Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Jinyuan Xin; Yuesi Wang; Zhanqing Li; Pucai Wang; Wei Min Hao; Bryce L. Nordgren; Shigong Wang; Guangren Lui; Lili Wang; Tianxue Wen; Yang Sun; Bo Hu
    Date: 2007
    Source: Journal of Geophysical Research. 112: D05203. doi: 10.1029/2006JD007075.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (3.7 MB)

    Description

    To reduce uncertainties in the quantitative assessment of aerosol effects on regional climate and environmental changes, extensive measurements of aerosol optical properties were made with handheld Sun photometers in the Chinese Sun Hazemeter Network (CSHNET) starting in August 2004. Regional characteristics of the aerosol optical depth (AOD) at 500 nm and Angstrom exponent (alpha) computed using 405, 500, and 650 nm were analyzed for the period of August 2004 to September 2005. The smallest mean AOD (~0.15) was found in the Tibetan Plateau where alpha showed the largest range in value (0.06-0.9). The remote northeast corner of China was the next cleanest region with AODs ranging from 0.19 to 0.21 and with the largest alpha (1.16-1.79), indicating the presence of fine aerosol particles. The forested sites exhibited moderate values of AOD (0.19-0.51) and alpha (0.97-1.47). A surprising finding was that the AOD measured at a few desert sites in northern China were relatively low, ranging from 0.24 to 0.36, and that alpha ranged from 0.42 to 0.99, presumably because of several dustblowing episodes during the observation period. The AOD observed over agricultural areas ranges from 0.38 to 0.90; alpha ranges from 0.55 to 1.11. These values do not differ much from those observed at the inland urban and suburban sites where AOD ranges from 0.50 to 0.69 and alpha ranges from 0.90 to 1.48. Given the geographic heterogeneity and the rapid increase in urbanization in China, much longer and more extensive observations are required.

    Publication Notes

    • You may send email to rmrspubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Xin, Jinyuan; Wang, Yuesi; Li, Zhanqing; Wang, Pucai; Hao, Wei Min; Nordgren, Bryce L.; Wang, Shigong; Lui, Guangren; Wang, Lili; Wen, Tianxue; Sun, Yang; Hu, Bo. 2007. Aerosol optical depth (AOD) and Angstrom exponent of aerosols observed by the Chinese Sun Hazemeter Network from August 2004 to September 2005. Journal of Geophysical Research. 112: D05203. doi: 10.1029/2006JD007075.

    Keywords

    aerosol optical depth (AOD), Angstrom exponent of aerosols, Chinese Sun Hazemeter Network (CSHNET)

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/32777