DOI: 10.1073/pnas.1908198116
论文题名: A round Earth for climate models
作者: Prather M.J. ; Hsua J.C.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期: 39 起始页码: 19330
结束页码: 19335
语种: 英语
英文关键词: Climate modeling
; Solar radiation
; Spherical atmospheres
Scopus关键词: absorption spectroscopy
; aerosol
; article
; atmosphere
; biosphere
; cooling
; heating
; latitude
; radiative forcing
; skill
; solar radiation
; sunlight
; weather
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163531
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Prather M.J.,Hsua J.C.. A round Earth for climate models[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(39)