Response of terrestrial ecosystems to recent Northern Hemispheric drought

Details Response of terrestrial ecosystems to recent Northern Hemispheric drought Response of terrestrial ecosystems to recent Northern Hemispheric drought

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3206705l&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 6, CiteID L06705

Physics

13

Global Change: Climate Dynamics (0429, 3309), Global Change: Land/Atmosphere Interactions (1218, 1843, 3322), Hydrology: Drought, Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610)

Scientific paper

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.

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