Question

d. observa que la curva de energía solar para el ecuador tiene dos pequeños picos en la primavera, equinoccio (21 de marzo) y el equinoccio de otoño (23 de septiembre). ¿qué crees que causa esto? (pista: piense en la dirección directa de los rayos del sol).

Explanation:

1. At the equinoxes (March 21 and September 23), the Earth's axis is tilted neither toward nor away from the sun, so the sun's direct rays strike the equator exactly.
2. This direct angle means solar energy is concentrated (not spread out over a larger area like when rays hit obliquely).
3. The equator also experiences nearly equal 12-hour day/night cycles at equinoxes, maximizing the daily duration of direct sunlight, creating small peaks in the solar energy curve before the sun's focus shifts toward the tropics for the solstices.

Answer:

The small peaks in solar energy at the equinoxes are caused by the sun's rays hitting the equator directly at these times, combined with nearly 12 hours of consistent daylight, leading to a brief maximum in solar irradiance before the sun's angle shifts slightly as the seasons progress.