A5038714412- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Aeolian processes and effects
- Vehicle emissions and performance
- Meteorological Phenomena and Simulations
- Climate variability and models
- Marine and coastal ecosystems
- Wind and Air Flow Studies
- Urban Heat Island Mitigation
- Tropical and Extratropical Cyclones Research
- Odor and Emission Control Technologies
- COVID-19 impact on air quality
- Remote Sensing in Agriculture
- Impact of Light on Environment and Health
- Environmental Policies and Emissions
- Oil Spill Detection and Mitigation
- Coastal and Marine Dynamics
- Advanced Aircraft Design and Technologies
- Nuclear and radioactivity studies
- Water Quality Monitoring and Analysis
- Ocean Waves and Remote Sensing
Kyushu University
2015-2024
Pacific Northwest National Laboratory
2018
Desert Research Institute
2018
University of Trento
2018
Michigan Technological University
2018
Multidisciplinary Digital Publishing Institute (Switzerland)
2018
Japan Agency for Marine-Earth Science and Technology
2009-2015
National Institute for Environmental Studies
1990-2008
Institute for Global Environmental Strategies
2002-2005
Osaka Prefecture University
2001
Using observations from the Cheeka Peak Observatory in northwestern Washington State during March‐April, 1997, we show that Asian anthropogenic emissions significantly impact concentrations of a large number atmospheric species air arriving to North America spring. Isentropic back‐trajectories can be used identify possible times when this will felt, however trajectories alone are not sufficient indicate presence pollutants. Detailed chemical and meteorological data one these periods (March...
Continuous observations of aerosols in China and Japan were made by polarization lidars during March to May 2001, corresponding with the Asian Pacific Regional Aerosol Characterization Experiment (ACE‐Asia) field campaign period. Lidars Beijing, Nagasaki, Tsukuba continuously operated regardless weather conditions. Scatterers atmosphere categorized for all vertical profiles, occurrence frequencies dust, spherical aerosols, clouds up 6 km calculated. The frequency dust was highest Beijing...
A rapid increase of NO 2 columns over China has been observed by satellite instruments in recent years. We present a 10‐a regional trend x emissions from 1995 to 2004 using bottom‐up methodology and compare the emission trends with column GOME SCIAMACHY, two spaceborne instruments. use dynamic reflect dramatic change China's caused energy growth technology renewal. scenario analysis approach identify possible sources uncertainties current inventory, comparison observation data. Our best...
Although continental-scale plumes of Asian dust and pollution reduce the amount solar radiation reaching earth's surface perturb chemistry atmosphere, our ability to quantify these effects has been limited by a lack critical observations, particularly layers above surface. Comprehensive surface, airborne, shipboard, satellite measurements aerosol chemical composition, size, optical properties, radiative impacts were performed during Pacific Regional Aerosol Characterization Experiment...
Abstract. Using an analysis of the first full year CALIPSO lidar measurements, this paper derives unprecedented, altitude-resolved seasonal distributions desert dust transported over Tibetan Plateau (TP) and surrounding areas. The observations include numerous large plumes northern slope eastern part TP, with largest number events occurring in spring 2007, some layers being lofted to altitudes 11–12 km. Generation airborne dusts appears be largely associated source regions north on plateau....
We coordinated a ground‐based network that has been in use since 1997 to observe Asian dust during springtime. Huge events occurred the middle of April 1998 were captured by this network. In paper we present organization network; description instruments, including lidar, sky radiometer, and optical particle counter; results observation, offer discussions regarding transport mechanism east Asia using an on‐line tracer model. discussed time series surface concentration height distribution...
A yellow sand transport episode from the Asian continent to Japan and North America which occurred in April 1998 is simulated. new on‐line dust tracer model coupled with a regional‐scale meteorological developed applied this storm episode. The results for two large events that started during 14–15 19–20, 1998, have been analyzed discussed. first was trapped cutoff vortex over China plain. modeled 3‐D structure of associated agreed an observed time‐height cross section concentration. Results...
An intercomparison study involving eight dust emission/transport models over Asia (DMIP) has been completed. Participating utilize a variety of emission schemes, horizontal and vertical resolutions, numerical methods, different meteorological models. Two huge episodes occurred in spring 2002 were used for the DMIP study. Meteorological parameters, flux concentration (diameter < 20 μm) are compared within same domain on basis PM NIES lidar measurements. We found that modeled concentrations...
A record heavy Yellow Sand event was observed on 20 March in Beijing. This unusual because the wind speed low and dust concentration extremely high at front. Observations with a polarization lidar, an optical particle counter, high‐volume sampler were performed throughout The visibility derived from lidar data 650 m, total suspended 11 mg/m3 peak. Chemical transport model analysis revealed that main part of originated Mongolian border area near Ejinaqi. severely affected Korea northern...
Data obtained during the TRACE‐P experiment is used to evaluate how well CFORS/STEM‐2K1 regional‐scale chemical transport model able represent aircraft observations. Thirty‐one calculated trace gas and aerosol parameters are presented compared in situ data. The regional shown accurately predict many of important features observed. mean values all lowest 1 km predicted within ±30% observed values. correlation coefficients (R) for meteorological found be higher than those species. For example,...
The Chemical Weather Forecast System (CFORS) is designed to aid in the design of field experiments and interpretation/postanalysis observed data. system integrates a regional chemical transport model with multitracer, online built within Regional Atmospheric Modeling (RAMS) mesoscale model. CFORS was deployed forecast postanalysis modes during NASA Global Tropospheric Experiment (GTE)‐Transport Evolution over Pacific (TRACE‐P), International Chemistry project (IGAC)‐International...
Radiative forcings of aerosols and clouds in the East China Sea region are studied using data from surface radiation measurements, satellite remote sensing, model simulation conducted April 2001 as a study Asian Atmospheric Particle Environmental Change Studies (APEX) cooperating with International Global Chemistry (IGAC)/ACE‐Asia project. The monthly mean whole sky radiative forcing aerosol direct effect is derived various methods −5 to −8 W/m 2 at top atmosphere (TOA) −10 −23 Earth's Gosan...
Dust and anthropogenic aerosol plumes from the Asian continent were observed in Northwest Pacific (32.0° to 38.0°N, 146.5°E) with a two‐wavelength polarization lidar on board research vessel Mirai during MR01‐K02 cruise (May 14 28, 2001). aerosols identified depolarization ratio at 532 nm of backscattering coefficient 1064 nm. High density air masses low small wavelength (indicating particle size) also detected plume. The distribution patterns dust spherical conceptionally explained by model...
A comprehensive regional‐scale chemical transport model, Sulfur Transport and Emissions Model 2001 (STEM‐2K1), is employed to study dust outflows their influence on regional chemistry in the high‐dust Asian Pacific Regional Aerosol Characterization Experiment (ACE‐Asia) period, from 4–14 April 2001. In this storms are initialized Taklamagan Gobi deserts because of cold air outbreaks, transported eastward, often intensified by emitted exposed soils as front moves off continent. Simulated...
Ozone transport and chemistry in the springtime east Asia are studied by use of STEM‐II (Sulfur Transport Eulerian Model) regional‐scale transport/chemistry model. Three‐dimensional simulations performed for period May 1–15, 1987. This was a strong downward ozone Asia, associated with traveling low‐pressure systems. Elevated levels were observed at high‐altitude surface sites Japan during this period. Model both without photochemical processes order to assess relative importance chemical...
We present detailed 3D structure of Asian dust outflow from a source region to the northwestern Pacific ocean retrieved by NASA/CALIOP onboard CALIPSO and results simulated four‐dimensional variational (4DVAR) data assimilation version transport model (RC4) based on NIES Lidar network. The modeled CALIOP extinction showed good agreement, both for horizontal scale (600–1200 km) vertical depth (1600–3600 m) near regions. Cross‐section analyses RC4 assisted forward trajectory revealed that Gobi...
The spatial and temporal variation of the mineral aerosol concentration its total deposition flux over western North Pacific region were analyzed with a regional chemical transport model (AQPMS) for period March 1994 through May 1995. Dry accounted more than 60% Asian dust throughout period. annual was found to decrease rapidly from coastal area (21 g m −2 yr −1 ) open ocean (0.8 study region. Sporadic events HNLC may increase dissolved iron in seawater hence stimulate marine biological...
A three‐dimensional aerosol transport‐radiation model, SPRINTARS, successfully simulates the long‐range transport of large‐scale Asian dust storms from East Asia to North America which crossed Pacific Ocean during springtime 2001 and 2002. It is found calculated optical thickness that 10 20% around Japan reached America. The simulation also reveals importance contribution anthropogenic aerosols, are carbonaceous sulfate aerosols emitted industrialized areas in Asia, air turbidity storms....
The climatology of surface ozone over East Asia was investigated at a wide range latitudes by integrating continuous measurements from Japanese monitoring networks. Although spring maximum and summer minimum were observed all seven remote stations, significant latitudinal differences in the seasonal cycles found, particularly spring. At low (20–30°N) appears March, while it April high (40–50°N), May middle (30–40°N). A regional‐scale chemical transport model applied to examine factors...
Abstract. Detailed 3-D structures of Trans-Pacific Asian dust transport occurring during 5–15 May 2007 were investigated using the NASA/CALIOP vertical-resolved measurements and a three-dimensional aerosol model (SPRINTARS). Both CALIOP SPRINTARS extinctions showed good agreement along way from source regions across North Pacific into America. A vertically two-layered distribution was observed over northeastern The lower layer originated storm generated in Gobi Desert on 5 May. It...
Abstract. Systematic analyses of interannual and seasonal variations tropospheric NO2 vertical column densities (VCDs) based on GOME satellite data the regional scale chemical transport model (CTM), Community Multi-scale Air Quality (CMAQ), are presented for atmosphere over eastern Asia between 1996 June 2003. A newly developed year-by-year emission inventory (REAS) was used in CMAQ. The horizontal distribution annual averaged VCDs generally agrees well with CMAQ results. However, CMAQ/REAS...