In summertime, eastern China experiences severe ozone pollution. Stratosphere-to-troposphere transport (STT), as the primary natural source of tropospheric ozone, may have a non-negligible contribution to ground-level ozone. Rossby wave breaking (RWB) is leading mechanism that triggers STT, which can be categorized anticyclonic breakings (AWBs) and cyclonic (CWBs). This study uses an objective ...

Exposure and flux-based indices of O3 risk were compared, at 19 forest locations across Bavaria in southern Germany from 2002 to 2005; leaf symptoms on mature beech trees found at these locations were also examined for O3 injury. O3 flux modelling was performed using continuously recorded O3 concentrations in combination with meteorological and soil moisture data collected from Level II forest ...

The paper summarizes research for generating explanations from environmental models. We make use of the corresponding representation of the environmental models as constraint satisfaction problems. We show how this representation can be used directly to derive explanations. During the whole paper we use a coarse model which represents the relationship between the ground-level ozone concentratio...

The assessment of air pollution regulatory programs designed to improve ground level ozone concentrations is a topic of considerable interest to environmental managers. To aid this assessment, it is necessary to model the space-time behavior of ozone for predicting summaries of ozone across spatial domains of interest and for the detection of long-term trends at monitoring sites. These trends, ...

RATIONALE Exposure to ozone causes a decrease in spirometric lung function and an increase in airway inflammation in healthy young adults at concentrations as low as 0.08 ppm, close to the National Ambient Air Quality Standard for ground level ozone. OBJECTIVES To test whether airway effects occur below the current ozone standard and if they are more pronounced in potentially susceptible indi...

Models severely overestimate surface ozone in the Southeast US during summertime and this overestimation has implications for the design of air quality regulations. We use the GEOS-Chem model to interpret ozone observations from aircraft (SEACRS), ozonesondes (SEACIONS), and surface sites (CASTNET) in August-September 2013. After correcting for a 30-50 % NOx emission overestimate in the US EPA ...

the main driving force of the earth atmospheric system is solar radiation. radiation flux determines the surface temperature and impacts life on the earth through photosynthesis. a quantitative knowledge of the earth radiation field is important to evaluate the atmosphere–surface interactions and the global hydrological cycle. various atmospheric radiative transfer models have been proposed in ...

In order to calculate the OH primary production rate from satellite measurements, one has to estimate the following quantities: profile of the photodissociation rate of ozone to O(D), tropospheric ozone profile and tropospheric water vapour profile. The estimation of tropospheric OH primary production rate from ERS-2 data is demonstrated. The tropospheric ozone profiles retrieved at the Rutherf...

Ozone concentrations in the Mediterranean area regularly exceed the maximum levels set by the EU Air Quality Directive, 2008/50/CE, a maximum 8-h mean of 120 μg·m−3, in the summer, with consequences for both human health and agriculture. There are a number of reasons for this: the particular geographical and meteorological conditions in the Mediterranean play a part, as do anthropogenic ozone p...