scholarly journals The air temperature variability during the cold period on the Kola Peninsula as modification factor of the ice regime

2021 ◽  
Vol 11 (3) ◽  
pp. 397-405
Author(s):  
L.S. Banshchikova ◽  
◽  
A.E. Sumachev ◽  
Keyword(s):  
Kola Peninsula ◽  
Air Temperature ◽  
Control Period ◽  
Cold Season ◽  
Temperature Variability ◽  
Average Temperature ◽  
Modification Factor ◽  
Ice Regime ◽  
And Control

The paper considers the long-term spatial and temporal air temperature variability on the Kola Peninsula according to 26 hydro-meteorological stations and the ice regime of rivers according to 13 hydrological stations for 1950—2018 (base period 1950—1980, and control period 1981—2018). The cold season of the year on the Kola Peninsula lasts from October to the first decade of May, the average temperature for the season is –6.2°C. The average increase in air temperature during the cold season was 1.1 °C.

Long-term air temperature variability on the Crimean Peninsula

2017 ◽  
Vol 38 (1) ◽  
pp. 86-92
Author(s):  
V. M. Fedorov ◽  
R. V. Gorbunov ◽  
T. Yu. Gorbunova ◽  
N. K. Kononova
Keyword(s):  
Air Temperature ◽  
Temperature Variability ◽  
Crimean Peninsula ◽  
The Crimean Peninsula

scholarly journals The ice regime of Lake Raduńskie Górne (Kashubian Lakeland, northern Poland)

2017 ◽  
Vol 17 (2) ◽  
pp. 61-70 ◽  
Author(s):  
Jacek Barańczuk ◽  
Elżbieta Bajkiewicz-Grabowska ◽  
Katarzyna Barańczuk ◽  
Wojciech Staszek
Keyword(s):  
Air Temperature ◽  
Ice Cover ◽  
Ice Dynamics ◽  
Winter Half ◽  
The Mean ◽  
Ice Regime ◽  
Cover Thickness ◽  
Ice Phenomena ◽  
Ice Phenology

AbstractThe paper presents assessment results of the ice dynamics on Lake Raduńskie Górne (Upper Radunia Lake) based on long-term observations of the course of ice phenomena. Interannual changes in lake ice phenology parameters (freeze-onset, ice-on, freeze duration, melt-onset, permanent ice cover duration, ice-off, melt duration) in the years 1961–2010 are discussed. In addition, the ice cover thickness was taken into consideration. The analysed parameters of ice phenology were compared to each other as well as to the mean air and water temperatures of the winter half-year (November–April). The main periods of the ice regime of the lake have been determined and described. The permanent ice cover constitutes on average 79%, freeze-up period 13%, and break-up period 8% of the whole time of ice phenomena. It was shown that the weather parameters crucial for ice formation are the mean air and surface water temperatures. On Lake Raduńskie Górne the ice phenomena can only occur when mean air temperature in the winter half-year, at Borucino wheather station, is lower than 4.9°C, and water temperature (at a depth of 0.4 m) is lower than 5.7°C. In turn permanent ice cover is created when the mean air temperature of the winter half-year is lower than 3.9°C. The maximum and mean ice cover thickness on Lake Raduńskie Górne ranged, respectively, from 0.5 to 50 cm, and from 0.5 to 38.3 cm. These parameters were strongly positively correlated (r = 0.87–0.88, p <0.05) with the duration of the ice cover period.

scholarly journals Amplification and dampening of soil respiration by changes in temperature variability

2010 ◽  
Vol 7 (6) ◽  
pp. 8979-9008 ◽  
Author(s):  
C. A. Sierra ◽  
M. E. Harmon ◽  
E. Thomann ◽  
S. S. Perakis ◽  
H. W. Loescher
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Anthropogenic Activities ◽  
Temperature Variability ◽  
Average Temperature ◽  
Carbon Release ◽  
Mean And Variance ◽  
Future Warming ◽  
Climatic System

Abstract. Accelerated release of carbon from soils is one of the most important feedbacks related to anthropogenically induced climate change. Studies addressing the mechanisms for soil carbon release through organic matter decomposition have focused on the effect of changes in the average temperature, with little attention to changes in temperature variability. Anthropogenic activities are likely to modify both the average state and the variability of the climatic system; therefore, the effects of future warming on decomposition should not only focus on trends in the average temperature, but also variability expressed as a change of the probability distribution of temperature. Using analytical and numerical analyses we tested common relationships between temperature and respiration and found that the variability of temperature plays an important role determining respiration rates of soil organic matter. Changes in temperature variability, without changes in the average temperature, can affect the amount of carbon released through respiration over the long-term. Furthermore, simultaneous changes in the average and variance of temperature can either amplify or dampen the release of carbon through soil respiration as climate regimes change. These effects depend on the degree of convexity of the relationship between temperature and respiration and the magnitude of the change in temperature variance. A potential consequence of this effect of variability would be higher respiration in regions where both the mean and variance of temperature are expected to increase, such as in some low latitude regions; and lower amounts of respiration where the average temperature is expected to increase and the variance to decrease, such as in northern high latitudes.

scholarly journals Effects of long-term average temperature and temperature variability on cardiovascular disease hospitalizations in the US Medicare population

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Jochem O. Klompmaker ◽  
Francince Laden ◽  
Peter James ◽  
Benjamin M. Sabath ◽  
Xiao Wu ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Temperature Variability ◽  
Average Temperature ◽  
Medicare Population ◽  
The Us

scholarly journals The role of blocking circulation and emerging open water feedbacks on Greenland cold‐season air temperature variability over the last century

2020 ◽  
Author(s):  
Thomas J. Ballinger ◽  
Edward Hanna ◽  
Richard J. Hall ◽  
J. Rachel Carr ◽  
Saber Brasher ◽  
...  
Keyword(s):  
Air Temperature ◽  
Open Water ◽  
Cold Season ◽  
Temperature Variability

scholarly journals Amplification and dampening of soil respiration by changes in temperature variability

2011 ◽  
Vol 8 (4) ◽  
pp. 951-961 ◽  
Author(s):  
C. A. Sierra ◽  
M. E. Harmon ◽  
E. Thomann ◽  
S. S. Perakis ◽  
H. W. Loescher
Keyword(s):  
Organic Matter ◽  
Soil Respiration ◽  
Anthropogenic Activities ◽  
Temperature Variability ◽  
Average Temperature ◽  
Carbon Release ◽  
Mean And Variance ◽  
Future Warming ◽  
Climatic System

Abstract. Accelerated release of carbon from soils is one of the most important feedbacks related to anthropogenically induced climate change. Studies addressing the mechanisms for soil carbon release through organic matter decomposition have focused on the effect of changes in the average temperature, with little attention to changes in temperature variability. Anthropogenic activities are likely to modify both the average state and the variability of the climatic system; therefore, the effects of future warming on decomposition should not only focus on trends in the average temperature, but also variability expressed as a change of the probability distribution of temperature. Using analytical and numerical analyses we tested common relationships between temperature and respiration and found that the variability of temperature plays an important role determining respiration rates of soil organic matter. Changes in temperature variability, without changes in the average temperature, can affect the amount of carbon released through respiration over the long-term. Furthermore, simultaneous changes in the average and variance of temperature can either amplify or dampen the release of carbon through soil respiration as climate regimes change. These effects depend on the degree of convexity of the relationship between temperature and respiration and the magnitude of the change in temperature variance. A potential consequence of this effect of variability would be higher respiration in regions where both the mean and variance of temperature are expected to increase, such as in some low latitude regions; and lower amounts of respiration where the average temperature is expected to increase and the variance to decrease, such as in northern high latitudes.

scholarly journals Effect of climate warming on a change in thermal and ice conditions in the largest lake in Poland – Lake Śniardwy

2020 ◽  
Vol 68 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Mariusz Ptak ◽  
Mariusz Sojka ◽  
Bogumił Nowak
Keyword(s):  
Water Temperature ◽  
Air Temperature ◽  
Ice Cover ◽  
Considerable Change ◽  
Pettitt Test ◽  
Ice Conditions ◽  
Ice Regime ◽  
Annual Water ◽  
Annual Water Temperature

AbstractLake Śniardwy is the largest among more than 7000 Polish lakes. So far, it has not been a subject of detailed investigations concerning long-term changes in water temperature or ice regime. A considerable change in thermal and ice conditions has been observed in the period 1972–2019. Mean annual water temperature increased by 0.44°C dec−1 on average, and was higher than an increase in air temperature (0.33°C dec−1). In the monthly cycle, the most dynamic changes occurred in April (0.77°C dec−1). In the case of ice cover, it appeared increasingly later (5.3 days dec−1), and disappeared earlier (3.0 days dec−1). The thickness of ice cover also decreased (2.4 cm dec−1). Statistical analysis by means of a Pettitt test showed that the critical moment for the transformations of the thermal and ice regime was the end of the 1980’s. In addition to the obvious relations with air temperature for both characteristics, it was evidenced that the occurrence of ice cover depended on wind speed and snow cover. The recorded changes in the case of Lake Śniardwy are considered unfavourable, and their consequences will affect the course of physical, chemical, and biological processes in the largest lake in Poland.

scholarly journals Air temperature in Southern Roztochia

2015 ◽  
pp. 239-245
Author(s):  
Bohdan Mucha ◽  
Iryna Bulavenko ◽  
Oksana Rodych
Keyword(s):  
Air Temperature ◽  
Meteorological Data ◽  
Warming Trend ◽  
Annual Average ◽  
Regional Warming ◽  
Average Temperature ◽  
Air Temperatures ◽  
Average Maximum ◽  
National University

The demonstration and analysis of the monthly and annual average air temperatures in Southern Roztochia for last 46 years are proposed. The meteorological data of the Roztochia landscapegeophysical station (RLGS) of Ivan Franko National University of Lviv have served as the starting material for this publication. The long-term value of the average air temperature in RLGS has been defined. The average temperature warming by 2 °C has occurred from 1970 to 2000 and the amplitude of fluctuations of average temperatures has increased since 2000. The fact of a gradual warming trend in the region Roztochia and the adjacent Small Polissia was confirmed as an attribute of the consequences of global warming and drainage reclamation during the XX century. The graphs for annual average, maximum and minimum air temperatures for last 46 years were concluded for the duration of 5 years at the seasons. The coldest period of research is the years 1969–1989 and the warmest ones are the years since 2000 and especially 2015. The parameters of extreme warming in 2015 were fixed in agriculture and water management. We are warning about the possibility of aridization of the territory as a result of the trend of warming. The ways of preventing of regional warming due to reducing the activity of drainage reclamation systems, conservation of forest and meadow vegetation are suggested. Key words: average air temperature, regional warming, extreme air temperature, Southern Roztochia.

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