干旱区生态环境知识资源中心(Arid): Absorbing Aerosols Workshop, January 20-21, 2016

Arid

DOI	10.2172/1336076
报告编号	BNL--112462-2016
来源ID	OSTI_ID: 1336076
	Absorbing Aerosols Workshop, January 20-21, 2016
	Nasiri, Shaima [Brookhaven National Lab. (BNL), Upton, NY (United States)]; Williamson, Ashley [Brookhaven National Lab. (BNL), Upton, NY (United States)]; Cappa, Christopher D. [Univ. of California, Berkeley, CA (United States)]; Kotamarthi, Davis Rao [Argonne National Lab. (ANL), Argonne, IL (United States)]; Sedlacek, Arthur J. [Brookhaven National Lab. (BNL), Upton, NY (United States)]; Flynn, Conner [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)]; Lewis, Ernie [Brookhaven National Lab. (BNL), Upton, NY (United States)]; McComiskey, Allison [National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States)]; Riemer, Nicole [Univ. of Illinois, Chicago, IL (United States)]
英文摘要	A workshop was held at DOE Headquarters on January 20-21, 2016 during which experts within and outside DOE were brought together to identify knowledge gaps in modeling and measurement of the contribution of absorbing aerosols (AA) to radiative forcing. Absorbing aerosols refer to those aerosols that absorb light, whereby they both reduce the amount of sunlight reaching the surface (direct effect) and heat their surroundings. By doing so, they modify the vertical distribution of heat in the atmosphere and affect atmospheric thermodynamics and stability, possibly hastening cloud drop evaporation, and thereby affecting cloud amount, formation, dissipation and, ultimately, precipitation. Deposition of AA on snow and ice reduces surface albedo leading to accelerated melt. The most abundant AA type is black carbon (BC), which results from combustion of fossil fuel and biofuel. The other key AA types are brown carbon (BrC), which also results from combustion of fossil fuel and biofuel, and dust (crustal material). Each of these sources may result from, and be strongly influenced by, anthropogenic activities. The properties and amounts of AA depend upon various factors, primarily fuel source and burn conditions (e.g., internal combustion engine, flaming or smoldering wildfire), vegetation type (in the case of BC and BrC), and in the case of dust, soil type and ground cover (i.e., vegetation, snow, etc.). After emission, AA undergo chemical processing in the atmosphere that affects their physical and chemical properties. Thus, attribution of sources of AA, and understanding processes AA undergo during their atmospheric lifetimes, are necessary to understand how they will behave in a changing climate.
出版年	2016
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES
URL	http://www.osti.gov/scitech/servlets/purl/1336076
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/271327
推荐引用方式 GB/T 7714	Nasiri, Shaima [Brookhaven National Lab. ,Williamson, Ashley [Brookhaven National Lab. ,Cappa, Christopher D. [Univ. of California, Berkeley, CA ,et al. Absorbing Aerosols Workshop, January 20-21, 2016,2016.