THE INFLUENCE OF SEASONAL TEMPERATURE VARIABILITY ON SURVIVAL DURING BACKGROUND AND MASS EXTINCTIONS

2018 ◽  
Author(s):  
Matthew E. Clapham ◽  
◽  
Sarah E. Greene ◽  
Alexander Farnsworth ◽  
Dan J. Lunt ◽  
...  
Keyword(s):  
Temperature Variability ◽  
Seasonal Temperature ◽  
Mass Extinctions

An Assessment of Observed and Simulated Temperature Variability in Sierra de Guadarrama (Spain)

2021 ◽  
Author(s):  
Cristina Vegas Cañas ◽  
J. Fidel González Rouco ◽  
Jorge Navarro Montesinos ◽  
Elena García Bustamante ◽  
Etor E. Lucio Eceiza ◽  
...  
Keyword(s):  
Western Europe ◽  
Climate Model ◽  
Regional Climate ◽  
Monitoring Network ◽  
Horizontal Resolution ◽  
Temperature Variability ◽  
Added Value ◽  
Seasonal Temperature ◽  
Temperature Trends ◽  
Highly Correlated

<p>This work provides a first assessment of temperature variability from interannual to multidecadal timescales in Sierra de Guadarrama, located in central Spain, from observations and regional climate model (RCM) simulations. Observational data are provided by the Guadarrama Monitoring Network (GuMNet; www.ucm.es/gumnet) at higher altitudes, up to 2225 masl, and by the Spanish Meteorological Agency (AEMet) at lower sites. An experiment at high horizontal resolution of 1 km using the Weather Research and Forecasting (WRF) RCM, feeding from ERA Interim inputs, is used. Through model-data comparison, it is shown that the simulations are annually and seasonally highly representative of the observations, although there is a tendency in the model to underestimate observational temperatures, mostly at high altitudes. Results show that WRF provides an added value in relation to the reanalysis, with improved correlation and error metrics relative to observations.</p><p>The analysis of temperature trends shows a warming in the area during the last 20 years, very significant in autumn. When spanning the analysis to the whole observational period, back to the beginning of the 20th century at some sites, significant annual and seasonal temperature increases of 1℃/decade develop, most of them happening during de 1970s, although not as intense as during the last 20 years.</p><p>The temporal variability of temperature anomalies in the Sierra de Guadarrama is highly correlated with the temperatures in the interior of the Iberian Peninsula. This relationship can be extended broadly over south-western Europe.</p>

scholarly journals Seasonal temperature variability and emergency hospital admissions for respiratory diseases: a population-based cohort study

Thorax ◽  
2018 ◽  
Vol 73 (10) ◽  
pp. 951-958 ◽  
Author(s):  
Shengzhi Sun ◽  
Francine Laden ◽  
Jaime E Hart ◽  
Hong Qiu ◽  
Yan Wang ◽  
...  
Keyword(s):  
Respiratory Diseases ◽  
Hospital Admissions ◽  
Temperature Variability ◽  
Seasonal Temperature ◽  
Short Term ◽  
Emergency Hospital ◽  
Emergency Hospital Admissions ◽  
Mean Temperature

BackgroundClimate change increases global mean temperature and changes short-term (eg, diurnal) and long-term (eg, intraseasonal) temperature variability. Numerous studies have shown that mean temperature and short-term temperature variability are both associated with increased respiratory morbidity or mortality. However, data on the impact of long-term temperature variability are sparse.ObjectiveWe aimed to assess the association of intraseasonal temperature variability with respiratory disease hospitalisations among elders.MethodsWe ascertained the first occurrence of emergency hospital admissions for respiratory diseases in a prospective Chinese elderly cohort of 66 820 older people (≥65 years) with 10–13 years of follow-up. We used an ordinary kriging method based on 22 weather monitoring stations in Hong Kong to spatially interpolate daily ambient temperature for each participant’s residential address. Seasonal temperature variability was defined as the SD of daily mean summer (June–August) or winter (December–February) temperatures. We applied Cox proportional hazards regression with time-varying exposure of seasonal temperature variability to respiratory admissions.ResultsDuring the follow-up time, we ascertained 12 689 cases of incident respiratory diseases, of which 6672 were pneumonia and 3075 were COPD. The HRs per 1°C increase in wintertime temperature variability were 1.20 (95% CI 1.08 to 1.32), 1.15 (1.01 to 1.31) and 1.41 (1.15 to 1.71) for total respiratory diseases, pneumonia and COPD, respectively. The associations were not statistically significant for summertime temperature variability.ConclusionWintertime temperature variability was associated with higher risk of incident respiratory diseases.

scholarly journals Reconstruction of seasonal temperature variability in the tropical Pacific Ocean from the shell of the scallop, Comptopallium radula

2007 ◽  
Vol 71 (4) ◽  
pp. 918-928 ◽  
Author(s):  
Julien Thébault ◽  
Laurent Chauvaud ◽  
Jacques Clavier ◽  
Jennifer Guarini ◽  
Robert B. Dunbar ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Tropical Pacific ◽  
Temperature Variability ◽  
Seasonal Temperature ◽  
Tropical Pacific Ocean ◽  
The Tropical Pacific

Late Holocene seasonal temperature variability of the western Scottish shelf (St Kilda) recorded in fossil shells of the bivalve Glycymeris glycymeris

2021 ◽  
Vol 562 ◽  
pp. 110146
Author(s):  
Stella J. Alexandroff ◽  
Paul G. Butler ◽  
Philip R. Hollyman ◽  
Bernd R. Schöne ◽  
James D. Scourse
Keyword(s):  
Late Holocene ◽  
Temperature Variability ◽  
Seasonal Temperature

Seasonal temperature variability during the past 1600 years recorded in historical documents and varved lake sediment profiles from northeastern China

The Holocene ◽  
2011 ◽  
Vol 22 (7) ◽  
pp. 785-792 ◽  
Author(s):  
Guoqiang Chu ◽  
Qing Sun ◽  
Xiaohua Wang ◽  
Meimei Liu ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Temperature Reconstruction ◽  
Northeastern China ◽  
Temperature Variability ◽  
Ice Age ◽  
Historical Documents ◽  
Seasonal Temperature ◽  
Warm Winter ◽  
The Past ◽  
Time Period ◽  
Extreme Cold

Seasonal temperature variability over longer timescales could offer new insights into understanding different forcing factors and response processes in the climate system. Here we report an alkenone-based temperature reconstruction for growing season over the past 1600 years from the varved sediment in Lake Sihailongwan, northeastern China. The most notable cold spells occurred during the periods ad 480–860, ad 1260–1300, ad 1510–1570 and ad 1800–1900 with a temperature decrease of about 1°C compared with the 20th century. Based on the historical evidence such as ‘snow or frost in the summertime’ and ‘no ice during the wintertime’, we compile extreme cold summer events and warm winter events over the past 1600 years. The ‘Little Ice Age’ time period experienced more extreme cold summer/warm winter events, while the ‘Medieval Warm Period’ had milder winters. Comparatively, the natural proxy data show a general similar pattern with historical documents at decadal time scales, except for between ad 1620 and 1720. Our results show multidecadal to centennial variations in seasonal temperature, possibly caused by interactions of external natural forcing and atmosphere–ocean circulations.

scholarly journals Detection of annual and seasonal temperature variability and change using non-parametric test- A case study of Bundelkhand region of central India

2021 ◽  
Vol 23 (4) ◽  
pp. 402-408
Author(s):  
SUCHIT K. RAI ◽  
SUNIL KUMAR ◽  
MANOJ CHAUDHARY
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Monsoon Season ◽  
Economic Status ◽  
Winter Season ◽  
Central India ◽  
Warming Trend ◽  
Temperature Variability ◽  
Seasonal Temperature ◽  
Economic Activities

Consequences of global warming and climate change are major threat to humans and their socio-economic activities. Agriculture of Bundelkhand region is supposed to be more vulnerable due to emerging scenario of climate change and poor socio-economic status of farming community. Many studies carried out elsewhere have shown evidence of regional temperature variability along with global climate changes. This study focuses on the temporal variability and trend in annual and seasonal temperature (1901-2012) at six locations of Bundelkhand region. The results of the analysis reveal that the annual maximum (TMax) and minimum (TMin) temperature has significantly increasing trend in all the locations in the range of 0.5 to 2.0oC 100 year-1 and 0.5 to 1.1 oC 100 year-1, respectively. Seasonal analysis revealed warming trend in both TMax (0.6-2.6oC100 year-1) and TMin (0.9 to 2.3 oC 100 year-1) during post-monsoon and winter season in all the locations. Majority of the locations showed cooling trend (0.3-1.0 oC 100 year-1), in the mean maximum and minimum temperature during monsoon season except at two locations i.e Jhansi and Banda. However, a significant positive trends (2.9 oC) in the TMin was found for the period of hundred years at Banda district during monsoon season.

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