Modified climate with long term memory in tree ring proxies

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F15%3A00473267" target="_blank" >RIV/86652079:_____/15:00473267 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1748-9326/10/8/084020" target="_blank" >http://dx.doi.org/10.1088/1748-9326/10/8/084020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-9326/10/8/084020" target="_blank" >10.1088/1748-9326/10/8/084020</a>

Result language

angličtina

Original language name

Modified climate with long term memory in tree ring proxies

Original language description

Long term memory (LTM) scaling behavior in worldwide tree-ring proxies and subsequent climate reconstructions is analyzed for and compared with the memory structure inherent to instrumental temperature and precipitation data. Detrended fluctuation analysis is employed to detect LTM, and its scaling exponent a is used to evaluate LTM. The results show that temperature and precipitation reconstructions based on ring width measurements (mean alpha = 0.8) contain more memory than records based on maximum latewood density (mean alpha = 0.7). Both exceed the memory inherent to regional instrumental data (alpha = 0.6 for temperature, alpha = 0.5 for precipitation) in the time scales ranging from 1 year up to 50 years. We compare memory-free (alpha = 0.5) pseudo-instrumental precipitation data with pseudo-reconstructed precipitation data with LTM (alpha > 0.5), and demonstrate the biasing influences of LTM on climate reconstructions. We call for attention to statistical analysis with regard to the variability of proxy-based chronologies or reconstructions, particularly with respect to the contained (i) trends, (ii) past warm/cold period and wet/dry periods; and (iii) extreme events.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EH - Ecology - communities

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental Research Letters

ISSN

1748-9326

e-ISSN

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Volume of the periodical

10

Issue of the periodical within the volume

8

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

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UT code for WoS article

000366999400021

EID of the result in the Scopus database

2-s2.0-84959403067