A plot of observed solar active region latitudes vs. time. This diagram, which resembles a butterfly, shows that the average latitude of active region formation drifts from high to low latitudes durin
g a sunspot cycle.
The BW climate classification, also known as the arid climate classification, is characterized by having precipitation amounts less than 1/2 potential evapotranspiration (POTET).
the BWh climate classification, also known as the hot low-latitude desert, is characterized by having mean annual temperatures greater than 18 degree C.