Variability of Tropospheric carbon monoxide and ozone over India using IASI/MetOp sounder and aircraft (MOZAIC) with the simulations of MOZART-4

摘要

In the present study, tropospheric ozone (O_3) and carbon monoxide (CO) havebeen simulated using MOZART-4 (Model for Ozone and Related chemical Tracers-Version4) during 2007-08. The model simulated O_3 and CO are evaluated against the IASI (Infrared Atmospheric Sounding Interferometer) observations and MOZAIC (Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft) measurements. The modeled vertical distributions of O_3 and CO agree well with the MOZAIC observations over central Indian site, Hyderabad. The mean of the simulated O_3 mixing ratio is 51±10 ppbv for LT (lower troposphere) while 57±12 ppbv for MT (middle troposphere). The corresponding observed O_3 mixing ratio is 43±15 ppbv and 49±15 ppbv respectively. The mean of the simulated CO mixing ratio is 137±54 ppbv for LT while 96±20 ppbv for MT. whereas the corresponding observed CO mixing ratio is 151±60 ppbv and 109±25 ppbv respectively. Results show good agreement between the modeled and observed mixing ratios of O_3 and CO with correlation coefficient of 0.69 and 0.80 respectively in the LT whereas 0.60 and 0.39 in MT respectively. The simulated O_3 and CO mixing ratio show good agreement with IASI observations.