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J. Jaagus  - - - 
Top co-authors See all
Ü. Suursaar

10 shared publications

Toomas Tamm

9 shared publications

Hannes Tõnisson

7 shared publications

Institute of Ecology, Tallinn University

Reimo Rivis

4 shared publications

Institute of Ecology, Tallinn University

Urve Ratas

3 shared publications

Institute of Ecology, Tallinn University

11
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Publication Record
Distribution of Articles published per year 
(2000 - 2017)
Total number of journals
published in
 
10
 
Publications See all
Article 1 Read 0 Citations Trends and regime shifts in climatic conditions and river runoff in Estonia during 1951–2015 Jaak Jaagus, Mait Sepp, Toomas Tamm, Arvo Järvet, Kiira Mõis... Published: 03 November 2017
Earth System Dynamics, doi: 10.5194/esd-8-963-2017
DOI See at publisher website
ABS Show/hide abstract
T-test analysis of regime shifts). The results from Estonia are related to trends and regime shifts in time series of indices of large-scale atmospheric circulation. Annual mean air temperature has significantly increased at all 12 stations by 0.3–0.4 K decade−1. The warming trend was detected in all seasons but with the higher magnitude in spring and winter. Snow cover duration has decreased in Estonia by 3–4 days decade−1. Changes in precipitation are not clear and uniform due to their very high spatial and temporal variability. The most significant increase in precipitation was observed during the cold half-year, from November to March and also in June. A time series of specific runoff measured at 21 stations had significant seasonal changes during the study period. Winter values have increased by 0.4–0.9 L s−1 km−2 decade−1, while stronger changes are typical for western Estonia and weaker changes for eastern Estonia. At the same time, specific runoff in April and May have notably decreased indicating the shift of the runoff maximum to the earlier time, i.e. from April to March. Air temperature, precipitation, snow cover duration and specific runoff of rivers are highly correlated in winter determined by the large-scale atmospheric circulation. Correlation coefficients between the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO) indices reflecting the intensity of westerlies, and the studied variables were 0.5–0.8. The main result of the analysis of regime shifts was the detection of coherent shifts for air temperature, snow cover duration and specific runoff in the late 1980s, mostly since the winter of 1988/1989, which are, in turn, synchronous with the shifts in winter circulation. For example, runoff abruptly increased in January, February and March but decreased in April. Regime shifts in annual specific runoff correspond to the alternation of wet and dry periods. A dry period started in 1964 or 1963, a wet period in 1978 and the next dry period at the beginning of the 21st century.]]>
Article 1 Read 3 Citations How to quantify long-term changes in coastal sea storminess? Ü. Suursaar, J. Jaagus, H. Tõnisson Published: 01 April 2015
Estuarine, Coastal and Shelf Science, doi: 10.1016/j.ecss.2014.08.001
DOI See at publisher website
Article 0 Reads 0 Citations Low-level jet characteristics over the Arctic Ocean in spring and summer L. Jakobson, T. VIHMA, E. Jakobson, T. PALO, A. Männik, J. J... Published: 01 January 2013
Atmospheric Chemistry and Physics Discussions, doi: 10.5194/acpd-13-2125-2013
DOI See at publisher website
Article 0 Reads 3 Citations Low-level jet characteristics over the Arctic Ocean in spring and summer L. Jakobson, T. VIHMA, E. Jakobson, T. PALO, A. Männik, J. J... Published: 01 January 2013
Atmospheric Chemistry and Physics, doi: 10.5194/acp-13-11089-2013
DOI See at publisher website
Conference 1 Read 2 Citations Estimation of sea level rise and storm surge risks along the coast of Estonia, Baltic Sea – a tool for coastal managemen... Ü. Suursaar, J. Jaagus, T. Kullas, H. Tõnisson Published: 09 May 2011
Littoral 2010 – Adapting to Global Change at the Coast: Leadership, Innovation, and Investment, doi: 10.1051/litt/201112005
DOI See at publisher website
ABS Show/hide abstract
The aim of the paper is to present statistical analysis of the sea level data obtained from the Estonian coastal tide gauges over the period 1842–2009, to assess storm surge risks and to discuss climate change related mitigation and management issues in the coastal zone of Estonia. Long-term variations of both mean and extreme sea level values were studied in the Eastern section of the nearly tideless Baltic Sea. Influenced by postglacial land uplift, the series of relative sea level displayed slightly varying trends. The remarkably steep rise in annual maximum sea levels (2–12 mm/yr) could be explained by the local response to the changing regional wind climate. Due to its windward location, the sea level variations in the semi-enclosed study area are sensitive to the changes in cyclonic activity. Maximum value analysis revealed that in case of the south-westerly exposed Pärnu Bay, two storm surge events (253 in 1967 and 275 cm in 2005) were inconsistent with the theoretical distributions, which indicate that, in some locations, the most extreme sea level events are hardly predictable by means of return statistics. The parameters of maximum expected storm surges were estimated on the basis of hydrodynamic modelling.
BOOK-CHAPTER 0 Reads 4 Citations Natural Development and Human Activities on Saaremaa Island (Estonia) in the Context of Climate Change and Integrated Co... Are Kont, Jaak Jaagus, Kaarel Orviku, Valdeko Palginõmm, Urv... Published: 01 January 2011
Coastal Research Library, doi: 10.1007/978-94-007-0400-8_8
DOI See at publisher website