Increasing Global Terrestrial Diurnal Temperature Range for 1980–2021

Huang，Xiaowen1; Dunn，Robert J.H.2; Li，Laurent Z.X.3; McVicar，Tim R.4,5; Azorin-Molina，Cesar6; Zeng，Zhenzhong1

2023-06-16

10.1029/2023GL103503

Geophysical Research Letters   Impact Factor & Quartile

0094-8276

1944-8007

The 2021 IPCC report found that most studies show declining trends for the global diurnal temperature range (DTR) since the 1950s, decreasing mainly during 1960–1980. This issue is revisited here using an up-to-date in-situ data set, Hadley Center Integrated Surface Database, constrained by rigorous station selection conditions. The global observed DTR trend was found to reverse during 1980–2021, increasing significantly at a rate of 0.091 ± 0.008°C decade. The trend was dominated by a faster rate of increasing daily maximum air temperature. This increasing observed trend in the past four decades was not fully captured in raw CMIP6 models, as models only partially capture the spatial patterns. With global CMIP6 outputs and regionally-available observations, the global land DTR was then estimated, through emergent constraints, to be 0.063 ± 0.012°C decade. The study raises concern for risks of increasing DTR globally and provides new insights into global DTR assessment.

CMIP6 models diurnal temperature range emergent constraint in-situ observation sub-daily data

English

NI Journal Papers

First ; Corresponding

National Natural Science Foundation of China[42071022];

GEOSCIENCES

2-s2.0-85162137171

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Met Office Hadley Centre,Exeter,United Kingdom
3.Laboratoire de Météorologie Dynamique,Centre National de la Recherche Scientifique,Sorbonne Université,Ecole Normale Supérieure,Ecole Polytechnique,Paris,France
4.CSIRO Environment,Canberra,Australia
5.Australian Research Council Centre of Excellence for Climate Extremes,Canberra,Australia
6.Centro de Investigaciones sobre Desertificación,Consejo Superior de Investigaciones Científicas (CIDE,CSIC-UV-Generalitat Valenciana),Climate,Atmosphere and Ocean Laboratory (Climatoc-Lab),Valencia,Spain

Huang，Xiaowen,Dunn，Robert J.H.,Li，Laurent Z.X.,等. Increasing Global Terrestrial Diurnal Temperature Range for 1980–2021[J]. Geophysical Research Letters,2023,50(11).

Huang，Xiaowen,Dunn，Robert J.H.,Li，Laurent Z.X.,McVicar，Tim R.,Azorin-Molina，Cesar,&Zeng，Zhenzhong.(2023).Increasing Global Terrestrial Diurnal Temperature Range for 1980–2021.Geophysical Research Letters,50(11).

Huang，Xiaowen,et al."Increasing Global Terrestrial Diurnal Temperature Range for 1980–2021".Geophysical Research Letters 50.11(2023).