Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites

Laulainen, N S; Larson, N R; Michalsky, J J; Harrison, L C

Title: Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites

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Abstract

Routine, automated solar radiometry observations began with the development of the Mobile Automated Scanning Photometer (MASP) and its installation at the Rattlesnake Mountain Observatory (RMO). We have introduced a microprocessor controlled rotating shadowband radiometer (RSR), both the single detector and the multi-filter/detector (MFRSR) versions to replace the MASP. The operational mode of the RSRs is substantially different than the MASP or other traditional sun-tracking radiometers, because, by virtue of the automated rotating shadowband, the total and diffuse irradiance on a horizontal plane are measured and the direct-normal component deduced through computation from the total and diffuse components by the self-contained microprocessor. Because the three irradiance components are measured using the same detector for a given wavelength, the calibration coefficients are identical for each component, thus reducing errors when comparing them. The MFRSR is the primary radiometric instrument in the nine-station Quantitative Links Network (QLN) established in the eastern United States in late 1991. Data from this network are being used to investigate how cloud- and aerosol-induced radiative effects vary in time and with cloud structure and type over a mid-latitude continental region. This work supports the DOE Quantitative Links Program to quantify linkages between changes in atmospheric composition and climatemore »« less

Authors:

Laulainen, N S; Larson, N R ^[1]; Michalsky, J J; Harrison, L C ^[2]

Pacific Northwest Lab., Richland, WA (United States)
State Univ. of New York, Albany, NY (United States)

Publication Date:: Sat Jan 01 00:00:00 EST 1994

Research Org.:: Pacific Northwest Lab., Richland, WA (United States)

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10129958

Report Number(s):: PNL-SA-22899; CONF-940115-29
ON: DE94007476

DOE Contract Number:: AC06-76RL01830

Resource Type:: Conference

Resource Relation:: Conference: 8. Joint conference on applications of air pollution meterology. 74. American Meteorological Society annual meeting,Nashville, TN (United States),23-28 Jan 1994; Other Information: PBD: Jan 1994

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; AEROSOLS; AEROSOL MONITORING; RADIOMETERS; OPTICAL DEPTH CURVE; VOLCANOES; USA; SEASONAL VARIATIONS; 540110; 540120; BASIC STUDIES; CHEMICALS MONITORING AND TRANSPORT

Citation Formats


                    Laulainen, N S, Larson, N R, Michalsky, J J, and Harrison, L C. Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites.  United States: N. p., 1994. 
        Web.

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                    Laulainen, N S, Larson, N R, Michalsky, J J, & Harrison, L C. Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites.  United States.

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                    Laulainen, N S, Larson, N R, Michalsky, J J, and Harrison, L C. 1994.  
        "Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites".  United States.  https://www.osti.gov/servlets/purl/10129958.

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@article{osti_10129958,

  title        = {Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites},

  author       = {Laulainen, N S and Larson, N R and Michalsky, J J and Harrison, L C},

  abstractNote = {Routine, automated solar radiometry observations began with the development of the Mobile Automated Scanning Photometer (MASP) and its installation at the Rattlesnake Mountain Observatory (RMO). We have introduced a microprocessor controlled rotating shadowband radiometer (RSR), both the single detector and the multi-filter/detector (MFRSR) versions to replace the MASP. The operational mode of the RSRs is substantially different than the MASP or other traditional sun-tracking radiometers, because, by virtue of the automated rotating shadowband, the total and diffuse irradiance on a horizontal plane are measured and the direct-normal component deduced through computation from the total and diffuse components by the self-contained microprocessor. Because the three irradiance components are measured using the same detector for a given wavelength, the calibration coefficients are identical for each component, thus reducing errors when comparing them. The MFRSR is the primary radiometric instrument in the nine-station Quantitative Links Network (QLN) established in the eastern United States in late 1991. Data from this network are being used to investigate how cloud- and aerosol-induced radiative effects vary in time and with cloud structure and type over a mid-latitude continental region. This work supports the DOE Quantitative Links Program to quantify linkages between changes in atmospheric composition and climate forcing. In this paper we describe the setup of the QLN and present aerosol optical depth results from the on-going measurements at PNL/RMO, as well as preliminary results from the QLN. From the time-series of data at each site, we compare seasonal variability and geographical differences, as well as the effect of the perturbation to the stratosphere by Mt. Pinatubo. Analysis of the wavelength dependence of optical depth also provides information on the evolution and changes in the size distribution of the aerosols.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/10129958},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sat Jan 01 00:00:00 EST 1994},

  month        = {Sat Jan 01 00:00:00 EST 1994}

}

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