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Climatic Determinants of Changes in the Ice Regime of Carpathian Rivers

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15 mar 2025
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Fig. 1.

Study area and locations of measurement points.
Study area and locations of measurement points.

Fig. 2.

Number of days with ice cover (IC) at each station (top panel) and the ratio of the share of total ice cover (TIC) and border ice (BI) in the sum of days with ice cover (bottom panel).
Number of days with ice cover (IC) at each station (top panel) and the ratio of the share of total ice cover (TIC) and border ice (BI) in the sum of days with ice cover (bottom panel).

Fig. 3.

Moving averages (5-year window) of dates on the first and last days of ice cover occurrence (sums of total ice and border ice).
Moving averages (5-year window) of dates on the first and last days of ice cover occurrence (sums of total ice and border ice).

Fig. 4.

Time series of streamflow at selected stations filtered using the MASH method for the period 1980–2020.
Time series of streamflow at selected stations filtered using the MASH method for the period 1980–2020.

Trend (1980–2020) and percentage change in the number of days with ice cover during the period 2001–2020 compared to the period 1980–2000 by month_

Station code % change in 2001–2020 compared to 1980–2000 Trend [days per decade]
Nov Dec Jan Feb Mar Winter
H1 –94.9 –38.8 –23.5 –37.1 –30.0 –36.4 –11.1***
H2 –93.5 –30.3 –14.1 –25.2 –15.0 –25.8 –8.9**
H3 –54.3 0.7 16.6 5.0 15.7 4.9 –3.0
H4 –73.8 –9.6 4.4 –12.3 0.0 –7.0 –4.1
H5 –67.6 –5.3 –5.0 –14.9 –19.3 –13.1 –6.7*
H6 –84.5 –8.5 3.7 11.2 24.5 –0.6 –0.8
H7 –95.2 –28.1 2.8 –17.7 –1.4 –16.5 –5.0*
H8 –75.9 –29.8 –5.3 –34.5 –20.8 –25.4 –9.0***
H9 –96.6 –33.7 –8.7 –27.1 –42.7 –27.2 –8.5**
H10 –83.3 –24.9 –10.9 –21.8 –32.5 –23.0 –11.3***
H11 –80.7 5.9 –2.3 –29.2 –2.3 –14.2 –4.9
H12 –67.3 –23.4 –13.0 –29.8 –32.1 –27.0 –11.4***
H13 –61.0 –12.9 –5.9 –17.7 –39.5 –20.4 –9.6***

Trends in average air temperature over the period 1980–2020 in the study area_

Station code/dataset Trend [°C per decade]
Nov Dec Jan Feb Mar Winter
CRU-TS 0.76*** 0.40 0.21 0.63 0.62* 0.47**
C1 0.87*** 0.34 0.16 0.69 0.44 0.41*
C2 0.55** 0.26 0.10 0.61 0.23 0.31
C3 0.74** 0.40 0.21 0.68 0.24 0.40*
C4 0.71* 0.13 0.50 0.92* 0.40 0.47**
C5 0.79*** 0.19 0.23 0.64 0.21 0.37**
C6 0.85*** 0.43 0.44 0.67* 0.38 0.49**
C7 0.85*** 0.44 0.38 0.76* 0.26 0.49**

Trends in water temperature at gauging stations_

Station code Trend [°C per decade]
Nov Dec Jan Feb Mar Winter
H4 1.00*** 0.09 –0.06 0.00 0.03 0.22***
H5 0.76*** 0.47*** 0.22** 0.27** 0.39** 0.46***
H8 0.80*** 0.26* 0.06 0.16** 0.29* 0.34***
H9 0.85*** 0.37*** 0.04 0.10* 0.66*** 0.42***

Trends in discharge at gauging stations_

Station code Trend [m3 s−1 per decade]
Nov Dec Jan Feb Mar Winter
H1 0.80 0.19 0.45 1.33** 0.90 0.73**
H2 0.14 –0.15 0.05 0.72** 0.23 0.14
H3 0.15 –0.09 0.09 0.82 0.17 0.20
H4 0.13 –0.16 0.26 1.62** –0.31 0.11
H5 1.08* 0.11 0.47 1.17** 0.55 0.74**
H6 –0.01 –0.18 –0.22 0.32 –0.60 –0.23
H7 0.04 –0.17 –0.19 0.89** –0.65 –0.03
H8 0.04 0.02 –0.03 0.55** –0.28 0.03
H9 1.42 0.05 0.69 2.68** 1.10 1.24*
H10 1.14* 0.20 0.43 1.83*** 0.68 0.98**
H11 0.00 –0.25 0.15 0.82** –0.07 0.20
H12 0.23 –0.16 0.78* 0.93** 0.74 0.55*
H13 0.73 0.12 0.77* 1.53** 1.43* 1.09***
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Geoscienze, Geografia