GATE XE Atmospheric Science PYQs & Answers — Page 6

Questions 51–60 of 123. Imported answers require independent review unless marked reviewed.

The Rossby number of a synoptic system with a length scale of 1000 km, characteristic velocity scale of 10 m s⁻¹ at a latitude where the Coriolis parameter equals 10⁻⁴ s⁻¹, is ______. (Round off to two decimal places)

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The ratio of scattering efficiency of red light of wavelength 0.65 μm to blue light of wavelength 0.45 μm by air molecules in the atmosphere is _____. (Round off to two decimal places)

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An unsaturated moist air parcel undergoes adiabatic ascent in atmosphere without mixing with surrounding air. Air is so clean that there is no possibility for heterogeneous nucleation. Which one of the following plots depicts the vertical variation of water vapor pressure (shown as continuous line) and saturation water vapor pressure (shown as dotted/dashed line) of the parcel?

Diagram for Engineering Sciences question 163

Your answerChoose one option.

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Consider a layer of atmosphere where temperature increases with height. If the concentration of a vertically well-mixed greenhouse gas suddenly increases in this layer, then an immediate consequence is that

Your answerChoose one option.

infrared radiation leaving the top of the layer decreases.

infrared radiation leaving the top of the layer increases.

infrared radiation leaving the top of the layer remains unchanged.

the layer becomes optically thinner to infrared radiation.

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Which of the following statement(s) is/are true about northern hemisphere tropical cyclones?

Your answerSelect all correct options. You can choose more than one.

They have a warm core.

Their low-level flow is cyclonic.

Strong wind shear in the vertical is required for their intensification.

They are characterized by upper-level divergence.

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In gradient wind balance, which of the following statement(s) is/are true for flow around a region of low pressure in the northern hemisphere?

Your answerSelect all correct options. You can choose more than one.

The flow is clockwise.

The flow is anti-clockwise.

The wind speed is faster than the geostrophic wind.

The wind speed is slower than the geostrophic wind.

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Consider the atmosphere to be a heat engine, which converts absorbed radiation to kinetic energy of winds. Let the global mean radiation absorbed be 200 Wm⁻². In steady-state, if the global mean kinetic energy dissipation is 10 Wm⁻², then the efficiency of the atmospheric heat engine is ________%. (Round off to one decimal place)

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Consider a tornado in cyclostrophic balance. The tangential wind speed at a radial distance of 500 m from the center of the tornado is ______ m s⁻¹, if the pressure gradient at that location in the radial direction is 5 N m⁻³. Assume the density of air to be 1 kg m⁻³. (Round off to the nearest integer)

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Consider two weather stations A and B having the same altitude. Station B is 5 km north of Station A and is always 2 K warmer than Station A. A steady northerly wind blows at 1 m s⁻¹. The change in temperature at Station A in 2 hours is ________ K. (Round off to one decimal place)

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Assume the Earth is in radiative equilibrium with effective radiative temperature of 255 K. If the planetary albedo increases by 0.05, then the effective radiative temperature of the planet will be ______ K. (Round off to the nearest integer)

Given: Solar constant = 1370 Wm⁻² Stefan Boltzmann constant = 5.67×10⁻⁸ Wm⁻² K⁻⁴

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GATE XE Atmospheric Science PYQs

Question 161

Question 162

Question 163

Question 165

Question 168

Question 169

Question 171

Question 173

Question 174

Question 175