气候变化领域集成服务门户(CCPortal): Influence of More Mechanistic Representation of Particle Dry Deposition on 1850-2000 Changes in Global Aerosol Burdens and Radiative Forcing

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DOI	10.1029/2023MS003952
	Influence of More Mechanistic Representation of Particle Dry Deposition on 1850-2000 Changes in Global Aerosol Burdens and Radiative Forcing
	Clifton, Olivia E.; Bauer, Susanne E.; Tsigaridis, Kostas; Aleinov, Igor; Cowan, Tyler G.; Faluvegi, Gregory; Kelley, Maxwell
发表日期	2024
EISSN	1942-2466
起始页码	16
结束页码	3
卷号	16 期号:3
英文摘要	Robust estimates of historical changes in aerosols are key for accurate constraints on climate sensitivity. Dry deposition is a primary sink of aerosols from the atmosphere. However, most global climate models do not accurately represent observed strong dependencies of dry deposition following turbulent transport on aerosol size. It is unclear whether there is a substantial impact of mischaracterized aerosol deposition velocities on historical aerosol changes. Here we describe improved mechanistic representation of aerosol dry deposition in the NASA Goddard Institute for Space Studies (GISS) global climate model, ModelE, and illustrate the impact on 1850-2000 changes in global aerosol burdens as well as aerosol direct and cloud albedo effects using a set of 1850 and 2000 time slice simulations. We employ two aerosol configurations of ModelE (a bulk mass-based configuration and a configuration that more explicitly represents aerosol size distributions, internal mixing, and microphysics) to explore how model structural differences in aerosol representation alter the response to representation of dry deposition. Both configurations show larger historical increases in the global burdens of non-dust aerosols with the new dry deposition scheme, by 11% in the simpler mass-based configuration and 23% in the more complex microphysical configuration. Historical radiative forcing responses, which vary in magnitude from 5% to 12% as well as sign, depend on the aerosol configuration. Numerical models representing the Earth system are important tools for understanding the drivers of climate change and variability. Particles (also known as aerosols) in the atmosphere can influence climate by scattering or absorbing solar radiation and influencing clouds. How the amount of particles in the atmosphere has changed since preindustrial times is very uncertain. Many processes impact particle spatial distributions and changes with time, as well as how particles influence climate. Sources and sinks of particles need to be represented well in order to have confidence in estimates of changes in particles. Here we more accurately simulate dry deposition, which is a sink of particles, in a numerical model that represents the Earth system, and examine impacts on changes in the amount of particles in the atmosphere from preindustrial times to present day and the particles' influence on climate. ModelE now has process-based representation of aerosol dry deposition, and captures strong observed dependencies on particle size Increases from 1850 to 2000 in the global non-dust aerosol annual burdens are 11%-23% larger with more mechanistic dry deposition Historical radiative forcing responses (-12% to +6%) depend on aerosol representation (e.g., microphysics and mixing state)
英文关键词	aerosol; dry deposition; climate; aerosol microphysics; historical changes
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001179929300001
来源期刊	JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306270
作者单位	National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; Goddard Institute for Space Studies; Columbia University
推荐引用方式 GB/T 7714	Clifton, Olivia E.,Bauer, Susanne E.,Tsigaridis, Kostas,et al. Influence of More Mechanistic Representation of Particle Dry Deposition on 1850-2000 Changes in Global Aerosol Burdens and Radiative Forcing[J],2024,16(3).
APA	Clifton, Olivia E..,Bauer, Susanne E..,Tsigaridis, Kostas.,Aleinov, Igor.,Cowan, Tyler G..,...&Kelley, Maxwell.(2024).Influence of More Mechanistic Representation of Particle Dry Deposition on 1850-2000 Changes in Global Aerosol Burdens and Radiative Forcing.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,16(3).
MLA	Clifton, Olivia E.,et al."Influence of More Mechanistic Representation of Particle Dry Deposition on 1850-2000 Changes in Global Aerosol Burdens and Radiative Forcing".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 16.3(2024).