Q38 (CDS-I/2010) Geography › World Physical Geography › Atmospheric pressure winds Answer Verified

The jet streams are

wind systems with a pronounced seasonal reverse at a direction

winds blowing from the subtropical high-pressure belts towards the subpolar low-pressure belts

narrow meandering bands of swift winds which blow in the midlatitudes near the tropopause and encircle the globe

winds blowing from the subpolar low- pressure belts towards the subtropical high-pressure belts

Result

Your answer: — · Correct: C

Explanation

Jet streams are defined as narrow, concentrated bands of high-velocity geostrophic winds located in the upper troposphere, specifically near the tropopause [4]. These winds typically flow from west to east at altitudes between 9,000 and 12,000 meters [2]. They are characterized by a meandering, wavelike pattern that encircles the globe in both the Northern and Southern Hemispheres [2][t2]. The meandering behavior is influenced by temperature gradients; a high gradient results in a straight path, while a lower gradient causes the stream to follow a wavy, irregular path with poleward or equatorward components [3]. While primary jet streams like the polar and subtropical jets are permanent features of the midlatitudes, temporary low-level jets also exist [c5]. Options 1, 2, and 4 describe monsoons or surface wind belts like the westerlies and trade winds, rather than the upper-level jet stream [t7].

Sources

[1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 27: Jet streams > Upper Tropospheric Westerlies > p. 385
[4] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 27: Jet streams > 27. Jet streams > p. 383
[2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > JET STREAM AND INDIAN MONSOON > p. 7
[3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 27: Jet streams > Meandering (Rossby Waves) > p. 386

How others answered

Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.

Community Performance

Out of everyone who attempted this question.

75%

got it right

Question map

The jet streams are

Explanation

SIMILAR QUESTIONS

Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?

Jet streams are usually found in the :

The seasonal reversal of winds is the typical characteristic of

The planetary winds that blow from the subtropical high- pressure belts to the Equator are known as—

Which of the following statements is/are correct? 1. The jet streams are high altitude easterly winds. 2. El Ni?s a warm ocean current. 3. El Ni?ppears along the Peru coast. Select the correct answer using the code given below.