Instructor: This video will give a brief overview
of the global aridity index
and how this data can be used in your variety search.
The global aridity index is modeled
using the WorldClim global climate data.
The aridity index is a ratio
of the mean annual precipitation
and the mean annual potential evapotranspiration.
In the global aridity index,
values increase for more humid conditions
and decrease for more arid conditions.
We can see on this map
that the eastern half of the United States
as well as some areas in the Northwest are considered humid.
Areas of the Southwest U.S. are considered arid.
Back on our map of studies,
we can use the aridity index filter to narrow our search.
If you're a grower in a humid environment,
you may filter out studies
that were conducted in arid areas by sliding this toolbar
to show values only greater than .65.
You may also directly type the lower bound of your value
into the box here.
Can clear our (indistinct) filter here
and if we're a grower in an arid environment,
we can filter our results
to show values only less than .65.
Aridity index ranges for subclasses are listed
in the table below.
We've also included a link to more detailed information
about how the global aridity index values were calculated
if you'd like to know more.