气候变化领域集成服务门户(CCPortal): A round Earth for climate models

CCPortal

DOI	10.1073/pnas.1908198116
	A round Earth for climate models
	Prather M.J.; Hsua J.C.
发表日期	2019
ISSN	0027-8424
起始页码	19330
结束页码	19335
卷号	116 期号:39
英文摘要	Sunlight drives the Earth's weather, climate, chemistry, and biosphere. Recent efforts to improve solar heating codes in climate models focused on more accurate treatment of the absorption spectrum or fractional clouds. A mostly forgotten assumption in climate models is that of a flat Earth atmosphere. Spherical atmospheres intercept 2.5 W m-2 more sunlight and heat the climate by an additional 1.5 W m-2 globally. Such a systematic shift, being comparable to the radiative forcing change from preindustrial to present, is likely to produce a discernible climate shift that would alter a model's skill in simulating current climate. Regional heating errors, particularly at high latitudes, are several times larger. Unlike flat atmospheres, constituents in a spherical atmosphere, such as clouds and aerosols, alter the total amount of energy received by the Earth. To calculate the net cooling of aerosols in a spherical framework, one must count the increases in both incident and reflected sunlight, thus reducing the aerosol effect by 10 to 14% relative to using just the increase in reflected. Simple fixes to the current flat Earth climate models can correct much of this oversight, although some inconsistencies will remain. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Climate modeling; Solar radiation; Spherical atmospheres
语种	英语
scopus关键词	absorption spectroscopy; aerosol; article; atmosphere; biosphere; cooling; heating; latitude; radiative forcing; skill; solar radiation; sunlight; weather
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160347
作者单位	Prather, M.J., Department of Earth System Science, University of California, Irvine, CA 92697-3100, United States; Hsua, J.C., Department of Earth System Science, University of California, Irvine, CA 92697-3100, United States
推荐引用方式 GB/T 7714	Prather M.J.,Hsua J.C.. A round Earth for climate models[J],2019,116(39).
APA	Prather M.J.,&Hsua J.C..(2019).A round Earth for climate models.Proceedings of the National Academy of Sciences of the United States of America,116(39).
MLA	Prather M.J.,et al."A round Earth for climate models".Proceedings of the National Academy of Sciences of the United States of America 116.39(2019).