The current knowledge regarding the effect of global climate change on rice-paddy methane (CH4) emissions is incomplete, partly because information is limited concerning the mechanism of the microbial response to elevated ground-level ozone (O3). A field experiment was conducted in the China Ozone Free-Air Concentration Enrichment facility in a rice-wheat rotation system to investigate the resp...

In order to explore the temporal-spatial patterns and possible health effects of ozone in Shenzhen, daily concentrations of ozone and the daily mortality caused by cardiovascular and respiratory diseases were collected. Using Geographic Information System (GIS) and SPSS, the spatial and temporal patterns of ozone in Shenzhen were illustrated. Using a generalized additive model (GAM), the associ...

Ozone profiles obtained by near-daily ozonesonde observations during campaigns at several sites in the North Atlantic are used to construct time-height cross sections of ozone concentration through the troposphere. Strong day-to-day ozone variability on the scale of synoptic meteorological disturbances is found both in the spring and in the summer throughout much of the troposphere. Layers of h...

Model projections suggest that although increased temperature and decreased soil moisture will act to reduce global crop yields by 2050, the direct fertilization effect of rising carbon dioxide concentration ([CO2]) will offset these losses. The CO2 fertilization factors used in models to project future yields were derived from enclosure studies conducted approximately 20 years ago. Free-air co...

Oceanic iron (Fe) fertilization experiments have advanced the understanding of how Fe regulates biological productivity and air-sea carbon dioxide (CO(2)) exchange. However, little is known about the production and consumption of halocarbons and other gases as a result of Fe addition. Besides metabolizing inorganic carbon, marine microorganisms produce and consume many other trace gases. Severa...

Measurement of ozone in the urban environment of Hyderabad was carried out synoptically at four different locations during the year 2011. The amount of ozone in the ambient air varied from 20 μg/m3 to 273 μg/m3 exhibiting wide temporal and seasonal variation. The ozone concentration is invariably peak at noon time and remained high during early summer and spring period. On many occasions 1-h oz...

1. Tropospheric ozone (O 3 ) and carbon dioxide (CO 2 ) are significant drivers of plant growth and chemical composition. We hypothesized that exposure to elevated concentrations of O 3 and CO 2 , singly and in combination, would modify the chemical composition of Trifolium and thus alter its digestibility and nutritive quality for ruminant herbivores. 2. We tested our hypothesis by collecting ...

Surface ozone pollution has been a persistent environmental problem in the US and Europe as well as the developing countries. A key prerequisite to find effective alternatives to meeting an ozone air quality standard is to understand the importance of local anthropogenic emissions, the significance of biogenic emissions, and the contribution of long-range transport. In this study, an air qualit...

This study compares the fading of inkjet prints tested in environmental chambers using either an electrostatic discharge or ultraviolet radiation to produce ozone. Our results indicate that over the range of 0.1 to 5.0 ppm ozone in air, very similar fading characteristics are obtained at 50% RH with the microporous and swellable polymer based inkjet papers tested, whether ozone is produced with...

in the present study, air quality analyses for ozone (o3) were conducted in shiraz, a city in the south of iran. the measurements were taken from 2011 through 2012 in two different locations to prepare average data in the city. the average concentrations were calculated for every 24 hours, each month and each season. results showed that the highest concentration of ozone occurs generally in the...