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Tropospheric Ozone Over the North Pacific From Ozonesonde Observations

Tropospheric Ozone Over the North Pacific From Ozonesonde Observations. Sam Oltmans J.M. Harris, B.J. Johnson, A.M. Thompson, C.Y. Chan, H.Y. Liu, T. Fujimoto, V.G. Brackett, W.L. Chang, J.-P. Chen, J.-W. Kim, L.Y Chan, H.-W. Chang NOAA Climate Monitoring and Diagnostics Laboratory

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Tropospheric Ozone Over the North Pacific From Ozonesonde Observations

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  1. Tropospheric Ozone Over the North Pacific From Ozonesonde Observations Sam Oltmans J.M. Harris, B.J. Johnson, A.M. Thompson, C.Y. Chan, H.Y. Liu, T. Fujimoto, V.G. Brackett, W.L. Chang, J.-P. Chen, J.-W. Kim, L.Y Chan, H.-W. Chang NOAA Climate Monitoring and Diagnostics Laboratory Boulder, Colorado TRACE-P Workshop June 24-26, 2002

  2. Ozonesonde Stations Operating During TRACE-P Station Latitude Longitude Observations Hilo, Hawaii 19.4oN 155.4oW 1991-present Hong Kong, China 22.2oN 114.3oE 1993-present Taipei, Taiwan 25.0oN 121.4oE 2000-2001 Naha, Japan 26.2oN 127.7oE 1991-present Kagoshima, Japan 31.6oN 130.6oE 1991-present Cheju Island, Korea 33.5oN 126.5oE 2001 Tateno, Japan 36.1oN 140.1oE 1991-present Trinidad Head, Calif. 40.8oN 124.2oW 1997-present Sapporo, Japan 43.1oN 141.3oE 1991-present

  3. Topics Covered • Climatology of tropospheric ozone over the North Pacific. • Ozone during the TRACE-P period (February – April 2001). • Comparison of the February – April 2001 period with longer term averages for these months. • Individual profiles.

  4. Average Ozone Mixing Ratio at Hong Kong (23N) and Taipei (25N) for February – April 2001 Hong Kong Taipei

  5. Trajectory at 3 km on March 27 Solid Line = 00 GMT Dashed Line = 12 GMT Ozone Mixing Ratio at Hong Kong (23N) on March 27, 2001 at 0518 GMT

  6. Trajectory at 10 km on March 27 Solid Line = 00 GMT Dashed Line = 12 GMT Ozone Mixing Ratio at Hong Kong (23N) on March 27, 2001 at 0518 GMT

  7. Trajectory at 13 km on March 27 Solid Line = 00 GMT Dashed Line = 12 GMT Ozone Mixing Ratio at Hong Kong (23N) on March 27, 2001 at 0518 GMT

  8. Ozone Mixing Ratio at Hong Kong (23N) on March 16, 2001 at 0539 GMTand Taipei (25N) on March 16, 2001 at 0700 GMT Hong Kong Taipei

  9. Trajectory at 9 km on March 16 Solid Line = 00 GMT Dashed Line = 12 GMT Ozone Mixing Ratio at Hong Kong (23N) on March 16, 2001 at 0539 GMT

  10. Back Trajectories to Hong Kong on March 16, 2001 at 00 and 12 GMT at 1 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  11. Back Trajectories to Hong Kong on March 16, 2001 at 00 and 12 GMT at 4 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  12. Back Trajectories to Hong Kong on March 16, 2001 at 00 and 12 GMT at 9 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  13. Back Trajectories to Hong Kong on March 16, 2001 at 00 and 12 GMT at 13 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  14. Back Trajectories to Taipei on March 16, 2001 at 00 and 12 GMT at 0.5 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  15. Back Trajectories to Taipei on March 16, 2001 at 00 and 12 GMT at 4 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  16. Back Trajectories to Taipei on March 16, 2001 at 00 and 12 GMT at 9 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  17. Back Trajectories to Taipei on March 16, 2001 at 00 and 12 GMT at 13 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  18. Ozone Mixing Ratio at Taipei (25N) on August 24, 2001 at 0300 GMT

  19. Average Ozone Mixing Ratio at Naha and Hilo for February – April 2001 Hilo Naha

  20. Hilo, Hawaii Average Ozone Mixing Ratio

  21. Hilo, Hawaii Ozone Mixing Ratio for February – April 2001

  22. Average Ozone Mixing Ratio for February – April 2001 compared with long-term average for February – April for Hilo and Hong Kong Hilo Hong Kong  1991-2000  2001 1993-2000  2001

  23. Average Ozone Mixing Ratio for February – April 2001 compared with long-term average for February – April for Naha and Kagoshima Kagoshima Naha 1991-2000  2001  1991-2000  2001

  24. Average Ozone Mixing Ratio for February – April 2001 compared with long-term average for February – April for Tsukuba and Sapporo Sapporo Tsukuba 1991-2000  2001  1991-2000  2001

  25. Average (Clustered) Isentropic Back Trajectories to Hilo 0.5 km for February - April 2001

  26. Average (Clustered) Isentropic Back Trajectories to Hilo 3 km for February - April 2001

  27. Average (Clustered) Isentropic Back Trajectories to Hilo 6 km for February - April 2001

  28. Average (Clustered) Isentropic Back Trajectories to Hilo 9 km for February - April 2001

  29. Ozone Mixing Ratio at Hilo, HI (19.4N) on March 15, 2001 at 1832 GMTand March 16, 2001 at 1828 GMT (0828 HST)

  30. Ozone Mixing Ratio at Naha, Japan (26.2N) on April 6, 2001 at 0530 GMTand April 11, 2001 at 0530 GMT

  31. Average Ozone Mixing Ratio at Kagoshima (32N) and Tateno (36N) for February – April 2001 Kagoshima Tateno

  32. Average Ozone Mixing Ratio at Kagoshima (32N) and Cheju Isl. (33N) for February – April 2001 Kagoshima Cheju Island

  33. Average Ozone Mixing Ratio at Kagoshima (32N) and Cheju Isl. (33N) for February – April 2001  Kagoshima  Cheju Island

  34. Average Ozone Mixing Ratio at Hilo (19N) and Hong Kong (22N) for February – April 2001  Hong Kong  Hilo

  35. Ozone Mixing Ratio at Cheju Island, Korea (33.5N) on March 1, 2001 at 0413 GMT and March 2, 2001 at 0617 GMT March 1, 2001 March 2, 2001

  36. Average Ozone Mixing Ratio at Tateno (36N) and Sapporo (43N) for February – April 2001 Tateno Sapporo

  37. Ozone Mixing Ratio at Tateno, Japan (36N) on February 8, 2001 at 0530 GMT and March 5, 2001 at 0531 GMT March 5, 2001 February 8, 2001

  38. Average Ozone Mixing Ratio at Trinidad Head (41N) and Sapporo (43N) for February – April 2001 Trinidad Head Sapporo

  39. Trinidad Head, CA Ozone Mixing Ratio for February – April 2001

  40. Trinidad Head, California Average Ozone Mixing Ratio for February – April 2001 compared with February – April 1998-2000  2001  1997-2000

  41. Average (Clustered) Isentropic Back Trajectories to Trinidad Head at 0.5 km for February - April 2001

  42. Average (Clustered) Isentropic Back Trajectories to Trinidad Head at 1 km for February – April During the Period 1990 - 1999

  43. Average (Clustered) Isentropic Back Trajectories to Trinidad Head at 3 km for February - April 2001

  44. Average (Clustered) Isentropic Back Trajectories to Trinidad Head at 4 km for February - April for the Period 1990 - 1999

  45. Trinidad Head, California Average Ozone Mixing Ratio (1997-2001)

  46. Ozone Mixing Ratio at Trinidad Head (41N) on April 11, 2001 at 1804 GMTand Sapporo, Japan (43N) April 11, 2001 at 0530 GMT Trinidad Head Sapporo

  47. Back Trajectories to Trinidad Head on April 11, 2001 at 00 and 12 GMT at 4 kmSolid Line = 00 GMT Dashed Line = 12 GMT

  48. Results and Preliminary Conclusions • In the western Pacific south of about 35oN there is more ozone in the lower troposphere (<5km) than in the mid-Pacific or higher latitude lower troposphere. • At Hong Kong there is a March maximum in the mid-troposphere that is isolated from the later spring peak that occurs in May. • All stations show spring maximums but the strongest peaks are in the mid-troposphere at about 30-35oN. • In general the February – April 2001 period seems to have tropospheric ozone amounts that are similar to longer term average amounts. At Kagoshima (32oN) there was about 10% less ozone than the long-term average. • Western Pacific sites south of 30 N show a relative minimum in the upper troposphere.

  49. Trinidad Head, California (41oN) Average Ozone Mixing Ratio

  50. Hilo, Hawaii (20oN) Average Ozone Mixing Ratio

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