scholarly journals Effects of interactive vegetation phenology on the 2003 summer heat waves

2012 ◽  
Vol 117 (D24) ◽  
pp. n/a-n/a ◽  
Author(s):  
Marc Stéfanon ◽  
Philippe Drobinski ◽  
Fabio D'Andrea ◽  
Nathalie de Noblet-Ducoudré
Keyword(s):  
Heat Waves ◽  
Vegetation Phenology ◽  
Summer Heat

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

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 Summer heat waves over western Europe 1880–2003, their relationship to large-scale forcings and predictability

2007 ◽  
Vol 29 (2-3) ◽  
pp. 251-275 ◽  
Author(s):  
P. M. Della-Marta ◽  
J. Luterbacher ◽  
H. von Weissenfluh ◽  
E. Xoplaki ◽  
M. Brunet ◽  
...  
Keyword(s):  
Large Scale ◽  
Western Europe ◽  
Heat Waves ◽  
Summer Heat

scholarly journals Severe summer heat waves over Georgia: trends, patterns and driving forces

2015 ◽  
Vol 6 (2) ◽  
pp. 2273-2322 ◽  
Author(s):  
I. Keggenhoff ◽  
M. Elizbarashvili ◽  
L. King
Keyword(s):  
Soil Moisture ◽  
Heat Wave ◽  
Driving Forces ◽  
Heat Waves ◽  
Longwave Radiation ◽  
Meridional Wind ◽  
Surface Heating ◽  
Ural Mountains ◽  
Summer Heat ◽  
Excess Heat Factor

Abstract. During the last 50 years Georgia experienced a rising number of severe summer heat waves causing increasing heat-health impacts. In this study, the 10 most severe heat waves between 1961 and 2010 and recent changes in heat wave characteristics have been detected from 22 homogenized temperature minimum and maximum series using the Excess Heat Factor (EHF). A composite and Canonical Correlation Analysis (CCA) have been performed to study summer heat wave patterns and their relationships to the selected predictors: mean Sea Level Pressure (SLP), Geopotential Height at 500 mb (Z500), Sea Surface Temperature (SST), Zonal (u-wind500) and Meridional Wind at 500 mb (v-wind500), Vertical Velocity at 500 mb (O500), Outgoing Longwave Radiation (OLR), Relative Humidity (RH500), Precipitation (RR) and Soil Moisture (SM). Most severe heat events during the last 50 years are identified in 2007, 2006 and 1998. Largest significant trend magnitudes for the number, intensity and duration of low and high-impact heat waves have been found during the last 30 years. Significant changes in the heat wave predictors reveal that all relevant surface and atmospheric patterns contributing to heat waves have been intensified between 1961 and 2010. Composite anomalies and CCA patterns provide evidence of a large anticyclonic blocking pattern over the southern Ural Mountains, which attracts warm air masses from the Southwest, enhances subsidence and surface heating, shifts the African Intertropical Convergence Zone (ITCZ) northwards, and causes a northward shift of the subtropical jet. Moreover, pronounced precipitation and soil moisture deficiency throughout Georgia contribute to the heat wave formation and persistence over Georgia. Due to different large- to mesoscale circulation patterns and the local terrain, heat wave effects over Eastern Georgia are dominated by subsidence and surface heating, while convective rainfall and cooling are observed in the West.

scholarly journals Dominant Modes of China Summer Heat Waves Driven by Global Sea Surface Temperature and Atmospheric Internal Variability

2019 ◽  
Vol 32 (12) ◽  
pp. 3761-3775 ◽  
Author(s):  
Kaiqiang Deng ◽  
Song Yang ◽  
Mingfang Ting ◽  
Ping Zhao ◽  
Zunya Wang
Keyword(s):  
North Atlantic ◽  
High Pressures ◽  
Heat Waves ◽  
Southern China ◽  
Wave Train ◽  
Internal Variability ◽  
Northwest Pacific ◽  
The North ◽  
Summer Heat ◽  
The North Atlantic

AbstractThis study applies the maximum temperatures at more than 2000 Chinese stations to investigate the dominant modes of China summer heat waves (HWs). The first empirical orthogonal function (EOF) mode of the HW days reflects an increased frequency of HWs in northern China (NC), while the second and third modes represent two distinct interannual modes, with key regions over the Yangtze River valley (YRV) and southern China (SC), respectively. The NC HWs are possibly associated with the Atlantic–Eurasian teleconnection, showing zonally propagating wave trains over the North Atlantic and Eurasian continent. The YRV HWs are proposed to be linked to the North Atlantic Oscillation, which may trigger a southeastward-propagating wave train over northern Russia and East Asia that results in a high pressure anomaly over the YRV. The SC HWs are obviously dominated by the Indian Ocean and northwest Pacific warm SSTs owing to the transition from the preceding El Niño to La Niña, which excites above-normal highs over SC. The anomalously high pressures over NC, the YRV, and SC are usually accompanied by descending air motions, clear skies, decreased precipitation, and increased solar radiation, which jointly cause a drier and hotter soil condition that favors the emergence of HWs. The GFDL HiRAM experiments are able to reproduce the historical evolution of NC and SC HWs, but fail to capture the YRV HWs. The correlation coefficient between model PC1 (PC2) and observed PC1 (PC3) for the period of 1979–2008 is 0.65 (0.38), which significantly exceeds the 95% (90%) confidence level, indicating that this model has a more faithful representation for the SST-forced HWs.

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