Application of satellite data in a regional model to improve long-term ozone simulations

作者：Pongprueksa Pruek^*

来源：Journal of Atmospheric Chemistry, 2013, 70(4): 317-340.

DOI：10.1007/s10874-013-9270-9

• CMAQ
• Initial and boundary conditions
• Ozonesonde
• Satellite data
• Tropospheric Ozone

To investigate an alternative technique of providing background and transboundary transport inputs for ozone (O-3) simulations on a regional scale, the EPA's Community Multi-scale Air Quality (CMAQ) model was integrated with high spectral resolution data from the Tropospheric Emission Spectrometer (TES) aboard the NASA's Aura satellite. This study presents a comprehensive model evaluation of O-3 for the entire year of 2009 over the contiguous United States with a focus on the State of Texas using both ozonesonde and ground measurements. While improving model performance in the upper atmosphere, CMAQ's initial and boundary conditions (IC/BC) derived from the original TES data do not improve model performance in the troposphere because the satellite data exaggerated concentration of tropospheric O-3. With a 10-ppb deduction of O-3 concentration from TES, the IC/BC derived from the adjusted TES improves model performance from ground level through the upper atmosphere. The mean bias of daily maximum 8-h average concentration of O-3 (MDA8) from the ground monitored in Texas decreased from 7 ppb to 4 ppb. Model results also show small influences of O-3 from the upper troposphere on the concentrations at the ground level. With a complete exclusion of stratospheric layers, changes of annual mean MDA8 of O-3 concentrations at ground-level were smaller than 1.1 % in Dallas and Houston. In addition, limitations of satellite data are discussed and recommendations are provided regarding the future application of satellite data in regional O-3 simulations.

• 出版日期2013-12