+ Visit NASA.gov + Contact NASA   + Home Collection > NASA  Author > Kim, Kyu-Myong  Author > Kleidman, RIchard G.  Author > Koren, Ilan  Author > Levy, Robert C.  Author > Martins, J. Vanderlei  Author > Mattoo, Shana  Author > Remer, Lorraine A.  Author > Tanre, Didier  Author > Yu, Hongbin  NASA Center > Goddard Space Flight Center  Publication Year > 2001-2010 > 2007  Subject > G-I > Geophysics  Availability Options > Order From CASI > CD-ROM, DVD, Print  Item/Media Type > Preprint  Note: Start a new navigation search by selecting a link above     Previous Record | Next Record + Back to Results   + Printer Friendly Title: Recent Short Term Global Aerosol Trends over Land and Ocean Dominated by Biomass Burning Author(s): Remer, Lorraine A.; Koren, Ilan; Kleidman, RIchard G.; Levy, Robert C.; Martins, J. Vanderlei; Kim, Kyu-Myong; Tanre, Didier; Mattoo, Shana; Yu, Hongbin Abstract: NASA's MODIS instrument on board the Terra satellite is one of the premier tools to assess aerosol over land and ocean because of its high quality calibration and consistency. We analyze Terra-MODIS's seven year record of aerosol optical depth (AOD) observations to determine whether global aerosol has increased or decreased during this period. This record shows that AOD has decreased over land and increased over ocean. Only the ocean trend is statistically significant and corresponds to an increase in AOD of 0.009, or a 15% increase from background conditions. The strongest increasing trends occur over regions and seasons noted for strong biomass burning. This suggests that biomass burning aerosol dominates the increasing trend over oceans and mitigates the otherwise mostly negative trend over the continents. NASA Center: Goddard Space Flight Center Publication Date: [2007] Document Source: CASI No Digital Version Available: Go to Tips On Ordering Document ID: 20080046909 Publication Information: Number of Pages = 17 Price Code: A03 Related Information: To appear in Science Journal Keywords: MODIS (RADIOMETRY); AEROSOLS; BIOMASS BURNING; IMAGING SPECTROMETERS; CALIBRATING; TRENDS; SEASONS; OCEANS; OPTICAL THICKNESS; Accessibility: Unclassified; Copyright; Unlimited; Publicly available; Updated/Added to NTRS: 2008-12-17 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007