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Title: |
Recent Short Term Global Aerosol Trends over Land and Ocean Dominated by Biomass Burning
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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
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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.
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NASA Center: |
Goddard Space Flight Center
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Publication Date: |
[2007]
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Document Source: |
CASI |
No Digital Version Available: |
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Document ID: |
20080046909
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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;
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Accessibility: |
Unclassified; Copyright; Unlimited; Publicly available; |
Updated/Added to NTRS: |
2008-12-17 |
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