Interactive comment on “ Volcanic effects on climate : revisiting the mechanisms ” by H . - F . Graf
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چکیده
The paper addresses an important problem of mechanisms of sensitivity of highlatitude circulation with respect to volcanic forcing. The authors attempted to distinguish two major mechanisms based on reflection and refraction of planetary waves using analysis of NCEP data assimilation output for the period from 1958 to 2002. All previous data analyses were conducted using mostly surface data. Therefore this is a logical and useful study. However, the results suffer from insufficient sampling. The reanalysis includes responses to all physical disturbances and therefore exhibits higher variability than model results. At the same time the sample sizes especially for volcanic cases are significantly smaller than in the recent model studies referenced for compar-
منابع مشابه
Volcanic effects on climate: revisiting the mechanisms
The characteristics of planetary wave energy propagation are being compared based on NCEP reanalysis data from 1958 to 2002 between boreal winters after strong volcanic eruptions, non-volcanic winters and episodes of strong polar vortex lasting at least 30 days. It shows that in the volcanically disturbed winters much more planetary wave energy is produced in the troposphere, passes through the...
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تاریخ انتشار 2007