气候变化领域集成服务门户(CCPortal): Retrievals of High-Latitude Surface Emissivity Across the Infrared From High-Altitude Aircraft Flights

CCPortal

DOI	10.1029/2020JD033672
	Retrievals of High-Latitude Surface Emissivity Across the Infrared From High-Altitude Aircraft Flights
	Murray J.E.; Brindley H.E.; Fox S.; Bellisario C.; Pickering J.C.; Fox C.; Harlow C.; Smith M.; Anderson D.; Huang X.; Chen X.; Last A.; Bantges R.
发表日期	2020
ISSN	2169897X
卷号	125 期号:22
英文摘要	We present retrievals of infrared spectral surface emissivities spanning the far infrared and mid-infrared from aircraft observations over Greenland, taken at an altitude of 9.2 km above sea level. We describe the flight campaign, available measurements, and the retrieval method. The principal barriers to reducing uncertainty in the emissivity retrievals are found to be instrumental noise and our ability to simultaneously retrieve the underlying surface temperature. However, our results indicate that using the instrumentation available to us it is possible to retrieve emissivities from altitude with an uncertainty of ~0.02 or better across much of the infrared. They confirm that the far-infrared emissivity of snow and ice surfaces can depart substantially from unity, reaching values as low as 0.9 between 400 and 450 cm−1. They also show good consistency with retrievals from the same flight made from near-surface observations giving confidence in the methodology used and the results obtained for this more challenging viewing configuration. To the best of our knowledge, this is the first time that far-infrared surface emissivity has been retrieved from altitude and demonstrates that the methodology has the potential to be extended to planned satellite far-infrared missions. ©2020. The Authors.
英文关键词	far-infrared radiation; ice-emissivity feedback; surface radiation budget; surface spectral emissivity; surface temperature and emissivity retrieval
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185649
作者单位	Space and Atmospheric Physics Group, Imperial College London, London, United Kingdom; National Centre for Earth Observation, Imperial College London, London, United Kingdom; Met Office, Exeter, United Kingdom; Now at DOTA, ONERA, Palaiseau, France; Facility for Airborne Atmospheric Measurements (FAAM), Cranfield, United Kingdom; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Murray J.E.,Brindley H.E.,Fox S.,et al. Retrievals of High-Latitude Surface Emissivity Across the Infrared From High-Altitude Aircraft Flights[J],2020,125(22).
APA	Murray J.E..,Brindley H.E..,Fox S..,Bellisario C..,Pickering J.C..,...&Bantges R..(2020).Retrievals of High-Latitude Surface Emissivity Across the Infrared From High-Altitude Aircraft Flights.Journal of Geophysical Research: Atmospheres,125(22).
MLA	Murray J.E.,et al."Retrievals of High-Latitude Surface Emissivity Across the Infrared From High-Altitude Aircraft Flights".Journal of Geophysical Research: Atmospheres 125.22(2020).