【People's Education Press】High School Geography: Elective Compulsory Course 1: The Nexus of Earth Systems: Interactions Among Natural Environmental Elements

The Earth system is not a mechanical aggregation of elements, but a finely tunedsuper heat engine. Atmosphere, water, biology, rocks, and soil exchange matter and energy through ocean-atmosphere interactions, hydrological cycles, and biological cycles, much like blood flowing through the body.

Core Nexus: Latent Heat and Water Balance

Latent Heat (Latent Heat): The ocean absorbs heat through evaporation and converts it into water vapor; this energy is released when the vapor condenses into precipitation in the atmosphere. This process acts as Earth’s 'hidden wallet' for redistributing energy across latitudes, effectively reducing temperature differences between the equator and poles.
Water Balance Principle (Water Balance): Changes in water storage in any region = inflow (precipitation, river inflow) - outflow (evaporation, river outflow). On a global scale, oceans and landmasses achieve dynamic equilibrium in water through rivers as the key connecting link.
Oceanic Circulation Transport: Ocean currents act like conveyor belts, redistributing water spatially and coupling global climate across space and time.

QUESTION 1

Based on the water balance principle, if global warming increases ocean evaporation, what is the most likely long-term change in terrestrial environments?

Terrestrial freshwater will permanently decrease because all water has moved into the atmosphere

Global water cycling becomes more active, potentially increasing precipitation and runoff on land

Land rivers will completely dry up because evaporation exceeds supply

QUESTION 2

Estimate the relative contributions of land and ocean to atmospheric water vapor—the primary source of atmospheric moisture is?

Ocean evaporation (approximately 86%)

Land transpiration (approximately 50%)

Glacial melting and vaporization

QUESTION 3

Ocean evaporation typically exceeds precipitation. What primarily compensates for this deficit?

Conversion of oxygen in the atmosphere

Direct outflow of deep groundwater

Terrestrial runoff flowing into the ocean (via rivers, etc.)

QUESTION 4

Which statement about the monsoon currents in the North Indian Ocean is correct?

It flows clockwise year-round due to the Coriolis effect

It flows clockwise in summer driven by the southwest monsoon and counterclockwise in winter driven by the northeast monsoon

This current only alters salinity and does not involve heat distribution

QUESTION 5

Which of the following statements about terrestrial water bodies is incorrect?

Terrestrial water bodies include rivers, lakes, glaciers, etc.

Rivers are a key connection among other water bodies

The distribution of terrestrial water bodies is primarily determined by human activity and not constrained by topography