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Climate
Response of terrestrial ecosystems to recent Northern Hemispheric drought
Article first published online: 19 MAR 2005
DOI: 10.1029/2004GL022043
Copyright 2005 by the American Geophysical Union.
Additional Information
How to Cite
, , , and (2005), Response of terrestrial ecosystems to recent Northern Hemispheric drought, Geophys. Res. Lett., 32, L06705, doi:10.1029/2004GL022043.
Publication History
- Issue published online: 19 MAR 2005
- Article first published online: 19 MAR 2005
- Manuscript Accepted: 11 FEB 2005
- Manuscript Revised: 17 JAN 2005
- Manuscript Received: 19 NOV 2004
- Abstract
- Article
- References
- Cited By
[1] Satellite normalized difference vegetation index (NDVI) observations reveal large and geographically extensive decreases in vegetation activity in Eurasia and North America between 1999 and 2002. In 2001, 73% of central southwest Asia exhibited NDVI anomalies that were more than one standard deviation below 21-year average conditions, and in 2002, fully 95% of North America exhibited below-average NDVI. This episode of large-scale vegetation browning coincided with a prolonged period of below-normal precipitation in the Northern Hemisphere, which limited moisture availability for plant growth. Spatio-temporal dynamics of NDVI, precipitation, and sea surface temperature data reveal that synchronous patterns of ocean circulation anomalies in the Pacific, Atlantic, and Indo-Pacific are strongly correlated with observed joint variability in NDVI and precipitation in the Northern Hemisphere during this period.