Daily Archives: January 27, 2012

Ocean heat content: model predictions vs measurements

Click here for a thorough discussion of ocean heat content. How much data is needed to decide a model has failed?  Looks to me like enough in this case…..

Climate Scientists: CO2 is not a pollutant, no need to decarbonize

“Speaking for many scientists and engineers who have looked carefully and independently at the science of climate, we have a message to any candidate for public office: There is no compelling scientific argument for drastic action to “decarbonize” the world’s economy. Even if one accepts the inflated climate forecasts of the IPCC, aggressive greenhouse-gas control policies are not justified economically.”

Click here for the text of a statement signed by 16 scientists. I agree with this statement.

Zeman et al 2011: New questions and insights into nitrate/nitrite and human health effects: a retrospective cohort study of private well users’ immunological and wellness status

Zeman, C., L. Beltz, M. Linda, J. Maddux, D. Depken, J. Orr, and P. Theran. New questions and insights into nitrate/nitrite and human health effects: a retrospective cohort study of private well users’ immunological and wellness status. J Environ Health. 2011 Nov;74(4):8-18.

Environmental Health, University of Northern Iowa, Health Division, Cedar Falls, IA 50614-0241, USA. catherine.zeman@uni.edu

The retrospective cohort study described in this article examined 150 Iowa private well users’ (aged 1-60 years) drinking water below the 10 parts per million nitrate-nitrogen (nitrate-N) maximum contaminant level and analyzed health history data and blood samples including hemoglobin fractions and immunological parameters. Positive associations existed (bivariate fit) between higher nitrate exposure and body mass index, lower recreational activity, perceived poorer health, and perceptions of susceptibility to illness. A directly proportionate relationship was seen between methemoglobin level in the blood and nitrate ingestion. High tumor necrosis factor-beta (TNF-beta) expression was also seen (bivariate fit, f = 3.76, p = .05). Complaints of stomach/ intestinal difficulties (heartburn/reflux > 50%; f = 5.274, p = .0231) and bone, muscle, and nerve complaints (osteoarthritis [rheumatoid excluded] = 47%; f = 6.0533, p = .0150) were found with increasing nitrate exposure. In vivo exposures of nitrate-N associated with complaints of bone/joint disorders or with altered ex vivo production of TNF-beta or Th2/Treg cytokine interleukin-10 have not been previously illustrated with environmental exposures.