Aerosols
; Air quality
; Climate models
; Air quality models
; Converting temperatures
; Integrated models
; Nudging
; Radiative effects
; Regional climate
; Temperature changes
; Top of atmospheres
; Atmospheric temperature
; aerosol
; air quality
; climate modeling
; data assimilation
; error correction
; integrated approach
; radiative transfer
; regional climate
; temperature
; top of atmosphere
; tracer
; troposphere
; aerosol
; air quality
; air temperature
; Article
; atmosphere
; climate
; controlled study
; meteorology
; priority journal
; radiation
; simulation
; surface property
; troposphere
Scopus学科分类:
Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
Nudging (data assimilation) is used in many regional integrated meteorology-air quality models to reduce biases in simulated climatology. However, in such modeling systems, temperature changes due to nudging could compete with temperature changes induced by radiatively active and hygroscopic short-lived tracers leading to two interesting dilemmas: when nudging is continuously applied, what are the relative sizes of these two radiative forces at regional and local scales? How do these two forces present in the free atmosphere differ from those present at the surface? This work studies these two issues by converting temperature changes due to nudging into pseudo radiative effects (PRE) at the surface (PRE_sfc), in troposphere (PRE_atm), and at the top of atmosphere (PRE_toa), and comparing PRE with the reported aerosol radiative effects (ARE). Results show that the domain-averaged PRE_sfc is smaller than ARE_sfc estimated in previous studies and this work, but could be significantly larger than ARE_sfc at local scales. PRE_atm is also much smaller than ARE_atm. These results indicate that appropriate nudging methodology could be applied to the integrated models to study aerosol radiative effects at continental/regional scales, but it should be treated with caution for local scale applications. � 2017
Systems Exposure Division, National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States; Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States; Research Center for Air Pollution and Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, Zhejiang, China; Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, Zhejiang, China
Recommended Citation:
He J,, Glotfelty T,, Yahya K,et al. Does temperature nudging overwhelm aerosol radiative effects in regional integrated climate models?[J]. Atmospheric Environment,2017-01-01,154