Which of the following statements about glaciers is not true?

Question

BlackTom AI · Accepted Answer

Let’s break down the statement options one by one in relation to glaciers and climate.
Option 1: 'In the summer, meltwater streams are common in the lower reaches of glaciers' This is generally true. Lower elevations of glaciers often experience surface melting during warm summer conditions, creating melt streams and englacial channels that transport meltwater downslope and contribute to mass balance dynamics.
Option 2: 'Glaciers are more reflective than many other types of earth surfaces' This is true. Glaciers have high albedo due to fresh, clean ice and snow cover, reflecting a larger portion of incoming solar radiation compared to bare rock or soil, which helps influence local energy balance.
Option 3: 'Glaciers are strongly connected to the overall hydrologic cycle' This is true. Glaciers store freshwater as ice and release it seasonally through melt, feeding rivers and groundwater and interacting with atmospheric moisture and precipitation patterns as part of the global hydrologic system.
Option 4: 'Glaciers are insensitive to local climate and do not respond to climate change' This is not true. Glaciers are highly sensitive to climate variables such as temperature and precipitation. Warming temperatures promote melting and retreat, while changes in snowfall affect accumulation, so glaciers respond noticeably to climate change.
Option 5: 'The ice moves forward, but the ice front can melt back faster than the ice moves forward' This describes a common dynamic observed in glacier termini: flow and advance are opposed by ablation at the front, so a retreating terminus occurs when meltback outpaces forward ice velocity, making this statement accurate in many glacier systems.
In summary, the only statement that is not true is that glaciers are insensitive to local climate and do not respond to climate change; glaciers do respond strongly to climate forcing, which makes Option 4 the correct choice for a 'not true' statement.

Which of the following statements about glaciers is not true? 单项选择题

类似问题

Question at position 40 What is glacial calving? A glacier breaking up or splintering so as to produce a detached piece.A glacier thinning by melting down.A glacier expanding, producing more ice coverage.

True/False: There are still glaciers in the Sierra Nevada Mountain range.

[REQUIRED] What type of glacier carves U-shaped features, like those seen at Yosemite National Park?

Glaciers play an important role in the water cycle and global warming. Which are true of the following statements ? (check all that apply):

A 62.9 kg lady is standing on a weighing scale in an elevator as shown in the diagram below. Assume gravitational acceleration = 15 ms-2 Given that the elevator is accelerating upwards at 3.7 ms-2 , determine the magnitude of the normal force on the lady.

An object is fired from ground level at an angle of 31.9 degrees to the horizontal. Taking acceleration due to gravity = 7.65 ms-2 If the initial speed is 5.6 ms-1, how far from the starting point will it hit the ground? Assume air resistance is negligible.

Which of the following equations of motion would be used to calculate the displacement given the initial and final velocities as well as the acceleration?

A 51.8 kg lady is standing on a weighing scale (calibrated to 9.81 ms-2) in an elevator as shown in the diagram below. The scale is then calibrated to 7.67 ms-2 Given that the elevator is accelerating downwards at 2.2 ms-2 , determine the reading on the scale.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单