List of top Atmospheric and Ocean Science Questions

If the global albedo is increased from 0.3 to 0.4, the global radiative equilibrium temperature (in K) would decrease by .......... (rounded off to one decimal place). (Consider no greenhouse effect, solar constant = 1360 W/m$^2$, Stefan–Boltzmann constant = $5.67 \times 10^{-8}$ W m$^{-2}$ K$^{-4}$).
A parcel of dry air having an initial temperature of 30 °C at 1000 hPa level is lifted adiabatically. At what pressure (in hPa) its density reduces by half? (Take $C_p/C_v = 0.71$, rounded off to two decimal places).
What will happen to the speed of a balanced flow as one moves across the isobar along a particular latitude?
The following illustration depicts the circulation pattern in the North Indian Ocean during the southwest (June–August) monsoon. Identify the markers numbered from 1–5 in the illustration and pick out the right choice.
Which among the following gases has the highest global warming potential?
From the following list identify the region that has low chlorophyll and low nutrients.
Which of the following is/are associated with winter rainfall over India?
Choose the correct statement(s) in context to Ekman spiral from the following:
Which one of the following is NOT a requirement for the development of tropical cyclones ?
The average elevation of the continents above sea level is about meters.
Which one of the following theories does not explain the origin of tides?
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Humidity decrease with altitude 
Reason R: At higher altitude the convective currents are very much reduced 
In the light of the above statements, choose the most appropriate answer from the options given below
Tropical cyclones develop as a result of balance between forces of
The run off increases with
Majority of rainfall in India is contributed by
Arrange the following salts in descending order of their share in the Oceans.
A. Magnesium chloride
B. Sodium chloride
C. Calcium sulphate
D. Magnesium sulphate
Choose the correct answer from the options given below:
Read the following with reference to ocean currents and identify the correct statement/statements.
.A. Winds and density differences are main causes of ocean currents.
B. Sub-tropical North Atlantic gyre movement is anti-clockwise.
C. Zone of warm water between the USA coast and the Gulf stream is called warm wall.
D. The currents in the Northern Indian Ocean change their flow direction four times in a year due to four monsoon seasons.
Choose the correct answer from the options given below:
Read the following statements carefully and identify the correct statements.
A. Equatorial low pressure belt is called doldrum due to strong winds and heavy rainfall.
B. Polar winds are part of the Ferrell Cell.
C. Atmospheric stability prevails when dry adiabatic lapse rate is higher than the normal lapse rate.
D. Clear sky, long nights and calm air are favourable for inversion of temperature.
Choose the correct answer from the options given below:
According to Koppen's climatic classification coastal parts of Tamil Nadu have which one of the following types of climate?
Which of the following is a low cloud?
Which one of the following is true about local winds?
A drifter on the surface of the ocean performs inertial oscillation. The speed of the drifter is 2 m s$^{-1}$ and the Coriolis parameter at the latitude is $2 \times 10^{-4}$ s$^{-1}$. The radius of the inertial oscillation is _________ km. (Round off to the nearest integer)
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).
Which of the following statement(s) is/are true regarding the biogeochemical cycle in the ocean?
Gravitational forces exerted by the Sun and the Moon are mainly responsible for ocean tides. Which of the following statement(s) regarding ocean tides is/are correct?