Aerosol optical depth and direct radiative forcing for INDOEX derived from AVHRR: Observations, January–March 1996–2000 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/t435gf694

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Visible and near infrared reflectances from NOAA-14 Advanced Very High Resolution Radiometer (AVHRR) daytime passes are used to derive optical depths at 0.55 μm, an index of aerosol type, continental or marine, and the direct effect of the aerosol on the top of the atmosphere and surface solar radiative fluxes for the oceans in the Indian Ocean Experiment (INDOEX) region (30ºS to 30ºN and 50º–110ºE) during the January–March 1996–2000 winter monsoons. Comparison of aerosol optical depth and radiative forcing in the Northern Hemisphere with those in the Southern Hemisphere suggests that the additional pollution sources augment the 0.55-μm optical depth by, on average, 0.1 in the Northern Hemisphere. As a result of the aerosol, the region of the Indian Ocean in the Northern Hemisphere loses about 1.6 Wm_2 in reflected sunlight and the ocean surface loses about 5 Wm_2 during the months of the winter monsoon. Aerosol burdens and the aerosol direct radiative forcing are a relatively constant feature of the Northern Hemisphere, although the southeastern Arabian Sea experienced considerably larger aerosol burdens during the February–March 1999 INDOEX Intensive Field Phase (IFP) than in other years. Frequency distributions of the optical depth for 1º x 1º latitude-longitude regions are well represented by gamma distribution functions. The day-to-day and year-to-year variability of the optical depth for such regions is correlated with the long-term average optical depth. Interannual variability of the monthly mean optical depths for such regions is found to be as large as the day-to-day variability. Such large variability suggests that long-term records of in situ observations will be required in order to assess the performance of models that generate climatologies of aerosol concentrations.
Resource Type
Date Available
Date Issued
Citation
  • Tahnk, W. R. and Coakley, J. A., Jr., 2002, Aerosol optical depths and direct radiative forcing for INDOEX Derived from AVHRR: Observations, January – March, 1996 – 2000: J. Geophys. Res., v. 107, INX2, 9, p. 1-19.
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2010-03-29T23:08:16Z (GMT). No. of bitstreams: 1 Tahnk and Coakley 2002.pdf: 1530152 bytes, checksum: 0d9d9fabdc0fc9fa0b380573499b2851 (MD5) Previous issue date: 2002
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-03-25T23:35:42Z No. of bitstreams: 1 Tahnk and Coakley 2002.pdf: 1530152 bytes, checksum: 0d9d9fabdc0fc9fa0b380573499b2851 (MD5)
  • description.provenance : Approved for entry into archive by Linda Lamb(llamb@coas.oregonstate.edu) on 2010-03-29T23:08:16Z (GMT) No. of bitstreams: 1 Tahnk and Coakley 2002.pdf: 1530152 bytes, checksum: 0d9d9fabdc0fc9fa0b380573499b2851 (MD5)
ISSN
  • 0148-0227

Relationships

In Administrative Set:
Last modified: 07/21/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items