Tropospheric Ozone Changes:

Observations, state of understanding, and modeling requirements

Workshop at NOAA Earth System Research Laboratory, Boulder, Colorado USA

October 14-16, 2009

The workshop will focus on measurement series ~15 years or longer in length and aims at a critical review of ozonesonde, surface, and aircraft measurements and more recently satellite observations. It will address the quality of individual datasets, their suitability for inferring the long-term behavior of ozone, the consistency of data sets with each other (see figure below), and statistical methods of time series analysis. One goal of the workshop is to provide better understanding of the observational limitations and constraints of the existing records. The measurement community and those engaged in analyses of the data will share their expertise. The workshop will also benefit from modelers who have looked at longer term changes in tropospheric ozone and can lend their perspective on how observations and modeling can be combined to lead to a better understanding of changes in tropospheric ozone. A major goal of the workshop is to determine what the robust changes in ozone have been in various regions as inferred from the entire suite of reliable data. The agenda will include an opportunity for presentations on:

Figure: Comparison of ozonesonde and aircraft data over Europe (from J. Logan)


If you plan on attending the conference, please complete the online registration. Registration has closed
You can also email your plans to attend and presentation topic to:



The hotels listed below have been contacted about the workshop. Two of them have set aside rooms for the workshop. This is a very busy weekend in Boulder. The rooms set aside for the workshop will be held until September 13, 2009. If you plan to attend the workshop, early hotel reservations are advised. Information on other hotels in Boulder is given below under “Lodging Information”.

Millennium Harvest House
1345 28th Street Boulder, Colorado 80302
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Best Western Boulder Inn
770 28TH Street Boulder, Colorado 80303-2343
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Boulder Outlook Hotel & Suites
800 28TH Street Boulder, Colorado 80303
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Getting to ESRL

ESRL is located in the David Skaggs Research Center (DSRC) at 325 Broadway, in Boulder, Colorado, next to the Department of Commerce National Institute of Science and Technology (NIST) building.
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Map of driving route from DIA to Boulder and NOAA.

Driving Directions from DIA

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By Bus

Regional bus service to Boulder is available through the RTD. The B bus provides regional service between Denver and Boulder. The Flatiron Park-n-Ride (Broadway and 27th Way) is the closest stop to ESRL and is on the Skip, Bound, 204, 227, AB, B, D, G, and J bus routes.

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Lodging Information

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