NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 1 of 52291
MODIS Aerosol Observations used to Constrain Dust Distributions and Lifecycle in the NASA GEOS-5 Model
Author and Affiliation:
Colarco, P.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Nowottnick, E.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
daSilva, A.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Approximately 240 Tg of mineral dust aerosol are transported annually from Saharan Africa to the Atlantic Ocean. Dust affects the Earth radiation budget, and plays direct (through scattering and absorption of radiation) and indirect (through modification of cloud properties and environment) roles in climate. Deposition of dust to the surface provides an important nutrient source to terrestrial and oceanic ecosystems. Dust is additionally a contributor to adverse air quality. Among the tools toward understanding the lifecycle and impacts of mineral dust aerosols are numerical models. Important constraints on these models come from quantitative satellite observations, like those from the space-based Moderate Resolution Imaging Spectroradiometer (MODIS). In particular, Kauhan et al. [2005] used MODIS aerosol observations to infer transport and deposition fluxes of Saharan dust over the Atlantic, Caribbean, and Amazonian basins. Those observations are used here to constrain the transport of dust and its interannual variability simulated in the NASA GEOS-5 general circulation model and data assimilation system. Significant uncertainty exists in the MODIS-derived fluxes, however, due to uncertainty in the wind fields provided by meteorological analyses in this region. That same uncertainty in the wind fields is manifest in our GEOS-5 simulations of dust distributions. Here we use MODIS observations to investigate the seasonality and location of the Saharan dust plume and explore through sensitivity analysis of our model the meteorological controls on the dust distribution, including dust direct radiative effects and sub-gridscale source and sink processes.
Publication Date: Jan 01, 2007
Document ID:
20070016594
(Acquired May 02, 2007)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Conference Paper
Meeting Information: AMS Meeting; 17 Jan. 2007; San Antonio, TX; United States
Meeting Sponsor: American Meteorological Society; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: AEROSOLS; DUST; MODIS (RADIOMETRY); NASA PROGRAMS; GEOS SATELLITES (ESA); ATMOSPHERIC GENERAL CIRCULATION MODELS; SENSITIVITY ANALYSIS; AIR QUALITY; ATLANTIC OCEAN; CARIBBEAN REGION; SAHARA DESERT (AFRICA)
Availability Source: Other Sources
Availability Notes: Abstract Only
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 23, 2011
Contact Us