Vertical distribution of atmospheric aerosol size distribution over south-central New Mexico |
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| Institution: | 1. Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, U.S.A.;2. Aerosol Research Section, NOAA/ERL/ARL, 325 Broadway, Boulder, CO 80303, U.S.A.;1. Departament of Physics, Federal Institute of Education, Science and Technology of Pará, IFPA, Bragança, PA, Brazil;2. Departament of Environmental Engineering, Federal University of Paraná, UFPR, Caixa Postal 19100, Curitiba, PR 81531-990, Brazil;3. Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, USA;4. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA;1. Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, Jiangsu 210023, China;2. State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, Jiangsu 210023, China;3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, Jiangsu 210023, China;4. Department of Geography, University of Wisconsin-Madison, Madison, USA;5. School of Integrative Plant Sciences, Section of Soil & Crop Sciences, Cornell University, Ithaca, NY 14853, USA;1. Division of Global Architecture, Graduate School of Engineering, Osaka University, Japan;2. Department of Architecture, Graduate School of Engineering, Osaka City University, Japan;1. Lawrence Berkeley National Laboratory, Berkeley, CA, USA;2. Global Climate Adaptation Partnership, Oxford, UK;3. NIWA, Wellington, New Zealand;4. Met Office Hadley Centre, FitzRoy Road, Exeter, UK;5. University of New South Wales, Sydney, New South Wales, Australia;6. University of Melbourne, Melbourne, Victoria, Australia;7. NOAA Earth System Research Laboratory, Boulder, CO, USA;8. National Institute for Environmental Studies, Tsukuba, Japan;9. University of Cape Town, Rondebosch, Western Cape, South Africa;10. ETH Zürich, Zurich, Switzerland;11. University of East Anglia, Norwich, UK;12. University of Gothenburg, Gothenburg, Sweden;13. University of Southern Queensland, Toowoomba, Queensland, Australia |
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| Abstract: | The vertical distribution of background atmospheric aerosols was measured over south-central New Mexico as a part of the Atmospheric Lidar Verification Experiment (ALIVE) during four research field periods in the summers and winters of 1989 and 1990. Aerosol size distribution was measured from the surface up to 4500 m above sea level (asl) over the particle size range 0.1∼32 μm, using two Particle Measuring Systems (PMS) probes mounted on the wings of the NOAA King Air research aircraft. Vertical profiles of aerosol number concentrations of both fine- (0.1–2.0 μm) and coarse- (>2.0 μm) particle modes show seasonal differences, with higher number concentrations and higher mixed layer heights during summers. The measured aerosol size distribution data of each ALIVE intensive were averaged for boundary layer and free troposphere regions. These data mostly exhibit bi-modal distributions, typical for the continental atmospheric aerosols. Exceptions were the free troposphere size distributions measured during December 1989 (ALIVE III) and June 1990 (ALIVE IV), which resemble Junge's power-law distribution. Each of the averaged aerosol size distributions was approximated by the sum of log-normal distributions. Different characteristics of aerosol size distribution were observed between the two summer measurements of 1989 and 1990. Back-trajectory analysis revealed that decreased aerosol concentrations were observed during June 1990 when the air mass was transported from the southwestern U.S.A. |
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