# Presentation: 457270

## Analysis of TES Observations from the 2006 TexAQS/GoMACCS Campaign

**Greg Osterman, Kevin Bowman**
**Jet Propulsion Laboratory**
**California Institute of Technology**
**Jassim Al-Saadi**
**NASA Langley Research Center **
**Brad Pierce**
**NOAA/NESDIS**
**Wallace McMillan**
**University of Maryland Baltimore County**
**Aura Science Meeting**** **
**October 4, 2007**

## Synthesis of satellite observations, in situ measurements, and chemistry and transport models 

- Observations of ozone and carbon monoxide profiles in the free troposphere from TES can provide critical information for studying boundary layer exchange.
- Ground *in situ *observations such as AIRNow are the standard for boundary layer measurements of ozone and its precursors
- Chemistry and transport models such as the real-time air quality modeling system (RAQMS) are the critical link between these two observations
- The TexAQS/GoMACCS Campaign provided opportunities to test the synthesis of these tools

## TES Step & Stare on August 23, 2006

**Notes:**
Find lat/lon for Houston: 30N, 95W. 
lat 30.7607      31.1634      31.5656      31.9684      32.3703      32.7728
lat -93.5331     -93.8417     -93.9456     -94.0504     -94.1554     -94.2613

## Elevated CO and O3 over Houston region observed from TES Step & Stare on August 23, 2006

- Elevated CO and O3 over Houston region observed from TES Step & Stare on August 23, 2006

**Notes:**
Find lat/lon for Houston: 30N, 95W. 
lat 30.7607      31.1634      31.5656      31.9684      32.3703      32.7728
lat -93.5331     -93.8417     -93.9456     -94.0504     -94.1554     -94.2613

## RAQMS CO and O3 Model Fields 

## RAQMS with the TES Observation Operator

## AIRS CO – August 23, 2006

## AIRS & TES CO – August 23, 2006

## AIRS & TES CO – August 23, 2006

## What is the origin of the ozone and CO enhancement?

- TES orbits

-  White lines represent
- 5-day back-trajectories
- emanating from Houston
- AIRNow Metropolitan
- statistical area (MSA) sites

- Each point represents
- ozone averaged over a
- 5-day back-trajectory

- Moderate values (60-70ppb)
- over Houston, but high values
- over Tennessee, Kentucky,
- Alabama, and Arkansas (~80 ppb)

## Process history of O3 and CO

- Ozone production in the boundary layer
- about 4 days prior to arrival in Houston

**Notes:**
TES is upwind of Houston 

## Process history of O3 and CO

- Increase in CO at about the same time

- Ozone production in the boundary layer
- about 4 days prior to arrival in Houston

**Notes:**
TES is upwind of Houston 

## CO coming from Fires in SE US?

- MODIS Fire Count Data for Aug 19-28, 2006

**Notes:**
TES is upwind of Houston 

## Forward Trajectories from TES Observations

## Trajectories of O3 observed by TES at 422 hPa

## Conclusions from Aug 23 Case

- Enhancement in both CO and O3 observed by TES east of the Houston area
- Slightly higher values than in RAQMS fields
- Consistent with AIRS CO and O3
- Model analysis suggests anthropogenic production of ozone from surface emissions at -90 hrs.
- MODIS Rapid Response maps suggest fires burning in SE United States throughout August
- Hysplit trajectories suggest ozone at 850 hPa observed by TES moved back over the Midwestern United States
- O3 observed in upper troposphere appears to come from the Southeastern US
- TES retrievals of CO and O3 vertical profiles in conjunction with the RAQMS global model provide a means of investigating the impact of distant sources on the background concentrations over Texas
- Important concern of TCEQ and other researchers studying Air Quality in Texas
- Ozone at 850 hPa on Aug 23rd, 2006 is above the boundary layer and therefore will have minimal impact on Houston air quality