Ozone destruction and production rates between spring and autumn in the Arctic stratosphere

In situ measurements of radical and long‐lived species were made in the lower Arctic stratosphere (18 to 20 km) between spring and early autumn in 1997. The measurements include O3, ClO, OH, HO2, NO, NO2, N2O, CO, and overhead O3. A photochemical box model constrained by these and other observations is used to compute the diurnally averaged destruction and production rates of O3 in this region. The rates show a strong dependence on solar exposure and ambient O3. Total destruction rates, which reach 19%/month in summer, reveal the predominant role of NOx and HOx catalytic cycles throughout the period. Production of O3 is significant only in midsummer air parcels. A comparison of observed O3 changes with destruction rates and transport effects indicates the predominant role of destruction in spring and an increased role of transport by early autumn.

[1]  K. Rosenlof.  Estimates of the seasonal cycle of mass and ozone transport at high northern latitudes , 1999 .

[2]  A sensitivity study of photolysis rate coefficients during POLARIS , 1999 .

[3]  K. K. Perkins,et al.  The coupling of ClONO2, ClO, and NO2 in the lower stratosphere from in situ observations using the NASA ER‐2 aircraft , 1999 .

[4]  D. Fahey,et al.  Preface [to special section on Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS)] , 1999 .

[5]  J. Russell,et al.  Ground‐based observations of Arctic O3 loss during spring and summer 1997 , 1999 .

[6]  Charles Thomas McElroy,et al.  Comparison of modeled and observed values of NO2 and JNO2 during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission , 1999 .

[7]  A. Tuck,et al.  Persistence in Ozone Scaling under the Hurst Exponent as an Indicator of the Relative Rates of Chemistry and Fluid Mechanical Mixing in the Stratosphere , 1999 .

[8]  A. Ravishankara,et al.  Role of nitrogen oxides in the stratosphere: A reevaluation based on laboratory studies , 1999 .

[9]  Jennifer A. Logan,et al.  An analysis of ozonesonde data for the troposphere : recommendations for testing 3-D models and development of a gridded climatology for tropospheric ozone , 1999 .

[10]  D. Fahey,et al.  Summer in the Stratosphere , 1999, Science.

[11]  D. Weisenstein,et al.  A comparison of observations and model simulations of NOx/NOy in the lower stratosphere , 1999 .

[12]  S. Solomon,et al.  Buffering interactions in the modeled response of stratospheric O3 to increased NO x and HO x , 1999 .

[13]  Christopher R. Webster,et al.  Measurements of CO in the upper troposphere and lower stratosphere , 1998 .

[14]  D. Weisenstein,et al.  Distribution of halon-1211 in the upper troposphere and lower stratosphere and the 1994 total bromine budget , 1998 .

[15]  David John Lary.  Catalytic destruction of stratospheric ozone , 1997 .

[16]  D. Fahey,et al.  Partitioning of the reactive nitrogen reservoir in the lower stratosphere of the southern hemisphere: Observations and modeling , 1997 .

[17]  David J. Lary,et al.  Gas phase atmospheric bromine photochemistry , 1996 .

[18]  S. W. Bowen,et al.  The diurnal variation of hydrogen, nitrogen, and chlorine radicals: Implications for the heterogeneous production of HNO2 , 1994 .

[19]  S. Wofsy,et al.  Removal of Stratospheric O3 by Radicals: In Situ Measurements of OH, HO2, NO, NO2, ClO, and BrO , 1994, Science.

[20]  J. Farman,et al.  Ozone photochemistry in the Antarctic stratosphere in summer , 1985 .

[21]  M. Molina,et al.  Chemical kinetics and photochemical data for use in stratospheric modeling , 1985 .