Material in this section originates from the following category in our Subject Index:

Greening of the Earth (North America)

Material preceded by an asterisk (*) was posted after this subject summary was written and therefore is not included in the summary.  This material will be integrated into the summary at a later date.

Summary

* -- Real-World Increase in Air's CO2 Content Has Accelerated Growth of Natural Aspen Stands

* -- U.S. Mid-Atlantic Temperate Forest Growth Over the 20th Century

* -- Woody Plants Acting as Carbon and Nitrogen Magnets

* -- The Response of Tundra Vegetation to High Arctic Warming

* -- Forest Growth Has Accelerated as the Air's CO2 Content Has Risen

* -- Two Decades of Northern Hemispheric Greening

* -- Real-World CO2-Induced Growth Enhancements of Oak and Pine Trees in Missouri, USA

Has the Historical Rise in the Air's CO2 Content Stimulated Tree Growth Over the Past Century?

The Pan-Arctic Shrub Expansion

Real-World Growth Response of Ponderosa Pines to Post-1950 Atmospheric CO2 Enrichment

Responses of U.S. Ecosystems to Changing Climate

North American Boreal Productivity Trends: 1982-2003

Earth Surface Reflectance Data and the Aerial Fertilization Effect of CO2

Fifteen Years of Loblolly Pine Growth Across the Southeastern United States

Increasing Export of Alkalinity by the Mississippi River: Evidence of Ever-Increasing Terrestrial Productivity

Net Primary Productivity of North America's Vegetation Rises Substantially from 1982 to 1998

The Effects of Temperature and CO2 Trends on the 1981-1999 Greening of North America and Eurasia