The Appearance of 'Climate Change' and 'Global Warming" in AMS Scientific Articles [Time Series]
Below is a plot showing the time series of the number
of articles mentioning ‘Climate Change’ and ‘Global Warming’ as well as the
total number of articles published each year by American Meteorological Society (AMS) journals. The time series was constructed by searching the appearance of
both phrases at least once in the abstracts.
The first article mentioning climate change in AMS
journals was published in October 1958 by Richard Fay from the United States
Weather Bureau. The name of the article is “Some Variations in European Climatic Temperature” and its abstract is:
“An attempt is made
to depict mean circulation patterns associated with observed-temperature climate changes in northwest Europe during the period
1780–1930. Use is made of observed pressure gradients associated with warm and
cold seasons and of computed annual wind directions at several stations.
Results are presented as possible winter and summer mean circulation patterns
at 30-yr intervals.”
The introduction of this article starts with “The
climatic warming which has been so pronounced in northern Europe has received
considerable study. The question arises as to how long this has been going on
and how wide spread it is”. This article seems to be about a very early study
on the question of the existence of climate change.
The next article mentioning climate change in AMS
journals was published 14 years later in August 1972 by Warren Washington from
the National Center for Atmospheric Research (NCAR). The name of the article is
“Numerical Climatic-Change Experiments: The Effect of Man’s Production of Thermal Energy” with the abstract:
“We describe in this
paper a set of general circulation model experiments on possible climate
changes caused by man's generation of thermal energy or pollution. Three
experiments were carried out: one in which we introduced only a small initial
error, one in which we added the expected ultimate levels of thermal energy
generation, and one in which we added a negative amount of thermal energy. In
all three experiments, we obtained the same results, indicating that the
thermal pollution effect is probably small compared to the natural fluctuations
of the model. We also discuss some limitations of the present model for
inferring the proper climatic-change response.”
The conclusions of
this study are interesting:
“Our basic conclusion
is that with the expected levels of man’s thermal energy production, there is a
relatively small modification of the model earth-atmosphere heat balance…
…Furthermore, we know
from geological records that natural fluctuations in climate occur, causing
temperatures over large areas of the globe vary by several degrees. Before we
can predict the small effect of man’s activities on climate, we must be able to
understand these natural fluctuations”.
Although this article says
the man’s effect is small, it is also mentioned that another 1971 article by
Rasool and Schneider have suggested that an increase in atmospheric aerosol
content by a factor of 4 may lead to a 3.5C
decrease in surface temperature.
The first time the phrase ‘global warming’ appears in
the abstract of an AMS article was March 1980. The article called “Effect of Ice-Albedo Feedback on Global Sensitivity in a One-Dimensional Radiative-Convective Climate Model” by Wei-Chyung Wang and Peter H. Stone. Their abstract is:
"The feedback between
ice albedo and temperature is included in a one-dimensional radiative-convective
climate model. The effect of this feedback on global sensitivity to changes in
solar constant is studied for the current climate conditions. This ice-albedo
feedback amplifies global sensitivity by 26 and 39%, respectively, for
assumptions of fixed cloud altitude and fixed cloud temperature. The global
sensitivity is not affected significantly if the latitudinal variations of mean
solar zenith angle and cloud cover are included in the global model. The
differences in global sensitivity between one-dimensional radiative-convective
models and energy balance models are examined. It is shown that the models are
in close agreement when the same feedback mechanisms are included. The
one-dimensional radiative-convective model with ice-albedo feedback included is
used to compute the equilibrium ice line as a function of solar constant. It is
found that the fixed cloud temperature parameterization breaks down before the
completely ice-covered earth instability sets in, i.e., the lowest cloud layer
intersects the ground. In addition, it is shown that the ice-albedo feedback
has a similar amplification effect on the global warming caused by increase in
atmospheric carbon dioxide concentration as in the case of solar constant
change.”
Comments
Post a Comment