Download - Applications of climatology
Applications of ClimatologyApplications of Climatology
Syed Taha AhmedSyed Taha Ahmed
AR - 016AR - 016
Climate is Climate is commonly defined as the commonly defined as the weather averaged over a weather averaged over a long period of time. In long period of time. In other other words, climate is the words, climate is the average weather average weather conditions experienced in conditions experienced in a particular place a particular place over a long period.over a long period.
Climate is defined as the collective state of the
atmosphere for a given place over a specified interval of
time.
Aim’s of climatology, is the object to climatology to make
us familiar with the average condition of the
atmosphere in different part of the earth’s surface, as well as to inform us concerning any departures from these
conditions which may occur at the same place during long
intervals of time.
There are three principal approaches to the study of There are three principal approaches to the study of climatologyclimatology::
The physical climatology approach seeks to explain the differences in climate
in light of the physical processes influencing climate and the processes producing
the various kinds of physical climates
Descriptive climatology typically orients itself in terms of geographic
regions ;it is often referred to as regional climatology. A description of the various types of
climates is made on the basis of analyzed statistics from a particular area.
Dynamic climatology attempts to relate
characteristics of the general
circulation of the entire atmosphere to the climate. Dynamic
climatology is used by the theoretical
meteorologist and addresses dynamic and thermodynamic effects.
Compute decadal means and standard Compute decadal means and standard deviation for SLP for two different deviation for SLP for two different
decades, compute the decades, compute the
t-statistic, and plot the 5% level as t-statistic, and plot the 5% level as stipplingstippling. .
Calculates monthly Calculates monthly climatologies and then climatologies and then
conducts an eof conducts an eof analysis. analysis.
Demonstrates the use of Demonstrates the use of clmMonLLT and and stdMonTLLto derive climatology to derive climatology and the interannual variability. Though this example derives the and the interannual variability. Though this example derives the
climatology based on the entire time period, a subset may be used by climatology based on the entire time period, a subset may be used by
using either conventional subscripting or coordinate dimensions.using either conventional subscripting or coordinate dimensions.
Demonstrates the use Demonstrates the use of of clmMonLLT to to derive a zonally derive a zonally
averaged annual averaged annual cycle. cycle.
Calculate the daily mean Calculate the daily mean annual cycle and daily annual cycle and daily
anomalies from the anomalies from the mean annual cycle. For mean annual cycle. For illustration: illustration: (a)(a) compute compute
raw and smoothed raw and smoothed annual annual
cycles; cycles; (b)(b) create a create a netCDF file of the daily netCDF file of the daily
anomalies;anomalies;(c)(c) plot plot results. results.
This example only uses 5-This example only uses 5-years of data. Hence, there years of data. Hence, there is considerable day-to-day is considerable day-to-day variability in this examplevariability in this example. .
The smoothed The smoothed annual cycle can be annual cycle can be thought of as the thought of as the values that would be values that would be obtained if there obtained if there was an infinite was an infinite ensemble of data ensemble of data under the same under the same
forcing conditions.forcing conditions.
(a)(a) Read files containing year-month data, Read files containing year-month data, (b)(b) create climatologies spanning user create climatologies spanning user specified years specified years (c)(c) plot November-April and May-October climatologies over a plot November-April and May-October climatologies over a
user specified regionuser specified region