Characteristics and development of European cyclones with tropical origin in reanalysis data

Dekker, Marcel; Haarsma, Reindert J.; Vries, Hylke de; Baatsen, Michiel; Delden, A.J. van

doi:10.1007/s00382-017-3619-8

Cited by 21 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Scientists at the Dutch national weather service warn that such storms, which can get considerably stronger than other types of storms in this area, may occur more often as the ocean warms by climate change (Haarsma et al ., ; Baatsen et al ., ; Dekker et al . ). Hence, present results on wind extremes only act as an illustration of their uncertainty, and interested readers are strongly advised to turn their attention to the dedicated literature referenced above.…”

Section: Anomalous Wind Events In Wind Atlasesmentioning

confidence: 97%

Quality of wind characteristics in recent wind atlases over the North Sea

Kalverla

Holtslag

Ronda

et al. 2020

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

Offshore wind energy production is rapidly growing as an essential element in the sustainable energy share. Wind energy siting studies require accurate wind data, and in particular the knowledge of extreme wind events (low-level jets, wind ramps, extreme shear and high wind speeds) is crucial for resource and load assessment. This study evaluates the skill of three relatively new wind atlases, i.e. ERA-5, DOWA and NEWA on the representation of extreme wind events using observations taken at the Met Mast IJmuiden over the North Sea.Overall, DOWA appears to best represent the wind speed profile with virtually no bias. ERA-5 underestimates the mean wind speed profile though the wind shear is well represented, while NEWA correctly represents the near surface wind but underestimates the wind shear. The frequency of low-level jets are also best represented by DOWA. Wind speed ramps and direction ramps are best represented by ERA-5, while DOWA appears to outperform the others concerning wind shear.

show abstract

Section: Anomalous Wind Events In Wind Atlasesmentioning

confidence: 97%

Quality of wind characteristics in recent wind atlases over the North Sea

Kalverla

Holtslag

Ronda

et al. 2020

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

show abstract

“…Dry intrusions are also an inegral part of the extratropical transition (ET) warm seclusion life cycle of cyclones (Dekker et al. 2018), and are associated with frontogenesis during the re-intensification phase of an ET of a typhoon (Zhu et al. 2018).…”

Section: Introductionmentioning

confidence: 99%

Climatology and dynamics of the link between dry intrusions and cold fronts during winter, Part II: Front-centred perspective

Raveh‐Rubin

Catto

2019

Clim Dyn

View full text Add to dashboard Cite

The conceptual picture of an extratropical cyclone typically includes a cold front and a dry intrusion (DI) behind it. By objectively identifying fronts and DIs in ECMWF ERA-Interim data for 1979–2014, Part I quantified the climatological relationship between cold fronts and DIs. Driven by the finding that front intensity and frontal precipitation are enhanced in the presence of DIs, here we employ a front-centred perspective to focus on the dynamical and thermodynamical environment of cold fronts with and without DIs in the Northern Hemisphere winter. Distinguishing between trailing fronts (that connect to a parent cyclone) and isolated fronts, examples of DIs behind each type illustrate the baroclinic environment of the trailing front, and the lack of strong temperature gradients across the isolated front. Composite analyses of North Atlantic and North Pacific fronts outline the major differences in the presence of DIs, compared to similar fronts but without DIs in their vicinity. The magnitude and spatial structure of the modification by DIs depends on the front intensity. Yet, generally with DIs, trailing fronts occur with stronger SLP dipole, deeper upper-tropospheric trough, stronger 10-m wind gusts, enhanced ocean sensible and latent heat fluxes in the cyclone cold sector and heavier precipitation. Isolated weak fronts exhibit similar behaviour, with different spatial structure. This study highlights the central role of DIs for shaping the variability of fronts and their associated environment and impact. Electronic supplementary material The online version of this article (10.1007/s00382-019-04793-2) contains supplementary material, which is available to authorized users.

show abstract

“…In 2017, Ophelia set a record for the easternmost Atlantic major hurricane. Scientists at the Dutch national weather service warn that such storms, which can get considerably stronger than other types of storms in this area, may occur more often as the ocean warms by climate change (Haarsma et al, 2013;Baatsen et al, 2015;Dekker et al 2018). Hence, present results on…”

Section: Wind Extremesmentioning

confidence: 83%

Quality of wind characteristics in recent wind atlases over the North Sea

Kalverla

Holtslag

Ronda

et al. 2020

Preprint

View full text Add to dashboard Cite

Many wind energy applications rely on engineering models that simulate the interaction between the wind and the turbine(s). These models often represent the wind in an idealised fashion, which introduces uncertainties that translate into financial risk for investors.Over the past four years, we investigated these uncertainties by re-evaluating common assumptions about the (offshore) wind field, studying the physics that govern winds in coastal areas, evaluating the representation of offshore winds in weather models, and proposing alternative methods to represent the offshore wind climate in engineering models.Uncertainties in the wind climate were studied through a number of &#8216;anomalous wind events&#8217;. An important and illustrative example is the low-level jet, which can substantially impact power production and wind loads on the turbine. We found that low-level jets occur often over the North Sea. Moreover, numerical weather prediction models struggle to adequately represent this phenomenon. A climatology based only on observations is also biased, because the observations are limited in time and space. Thus, we combined field observations with output of reanalysis products to obtain a reliable climatology.At the 2020 general assembly, we will present a new evaluation of three recent wind atlases over the North Sea: ERA5, The New European Wind Atlas (NEWA), and the Dutch Offshore Wind Atals (DOWA). With virtually no bias, DOWA outperforms the other datasets in terms of the mean wind profile and also in the representation of wind shear. The high resolution offered by DOWA (2.5 km) and NEWA (3 km) leads to substantial improvements in the frequency and the level of detail with which low-level jets are captured. However, the timing of the events is a bit off in NEWA. By contrast, DOWA was produced using continuous three-hourly data-assimilation updates, which imposes a much stronger constraint on the simulations. Consequently, the timing of low-level jets in DOWA is much better represented. This makes for a low-level jet climatology with unprecedented accuracy and detail, facilitating resource assessment and future studies on the characteristics of the offshore wind climate.

show abstract

Characteristics and development of European cyclones with tropical origin in reanalysis data

Cited by 21 publications

References 15 publications

Quality of wind characteristics in recent wind atlases over the North Sea

Quality of wind characteristics in recent wind atlases over the North Sea

Climatology and dynamics of the link between dry intrusions and cold fronts during winter, Part II: Front-centred perspective

Quality of wind characteristics in recent wind atlases over the North Sea

Contact Info

Product

Resources

About