气候变化领域集成服务门户(CCPortal): A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- And far-infrared

CCPortal

DOI	10.5194/acp-20-12889-2020
	A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- And far-infrared
	Bantges R.J.; Brindley H.E.; Murray J.E.; Last A.E.; Russell J.E.; Fox C.; Fox S.; Harlow C.; O'Shea S.J.; Bower K.N.; Baum B.A.; Yang P.; Oetjen H.; Pickering J.C.
发表日期	2020
ISSN	1680-7316
起始页码	12889
结束页码	12903
卷号	20 期号:21
英文摘要	Measurements of mid- to far-infrared nadir radiances obtained from the UK Facility for Airborne Atmospheric Measurements (FAAM) BAe 146 aircraft during the Cirrus Coupled Cloud-Radiation Experiment (CIRCCREX) are used to assess the performance of various ice cloud bulk optical property models. Through use of a minimization approach, we find that the simulations can reproduce the observed spectra in the mid-infrared to within measurement uncertainty, but they are unable to simultaneously match the observations over the far-infrared frequency range. When both mid- and far-infrared observations are used to minimize residuals, first-order estimates of the spectral flux differences between the best-performing simulations and observations indicate a compensation effect between the midand far-infrared such that the absolute broadband difference is <0.7Wm-2. However, simply matching the spectra using the mid-infrared (far-infrared) observations in isolation leads to substantially larger discrepancies, with absolute differences reaching 1.8 (3.1)Wm-2. These results show that simulations using these microphysical models may give a broadly correct integrated longwave radiative impact but that this masks spectral errors, with implicit consequences for the vertical distribution of atmospheric heating. They also imply that retrievals using these models applied to mid-infrared radiances in isolation will select cirrus optical properties that are inconsistent with far-infrared radiances. As such, the results highlight the potential benefit of more extensive farinfrared observations for the assessment and, where necessary, the improvement of current ice bulk optical models. © Author(s) 2020.
语种	英语
scopus关键词	cirrus; cloud classification; cloud microphysics; computer simulation; numerical model; optical property; radiative forcing; United Kingdom
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247416
作者单位	National Centre for Earth Observation, Imperial College LondonSW7 2AZ, United Kingdom; Department of Physics, Imperial College LondonSW7 2AZ, United Kingdom; Met Office, Exeter, EX1 3PB, United Kingdom; Department of Earth and Environmental Sciences, University of ManchesterM13 9PL, United Kingdom; Science and Technology Corporation, Madison, WI 53705, United States; Department of Atmospheric Sciences, Texas AandM University, College Station, TX 77843, United States; Earth and Mission Science Division, ESA/ESTEC, 2201 AZ, Noordwijk, Netherlands
推荐引用方式 GB/T 7714	Bantges R.J.,Brindley H.E.,Murray J.E.,et al. A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- And far-infrared[J],2020,20(21).
APA	Bantges R.J..,Brindley H.E..,Murray J.E..,Last A.E..,Russell J.E..,...&Pickering J.C..(2020).A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- And far-infrared.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Bantges R.J.,et al."A test of the ability of current bulk optical models to represent the radiative properties of cirrus cloud across the mid- And far-infrared".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).