Maximum winter temperature over Romania in connection to atmospheric circulation

Necula, Cristian; Stefan, Sabina; Birsan, Marius-Victor; Barbu, Nicu; Nita, Ion-Andrei

doi:10.1007/s00704-024-04854-5

Theor Appl Climatol

2024

DOI: 10.1007/s00704-024-04854-5

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Maximum winter temperature over Romania in connection to atmospheric circulation

Cristian Necula,

Sabina Stefan,

Marius-Victor Birsan

et al.

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Cited by 2 publications

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Comparative Analysis of Land and Air Temperature in Romania since A.D. 1961

Manea,

Birsan,

Dima

et al. 2024

Land

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Daily time series with continuous records of mean air and soil temperature from 127 meteorological stations—fairly distributed over the country—were used to compute monthly temperature trends, as well as changes in the timing of the first and the last frost days over Romania since 1961. Results show that the frequency of the number of days with daily temperature averages below 0 °C in case of air and soil surface temperature is stable for most months, except for January, when (for both soil and air temperature), the number of days with a temperature below 0 °C is decreasing in the majority of the stations. The occurrence of the first day with (mean air and soil surface) temperatures below 0 °C, presents a delay in the south, south-east, and west, and an earlier occurrence in eastern and central regions. The occurrence of the last day with a mean air and soil surface temperature below 0 °C shows a stable trend for most stations (except for some small areas in the north, south-east and south-west of Romania). The regime of the land temperature is more stable, due to the physical characteristics of the soil, compared to the more versatile atmosphere. Linkages between thermal parameters and large-scale atmospheric circulation are also discussed.

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Comparative Analysis of Land and Air Temperature in Romania since A.D. 1961

Manea,

Birsan,

Dima

et al. 2024

Land

View full text Add to dashboard Cite

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Influence of large-scale atmospheric circulation on Romanian snowpack duration

MARIUS-VICTOR,

ION-ANDREI,

VLAD-ALEXANDRU

2024

Rom. Rep. Phys.

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Daily data of snow depth from 104 meteorological stations across Romania were used to study the variability of snowpack for the period 1961-2010. The weather stations are fairly distributed over Romania (both spatially and with respect to elevation). Trend analysis was conducted with the Mann-Kendall nonparametric test, while the magnitude of the linear trend was estimated with the Theil-Sen method. The results show that the maximum snowpack duration is decreasing in the intra- Carpathian region of Romania, showing a clear spatial pattern. The signal is consistent and statistically significant. The influence of large-scale atmospheric circulation on continuous maximum snowpack duration in Romania was investigated using several teleconnection indices. We found statistically-significant negative correlations between winter East Atlantic and North Atlantic Oscillation patterns and the maximum continuous snowpack duration. Our findings are in agreement with recent studies on snow variability in the region, which point to a diminished snow / rain ratio since 1961.

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Maximum winter temperature over Romania in connection to atmospheric circulation

Cited by 2 publications

References 44 publications

Comparative Analysis of Land and Air Temperature in Romania since A.D. 1961

Comparative Analysis of Land and Air Temperature in Romania since A.D. 1961

Influence of large-scale atmospheric circulation on Romanian snowpack duration

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