Surface ozone (SOZ) can be very harmful if it exceeds the threshold limit. It can accumulate over sea and can return back to the land along with the breeze. Rural and vegetation rich areas often record elevated levels of surface ozone because of the variations in Volatile Organic Compound (VOC) levels, wind velocity and direction. Similarly methane is also an important greenhouse gas and plays ...

Resonance-enhanced multiphoton ionization coupled with time-of-flight product imaging has been used to study the O2(Σg) + O(Pj) product channel in the UV photodissociation of ozone at photolysis wavelengths of 226, 230, 240, and 266 nm. For dissociation at 226 and 230 nm the O(P2) fragment is produced with a strongly bimodal velocity distribution, in keeping with the previous findings of Miller...

Model predictions are sensitive to a number of complex and often coupled input parameters. Some these parameters have wide range acceptable values from literature therefore choosing the appropriate value is non-trivial. In this paper, we use INdoor Detailed Chemical (INDCM) perform Monte Carlo analysis, in which but realistic model parameter stochastically varied over 1000 runs. The output defi...

Atmospheric ammonia concentrations were measured during fall 2001, winter, spring, and summer 2002 over natural surfaces in North Carolina where animal farms and waste storage and treatment lagoons (which are known to emit ammonia) at two heights (2 and 6m) above the surface employing an arrangement of two Thermo Environmental Instruments, Inc. Model 17C chemiluminescent nitrogen oxides (NOX)–a...

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Biogeosciences Discussions This discussion paper is/has been under review for the journal Biogeosciences (BG). Please refer to the corresponding final paper in BG if available. Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Chemical transport models (CTMs), used for...

A model of atmospheric composition and climate has been developed at the NASA Goddard Institute for Space Studies (GISS) that includes composition seamlessly from the surface to the lower mesosphere. The model is able to capture many features of the observed magnitude, distribution, and seasonal cycle of trace species. The simulation is especially realistic in the troposphere. In the stratosphe...

Abstract. Dry deposition is an important sink of tropospheric ozone that affects surface concentrations and impacts crop yields, the land carbon sink, terrestrial water cycle. pathways include plant uptake via stomata non-stomatal removal by soils, leaf surfaces, chemical reactions. Observational studies indicate exhibits substantial temporal variability not reproduced atmospheric chemistry mod...