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- Info
GIOVANNI PLOT TYPES
This page describes the common plot types available in Giovanni. Note that in addition to these common plot types, certain Giovanni interfaces may also provide other plot types not described here.
Single Parameter Plots
The following list contains the single parameter common plot types available in Giovanni. These plots are used for visualizing single parameters only:
Multi-Parameter Plots
The following list contains the multi-parameter common plots available in Giovanni. These plots are used for visualizing comparisons involving two or more parameters:
Plot Type |
Description |
Single/Multi Parameter |
Lat-Lon Map, Time-averaged |
The data values for each data grid are averaged over the user specified time range with interval weighted average, ave (see the full description of this function). |
Single |
Time Series, Area-averaged |
It creates a time series of area averages calculated with areal weighted averaging, aave (see the full description of this function). For a single point, time series is for the nearest grid point and no averaging or interpolating is performed. |
Single |
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No data analysis is done to this option. All grid values in user selected area are displayed for each of the time step within the user selected time period. If all grids have missing data for a given time step, a message "Entire Grid Undefined" will show. |
Single |
Time-Lon Hovmoller, Lat-averaged |
It creates a Time-Longitude cross-section by averaging user selected latitude range with ave (see the full description of this function), weighted by the difference between the sines of the latitude at the northern and southern edges of the grid box. |
Single |
Time-Lat Hovmoller, Lon-averaged |
It creates a Time-Latitude cross-section by averaging user selected longitude range with ave (see the full description of this function). |
Single |
Vertical Profile, Parameter vs. Pressure/Altitude |
It creates a Parameter vs. Pressure/Altitude vertical profile. Averaging over time, latitude or longitude is performed using ave (see the full description of this function) if a time period, latitude or longitude range is selected; an areal average is performed using aave(see the full description of this function) if an area is selected. |
Single |
Lon-Pressure Cross-section, Lat-averaged |
It creates a Longitude-Pressure cross-section by averaging user selected latitude range with ave (see the full description of this function), weighted by the difference between the sines of the latitude at the northern and southern edges of the grid box. |
Single |
Lat-Pressure Cross-section, Lon-averaged |
It creates a Latitude-Pressure cross-section by averaging user selected longitude range with ave (see the full description of this function). |
Single |
Overlay of Lat-Lon Map, Time-averaged
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Overlay plot of Lat-Lon maps for two selected parameters, averaged over the user specified time range
with interval weighted average, ave (see the full description
of this function). |
Multi (2 max) |
Difference of Lat-Lon Maps, Time-averaged
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Lat-Lon map of the difference between the two selected
parameters, averaged over the user specified
time range with interval weighted average, ave (see the full
description of this function).
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Multi (2 only) |
Overlay of Time Series, Area-averaged
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Overlay plot of time series averaged over selected area with
areal weighted averaging, aave (see the full description of this function)
for up to three selected parameters. For a single point,
time series are for the nearest
grid point and no averaging or interpolating is performed.
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Multi (2 or 3) |
Difference of Time Series, Area-averaged
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Time series plot for the difference between two selected
parameters, averaged over user selected area with
areal weighted averaging, aave (see the full description of this function).
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Multi (2 only) |
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Scatter plot for all non-missing values of two selectedparameters
in user specified area and time range.
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Multi (2 only) |
Scatter Plot, Area-averaged |
Scatter plot of two selectedparameters
averaged over a user specified area with areal weighted averaging, aave
(see the full description of this function) in the user specified time range.
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Multi (2 only) |
Scatter Plot, Time-averaged |
Scatter plot of two selected parameters averaged over a user specified time range with interval weighted average, ave (see the full description of this function) in the user specified area. |
Multi (2 only) |
Correlation Map of Time Series |
Lat-lon map of temporal correlation coefficients (lag = 0, ranging from -1 to 1) between
two selected time series.
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Multi (2 only) |
Correlation of Time Series, Area-averaged
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Single value of temporal correlation coefficient (lag = 0, ranging from -1
to 1) between two selected time series, averaged over user specified area with areal weighted averaging, aave (see the full description of this function).
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Multi (2 only) |
2-D Display Options
Please note that the following display options apply only to the Lat-Lon Maps, Animations, Cross-sections, and Hovmoller (longitude-time, latitude-time) plots.
| Option |
Description |
Sample Image |
Grid Fill |
Each grid cell in the image is filled with the color representing its data value. All data values are properly represented, but the image has a pixelated, or boxy appearance. |
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Shaded |
Contour surfaces are shaded using bi-linear interpolation. The image looks smooth, however isolated data points are not shown. |
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Combination |
This option overlays the contour shaded image on top of the grid filled image. This allows the image to appear smooth, while including isolated data values where coverage is sparse. |
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Example 1: Grid Fill
Example 2: Shaded
Example 3: Combination
Spatial Subsampling Options
Please note this option applies to ASCII output data only. Subsampling is done after any averaging has been performed, including averaging overtime for Lat-Lon Maps, longitudinal or latitudinal averaging for Hovmoller and Vertical Cross-section plots.
| Option |
Description |
Original |
The ASCII output data are given in the original native resolution. This is the default. |
Interval 2, 3, 4, or 5 |
The ASCII output data are subsampled along the spatial dimensions (latitude and/or longitude) with the user-specified subsampling interval of 2, 3, 4, or 5.
For example, subsampling with an interval of 3 will select every third grid cell across the spatial dimensions starting from the lower left corner of the user selected area. |
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Atmos Composition
