A heliostat automatically adjusts its position to track daily or
seasonal changes in the sun's position.
Not exact matches
To participate, students should be currently enrolled
in a high school earth sciences course (or equivalent) or an undergraduate meteorology course (or equivalent)
in which students have been taught how
seasonal changes in the relationship between the earth and the
sun affect hours of daylight, maximum height of the
sun in the sky, and the amount of energy a place on earth receives from the
sun.
For example, the ice ages during the last several million years — and the warmer periods
in between — appear to have been triggered by no more than a different
seasonal and latitudinal distribution of the solar energy absorbed by the Earth, not by a
change in output from the
sun.
The team concluded that the «inversion» of the brightness of Saturn's rings between 2005 and 2008 was caused by the
seasonal change in the ring opening angle to the
Sun and Earth.
In this study, we undertake another effort towards understanding the role of the Sun in changing or varying the Earth's climate on seasonal to decadal time scal
In this study, we undertake another effort towards understanding the role of the
Sun in changing or varying the Earth's climate on seasonal to decadal time scal
in changing or varying the Earth's climate on
seasonal to decadal time scale.
Though the Earth rotates around the
sun in an ellipsis, it's not the planet's
changing distance but rather its
changing orientation that determines
seasonal shift.
Although the primary driver of glacial — interglacial cycles lies
in the
seasonal and latitudinal distribution of incoming solar energy driven by
changes in the geometry of the Earth's orbit around the
Sun («orbital forcing»), reconstructions and simulations together show that the full magnitude of glacial — interglacial temperature and ice volume
changes can not be explained without accounting for
changes in atmospheric CO2 content and the associated climate feedbacks.
The initial
changes in temperature during this period are explained by
changes in the Earth's orbit around the
sun, which affects the amount of
seasonal sunlight reaching the Earth's surface.
The impact of tree planting
in previously unforested areas can be paradoxical, as it depends both on
seasonal changes in surface albedo, eg, from snowfall and
sun angle a and shadow area effects.