Warm Cloud Evolution, Precipitation, and Their Weak Linkage in HadGEM3: New Process-Level Diagnostics using A-Train Observations

The latest configuration of the Hadley Centre Global Environmental Model version 3 (HadGEM3) contains significant changes in the formulation of warm rain processes and aerosols. We evaluate the impacts of these changes in the simulation of warm rain formation processes using A-Train observations. We introduce a new model evaluation tool, quartile-based Contoured Frequency by Optical Depth Diagrams (CFODDs), in order to fill in some blind spots that conventional CFODDs have. Results indicate that HadGEM3 has weak linkage between the size of particle radius and warm rain formation processes, and switching to the new warm rain microphysics scheme causes more difference in warm rain formation processes than switching to the new aerosol scheme through reducing overly produced drizzle mode in HadGEM3. Finally, we run an experiment in which we perturb the second aerosol indirect effect (AIE) to study the rainfall-aerosol interaction in HadGEM3. Since the large changes in the cloud droplet number concentration (CDNC) appear in the AIE experiment, a large impact in warm rain diagnostics is expected. However, regions with large fractional changes in CDNC show a muted change in precipitation, arguably because large-scale constraints act to reduce the impact of such a big change in CDNC. The adjustment in cloud liquid water path to the AIE perturbation produces a large negative shortwave forcing in the midlatitudes.

Public Debt and Sustainable National Development in Nigeria: Analysis of Fundamental Issues

This study raises some fundamental issues in the relationship between public debt and sustainable national development in Nigeria. The work is significant in highlighting the position of public debt in the subject area of public administration. The study finds a very weak linkage between public debt and sustainable national development in the Nigerian state. The theoretical framework of the investigation is the bureaucratic theory. The work finds that the bureaucracy is as guilty as the politician in the country, in the transmutation of public debt into a brand of national bazaar. It is finally recommended in the paper that taxation-increases be adopted as alternative to public debt, in ensuring that the current generation of the country’s citizens, in meeting their immediate needs do not invariably endanger the capacity of future generations in the same regards.