Interactions between the Caspian Sea size (level) and atmospheric circulation

Molavi-Arabshahi, Mahboubeh; Arpe, Klaus

doi:10.1002/joc.7852

Cited by 3 publications

(2 citation statements)

References 40 publications

(87 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, extensive research has been conducted to comprehend the impact of ENSO and IOD on various oceanic phenomena apart from MHWs. Noteworthy studies on ENSO [41,42] have yielded valuable insights into its influence on Caspian seawater levels. While primarily focusing on the interaction between ENSO and sea level fluctuations, these investigations offer significant implications for understanding of the broader impacts of ENSO on oceanic processes.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Marine Heatwaves in the Indonesian Waters during the PDO, ENSO, and IOD Phases and Their Relationships to Net Surface Heat Flux

et al. 2023

View full text Add to dashboard Cite

We conducted an investigation into the characteristics of marine heatwaves (MHWs) in Indonesian waters, aiming to understand the underlying mechanisms responsible for their formation, particularly the ones generated by net surface heat flux. To accomplish this, we utilized remote sensing data from the National Oceanic and Atmospheric Administration and the European Centre for Medium-Range Weather Forecasts. The dataset covered a 40-year period (1982–2021) encompassing both warm (1982–2007) and cold (2008–2021) phases of the Pacific Decadal Oscillation (PDO). Statistical analysis methods were employed to process the data. Our study reveals significant findings regarding MHWs in Indonesian waters. We observed the highest average frequency and maximum intensity of MHWs, occurring approximately 2–3 times a year and exceeding 1.5 °C, respectively, during the warm phase of PDO (with El Niño events occurring more frequently than La Niña). Conversely, the longest durations of MHWs in Indonesian waters were recorded during the cold phase of PDO (with La Niña events occurring more frequently than El Niño), spanning approximately 7–15 days. We identified local forcing in the form of net surface heat flux as the primary driver of MHW frequency and maximum intensity. During the warm phase of PDO, the net surface heat flux was notably higher, primarily due to increased shortwave radiation (heat gain) and reduced latent heat flux (heat loss) through the evaporation process. These factors collectively contributed to maintaining warmer ocean temperatures. Moreover, our study provides valuable insights into the interannual variability of MHWs through the application of composite calculations. We discovered a strong correlation between the occurrence of El Niño and positive Indian Ocean Dipole (IOD) events during the warm PDO phase and the highest frequency and maximum intensity of MHWs, with approximately 2.52 events and 1.54 °C, respectively. In contrast, we found that MHWs with the longest durations were closely linked to La Niña and negative IOD events during the cold PDO phase, lasting approximately 10.90 days. These findings highlight the complex interplay between climate phenomena and MHW characteristics, further deepening our understanding of their dynamics.

show abstract

Section: Introductionmentioning

confidence: 99%

Characteristics of Marine Heatwaves in the Indonesian Waters during the PDO, ENSO, and IOD Phases and Their Relationships to Net Surface Heat Flux

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The Caspian Sea has an inconstancy in its level, the amplitude of which varied within 4 meters during the period of instrumental observations [3]. Most researchers explain this phenomenon by climatic conditions changes, which are overlapped by anthropogenic factors [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Storm Surges and Extreme Wind Waves in the Caspian Sea in the Present and Future Climate

Pavlova

Myslenkov²,

Архипкин³

et al. 2022

Civ Eng J

View full text Add to dashboard Cite

The Caspian Sea is of particular interest. Against the background of long-term sea level changes, low-lying coastal areas in the northern part are subject to constant flooding as a result of storm surges. The elongation of the sea in the meridional direction allows the development of strong waves in the middle and southern parts. A comprehensive understanding of the characteristics of storm surges and storm waves is especially important in the context of ongoing climate change. This study is devoted to the analysis of storm surges for the time period from 1979 up to 2017 and wind waves from 1979 to 2020 in the Caspian Sea region. The circulation model ADCIRC and the wave model WAVEWATCH III with wind and pressure forcing from the NCEP/CFSR reanalysis were used. The modeling is performed on different unstructured grids with spacings of 500–900 m in the coastal zone. Mean and extreme values of surges, wave parameters and storm activity are provided in the research. The maximum significant wave height for the whole period was 8.2 m. The average long-term SWH did not exceed 1.1 m. No significant trends in the storm activity were found. The maximum surge height was 2.7 m. The analysis of the interannual variability of the surges' occurrence showed that 7–10 surges with a height of more than 1 meter were detected every year. The total duration of these surges was 20–30 days per year. Assessment of the risks of coastal flooding was carried out by calculating the extreme values of the sea for different return periods: 5, 10, 25, 50, and 100 years. The extreme sea level values in the northern part of the Caspian Sea for the 100-year return period are close to 3 m, and the areas with big surges are located along the eastern and western coasts. A forecast is made for the recurrence of storm wind waves in the 21st century based on climatic scenarios in CMIP5. A statistically significant increase in the recurrence of storm waves is to be expected in the near future, but that increase is not severe. Doi: 10.28991/CEJ-2022-08-11-01 Full Text: PDF

show abstract

Caspian Sea level changes during instrumental period, its impact and forecast: A review

Lahijani

Leroy

Arpe

et al. 2023

Earth-Science Reviews

View full text Add to dashboard Cite

Interactions between the Caspian Sea size (level) and atmospheric circulation

Cited by 3 publications

References 40 publications

Characteristics of Marine Heatwaves in the Indonesian Waters during the PDO, ENSO, and IOD Phases and Their Relationships to Net Surface Heat Flux

Characteristics of Marine Heatwaves in the Indonesian Waters during the PDO, ENSO, and IOD Phases and Their Relationships to Net Surface Heat Flux

Storm Surges and Extreme Wind Waves in the Caspian Sea in the Present and Future Climate

Caspian Sea level changes during instrumental period, its impact and forecast: A review

Contact Info

Product

Resources

About