Changes in global climate heterogeneity under the 21st century global warming

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Guan , Y , Lu , H , Jiang , Y , Tian , P , Qiu , L , Heiskanen , J & Pellikka , P 2021 , ' Changes in global climate heterogeneity under the 21st century global warming ' , Ecological Indicators , vol. 130 , no. 108075 , 108075 . https://doi.org/10.1016/j.ecolind.2021.108075

Title: Changes in global climate heterogeneity under the 21st century global warming
Author: Guan, Yanlong; Lu, Hongwei; Jiang, Yelin; Tian, Peipei; Qiu, Lihua; Heiskanen, Janne; Pellikka, Petri
Other contributor: University of Helsinki, Department of Geosciences and Geography
University of Helsinki, Department of Geosciences and Geography
Date: 2021-11
Language: eng
Number of pages: 9
Belongs to series: Ecological Indicators
ISSN: 1470-160X
DOI: https://doi.org/10.1016/j.ecolind.2021.108075
URI: http://hdl.handle.net/10138/334840
Abstract: Variations in climate types are commonly used to describe changes in natural vegetation cover in response to global climate change. However, few attempts have been made to quantify the heterogeneous dynamics of climate types. In this study, based on the Coupled Model Intercomparison Project phase 5 (CMIP5) historical and representative concentration pathway (RCP) runs from 18 global climate models, we used Shannon's Diversity Index (SHDI) and Simpson's Diversity Index (SIDI) to characterise of global climate heterogeneity from a morphological perspective. Our results show that global climate heterogeneity calculated by the SHDI/SIDI indices decreased from 1901 to 2095 at a significance level of 0.01. As radiative forcing intensified from RCP 2.6 to 8.5, the SHDI/SIDI decreased significantly. Furthermore, we observed that the spatial distribution of global climate heterogeneity was significantly reduced, with a pronounced latitudinal trend. Sensitivity analysis indicated that the temperature increase played a more significant role in reducing global climate heterogeneity than precipitation under the three warming scenarios, which is possibly attributed to anthropogenic forcing. Our findings suggest that the dynamics of global climate heterogeneity can be an effective means of quantifying global biodiversity loss.
Subject: Climate diversity
Koppen-Geiger climate classification
Landscape
CMIP5
SHDI
SIDI
WORLD MAP
KOPPEN
SHIFTS
CLASSIFICATION
TEMPERATURE
MULTIMODEL
PATTERNS
IMPACTS
REGIONS
Köppen–Geiger climate classification
1172 Environmental sciences
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