1. Status of ozonesonde, AEROCAN and Brewer Measurements

2. A Cast of Thousands Brewer Network Brewer Network –M. Brohart, Technical Support –E. Carty, Database and Internet Support –V. Fioletov, Scientific lead –T. Grajnar, Network Manager –E. Hare, WOUDC Manager –C.T. McElroy, Scientific Support –V. Savastiouk, Algorithm Implementation –Station Operators

3. A Cast of Thousands Continued Ozonesonde Network Ozonesonde Network –J. Davies, Ozonesonde Network Manager –T. Gurdebeke, AMWSD –D. Tarasick, Scientific lead –Station operators

4. A Cast of Thousands Continued AEROCAN AEROCAN –I. Abboud, Technical Support –J. Freemantle, AEROCAN Manager –B. McArthur, MSC Scientific lead –N. O’Neill, CARTEL Scientific co-lead –A. Royer, CARTEL Scientific co-lead –Minh-Nghia Nguyen, CARTEL Algorithm Support –Station Operators

5. Brewer Network

6. Changes to Support RMAF Alter present observation program to include aerosol optical depth (AOD) observations in the UV and transfer data to CMC in real-time. Alter present observation program to include aerosol optical depth (AOD) observations in the UV and transfer data to CMC in real-time. Status: Status: –Winter 2004: Algorithm development completed –Summer 2004: Algorithm testing at Downsview –Autumn 2004: Upload of program to network Brewers –Ongoing: Reprocessing past observations from Brewer network for AODs

7. Next Steps (funding permitted) Improve present determination of SO 2 through better calibration Improve present determination of SO 2 through better calibration For MK IV Brewers implement measurement of columnar NO 2 For MK IV Brewers implement measurement of columnar NO 2 Develop ‘almucantar method’ for determining tropospheric ozone profile Develop ‘almucantar method’ for determining tropospheric ozone profile Add diode array spectrometer for further aerosol and gas observations Add diode array spectrometer for further aerosol and gas observations

8. Ozonesonde Network Addition in 2003 of 4 new S. Canadian stations Addition in 2003 of 4 new S. Canadian stations –Kelowna (49° 53 ’, 119° 29 ’ ) –Bratt ’ s Lake (50° 12 ’, 104° 12 ’ ) –Egbert (CARE) (44° 14 ’, 79° 47 ’ ) –Yarmouth (43° 52 ’, 66° 06 ’ ) Weekly launch of ozonesonde along with regular radiosonde Weekly launch of ozonesonde along with regular radiosonde Capable of special flights in support of other projects (e.g. ozone lidar development) Capable of special flights in support of other projects (e.g. ozone lidar development)

9. Status Installations completed by late Autumn 2003 Installations completed by late Autumn 2003 Nearly one year of data Nearly one year of data Data sent to CMC immediately following flight as part of upper air observations Data sent to CMC immediately following flight as part of upper air observations Data quality assured and then archived in WOUDC Data quality assured and then archived in WOUDC Data to be used for model validation – primary interest is in free troposphere ozone concentrations Data to be used for model validation – primary interest is in free troposphere ozone concentrations

10. Weekly Ozonesonde Profiles

11. AEROCAN Network Cooperative network between NASA, University of Sherbrooke and MSC Cooperative network between NASA, University of Sherbrooke and MSC Harmonization of observation methods and increases sustainability of network Harmonization of observation methods and increases sustainability of network Requires approval of all parties before changes can be implemented Requires approval of all parties before changes can be implemented

12. Changes to Support RMAF Increase the number of stations to provide better coverage for data assimilation Increase the number of stations to provide better coverage for data assimilation Increase the frequency of observations while maintaining the standard NASA AERONET schedule Increase the frequency of observations while maintaining the standard NASA AERONET schedule Alter the dataflow from NASA to University of Sherbrooke for real-time data collection Alter the dataflow from NASA to University of Sherbrooke for real-time data collection Develop data products and quality assurance procedures that enable real-time products Develop data products and quality assurance procedures that enable real-time products

14. Changes in Observations AERONET OBSERVATION SEQUENCE ObservationPresent FrequencyNew Frequency  Individual direct sun triplet o sequence of three direct sun measurements taken 30 seconds apart  at smaller airmasses the interval between measurements is typically 15 minutes  during the large airmass periods direct sun measurements are made at 0.25 airmass intervals  observation of direct sun once per three minutes  Measurement of sky radiance along the solar principal plane (i.e., at constant azimuth angle, with varied scattering angles)  up to nine times per day  Measurement of sky radiance along the solar almucantar (i.e., at constant elevation angle, with varied azimuth angles)  up to six times per day Data TransmissionPresent FrequencyNew Frequency  once per hour  after each observation Data TransmissionPresent MethodolgyNew Methodology  Satellite Transceiver  Internet or Dial-up

15. Change dataflow from present network

16. Present Status (Good News) 4 instruments purchased by March 31, 2004 4 instruments purchased by March 31, 2004 Instruments sent to NASA Goddard for pre-installation check and calibration Instruments sent to NASA Goddard for pre-installation check and calibration Installation at Kelowna completed September Installation at Kelowna completed September Installation at Pickle Lake slated for early November Installation at Pickle Lake slated for early November

17. Kelowna, October 14

18. Kelowna, October 21 http://aeronet.gsfc.nasa.gov/

19. MSC presence at Ft. McMurray does not allow for the installation of an instrument as originally planned. Negotiations underway with NAPS site. MSC presence at Ft. McMurray does not allow for the installation of an instrument as originally planned. Negotiations underway with NAPS site. Chapais site inadequate for observations. Opportunity to use McGill site in Shefferville being explored. Chapais site inadequate for observations. Opportunity to use McGill site in Shefferville being explored. Real-time frequency requirements have yet to be resolved with the manufacturer. Negotiations are in progress. Real-time frequency requirements have yet to be resolved with the manufacturer. Negotiations are in progress. Present Status (OK News)

20. Real-time download design discussions and communications between NASA, CARTEL and Jim Freemantle are ongoing. Real-time download design discussions and communications between NASA, CARTEL and Jim Freemantle are ongoing.

21. Present Status (Bad News) NASA Goddard has been unable to check and calibrate three of the four new instruments since receiving them in January/February. NASA Goddard has been unable to check and calibrate three of the four new instruments since receiving them in January/February. CIMEL (instrument manufacturer) will not provide information on the instrument mechanics, electronics or software to acclimatize the instruments for Canadian wintertime operations. CIMEL (instrument manufacturer) will not provide information on the instrument mechanics, electronics or software to acclimatize the instruments for Canadian wintertime operations. Installations in northern Alberta or Saskatchewan and Quebec will slip into 2005 because of difficulties in finding appropriate sites and lack of instruments Installations in northern Alberta or Saskatchewan and Quebec will slip into 2005 because of difficulties in finding appropriate sites and lack of instruments

22. Next Steps Funding available from CFI grant for developing a sunphotometer calibration centre at the Bratt’s Lake Observatory AEROCAN instruments will not need to go to NASA for maintenance and calibration. Funding available from CFI grant for developing a sunphotometer calibration centre at the Bratt’s Lake Observatory AEROCAN instruments will not need to go to NASA for maintenance and calibration. PDF should arrive in early 2005 to develop the calibration centre and work full-time on implementing the rapid observation routine PDF should arrive in early 2005 to develop the calibration centre and work full-time on implementing the rapid observation routine Need to begin upgrading older sunphotometers in the network to utilize the new procedures. Need to begin upgrading older sunphotometers in the network to utilize the new procedures.