We report on methane (CH4) stable isotope (?13C and ?2H) measurements from landfast sea ice collected near Barrow (Utqiagvik, Alaska) Cape Evans (Antarctica) over the winter-to-spring transition. These provide novel insights into pathways of CH4 production consumption in ice. found substantial differences between two sites. Sea overlying shallow shelf was supersaturated with a clear microbial o...

In situ measurements of flow and stratification in the vicinity of the Erebus Glacier Tongue, a 12 km long floating Antarctic glacier, show the significant influence of the glacier. Three ADCPs (75, 300, and 600 kHz) were deployed close (<50 m) to the sidewall of the glacier in order to capture near-field flow distortion. Scalar (temperature and conductivity) and shear microstructure profiling ...

The Afrotropical species of Norbanus Walker, 1843 (Hymenoptera: Pteromalidae) are revised. Four previously described Afrotropical species are recognized as valid and redescribed: N. africanus Subba Rao, 1973, N. garouae (Risbec, 1956) comb. nov. (transferred from Bruchobius Ashmead), N. kitegaensis (Risbec, 1957) and N. seyrigi (Risbec, 1952) comb. nov. (from Habrocytus Thomson). In addition, t...

Open-vent volcanoes are special systems where the dynamics of sustained magmatic processes can be thoroughly investigated and new monitoring tools tested applied. However, various aspects remain puzzling at open-vent for which forecasting their behaviour an important challenge. Recent papers highlight very rapid improvements in spaceborne instruments, data acquisition techniques, treatment mode...