Extreme rainfall and summer heat waves in Macau based on statistical theory of extreme values

2015 ◽  
Vol 66 (1) ◽  
pp. 91-101 ◽  
Author(s):  
W Wang ◽  
W Zhou ◽  
SK Fong ◽  
KC Leong ◽  
IM Tang ◽  
...  
Keyword(s):  
Statistical Theory ◽  
Extreme Values ◽  
Heat Waves ◽  
Extreme Rainfall ◽  
Summer Heat

scholarly journals Trends in Block-Seasonal Extreme Rainfall over the Iberian Peninsula in the Second Half of the Twentieth Century

2007 ◽  
Vol 20 (1) ◽  
pp. 113-130 ◽  
Author(s):  
JoséAgustín García ◽  
María Cruz Gallego ◽  
Antonio Serrano ◽  
JoséManuel Vaquero
Keyword(s):  
Twentieth Century ◽  
Statistical Theory ◽  
Iberian Peninsula ◽  
Extreme Values ◽  
Extreme Rainfall ◽  
Kendall Test ◽  
Time Dependent ◽  
The West ◽  
Daily Scale ◽  
Dipolar Pattern

Abstract In this study trends in extreme rainfall over the Iberian Peninsula at a daily scale in the second half of the twentieth century have been detected and analyzed. For this goal 35 stations evenly distributed over the region of study covering the period 1958–97 have been studied. Two different approaches have been used. The first one consists of the nonparametric Mann–Kendall test and the Sen method. The second approach is based on the statistical theory of extreme values, involving time-dependent parameters in order to be able to reflect possible temporal changes in the frequency distribution. Results from both methods agree, confirming the reliability of the analysis. Negative trends are found for the west and southwest of the Iberian Peninsula in spring and winter. In autumn a spatial dipolar pattern appears, but trends are not so evident.

scholarly journals Modeling Northern Hemisphere Summer Heat Extreme Changes and Their Uncertainties Using a Physics Ensemble of Climate Sensitivity Experiments

2006 ◽  
Vol 19 (17) ◽  
pp. 4418-4435 ◽  
Author(s):  
Robin T. Clark ◽  
Simon J. Brown ◽  
James M. Murphy
Keyword(s):  
Structural Changes ◽  
Heat Waves ◽  
Full Range ◽  
Daily Maximum ◽  
Model Parameters ◽  
Mean Values ◽  
Summer Heat ◽  
Modeling Uncertainties ◽  
Physics Ensemble ◽  
Projected Changes

Abstract Changes in extreme daily temperature events are examined using a perturbed physics ensemble of global model simulations under present-day and doubled CO2 climates where ensemble members differ in their representation of various physical processes. Modeling uncertainties are quantified by varying poorly constrained model parameters that control atmospheric processes and feedbacks and analyzing the ensemble spread of simulated changes. In general, uncertainty is up to 50% of projected changes in extreme heat events of the type that occur only once per year. Large changes are seen in distributions of daily maximum temperatures for June, July, and August with significant shifts to warmer conditions. Changes in extremely hot days are shown to be significantly larger than changes in mean values in some regions. The intensity, duration, and frequency of summer heat waves are expected to be substantially greater over all continents. The largest changes are found over Europe, North and South America, and East Asia. Reductions in soil moisture, number of wet days, and nocturnal cooling are identified as significant factors responsible for the changes. Although uncertainty associated with the magnitude of expected changes is large in places, it does not bring into question the sign or nature of the projected changes. Even with the most conservative simulations, hot extreme events are still expected to substantially increase in intensity, duration, and frequency. This ensemble, however, does not represent the full range of uncertainty associated with future projections; for example, the effects of multiple parameter perturbations are neglected, as are the effects of structural changes to the basic nature of the parameterization schemes in the model.

scholarly journals More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice

2020 ◽  
Vol 15 (7) ◽  
pp. 074011
Author(s):  
Kaiqiang Deng ◽  
Xingwen Jiang ◽  
Chundi Hu ◽  
Deliang Chen
Keyword(s):  
Sea Ice ◽  
Heat Waves ◽  
Arctic Sea Ice ◽  
Southwestern China ◽  
Summer Heat ◽  
Arctic Sea

scholarly journals Interactions between Convection and a Moist Vortex Associated with an Extreme Rainfall Event over Southern West Africa

2019 ◽  
Vol 147 (7) ◽  
pp. 2309-2328 ◽  
Author(s):  
Marlon Maranan ◽  
Andreas H. Fink ◽  
Peter Knippertz ◽  
Sabastine D. Francis ◽  
Aristide B. Akpo ◽  
...  
Keyword(s):  
West Africa ◽  
Extreme Values ◽  
Vortex Formation ◽  
Daily Rainfall ◽  
Extreme Rainfall ◽  
Squall Line ◽  
Convective System ◽  
Extreme Rainfall Event ◽  
Guinea Coast ◽  
Free Atmosphere

Abstract An intense mesoscale convective system (MCS) in the Guinea Coast region caused one of the highest ever recorded daily rainfall amounts at the Nigerian station Abakaliki on 12 June 2016 (223.5 mm). This paper provides a detailed analysis of the meso- and synoptic-scale factors leading to this event, including some so far undocumented dynamical aspects for southern West Africa. The MCS formed over the Darfur Mountains due to diurnal heating, then moved southwestward along a mid- to lower-tropospheric trough, and developed into a classical West African squall line in a highly sheared environment with pronounced midlevel dryness. Strong moisture flux convergence over Nigeria prior to the MCS passage led to extreme values in precipitable water and was caused by the formation of a local, short-lived heat low. According to the pressure tendency equation, the latter resulted from tropospheric warming due to MCS-forced subsidence as well as surface insolation in the resulting almost cloud-free atmosphere. In this extremely moist environment, the MCS strongly intensified and initiated the formation of a lower-tropospheric vortex, which resulted in a deceleration of the MCS and high rainfall accumulation at Abakaliki. Following the vorticity equation, the vortex formation was realized through strong low-level vortex stretching and upper-level vertical vorticity advection related to the MCS, which became “dynamically large” compared to the Rossby radius of deformation. Eventually, moisture supply and lifting associated with the vortex are suggested to promote the longevity of the MCS during the subsequent westward movement along the Guinea Coast.

Effect of the extreme summer heat waves on isolated populations of two orophitic plants in the north Apennines (Italy)

2012 ◽  
Vol 30 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Thomas Abeli ◽  
Graziano Rossi ◽  
Rodolfo Gentili ◽  
Maurizia Gandini ◽  
Andrea Mondoni ◽  
...  
Keyword(s):  
Heat Waves ◽  
Isolated Populations ◽  
The North ◽  
Summer Heat

scholarly journals Projected increase in the spatial extent of contiguous US summer heat waves and associated attributes

2019 ◽  
Vol 14 (11) ◽  
pp. 114029 ◽  
Author(s):  
Bradfield Lyon ◽  
Anthony G Barnston ◽  
Ethan Coffel ◽  
Radley M Horton
Keyword(s):  
Heat Waves ◽  
Spatial Extent ◽  
Summer Heat

scholarly journals Mental Health and Weather Extremes in a Southeastern U.S. City: Exploring Group Differences by Race

2020 ◽  
Vol 17 (10) ◽  
pp. 3411
Author(s):  
Lisa Reyes Mason ◽  
Bonita B. Sharma ◽  
Jayme E. Walters ◽  
Christine C. Ekenga
Keyword(s):  
Climate Change ◽  
Mental Health ◽  
Physical Health ◽  
Heat Waves ◽  
Sample Survey ◽  
Health Impacts ◽  
Health Concern ◽  
Winter Weather ◽  
Weather Extremes ◽  
Summer Heat

The connection between mental health and weather extremes is a public health concern, but less studied to date than physical health. This exploratory study examines the mental health impacts of two kinds of weather extremes increasingly linked to climate change—summer heat waves and extreme winter weather—in a low- to middle-income population in the Southeastern U.S. The distribution of mental health impacts, and potential pathways to them, are examined with a focus on race. Data are from a random-sample survey of 426 participants and are analyzed with bivariate statistics and path analysis. Self-reported mental health impacts, in both seasons, were common in our study, with White participants tending to report worse impacts than participants who identified with other racial groups. Physical health had direct effects on mental health across several models, overall and by racial group. For summer heat waves, concern about climate change and social cohesion had direct and indirect effects, respectively, on mental health in White participants only. For extreme winter weather, preparedness had a direct negative effect on mental health in White, but not Black, participants. Results suggest that there may be racial differences in the influence of human and social capital factors on mental health related to weather extremes, warranting further study of this critical topic and with larger racial subgroup samples.

scholarly journals Doubled length of western European summer heat waves since 1880

2007 ◽  
Vol 112 (D15) ◽  
Author(s):  
P. M. Della-Marta ◽  
M. R. Haylock ◽  
J. Luterbacher ◽  
H. Wanner
Keyword(s):  
Heat Waves ◽  
Summer Heat ◽  
Western European

scholarly journals Research Spotlight: Summer heat waves to be a routine occurrence

Eos ◽  
2010 ◽  
Vol 91 (38) ◽  
pp. 344-344
Author(s):  
Mohi Kumar ◽  
Leslie Ofori ◽  
Ernie Tretkoff
Keyword(s):  
Heat Waves ◽  
Summer Heat

scholarly journals Large scale and sub-regional connections in the lead up to summer heat wave and extreme rainfall events in eastern Australia

2014 ◽  
Vol 44 (7-8) ◽  
pp. 1823-1840 ◽  
Author(s):  
Ghyslaine Boschat ◽  
Alexandre Pezza ◽  
Ian Simmonds ◽  
Sarah Perkins ◽  
Tim Cowan ◽  
...  
Keyword(s):  
Heat Wave ◽  
Large Scale ◽  
Extreme Rainfall ◽  
Extreme Rainfall Events ◽  
Rainfall Events ◽  
Summer Heat ◽  
Eastern Australia
Sign in / Sign up

Export Citation Format

Share Document