1 mike3/papers/tropoz/aguf98 12/2/98 16:30 m.j. newchurch, k.a. fuller, d.a. bowdle university of...

1Mike3/papers/tropoz/aguf98 12/2/98 16:30

M.J. Newchurch, K.A. Fuller,D.A. Bowdle

University of Alabama in Huntsville

Working Group on Space-Based Lidar Winds, June 29 - July 1, 2004,

Frisco, Colorado

Update on RAPCDInfrastructure, Instrumentation, and Science

RAPCD opened Spring 2003

Several instruments fully operational

Meso-scale chemical transport models fully operational

Other instruments in progress

Unique research tool for scientists and students


RAPCD Motivation

Improved Air Quality Forecasting

trace gases, especially ozone

aerosols, especially hygroscopic and organic

surface, lower troposphere, vertical fluxes, clouds


Major mismatch between measured and modeled tropospheric ozone

(July 4) (July 19) (July 24)(June29)

TN

LON: -86.57, LAT: 36.25


Huntsville Ozonesonde Station


Schematic of the OZONE Differential Absorption Lidar (DIAL)

YAG laser 1

YAG laser 2 Dye laser 2-Off absorption-

Telescope

Detection & data acquisition

Dye laser 1-On absorption-SeparatorDoubler

Doubler Separator

=1064nm

=1064nm

=1064nm

=1064nm

=532nm

=532nm

=291nm

=285nm

=582nm

=570nm

=578nm

=598nm

Doubler & Separator

Doubler & Separator

Measure vertical profiles of ozone

from the earth surface to the free troposphere using the difference in

atmospheric absorption at 285

and 291 nm. Telescop

e

Ozone DIAL first light


NPS: Annual average extinction coefficients (Mm-1 )

‘Hot Topics’ in Aerosols and ForcingChemical composition• Speciation• Hygroscopicity

Physical properties• Size distribution• MorphologyRadiometric Properties• Extinction• Scattering• Absorption• PolarimetricForcing / Remote Sensing• Optical depth• Albedo• Polarization• Distribution of scattered light• Vertical structure

Huntsville, AL. A Researcher’s Paradisefor Science of the Atmospheric Aerosol


Scanning aerosol lidar


MSFC Ground-based Doppler Wind Lidar

andchimney


RAPCD rooftop platform for sky-viewing instruments


AORApplied Microparticle Optics and Radiometry


generator

915 MHzradar antenna

(without clutter panels)

sodar

5 m mast

wind

pyranometer GPS receiver

T, RH

electronics inside

ceilometer

(Without clutter panels -- 15 min setup time)

Mobile Integrated Profiler System


Standard MM5

• Unrealistic energy reaching the surface

• Clouds at wrong place/wrong time

• Clouds being too opaque

Satellite Assimilation

• Direct insertion of satellite observed insolation

• Clouds at right place/right time

• Cloud’s impact not exaggerated

Data Assimilation in MM5


NSSTC Regional Atmospheric Profiling Center

for DiscoveryRAPCD

Planned MEASUREMENTS

Atmospheric profiles of aerosols, gases, winds, temperature• Tunable lidar, ozonesondes, and DOAS spectrometer

- O3, NO2, NO3, HCHO, H2O• Aerosols and clouds with lidar, sodar, and ceilometer• Ice/water discrimination with lidar depolarization signals• Winds with Doppler lidar, Doppler radar, and sonde• Temperature with RASS and sonde

Ground-based radiation• Column-integrated aerosols and gases with FTIR, MFRSR, Brewer

Characteristics of atmospheric aerosols with FTIR and MOUDI• Optical properties• Chemical composition• Water uptake, reactivity with other trace gases



for DiscoveryRAPCD

APPLICATIONS

Satellite validation• Tropospheric ozone (TOMS, OMI, TES, AIRS, GOME, SCHIMACHY)• SO2, HCHO, NO2• Aerosols (MISR, MODIS, NPOESS, TOMS)• Winds (GTWS)

Chemistry and Aerosols• regional air pollution• Stratospheric/Tropospheric Exchange• PBL convection/entrainment/venting• Large Eddy Simulation• Lightning NOx impact on ozone• Regional climate forcing• Visual air quality



for DiscoveryRAPCD

Applications

Diurnal and long-term investigation of • ozone and aerosol climatology, horizontal and vertical transport• heterogeneous chemistry, including gas to particle conversion• cloud processing and cloud venting of chemical pollutants• water uptake by aerosols, effects on visibility and cloud formation• correlation between ozone profiles and synoptic and regional scale weather• stratosphere as a source for local and regional ozone pollution.

Combine with similar systems in the NE and Rocky Mountains to• investigate large scale budgets and transport of ozone and aerosol • assess model predictions


The UAH Atmospheric Chemistry Program

Collaborators

Global Hydrology and Climate Center / MSFCLaboratory for Atmospheres / GSFC

Climate Diagnostics and Monitoring Lab / NOAAAtmospheric Chemistry Division / NCAR

Aerosol Research Branch /LaRCAtmospheric Chemistry Division / JPL

Aeronomy Lab / NOAANational Weather Service

Cal State, NorthridgeCal Tech

Georgia TechHampton UniversityHarvard University

Pusan National University, S. KoreaSt. Louis University

St. Petersburg University, Russia


nsstc.uah.edu/atmchem

1 mike3/papers/tropoz/aguf98 12/2/98 16:30 m.j. newchurch, k.a. fuller, d.a. bowdle university of...

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