embedment in It is integrated with an array graphene sensors, uniquely converges both bioelectrical biomechanical...
A cloud detection algorithm based on ground-based remote sensors has been developed that can differentiate among various atmospheric targets such as ice and water clouds, virga, precipitation, aerosol layers. Standard type macrophysical properties are identified by combining polarization lidar, millimeter-wave radar, infrared radiometer, dual-channel microwave radiometer measurements. These algorithms applied to measurements collected during 1998 from the Atmospheric Radiation Measurement...
Using a 2‐year data set of combined lidar and cloud radar measurements from the Cloud‐Aerosol Lidar Infrared Pathfinder Satellite Observations (CALIPSO) CloudSat satellites, occurrence tropical cirrus deep convective clouds is studied. The identification algorithm takes advantage ability to probe precipitating sample even subvisual clouds. Examined are frequency geographical distribution these clouds, their apparent interconnections. There strong diurnal variability in mainly over land, with...
Many of the clouds important to Earth's energy balance, from Tropics Arctic, contain small amounts liquid water. Longwave and shortwave radiative fluxes are very sensitive perturbations cloud water path (LWP), when LWP is (i.e., < 100 g m−2; with less than this threshold will be referred as "thin"). Thus, properties these thin must well understood capture them correctly in climate models. We review importance explain difficulties observing them. In particular, because thin, potentially mixed...
A profiling retrieval algorithm for ice cloud properties, such as effective radius ( r e ), water content (IWC), and an extinction coefficient, has been developed to use combined CloudSat radar reflectivity factor Ze ) CALIPSO attenuated backscattering coefficient measurements based on optimal estimation framework. Developed operational standard data product the project, can treat a wide range of situations from optically tenuous cirrus in upper troposphere geometrically thick anvil clouds....
The first 2 year measurements from Cloud‐Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) lidar CloudSat radar were analyzed to study the distribution phase partition of midlevel liquid‐layer topped stratiform clouds (MLTSC, top higher than 2.5 km above Earth's surface temperature warmer −40°C) globally. global mean MLTSC occurrence was ∼7.8% percentage fraction related all ∼33.6%. Strong seasonal day‐night variations observed over different latitude regions. In polar...
Abstract The change of global-mean precipitation under global warming and interannual variability is predominantly controlled by the atmospheric longwave radiative cooling. Here we show that tightening ascending branch Hadley Circulation coupled with a decrease in tropical high cloud fraction key modulating response to surface warming. magnitude shrinkage primary contributor intermodel spread changes tropical-mean outgoing radiation (OLR) per unit (d P/ d T s ) for both Compared...
Convective clouds produce a significant proportion of the global precipitation and play an important role in energy water cycles. We quantify changes convective cloud ice mass-weighted altitude centroid (ZIWC) as function aerosol optical thickness (AOT). Analyses are conducted smoke, dust polluted continental environments over South America, Central Africa Southeast Asia, using latest measurements from CloudSat CALIPSO satellites. find aerosols can inhibit or invigorate convection, depending...
Abstract In this study several ice cloud retrieval products that utilize active and passive A-Train measurements are evaluated using in situ data collected during the Small Particles Cirrus (SPARTICUS) field campaign. The datasets include water content (IWC), effective radius r e , visible extinction σ from CloudSat level-2C property product (2C-ICE), level-2B radar-visible optical depth (2B-CWC-RVOD), radar–lidar (DARDAR), Cloud–Aerosol Lidar Infrared Pathfinder Satellite Observations (...
A survey of the frequency and characteristics precipitation from low clouds over oceans based on data CloudSat CALIPSO July 2006 through June 2007 is presented. The low‐cloud fraction, drizzle occurrence, estimated cloud base rate are examined globally for eight subtropical midlatitude stratocumulus (Sc) regions. This analysis restricted below 4 km. Drizzle detection characterization further to with tops above 1 km altitude. maximum radar reflectivity within an individual profile (Z max )...
[1] Arctic clouds simulated by the National Center for Atmospheric Research (NCAR) Community Model version 5 (CAM5) are evaluated with observations from U.S. Department of Energy (DOE) Radiation Measurement (ARM) Indirect and Semi-Direct Aerosol Campaign (ISDAC) Mixed-Phase Cloud Experiment (M-PACE), which were conducted at its North Slope Alaska site in April 2008 October 2004, respectively. forecasts spring fall seasons performed under Cloud-Associated Parameterizations Testbed framework...
Clouds are a critical component of the Earth's coupled water and energy cycles. Poor understanding cloud–radiation–dynamics feedbacks results in large uncertainties forecasting human-induced climate changes. Better cloud microphysical dynamical processes is to improving parameterizations models as well cloud-resolving models. Airborne situ remote sensing can make contributions progress. Here, new integrated observation capability developed for University Wyoming King Air described. The suite...
Abstract The initiation of ice in an isolated orographic wave cloud was compared with expectations based on nucleating aerosol concentrations and predictions from new nucleation parameterizations applied a parcel model. Measurements crystal number were found to be good agreement both measured nuclei feeding the clouds determined residual particles collected by counterflow virtual impactor. Using lognormal distributions fitted size chemical compositions, reasonably well predicted 1D model...