World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Aerosol Shortwave Daily Radiative Effect and Forcing Based on Modis Level 2 Data in the Eastern Mediterranean (Crete) : Volume 11, Issue 7 (12/07/2011)

By Benas, N.

Click here to view

Book Id: WPLBN0003990517
Format Type: PDF Article :
File Size: Pages 45
Reproduction Date: 2015

Title: Aerosol Shortwave Daily Radiative Effect and Forcing Based on Modis Level 2 Data in the Eastern Mediterranean (Crete) : Volume 11, Issue 7 (12/07/2011)  
Author: Benas, N.
Volume: Vol. 11, Issue 7
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Fotiadi, A., Matsoukas, C., Hatzianastassiou, N., Vardavas, I., Mihalopoulos, N., & Benas, N. (2011). Aerosol Shortwave Daily Radiative Effect and Forcing Based on Modis Level 2 Data in the Eastern Mediterranean (Crete) : Volume 11, Issue 7 (12/07/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Physics, University of Crete, Greece. The mean daily shortwave (SW) radiation budget was computed on a 10 km × 10 km resolution above FORTH-CRETE AERONET station in Crete, Greece, for the 9-yr period from 2000 to 2008. The area is representative of the Eastern Mediterranean region, where air pollution and diminishing water resources are exacerbated by high aerosol loads and climate change. The present study aims to quantify the aerosol direct effect and forcing on the local energy budget. A radiative transfer model was used, with daily climatological data from the Moderate Resolution Imaging Spectroradiometer (MODIS), on board NASA's Terra and Aqua satellites. The radiative fluxes were computed at the surface, within the atmosphere and at the top of atmosphere (TOA). Downward surface fluxes and aerosol optical thickness (AOT) were validated against ground measurements. Daily fluxes reveal the direct radiative effects of dust events, with mean daily values reaching up to −100, 55 and −30 W m−2 at the surface (cooling), within the atmosphere (warming) and at TOA (cooling), respectively. Mean monthly values show a decreasing trend of the aerosol direct radiative effect, in agreement with a similar trend in AOT. The analysis of the contribution of anthropogenic and natural aerosol show major peaks of natural aerosol direct effect occurring mainly in spring, while a summer maximum is attributed to anthropogenic aerosol. During their peaks, anthropogenic aerosol forcing can reach values of −15 W m−2 at the surface, 8 W m−2 in the atmosphere and over −4 W m−2 at TOA (monthly mean values). The corresponding daily peak values for natural aerosol are over −10 W m−2, 6 W m−2 and −3 W m−2. Annual mean values and standard deviations (interannual variability) of anthropogenic aerosol forcing are −10 ± 3 W m−2 at the surface, 5 ± 1 W m−2 in the atmosphere and −3 ± 1 W m−2 at TOA, while the corresponding values for natural aerosol are −6 ± 2 W m−2, 3 ± 1 W m−2 and −3 ± 1 W m−2.

Summary
Aerosol shortwave daily radiative effect and forcing based on MODIS Level 2 data in the Eastern Mediterranean (Crete)

Excerpt
Andreae, T. W., Andreae, M. O., Ichoku, C., Maenhaut, W., Cafmeyer, J., Karnieli, A., and Orlovsky, L.: Light scattering by dust and anthropogenic aerosol at a remote site in the Negev desert, Israel, J. Geophys. Res., 107(D2), 4008, doi:10.1029/2001JD900252, 2002.; Allen, C. W.: Astrophysical Quantities, 3rd ed., The Athlone Press, University of London, 1976.; Bergamo, A., Tafuro, A. M., Kinne, S., De Tomasi, F., and Perrone, M. R.: Monthly-averaged anthropogenic aerosol direct radiative forcing over the Mediterranean based on AERONET aerosol properties, Atmos. Chem. Phys., 8, 6995–7014, doi:10.5194/acp-8-6995-2008, 2008.; Chou, M.-D., Chan, P.-K., and Wang, M.: Aerosol radiative forcing derived from SeaWiFS-retrieved aerosol optical properties, J. Atmos. Sci., 59, 748–757, 2002.; Bryant, C., Eleftheriadis, K., Smolik, J., Zdimal, V., Mihalopoulos, N., and Colbeck, I.: Optical properties of aerosols over the eastern Mediterranean, Atmospheric Environment, 40(32), 6229–6244, 2006.; Christopher, S. A. and Zhang, J.: Shortwave aerosol radiative forcing from MODIS and CERES observations over the oceans, Geophys. Res. Lett., 29, 1859, doi:10.1029/2002GL014803, 2002.; Chu, D. A., Kaufman, Y. J., Zibordi, G., Chern, J. D., Mao, J., Li, C., and Holben, B. N.: Global monitoring of air pollution over land from the Earth Observing System-Terra Moderate Resolution Imaging Spectroradiometer (MODIS), J. Geophys. Res., 108, 4661, doi:10.1029/2002JD003179, 2003.; Draxler, R. R. and Hess, G. D.: An overview of the HYSPLIT{_}4 modelling system for trajectories, dispersion and deposition, Aust. Meteorol. Mag., 47, 295–308, 1998.; Dubovik, O. and King, M. D.: A flexible inversion algorithm for retrieval of aerosol optical properties from Sun and sky radiance measurements, J. Geophys. Res., 105, 20673–20696, doi:10.1029/2000JD900282, 2000.; Dubovik, O., Smirnov, A., Holben, B. N., King, M. D., Kaufman, Y. J., Eck, T. F., and Slutsker, I.: Accuracy assessments of aerosol optical properties retrieved from Aerosol Robotic Network (AERONET) Sun and sky radiance measurements, J. Geophys. Res., 105, 9791–9806, doi:10.1029/2000JD900040, 2000.; Formenti, P., Andreae, M. O., Andreae, T. W., Galani, E., Vasaras, A., Zerefos, C., Amiridis, V., Orlovsky, L., Karnieli, A., Wendisch, M., Wex, H., Holben, B. N., Maenhaut, W., and Lelieveld, J.: Aerosol optical properties and large-scale transport of air masses: Observations at a coastal and a semiarid site in the eastern Mediterranean during summer 1998, J. Geophys. Res., 106, 9807–9826, doi:10.1029/2000JD900609, 2001.; Forster, P., Ramaswamy, V., Artaxo, P., Berntsen, T., Betts, R., Fahey, D. W., Haywood, J., Lean, J., Lowe, D.C., Myhre, G., Nganga, J., Prinn, R., Raga, G., Schulz, M., and Van Dorland, R.: Changes in Atmospheric Constituents and in Radiative Forcing, in: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 2007.; Fotiadi, A., Hatzianastassiou, N., Drakakis, E., Matsoukas, C., Pavlakis, K. G., Hatzidimitriou, D., Gerasopoulos, E., Mihalopoulos, N., and Vardavas, I.: Aerosol physical and optical properties in the Eastern Mediterranean Basin, Crete, from Aerosol Robotic Network data, Atmos. Chem. Phys., 6, 5399–5413, doi:10.5194/acp-6-5399-2006, 2006.; Gueymard, C.: The Sun's total and spectral irradiance for solar energy applications and solar radiation models, Solar Energy, 76(4), 423–453, 2004.; Hartman, D. L.: Global Physical Climatology, Academic Press, 411 pp., 1994.; Hatzianastassiou, N. and Vardavas, I.: Shortwave radiation budget of

 

Click To View

Additional Books


  • Thermal Stability Analysis of Particles ... (by )
  • Night-time Enhanced Atmospheric Ion Conc... (by )
  • A Climatological Perspective of Deep Con... (by )
  • Particulate Matter, Air Quality and Clim... (by )
  • Utilising Shade to Optimize Uv Exposure ... (by )
  • Long-term Behavior of the Concentration ... (by )
  • Carbonaceous Components, Levoglucosan an... (by )
  • Global Lightning NoX Production Estimate... (by )
  • Observational Study of Aerosol Hygroscop... (by )
  • Objective Assessment of Ozone in Chemist... (by )
  • Regional Pollution Potentials of Megacit... (by )
  • Primary and Secondary Organic Carbon Dow... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.