B) according to figure 2.2. At approximately what time does sunrise occur in Oxf
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B) according to figure 2.2. At approximately what time does sunrise occur in Oxford and what time does it occur in Oslo on their summer solstice? C) approximately how many hours long is the shortest daylight period of the year in Oslo? Lab 2 LAB 2-Earth-Sun Relationships Key Ideas Revolution Plane of the ecliptic Circle of illuminatiorn Axial parallelism Subsolar point Equinox Solstice Sun angle Discussion Orbital Characteristics in its orbital path around the sun. The earth completes one revolution every 363.25 days e carth has two types of movement, daily rotation around its polar axis froem west to east, and variations in the orientation of the eaeth with respect to the sun cause variations in how The earth orbits around the sun in an elliptical path. That path is a smooth, flat plane. In other During the year solar energy is distributed over the earth. One result is the earth's annual cycle of seasons as the earth moves in its orbit around the sun it does not bob up and down. The plane surface of respect to this plane. The earth's axis is not perpendicular to the plane of the ecliptic, but maimains the its position on any other day of the year. Parallelism explains why the North Star caused by revolution, axial tilt, and parallelism. Factors that change seasonally include sach things as earth's orbital path is called the plane of the ecliptic. The earth remains in a constant orientation wih constant tilt of t plane of the ecliptic is the concept of axial parallelism, or just parallelism. The earth's axis on any day of the year is parallel to Polaris, is always directly overhead at the North Pole. Seasonal changes that we experience on earth are 3.5 off of perpendicular. This constant orientation of the earth's axis with respect to the emperature, the height of the noom sun in the sky, the length of the daylight period, and the position of the rising and setting sun with respect to the horizon. Seasonal Changes At any given time the sun illuminates one half of the earth. The line that divides the half in daylight from the half in darkness is called the circle of illumination because it traces out a circular circumference of the spherical earth. Solar energy reaches our planet as parallel rays of sunlight, but because of the earth's spherical shape, on any one day there is only one latitude that will receive those parallel rays from directly (vertically) overhead. Even at that one latitude, the sun's rays will not be directly overbead at dawn, dusk, late morning, or afternoon, but only at noon. The height of the sun in the maximum for the day, which is solar noon. Even on the latitude that is receiving vertical rays of the then, the exact longitudinal point currently experiencing the 90° sun angle changes as the earth rotates through the day. That exact point is called the subsolar point. The analemma (Fig. 2.1) is a diagram that shows the latitude of the subsolar point for every day of the year. Each day, the latitude of the subsolar point changes slightly because the earth has changed its position in its orbit slightly. The subsolar shifts day by day so that during the course of the year it moves from 23.5°8 (the Tropic of Capricorm) towards the equator, on to 23.S N (the Tropic of Cancer), back sky is always measured at its sun, towards the equator, and finally returning at the end of the year back to the Tropic of Capricorn. The subsolar point only occurs between latitudes 23.5 S and 23.5 N, a range of 47 of latitude GEO 121 D-G-Spring 2018Explanation / Answer
A) The daylight period at different locations will depend on the latitudes of those locations. The daylight length at lower latitudes (those latitudes very close to the equator) will experience approximately equal periods of day and night (that is, approximately 12 hours of day and night). The daylight period will be longer at locations of higher latitudes. On the day of summer solstice, that is, on June 21st, the location Oxford, Ohio experiences about 15 hours of daylight while Oslo Norway experiences close to 20 hours of daylight (this can be verified.by looking at the graph in Figure 2.2). Thus Oslo, Norway experiences a longer daylight period on the day of Summer Solstice (June 21st).
B) The summer solstice occurs on June 21st. From figure 2.2 (Horizontal axis represents the month; vertical axis represents the time in AM/PM; numbers on the contour lines represent the latitudes), you should observe that Sunrise at Oxford (located at approximately 40o N (look along the 40 contour line of the northern hemisphere)) occurs at around 4.30am while the sunrise at Oslo (located at around 60o N (look along the 60 contour line of the northern hemisphere)) occurs at around 2.30am.
C)The shortest daylight period in Oslo, Norway will be observed on the day of Winter Solstice (shortest day of the year; On this day the length of the night will be more than the length of day). On the day of the winter solstice (December 21st) in Oslo, Norway, the sun rises at approximately 9 am and sets at 3 pm. Hence the daylight period on this day is approximately 6 hours making it the shortest daylight period of the year in Oslo.
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