Comment on “Low time resolution analysis of polar ice cores cannot detect impulsive nitrate events” by D.F. Smart et al.

Smart et al. (2014) suggested that the detection of nitrate spikes in polar ice cores from solar energetic particle (SEP) events could be achieved if an analytical system with sufficiently high resolution was used. Here we show that the spikes they associate with SEP events are not reliably recorded in cores from the same location, even when the resolution is clearly adequate. We explain the processes that limit the effective resolution of ice cores. Liquid conductivity data suggest that the observed spikes are associated with sodium or another nonacidic cation, making it likely that they result from deposition of sea salt or similar aerosol that has scavenged nitrate, rather than from a primary input of nitrate in the troposphere. We consider that there is no evidence at present to support the identification of any spikes in nitrate as representing SEP events. Although such events undoubtedly create nitrate in the atmosphere, we see no plausible route to using nitrate spikes to document the statistics of such events.

Protecting user privacy in the Cloud: an analysis of terms of service

We present the results of a study that collected, compared and analyzed the terms and conditions of a number of cloud services vis-a-vis privacy and data protection. First, we assembled a list of factors that comprehensively capture cloud companies' treatment of user data with regard to privacy and data protection; then, we assessed how various cloud services of different types protect their users in the collection, retention, and use of their data, as well as in the disclosure to law enforcement authorities. This commentary provides comparative and aggregate analysis of the results.

Vendor payments for medical care under public assistance, by program and type of service : fiscal years 1951-1970.

Cover title.

Hagadah ve-seder shel Pesaḥ = Form of service for the two first nights of the feast of Passover, with English translation.

In double columns; English and Hebrew in opposite columns.

Biological effects of a nuclear attack : presented at the Hearings on the Biological and Environmental Effects of Nuclear War, before the Special Subcommittee on Radiation, Joint Committee on Atomic Energy /

"Radiation Effects of Weapons Branch, AEC."

The History of the Administrative Office of the United States Courts : sixty years of service to the federal judiciary /

"January 2000."

Effects of hours of service regularity of schedules, and cargo loading on truck and bus driver fatigue. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Basic research in crashworthiness II - low speed impact tests of unmodified vehicles. Interim technical report.

National Highway Traffic Safety Administration, Washington, D.C.

Basic research in crashworthiness II - low speed impact tests of modified vehicles. Interim technical report.

National Highway Traffic Safety Administration, Washington, D.C.

Full circle : ninety years of service in the Main Reading Room /

Includes bibliographical references (p. 61-64).

1987 census of service industries.

"Issued April-November 1990."

1992 census of service industries.

"Issued February 1995."

Energy Policy Act transportation rate study : availability of data and studies.

"DOE/EIA-0571."

Presbyterian forms of service /

Mode of access: Internet.