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Volume 7 Number 24:  16 June 2004

Temperature Record of the Week
This issue's Temperature Record of the week is from Dahlonega, Georgia. Visit our U.S. Climate Data section to plot and view these data for yourself.

Editorial
The World's Oceans Possess Not One CLAW, But Two: A negative climate feedback phenomenon that tends to keep sea surface temperatures from rising too high over nutrient-rich portions of the world's oceans has now been joined by a companion phenomenon that accomplishes the same task over the world's nutrient-poor marine waters.

Subject Index Summaries
Droughts (North America: Mexico): Multi-century reconstructions of past precipitation in northern Mexico fail to reveal anything unusual about this aspect of climate in the 20th century, in contradiction of what climate alarmists say should be a near-certain consequence of the rising temperatures of that time period.

Seeds (Crops): Atmospheric CO2 enrichment promotes several processes that combine to increase crop seed yields and enhance a number of important seed properties.

Journal Reviews
Antarctic Sea Ice (1979-2002): In the virtual world of climate alarmism, CO2-induced global warming is predicted to be most evident in earth's polar regions.  Consequently, if the planet has truly experienced "unprecedented" global warming over the past quarter-century, as climate alarmists also claim, one would expect that the sea ice surrounding Antarctica would be rapidly disappearing.  Is it?

The Medieval Warm Period in Tierra del Fuego: At the southern tip of South America, about as far south as one can go from the lands surrounding the North Atlantic Ocean and still remain on a habitable continent, new evidence for the Medieval Warm Period -- claimed by climate alarmists to be a unique feature of high northern latitudes -- makes its debut.

Response of Silver Birch Trees to Elevated CO2 and Ozone: High ozone concentrations often reduce the productivity of crops and natural vegetation.  Can enriching the air with CO2 help to mitigate this situation?

Dark Respiration of Leaves and Needles: How Is It Influenced by Elevated CO2?: This question has been fraught with controversy ever since it was asked.  A new study now appears to provide a definitive answer.

The Photosynthetic Response of Poplar Trees to CO2 Enrichment from the Seedling Stage to Maturity: A unique experiment that measured the photosynthetic response of a plantation of poplar trees from planting to harvest reveals the great potential for mature closed-canopy forests to positively respond to the ongoing rise of the air's CO2 content.