气候变化领域集成服务门户(CCPortal): Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles

CCPortal

DOI	10.5194/tc-13-1753-2019
	Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles
	Schneider A.; Flanner M.; De Roo R.; Adolph A.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1753
结束页码	1766
卷号	13 期号:6
英文摘要	Broadband snow albedo can range from 0.3 to 0.9 depending on microphysical properties and light-absorbing particle (LAP) concentrations. Beyond the widely observed direct and visibly apparent effect of darkening snow, it is still unclear how LAPs influence snow albedo feedbacks. To investigate LAPs' indirect effect on snow albedo feedbacks, we developed and calibrated the Near-Infrared Emitting and Reflectance-Monitoring Dome (NERD) and monitored bidirectional reflectance factors (BRFs) hourly after depositing dust and black carbon (BC) particles onto experimental snow surfaces. After comparing snow infrared BRFs to snow specific surface areas (SSAs), we found that both measured and modeled snow infrared BRFs are correlated with snow SSA. These results, however, demonstrate a considerable uncertainty of ±10m2 kg-1 in the determination of snow SSA from our BRF measurements. The nondestructive technique for snow SSA retrieval that we present here can be further developed for science applications that require rapid in situ snow SSA measurements. After adding large amounts of dust and BC to snow, we found more rapid decreasing of snow BRFs and SSAs in snow with added LAPs compared to natural (clean) snow but only during clear-sky conditions. These results suggest that deposition of LAPs onto snow can accelerate snow metamorphism via a net positive snow grain-size feedback. © 2019 Author(s).
学科领域	albedo; bidirectional reflectance; black carbon; clear sky; concentration (composition); grain size; metamorphism; near infrared
语种	英语
scopus关键词	albedo; bidirectional reflectance; black carbon; clear sky; concentration (composition); grain size; metamorphism; near infrared
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118869
作者单位	Department of Climate and Space Sciences and Engineering, Climate and Space Research Building, University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109-2143, United States; Physics Department, St. Olaf College, 1520 St. Olaf Ave., Northfield, MN 55057, United States
推荐引用方式 GB/T 7714	Schneider A.,Flanner M.,De Roo R.,et al. Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles[J],2019,13(6).
APA	Schneider A.,Flanner M.,De Roo R.,&Adolph A..(2019).Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles.The Cryosphere,13(6).
MLA	Schneider A.,et al."Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles".The Cryosphere 13.6(2019).