Understanding the long-term effects of environmental exposure on roof reflectance in California

被引：31

作者：

Cheng, Meng-Dawn ^{[1
]}

Miller, William ^{[1
]}

New, Joshua ^{[1
]}

Berdahl, Paul ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 26卷 / 01期

关键词：

Absorption; Aerosol; Building envelop; Cool-pigmented roof; Principal component analysis; Reflectance; Soot; ABSORPTION; AEROSOLS;

D O I：

10.1016/j.conbuildmat.2011.06.052

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Contaminants from cool-pigmented roof samples exposed at seven California sites were analyzed for elements and carbons to identify those that degrade or enhance solar reflectance. The losses in solar reflectance varied by site and the color of the sample. The least reflectance drop was observed in the alpine climate, while the largest drop occurred in sites near urban development. The change of reflectance appears cyclical with the onset of seasons having more rainfall. A deposition model suggests that chromium ranks first, iron second, and elemental carbon third in importance to soil light absorption. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：516 / 526

页数：11