Welcome to the Harvard Atmospheric Chemistry Modeling Group!

Our goal is to understand the chemical composition of the atmosphere, its perturbation by human activity, and the implications for climate change and life on Earth. Our approaches include global modeling of atmospheric chemistry and climate, aircraft measurement campaigns, satellite data retrievals, and analyses of atmospheric observations.

GROUP LEADERS: Daniel J. Jacob and Jennifer A. Logan
[head] People and alums
Group photos
 
[flags] Alumni Map
 
[happy computing] Current research projects
 
[papers] Publications
 
[microphone] Presentations
 
[papers] Group meetings
 
[Bill the Cat] Graduate Student Forum
 
[Book] Journal Club
 
[faqs] Frequently asked questions by prospective graduate students
 

The 4th GEOS-Chem Scientific and Users' Meeting
will be held from April 7-10, 2009 at Harvard University!

GROUP NEWS (updated October 2, 2008)

PICTURE OF THE MONTH!
(posted October 5, 2008)

Improved retrieval of aerosol optical depths from MODIS satellite data

Quantitative evaluation of chemical transport models (CTMs) with aerosol optical depth (AOD) products retrieved from satellite backscattered reflectances can be compromised by inconsistent assumptions of aerosol optical properties and errors in surface reflectance estimates. We developed an improved AOD retrieval algorithm for the MODIS satellite instrument using locally derived surface reflectances and CTM aerosol optical properties for the 0.47, 0.65, and 2.13 micron MODIS channels.

The above figure shows mean AODs over North America at 0.47 and 0.65 microns for the period Jul 1 - Aug 15, 2004. MODIS retrievals from this work (top panels) are compared with the newer collection 5 (C005) [Remer et al., 2006] and the older collection 4 (C004) [Remer et al., 2005] MODIS operational products. Mean AERONET AODs for the same period are shown as filled circles. For more information see Drury et al. [2008]

Please click here to see our previous pictures of the month!

Group Secretary: Brenda Mathieu(blm@as.harvard.edu)
Address:

DIRECTIONS 		Pierce Hall, 29 Oxford St.
Harvard University
Cambridge MA 02138-2901, USA

Phone (Brenda Mathieu) 1-617-496-5745
Fax: 1-617-495-4551

[Spinning Globe] GEOS-CHEM
 
[schbus sign] Educational Materials by Daniel J. Jacob
 
[papers] Seminars
 
[GEOS-CHEM] Make your own GEOS-CHEM plots!
 
[NAPS] GEOS-Chem near-real-time simulations (active!)
 
[IDS logo] GCAP
 
[aircraft logo] NASA Earth Science Subcommittee
 
[Movie Camera] Imagery and Movies
 
[directions] How to find us
 

Back to Atmospheric Sciences Home Page

Harvard University home page

This page is maintained by Bob Yantosca (bmy@io.as.harvard.edu)