Evidence of decreasing diurnal temperature range in eastern Northern Hemisphere

Guan, Xiaodan; Cao, Cuimei; Zeng, Xinrui; Sun, Wenxing

doi:10.1088/2515-7620/ac5e0a

Cited by 5 publications

(5 citation statements)

References 27 publications

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“…The zonal average trends show decreasing DTR trend over the North Hemisphere, while it increased over the Southern Hemisphere. This is consistent with Guan et al (2022) who reported a decreasing DTR trend over the Northern Hemisphere between 1902 and 2011. They reported a decrease in DTR across the aridity gradient over the Northern Hemisphere, but positive trend was observed in the dry region of the northwestern hemisphere, which agrees with the results presented in this study.…”

Section: Resultssupporting

confidence: 93%

“…The lower increase in night-time warming and insignificant change in the long-term trend of soil moisture (Figure S2) raises the question of how these may impact the coupled processes of carbon assimilation and loss in the drylands. Drying conditions in the dry areas of the northeastern hemisphere is suggested to have impacted the differential warming of the region (Guan et al, 2022) due to an increase in the carbon release.…”

Section: Discussionmentioning

confidence: 99%

“…The recent IPCC report states an increase in the average global temperature from the 19th century to the current century, particularly in the past four decades, with a temperature increase of 0.99°C within the past two decades (IPCC, 2021). The increase in global mean temperature is characterized by a greater increase in night‐time temperature, with most of the warming occurring in the night period compared to the daytime (Easterling et al, 1997; Guan et al, 2022; Karl et al, 1993). This uneven warming has caused a change in the global diurnal temperature range (DTR) trend, which is therefore recognized as an essential indicator of climate change (Shen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Increased diurnal temperature range in global drylands in more recent decades

Daramola,

Li,

2023

Intl Journal of Climatology

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The diurnal temperature range (DTR) has generally decreased at global scale according to the IPCC reports and previous publications. Here, we examined the change in DTR within the past four decades and found that DTR decreased in wet areas, but it increased in dry areas. This is because the daily minimum air temperature (Tmin) increased at a slower rate than the daily maximum air temperature (Tmax) in the dry areas, while it increased more rapidly in the wet areas. The changes in cloud cover, water vapour and moisture flux were observed to have contributed to the observed change in DTR. The change in moisture flux largely contributed to this change through the indirect effect on the change in water vapour across the aridity gradient. The significant impact of moisture flux is linked to the differential change in moisture flux between the dry and wet zones.

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Section: Resultssupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Increased diurnal temperature range in global drylands in more recent decades

Daramola,

Li,

2023

Intl Journal of Climatology

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“…Asymmetrical changes in maximum and minimum air temperatures lead to a mosaic of either downward or upward trends in DTR depending on the region/site, suggesting topographical and geographical variabilities, although there are cities with no significant trend. Most previous studies have shown a decrease in global DTR over recent decades [19][20][21]59], while some other studies that focus on specific regions have reported increasing trends in DTR [23,[30][31][32][33]60]. In Spain, for example, the maximum air temperature has increased at a higher rate than the minimum air temperature since 1961 [33], and in the Baltic region, an increasing trend in DTR depending on the season has also been reported [23].…”

Section: Discussionmentioning

confidence: 96%

Diurnal Temperature Range and Its Response to Heat Waves in 16 European Cities—Current and Future Trends

Katavoutas,

Founda,

Varotsos

et al. 2023

Sustainability

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An important indicator of climate change is the diurnal temperature range (DTR), defined as the difference between the daily maximum and daily minimum air temperature. This study aims to investigate the DTR distribution in European cities of different background climates in relation to the season of the year, climate class and latitude, as well as its response to exceptionally hot weather. The analysis is based on long-term observational records (1961–2019) coupled with Regional Climate Model (RCM) data in order to detect any projected DTR trends by the end of the 21st century under intermediate and high emission greenhouse gases (GHGs) scenarios. The analysis reveals marked variations in the magnitude of DTR values between the cities, on the one hand, and distinct patterns of the DTR distribution according to the climate class of each city, on the other. The results also indicate strong seasonal variability in most of the cities, except for the Mediterranean coastal ones. DTR is found to increase during hot days and heat wave (HW) days compared to summer normal days. High latitude cities experience higher increases (3.7 °C to 5.7 °C for hot days, 3.1 °C to 5.7 °C for HW days) compared to low latitude cities (1.3 °C to 3.6 °C for hot days, 0.5 °C to 3.4 °C for HW days). The DTR is projected to significantly decrease in northernmost cities (Helsinki, Stockholm, Oslo), while it is expected to significantly increase in Madrid by the end of the 21st century under both the intermediate- and high-emission scenarios, due to the asymmetric temperature change. The asymmetrical response of global warming is more pronounced under the high-emission scenario where more cities at higher latitudes (Warsaw, Berlin, Rotterdam) are added to those with a statistically significant decrease in DTR, while others (Bucharest, Nicosia, Zurich) are added to those with an increase in DTR.

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“…Both of them show strong linkages with human health, vegetation, crop yields, and physical infrastructure (Fontana et al, 2015;Zuo et al, 2015;Ramamurthy et al, 2017;Shiflett et al, 2017;Yuan et al, 2019). In spite of overall trend toward warmer temperatures (Franzke, 2015), numerous studies revealed that nighttime minimum temperatures increased at a faster rate than the daytime maximum temperatures, resulting in a decrease in the diurnal temperature range on global scale and regional scale (Gan et al, 2019;Guan et al, 2022). Specifically, Tmin has been increasing roughly twice as fast as Tmax since 1950 in most parts of the world (Vose et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Dominant role of Atlantic multidecadal oscillation in the tipping point of maximum and minimum temperatures over inner East Asia

Guo

Guan

et al. 2022

Intl Journal of Climatology

Self Cite

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Despite unprecedented heatwave events reported in the past two decades over inner East Asia, the maximum and minimum temperatures of Tmax and Tmin do not always exhibit continuous increasing. After drastic increases in Tmax and Tmin appeared over inner East Asia from 1982, a decreasing trend occurred around 1998, which was closely associated with the Atlantic multidecadal oscillation (AMO). During 1950-2014, the correlation between Tmax (Tmin) and AMO at the decadal time scale reached 0.70 (0.83); and 65% (79%) variance of the decadal variability in Tmax (Tmin) was explained by the AMO and three other classic oceanic modes; the contribution of the AMO was up to 82% (91%) in the decadal modulated oscillation. The declines of Tmin and Tmax synchronized with the downward swing of the AMO since the late-1990 s, which was because the AMO could affect the vertical motion and wind anomalies of inner East Asia through the cyclonic-anticyclonic teleconnection wave train in the mid-latitudes of the Northern Hemisphere. The results of composite analysis show that during the positive phase of the AMO, a local ascending motion was enhanced over inner East Asia and a large-scale abnormal high was found north of East Asia in favour of cold air intrusion. Meanwhile, the start of growing season was delayed by the positive phase of the AMO over the northern part of inner East Asia due to the high sensitivity of spring phenology to the Tmin controlled by the AMO.

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Evidence of decreasing diurnal temperature range in eastern Northern Hemisphere

Cited by 5 publications

References 27 publications

Increased diurnal temperature range in global drylands in more recent decades

Increased diurnal temperature range in global drylands in more recent decades

Diurnal Temperature Range and Its Response to Heat Waves in 16 European Cities—Current and Future Trends

Dominant role of Atlantic multidecadal oscillation in the tipping point of maximum and minimum temperatures over inner East Asia

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