Give Reason: The seasonal changes are not abrupt
Answers
Answer:
Processes That Cause Abrupt Climate Change
Weather changes abruptly from day to day, and there is no basic difficulty in understanding such changes because they involve a “fast” and easily observed part of the climate system (e.g., clouds and precipitation). But mechanisms behind abrupt climate change must surmount a fundamental hurdle in that they must alter the working of a “slow” (i.e., persistent) component of the climate system (e.g., ocean fluxes) but must do so rapidly. Two key components of the climate system are oceans and land ice. In addition, the atmospheric response is a crucial ingredient in the mix of mechanisms that might lead to abrupt climate change because the atmosphere knits together the behavior of the other components. The atmosphere potentially also gives rise to threshold behavior in the system, whereby gradual changes in forcing yield nearly discontinuous changes in response.
A mechanism that might lead to abrupt climate change would need to have the following characteristics:
A trigger or, alternatively, a chaotic perturbation, with either one causing a threshold crossing (something that initiates the event).
An amplifier and globalizer to intensify and spread the influence of small or local changes.
A source of persistence, allowing the altered climate state to last for up to centuries or millennia.