# Presentation: 383690

## Sonde data for TES validation

**Jennifer Logan **
**Harvard University**

## Ozonesonde Data

**     ****Data from WOUDC and SHADOZ analyzed at Harvard and provided to TES team for early validation as ascii files in a common format.**
**     ****Obviously bad data omitted**
**April, 2005**
**Data for Sept. 2004 onwards, for 21 stations**
**No regular sonde data at AVDC**
**July, 2005**
**Data for Sept. 2004 onwards, for 10 stations**
**Status of sonde data at AVDC**
**April, 2005:  AVE sonde data at AVDC**
**June, 2005:  SHADOZ data at AVDC**
**September:  CMDL, Canadian data at AVDC**

## Use sonde data to examine:
Are the validation profiles “typical”
Spatial variability of tropospheric ozone on a given day, using European stations
Temporal variability using European data

Use TOMS data to examine:
Temporal variability at sonde locations - mainly reflects the stratosphere

Contrast mid-latitude and tropical profiles

MOZAIC data in Europe would be best for looking at tropospheric variability vs. time, but not yet available
MOZAIC data for August 2004 just released.

**Are the validation profiles “typical”**
**Spatial variability of tropospheric ozone on a given day, using European stations**
**Temporal variability using European data**
_**Use TOMS data to examine:**_
**Temporal variability at sonde locations - mainly reflects the stratosphere**
_**Contrast mid-latitude and tropical profiles**_
**MOZAIC data in Europe would be best for looking at tropospheric variability vs. time, but not yet available**
**MOZAIC data for August 2004 just released.**

## Most stations have weekly data

## Are the sonde data from fall 2004 typical?  

**Variability is very high in UT/LS****	**
**Variability is higher in spring than in fall.**
**TES averaging kernels are broad, so need good match in space/time**

**Black:  mean ****± one sd.,**
** ****for 1985-2000.**

**Color - profiles on Nov. 5, 10, 12**

**TROP.**

**STRAT.**

## Spatial variability on the same day - Oct. 13, 2004

- Hohen., Payerne: 330 km apart
- Legion., Linden:  470 km
- Hoh/Pay. to Lind./Leg:  540-1190 km

- Payerne and Hohen. very similar
- up to 400 hPa.

**Oct. 13**

**TROP.**

**STRAT.**

## Another example  - November 10

## Nov. 5th:  ~15 ppb difference, almost 50%.

**Nov. 5th:  ~15 ppb difference, almost 50%.**
**Can TES differentiate such a gradient?**

## Median difference between two stations 330 km apartand 25th and 75th percentiles

**Median difference is mostly <10% in  the trop., but differences often exceed 30% more than 25% of the time in the UT/LS**

## Temporal differences:  large in UT/LSNo daily data available - 2 day differences

- All profiles within a week of central (blue) profile

- Compare
- blue and turquoise,  brown and purple,
- green and red

## Another example - Hohenpeissenberg, Nov.

**Soundings on Wed/Fri in fall,**
**Mon., Wed., Fri. in winter/spring**

## Daily ozone columns from TOMS Columns indicate when temporal variability is an issue 

**Dashed lines:  month start**
**Red line:  TES match**

## Comparison of mid-latitude and tropical variability

**Comparison of mid-latitude and tropical variability**
**     ****All profiles in two months**

**TROP.**

**STRAT**

**Payerne **
**Oct-Nov**

**Ascension**
**Sept-Oct**

## Issues:  

**Issues:****  **
**The criteria used so far for TES give relatively few matches, even with data from 20-30 locations.**
**Stricter criteria => fewer matches**
**Analysis of MOZAIC data will provide daily profiles, and show trop. variability for Europe, as 5 flights in one day - but only for 0-11 km.**

## MOZAIC flights offer the chance to examine variability on short time scales - but note that “profiles” are not vertical.  They are within 250 km of each airport

**Profiles measured **
**within ~24 h**

**~10 h**

**~24h**

**~17 h**

**Winter**

**Summer**