Grand Canyon Microclimatology_ Treelines_ GPH 112_ Intro to Phys Geography Lab (2022 Fall)

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10/9/23, 3:50 PM Grand Canyon Microclimatology: Treelines: GPH 112: Intro to Phys Geography Lab (2022 Fall) https://canvas.asu.edu/courses/130801/quizzes/973228?module_item_id=9000710 1/5 Grand Canyon Microclimatology: Treelines Due Oct 12, 2022 at 11:59pm Points 9 Questions 3 Time Limit None Instructions Exposure of a slope can have a dramatic impact on vegetation due to differences in surface heating and the resulting evaporation. What you’ll be looking at next is how treeline varies between north versus south facing slopes on walls in the Grand Canyon. This portion of the lab will task you with finding the lowest elevation for the treeline on either north facing or south facing slopes, comparing 3 different locations. One is for north-facing slopes. The other is for south facing slopes. You will have two questions like this: EXAMPLE QUESTION: Fast travel to the three coordinate locations in the geovisualization. What is the slope orientation (north facing, south facing) and mean (average) height of the transition zone between desert (brown, no trees) and pinyon-juniper woodland (green, leafy trees) for these locations? Part of the task has you understand the compass in the geovisualzation. What direction is the slope you are sent to facing. Then, the other part is taking the elevations and averaging them. Two examples are given below, but you’ll have three spots in the question. Look only at the cliff you begin at; you may see spots of vegetation down below your fast travel location, but those are not related to answering this question - they could be related to a natural spring and associated with a riparian habitat. Just focus on the treeline present on the cliff the coordinates take you to. For this simple example, treeline elevation = (1051 + 1201) / 2 = 1126 meters.

10/9/23, 3:50 PM Grand Canyon Microclimatology: Treelines: GPH 112: Intro to Phys Geography Lab (2022 Fall) https://canvas.asu.edu/courses/130801/quizzes/973228?module_item_id=9000710 2/5 Attempt History Attempt Time S LATEST Attempt 1 2 minutes 9 Score for this quiz: 9 out of 9 Submitted Oct 12, 2022 at 2:02pm This attempt took 2 minutes. HINT : the answer choice in canvas will probably not be EXACTLY what you calculat where you locate your avatar will be slightly different from where we put our avatar. will mean that you should pick THE CLOSEST ANSWER. The incorrect choices wil facing the wrong direction. 4 / 4 pts Question 1 Fast travel to the three coordinate locations below in the geovisualization. What is the slope orientation (north facing, south facing) and mean height of the transition zone between desert (brown, no trees) and pinyon-juniper woodland (green, leafy trees) for these locations? Location 1: 36.2621, -111.9174 Location 2: 36.0166, -111.8922 Location 3: 36.0098, -111.9324 North facing slopes with a treeline of roughly 1500m North facing slopes with a treeline of roughly 1350m Correct! Correct! South facing slopes with a treeline of roughly 1350m South facing slopes with a treeline of roughly 1500m

10/9/23, 3:50 PM Grand Canyon Microclimatology: Treelines: GPH 112: Intro to Phys Geography Lab (2022 Fall) https://canvas.asu.edu/courses/130801/quizzes/973228?module_item_id=9000710 3/5 If you look back at this classic graph, I wonder what you think about their job of generalizing treeline data. This sort of observation would be great to include in the essay (if you decide to try it). 4 / 4 pts Question 2 Fast travel to the three coordinate locations below in the geovisualization. What is the slope orientation (north facing, south facing) and mean height of the transition zone between desert (brown, no trees) and pinyon-juniper woodland (green, leafy trees) for these locations? Location 1: 36.2056, -112.2364 Location 2: 36.2049, -112.2556 Location 3: 36.1192, -111.9541 North facings slopes with a treeline of roughly 1770m South facing slopes with a treeline of roughly 1770m Correct! Correct! North facing slopes with a treeline of roughly 1450m South facings lopes with a treeline of roughly 1450m

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10/9/23, 3:50 PM Grand Canyon Microclimatology: Treelines: GPH 112: Intro to Phys Geography Lab (2022 Fall) https://canvas.asu.edu/courses/130801/quizzes/973228?module_item_id=9000710 4/5 If you look back at this classic graph, I wonder what you think about their job of generalizing treeline data. This sort of observation would be great to include in the essay (if you decide to try it). 1 / 1 pts Question 3 From your calculations, what is the treeline difference between north facing and south facing cliffs? Why do you think this might be? South facing has a higher treeline, due to cooler temperatures, more evaporation of moisture North facing has a higher treeline, due to cooler temperatures, less evaporation of moisture North facing has a lower treeline, due to cooler temperatures, less evaporation of moisture Correct! Correct!

Grand Canyon Microclimatology_ Treelines_ GPH 112_ Intro to Phys Geography Lab (2022 Fall)

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