Global Atmospheric δ13CH4 and CH4 Trends for 2000–2020 from the Atmospheric Transport Model TM5 Using CH4 from Carbon Tracker Europe–CH4 Inversions

This study investigates atmospheric (Formula presented.) CH (Formula presented.) trends, as produced by a global atmospheric transport model using CH (Formula presented.) inversions from CarbonTracker-Europe CH (Formula presented.) for 2000-2020, and compares them to observations. The CH (Formula presented.) inversions include the grouping of...

The Role of Emission Sources and Atmospheric Sink in the Seasonal Cycle of CH4 and ?13-CH4: Analysis Based on the Atmospheric Chemistry Transport Model TM5

This study investigates the contribution of different CH4 sources to the seasonal cycle of δ13C during 2000–2012 by using the TM5 atmospheric transport model, including spatially varying information on isotopic signatures. The TM5 model is able to produce the background seasonality of δ13C, but the discrepancies compared to the observations...

Computer-based training increases efficiency in x-ray image: Interpretation by aviation security screeners

X-Ray screening of passenger bags is an essential component of airport security. Large investments into technology have been made in recent years. However, the most expensive equipment is of limited value, if th humans who operate it are not selected and trained appropriately. Scientific studies have shown that human performance in x-ray image...