Paleo Home Research Data Education What's New Features Paleo Perspectives Site Map Mirror Sites National Climatic Data Center, Asheville, North Carolina navigation bar
What's New on the Paleo Web Pages - 1999

What's New in 1999:
Variations in Atmospheric N2O Concentration During Abrupt Climatic Changes
J. Flückiger, et al.  Published in Science, Vol. 285.
Records covering the last glacial-interglacial transition and a fast climatic change during the last ice age show that the N2O concentration changed in parallel with fast temperature variations in the Northern Hemisphere.
Holocene Carbon-Cycle Dynamics:
Based on CO2 Trapped in Ice at Taylor Dome, Antarctica

Indermühle, A., et al.  Published March 11, Nature, Vol. 398.
A high-resolution ice-core record of atmospheric CO2 concentration over the Holocene epoch shows that the global carbon cycle has not been in steady state during the past 11,000 years.
Northern Hemisphere Temperatures During the Past Millennium:
Inferences, Uncertainties, and Limitations

M.E. Mann, R.S. Bradley, M.K. Hughes.  Published March 15, Geophysical Research Letters, Vol. 26, No. 6, p. 759.
Research results suggest that the later 20th century temperatures are anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and that 1998 was the warmest year, at moderately high levels of confidence.
A Paleo Perspective... On Global Warming
The main goal in creating this comprehensive website on Global Warming was to help educate, inform and highlight the importance of paleoclimate research; as well as to show how paleoclimate research relates to global warming and other important issues regarding climate variability and change.
asychron.gif
"2000 Years of Drought Variability in the Central United States"

Woodhouse, C. & Overpeck, J.T., Bulletin of the American Meteorological Society:
Vol. 79, No. 12, pp. 2693–2714.
Historical documents, tree rings, archaeological remains, lake sediment, and geomorphic data make it clear that the droughts of the twentieth century, including those of the 1930s and 1950s, were eclipsed several times by droughts earlier in the last 2000 years.

NOAA Home Page Contact Us
NOAA Paleoclimatology Program
10 February 2000