The Economic impact of ME/CFS: Individual and societal costs (open access)

The Economic impact of ME/CFS: Individual and societal costs

This article discusses the economic impact of Myalgic Encephalopathy and Chronic Fatigue Syndrome by examining the direct and indirect costs to the individual and to society.
Date: April 8, 2008
Creator: Jason, Leonard A.; Benton, Mary C.; Valentine, Lisa M.; Johnson, Abra & Torres-Harding, Susan
System: The UNT Digital Library
Sea Water Radiocarbon Evolution in the Gulf of Alaska: 2002 Observations (open access)

Sea Water Radiocarbon Evolution in the Gulf of Alaska: 2002 Observations

Oceanic uptake and transport of bomb radiocarbon as {sup 14}CO{sub 2} created by atmospheric nuclear weapons testing in the 1950s and 1960s has been a useful diagnostic to determine the carbon transfer between the ocean and atmosphere. In addition, the distribution of radiocarbon in the ocean can be used as a tracer of oceanic circulation. Results obtained from samples collected in the Gulf of Alaska in the summer of 2002 provide a direct comparison with results in the 1970s during GEOSECS and in the early 1990s during WOCE. The open gyre values are 20-40{per_thousand} more negative than those documented in 1991 and 1993 (WOCE) although the general trends as a function of latitude are reproduced. Surface values are still significantly higher than pre-bomb levels ({approx}-105{per_thousand} or lower). In the central gyre, we observe {Delta}{sup 14}C-values that are lower in comparison to GEOSECS (stn 218) and WOCE P16/P17 to a density of {approx}26.8{sigma}t. This observation is consistent with the overall decrease in surface {Delta}{sup 14}C values, and reflects the erosion of the bomb-{sup 14}C transient. We propose that erosion of the bomb-{sup 14}C transient is accomplished by entrainment of low {sup 14}C water via vertical exchange within the Gulf of Alaska …
Date: April 8, 2005
Creator: Guilderson, T. P.; Roark, E. B.; Quay, P. D.; Flood-Page, S. R. & Moy, C.
System: The UNT Digital Library