This paper summarizes the 37 year history of net accumulation measurements at the geographic South Pole obtained by numerous investigators using a variety of techniques. These data lead to the conclusion that annual net snow accumulation has increased in the vicinity of South Pole Station (SPS) since 1955. The records were examined for evidence of a “station effect” and it is concluded that not all of the observed increase can be attributed to snow drift associated with the presence of the station. Furthermore, the accumulation increase at the South Pole appears consistent with increases observed at other locations on the East Antarctic Plateau, and in the Peninsula region as well. These data suggest that the recent accumulation increase at SPS may be regionally extensive over the East Antarctic Plateau.

This paper summarizes the 37 year history of net accumulation measurements at the geographic South Pole obtained by numerous investigators using a variety of techniques. These data lead to the conclusion that annual net snow accumulation has increased in the vicinity of South Pole Station (SPS) since 1955. The records were examined for evidence of a “station effect” and it is concluded that not all of the observed increase can be attributed to snow drift associated with the presence of the station. Furthermore, the accumulation increase at the South Pole appears consistent with increases observed at other locations on the East Antarctic Plateau, and in the Peninsula region as well. These data suggest that the recent accumulation increase at SPS may be regionally extensive over the East Antarctic Plateau.

No abstract

Objectives. To examine rates of sexually transmitted infections as a function of jail and prison incarceration rates across US counties for the years 2011 to 2016. Methods. We used data from several national databases. The outcomes were county-level chlamydia and gonorrhea incidence as reported by the Centers for Disease Control and Prevention (2012–2016). The exposures were lagged specifications of county-level jail and prison incarceration rates as reported by the Vera Institute of Justice (2011–2015). We estimated mixed models to account for the 3 sources of response variable variation occurring across repeated measures collected from counties nested within states. Results. In the final model, jail and prison incarceration rates were associated with a rate increase of 10.13 per 100 000 and 8.22 per 100 000, respectively, of chlamydia incidence. The corresponding rate increases for gonorrhea incidence were 2.47 per 100 000 and 4.40 per 100 000. Conclusions. These findings provide some evidence that the documented differences in chlamydia and gonorrhea incidence between counties may be partially attributable to differences in jail and prison incarceration rates.