Droughts over Pakistan: possible cycles, precursors and associated mechanisms

Pan-Continental Droughts in North America over the Last Millennium*

Regional droughts are common in North America, but pan-continental droughts extending across multiple regions, including the 2012 event, are rare relative to single-region events. Here, the tree-ring-derived North American Drought Atlas is used to investigate drought variability in four regions over the last millennium, focusing on pan-continental droughts. During the Medieval Climate Anomaly (...

Modelling droughts and ENSO cycles in the Murray-Darling basin with a regional climate model

The climate of the Murray-Darling Basin (MDB) has been simulated using the Weather Research and Forecasting (WRF) model. WRF was implemented using a 10km horizontal grid and integrated for 24 years from 1985 through 2008. The model simulated climate was evaluated against gridded precipitation and temperature observations from the Australian Water Availability Project (AWAP) and found to perform...

Epidemiology and possible mechanisms

Background. Many early epidemiologic studies reported an association between periodontal disease and cardiovascular disease. However, other studies found no association or nonsignificant trends. This report summarizes the evidence from epidemiologic studies and studies that focused on potential contributing mechanisms to provide a more complete picture of the association between periodontal and...

The Possible Precursors of z = 0 Cluster

We examine the distribution of stellar masses of galaxies in MS 1054.4-0321 and CL 0152.7-1357, two X-ray-selected clusters of galaxies at z = 0.83. Our stellar mass estimates, from spectral energy distribution fitting, reproduce the dynamical masses as measured from velocity dispersions and halflight radii with a scatter of 0.2 dex in the mass for early-type galaxies. When we restrict our samp...

Winter Counts as Possible Precursors to Writing