On how a turbulent system replicates itself at smaller scales. Marta Antonelli 1, Andrea Mazzino 2, Umberto Rizza 2(1) Univ. di Genova, D.to di Fis., (2) CNR-ISAC, Sez. di Lecce One of the most intriguing features characterizing a turbulent system is the emergence of huge fluctuations covering a wide range of spatial and temporal scales. Although the equations ruling the dynamics of such fluctuations are fully deterministic, the probabilistic description turns out to be the most appropriate ...

NICE Measurements of atmospheric and snow nitrates and nitrites and their fluxes above the snow surface were made during two campaigns during spring 2001 at Ny-Ålesund, Svalbard as part of the EU project "The NItrogen Cycle and Effects on the oxidation of atmospheric trace species at high latitudes" (NICE). Recent findings of NOx and HONO production in snow interstitial air showed that photochemical production of NOx in snow surfaces is sufficient to alter the composition of the ...

Polynuclear Aromatic Hydrocarbons (NPAH) and environment. Nitrated polynuclear aromatic hydrocarbons (NPAH) have been recognised as belonging to long-term toxic compounds and, on the other hand, were identified in several anthropogenic emissions and among by-products of photochemical smog: Therefore, in seventies and eighties they began subject of investigation in ambient air and emission products, although any regulation limited they release in the environment. Our institute, IIA-CNR, ...

The recognition of Earth's orbital cyclicity in the geologic record and its link with periodic variation in orbital parameters (precession, obliquity, eccentricity) has been instrumental in improving our understanding of past climate changes at different time scales. To this aim, some intervals of the Cretaceous, a period of Earth's history ranging from 135 to 65,5 million years ago, are considered among the possible proxies of warm phases of the near future climate extremes. Our experience ...