1 / 16

"Can MODIS derive anthropogenic aerosol?" Kaufman, Boucher, Tanré, Chin, Remer, Takemura

"Can MODIS derive anthropogenic aerosol?" Kaufman, Boucher, Tanré, Chin, Remer, Takemura. Can MODIS derive anthropogenic aerosol?. • How? • Are the data adequate? • Application to 2 yrs of data • Implications to models and IPCC. MODIS: Saharan dust, Jan. 2002. How?

lora
Download Presentation

"Can MODIS derive anthropogenic aerosol?" Kaufman, Boucher, Tanré, Chin, Remer, Takemura

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. "Can MODIS derive anthropogenic aerosol?" • Kaufman, Boucher, Tanré, Chin, Remer, Takemura

  2. Can MODIS derive anthropogenic aerosol? • How? • Are the data adequate? • Application to 2 yrs of data • Implications to models and IPCC

  3. MODIS: Saharan dust, Jan. 2002 • How? • MODIS distinguishes fine from coarse aerosol particles over the oceans Visible Mid IR Fires in Australia, Dec 2001 Visible Mid IR Kaufman, Tanré, Boucher, Nature 2002

  4. fpollution fdust fmarine mar anth=[(ftot - fdust)tot - (fmar - fdust)mar]/(fanth-fdust) ; ff=anth /total

  5. Rich Kleidman: validation of MODIS fine fraction Aeronet almucantar fine fraction

  6. Application to 2 years of MODIS data?

  7. Comparison of MODIS AOT to MODELS

  8. --> hypothesis: Satellites and models have larger problems with natural (mainly coarse aerosol) than with anthropogenic (mainly fine)

  9. MODIS 0.033 GOCART 0.030 LMDZ 0.032 SPRINTAS 0.036

  10. Conclusions: • Satellites - MODIS agree BETTER with models regarding the anthropogenic AOT than total AOT • Application to 2 years of global MODIS data shows that 0.21±0.06 of the aerosol optical thickness has anthropogenic origin. • Good agreements with the MODELs average anthropogenic AOT increases the confidence in their assessment of direct aerosol forcing of climate at the TOA. • Measured direct forcing in clouds free is -1.3±0.4 W/m2.

More Related