Izvestiya of Saratov University.

Earth Sciences

ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)
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Language: 
Russian
Heading: 
Geography
Article type: 
Article
UDC: 
551.58
DOI: 
10.18500/1819-7663-2020-20-4-226-233

Estimation of Impulse Response of Earth’s Climate System at Century Time Interval

Autors: 
Bogdanov Mikhail Borisovich, Saratov State University
Chervyakov Maksim Yurievich, Saratov State University
Abstract: 

The Earth’s climate system (ECS) is considered as a linear system whose input is the change in the solar constant, and whose output is the global mean near-surface temperature anomaly. As a result of the restoration of the impulse response at century time interval using reconstructed data on the solar constant and global temperature it was shown that its time constant is 32 ± 14 years. The sensitivity of the ECS to radiative forcing is 1.31 ± 0.63 K·W-1·m2, and the positive feedback coefficient is 4.4 ± 2.1. The found values of the characteristics of the ECS do not contradict the data obtained by averaging over the ensemble of CMIP5 models.

Key words: 
Earth’s climate system
impulse response
time constant
sensitivity
heat capacity
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