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1Royal Netherlands Meteorological Institute (KNMI), Wilhelminalaan 10, 3732 GK, De Bilt, The Netherlands 2Japan Agency for Marine-Earth Science and Technology, Yokohama, nhật bản 3Graduate School of Environmental Studies, Nagoya University, Nagoya, nhật bản 4Eindhoven University of Technology, Fluid Dynamics Lab, Eindhoven, The Netherlands
1Royal Netherlands Meteorological Institute (KNMI), Wilhelminalaan 10, 3732 GK, De Bilt, The Netherlands 2Japan Agency for Marine-Earth Science và Technology, Yokohama, nhật bản 3Graduate School of Environmental Studies, Nagoya University, Nagoya, nhật bản 4Eindhoven University of Technology, Fluid Dynamics Lab, Eindhoven, The Netherlands Hide tác giả details
Received: 22 May 2012 – Discussion started: 02 Jul 2012 – Revised: 03 Oct 2012 – Accepted: 04 Oct 2012 – Published: 22 Oct 2012
Abstract. We have developed an advanced chemical data assimilation system to combine observations of chemical compounds from multiple satellites. NO2, O3, CO, & HNO3 measurements from the Ozone Monitoring Instrument (OMI), Tropospheric Emission Spectrometer (TES), Measurement of Pollution in the Troposphere (MOPITT), & Microwave Limb Sounder (MLS) satellite instruments are assimilated into the global chemical transport mã sản phẩm CHASER for the years 2006–2007. The CHASER data assimilation system (CHASER-DAS), based on the local ensemble transform Kalman filter technique, simultaneously optimizes the chemical species, as well as the emissions of O3 precursors, while taking their chemical feedbacks into account. With the available datasets, an improved mô tả tìm kiếm of the chemical feedbacks can be obtained, especially related to the NOx-CO-OH-O3 phối of chemical reactions. Comparisons against independent satellite, aircraft, và ozonesonde data show that the data assimilation results in substantial improvements for various chemical compounds. These improvements include a reduced negative tropospheric NO2 column bias (by 40–85%), a reduced negative co bias in the Northern Hemisphere (by 40–90%), and a reduced positive O3 bias in the middle và upper troposphere (from 30–40% to lớn within 10%). These changes are related khổng lồ increased tropospheric OH concentrations by 5–15% in the tropics and the Southern Hemisphere in July. Observing System Experiments (OSEs) have been conducted lớn quantify the relative importance of each data mix on constraining the emissions and concentrations. The OSEs confirm that the assimilation of individual data sets results in a strong influence on both assimilated & non-assimilated species through the inter-species error correlation & the chemical coupling described by the model. The simultaneous adjustment of the emissions and concentrations is a powerful approach khổng lồ correcting the tropospheric ozone budget và profile analyses.
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How to lớn cite. Miyazaki, K., Eskes, H. J., Sudo, K., Takigawa, M., van Weele, M., & Boersma, K. F.: Simultaneous assimilation of satellite NO2, O3, CO, và HNO3 data for the analysis of tropospheric chemical composition & emissions, Atmos. Chem. Phys., 12, 9545–9579, https://doi.org/10.5194/romanhords.com-12-9545-2012, 2012.