Diurnal temperature range in the Arctic and its relation to hemispheric and Arctic circulation patterns

2000 ◽  
Vol 20 (3) ◽  
pp. 231-253 ◽  
Author(s):  
Rajmund Przybylak
Keyword(s):  
Diurnal Temperature Range ◽  
The Arctic ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Circulation Patterns

scholarly journals Effect of high- and low-pressure circulation patterns above mid-latitudes on the incidence of SARS-COV-2 across wider European sector during early spring 2020

2020 ◽  
Author(s):  
Marek Kučera ◽  
Athanasios Kyriazopoulos ◽  
Peter Kučera
Keyword(s):  
Incubation Time ◽  
Diurnal Temperature Range ◽  
Low Pressure ◽  
Early Spring ◽  
Pressure Pattern ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Circulation Patterns ◽  
Maximum Temperatures ◽  
Meteorological Elements

Abstract The presented paper evaluates SARS-CoV-2 in relation to high-, neutral and low- pressure zones above mid-latitudes (North Atlantic Oscillation/NAO and Arctic Oscillation/AO phases) and simultaneous effects of 8 meteorological elements across Europe and its wider region during early spring 2020. Data of national daily incidence of SARS-CoV-2 (for 86 countries and dependent territories) were correlated with daily values of 8 meteorological elements in 137 representative cities for 3 periods before an incidence day corresponding to incubation time of SARS-CoV-2. Period 0-9th day represented negative, period 5-14th day neutral and period 10-19th day positive NAO/AO pattern. Incubation time in last period was shifted, because some cases were linked to longer waiting for results of testing or in later course of SARS-CoV-2. Patterns linked with high-, neutral and low- pressure zones above mid-latitudes were outlined. Results have shown that, during the high-pressure pattern above mid-latitudes, lower precipitation, higher pressure, weaker wind, higher sunshine, higher diurnal temperature range (higher maximum and lower minimum temperatures) were very unfavorable for incidence of SARS-CoV-2 (more cases) and that, during the low-pressure pattern above mid-latitudes, lower pressure, higher wind and less than NAO+ lower precipitation, higher sunshine and higher diurnal temperature range (mainly higher maximum temperatures) were unfavorable. For comparison these results were outputted with circulation conditions NCEP/NCAR reanalysis. During NAO+, precipitation and wind/minimum temperatures, precipitation and pressure; during NAO-, minimum temperatures, wind and sunshine/maximum, minimum and average temperatures, precipitation, sunshine and snow cover have the most simultaneous same/opposite effects.

scholarly journals Comparison of Early Twentieth Century Arctic Warming and Contemporary Arctic Warming in the light of daily and sub-daily data

2022 ◽  
pp. 1-59
Keyword(s):  
Twentieth Century ◽  
Air Temperature ◽  
Diurnal Temperature Range ◽  
Surface Air Temperature ◽  
The Arctic ◽  
Arctic Warming ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Early Twentieth Century ◽  
Daily Data

Abstract A review of many studies published since the late 1920s reveals that the main driving mechanisms responsible for the Early Twentieth Century Arctic Warming (ETCAW) are not fully recognized. The main obstacle seems to be our limited knowledge about the climate of this period and some forcings. A deeper knowledge based on greater spatial and temporal resolution data is needed. The article provides new (or improved) knowledge about surface air temperature (SAT) conditions (including their extreme states) in the Arctic during the ETCAW. Daily and sub-daily data have been used (mean daily air temperature, maximum and minimum daily temperature, and diurnal temperature range). These were taken from ten individual years (selected from the period 1934–50) for six meteorological stations representing parts of five Arctic climatic regions. Standard SAT characteristics were analyzed (monthly, seasonal, and yearly means), as were rarely investigated aspects of SAT characteristics (e.g., number of characteristic days; day-to-day temperature variability; and onset, end, and duration of thermal seasons). The results were compared with analogical calculations done for data taken from the Contemporary Arctic Warming (CAW) period (2007–16). The Arctic experienced warming between the ETCAW and the CAW. The magnitude of warming was greatest in the Pacific (2.7 °C) and Canadian Arctic (1.9 °C) regions. A shortening of winter and lengthening of summer were registered. Furthermore, the climate was also a little more continental (except the Russian Arctic) and less stable (greater day-to-day variability and diurnal temperature range) during the ETCAW than during the CAW.

scholarly journals Spatiotemporal Analysis of Diurnal Temperature Range: Effect of Urbanization, Cloud Cover, Solar Radiation, and Precipitation

Climate ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 89 ◽  
Author(s):  
Andri Pyrgou ◽  
Mattheos Santamouris ◽  
Iro Livada
Keyword(s):  
Solar Radiation ◽  
Diurnal Temperature Range ◽  
Cloud Cover ◽  
Longwave Radiation ◽  
Ultraviolet B ◽  
Anthropogenic Sources ◽  
Daily Minimum Temperature ◽  
Urban Station ◽  
Diurnal Temperature ◽  
Temperature Range

High daily temperatures in the Mediterranean and Europe have been documented in observation and modeling studies. Long-term temperature data, from 1988 to 2017, from a suburban station and an urban station in Nicosia, Cyprus have been analyzed, and the diurnal temperature range (DTR) trend was investigated. The seasonal Mann–Kendall test revealed a decreasing DTR trend of −0.24 °C/decade at the urban station and −0.36 °C/decade at the suburban station, which were attributed to an increase in the daily minimum temperature. Variations in precipitation, longwave radiation, ultraviolet-A (UVA), ultraviolet-B (UVB), cloud cover, water vapor, and urbanization were used to assess their possible relationship with regional DTR. The clustering of daytime and night-time data showed a strong relationship between the DTR and observed cloud cover, net longwave radiation, and precipitation. Clouds associated with smaller shortwave and net longwave radiation reduce the DTR by decreasing the surface solar radiation, while atmospheric absolute humidity denotes an increased daytime surface evaporative cooling and higher absorption of the short and longwave radiation. The intra-cluster variation could be reduced, and the inter-cluster variance increased by the addition of other meteorological parameters and anthropogenic sources that affect DTR in order to develop a quantitative basis for assessing DTR variations.

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