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https://www.readbyqxmd.com/read/29745137/-temporal-and-spatial-variations-of-extreme-climatic-events-in-songnen-grassland-northeast-china-during-1960-2014
#1
Qi Yun Ma, Ji Quan Zhang, Quan Lai, Feng Zhang, Zhen Hua Dong, Lu Si A
Fourteen extreme climatic indices related with main regional meteorological disasters and vegetation growth were calculated based on daily data from 13 meteorological stations during 1960-2014 in Songnen Grassland, Northeast China. Then, the variation trend and the spatial and temporal patterns of climatic extreme events were analyzed by using regression analysis, break trend analy-sis, Mann-Kendall test, Sen's slope estimator and moving t-test method. The results indicated that summer days (SU25), warm days (TX90P), warm nights (TN90P) and warm spell duration (WSDI) representing extremely high temperatures showed significant increasing trends (P<0...
June 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29694355/future-climate-change-scenarios-in-central-america-at-high-spatial-resolution
#2
Pablo Imbach, Sin Chan Chou, André Lyra, Daniela Rodrigues, Daniel Rodriguez, Dragan Latinovic, Gracielle Siqueira, Adan Silva, Lucas Garofolo, Selena Georgiou
The objective of this work is to assess the downscaling projections of climate change over Central America at 8-km resolution using the Eta Regional Climate Model, driven by the HadGEM2-ES simulations of RCP4.5 emission scenario. The narrow characteristic of continent supports the use of numerical simulations at very high-horizontal resolution. Prior to assessing climate change, the 30-year baseline period 1961-1990 is evaluated against different sources of observations of precipitation and temperature. The mean seasonal precipitation and temperature distribution show reasonable agreement with observations...
2018: PloS One
https://www.readbyqxmd.com/read/29688561/integrative-transcriptional-and-metabolic-analyses-provide-insights-into-cold-spell-response-mechanisms-in-young-shoots-of-the-tea-plant
#3
Xinyuan Hao, Hu Tang, Bo Wang, Chuan Yue, Lu Wang, Jianming Zeng, Yajun Yang, Xinchao Wang
Green tea has attracted an increasing number of consumers worldwide due to its multiple health benefits. With the increase in global warming, more frequent cold spells in the spring often cause more serious damage to green tea production because of the young leaves used. We recorded the changes in climatic conditions during a typical cold spell and the damage symptoms caused by the cold spell in different tea cultivars and breeding lines. By simulating the low temperature of a cold spell under controlled conditions, comparative transcriptome and metabolic analyses were performed with sprouting shoots...
April 23, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29679776/temporal-changes-in-mortality-impacts-of-heat-wave-and-cold-spell-in-korea-and-japan
#4
Whanhee Lee, Hayon Michelle Choi, Jae Young Lee, Da Hye Kim, Yasushi Honda, Ho Kim
Investigating how well people adapt to heat waves and cold spells has been an important issue under climate change. Also, most of previous studies focused only on the mortality risks for heat waves or cold spells for certain time period not considering its temporal changes and increasing frequencies. This study investigated the change in risks of mortality from heat waves and cold spells over time, and estimated the temporal changes in mortality burden attributed to heat waves and cold spells in Korea and Japan...
April 18, 2018: Environment International
https://www.readbyqxmd.com/read/29667035/hatching-delays-in-great-tits-and-blue-tits-in-response-to-an-extreme-cold-spell-a-long-term-study
#5
Michał Glądalski, Mirosława Bańbura, Adam Kaliński, Marcin Markowski, Joanna Skwarska, Jarosław Wawrzyniak, Piotr Zieliński, Jerzy Bańbura
Variation in ambient temperature affects various life stages of organisms. It has been suggested that climate change not only implies higher global temperatures but also more unpredictable weather and more frequent extreme weather events. Temperature has a major influence on the optimal laying-incubation-hatching dates of insectivorous passerines, because it poses energetic constraints and affects the timing of food abundance. We have been studying breeding characteristics of great tits Parus major and blue tits Cyanistes caeruleus in two areas, an urban parkland and a deciduous forest, around the city of Łódź since 2002...
April 17, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29614613/-estimating-and-projecting-the-acute-effect-of-cold-spells-on-excess-mortality-under-climate-change-in-guangzhou
#6
Q H Sun, W T Wang, Y W Wang, T T Li
Objective: To estimate future excess mortality attributable to cold spells in Guangzhou, China. Methods: We collected the mortality data and metrological data from 2009-2013 of Guangzhou to calculated the association between cold spell days and non-accidental mortality with GLM model. Then we projected future daily average temperatures (2020-2039 (2020s) , 2050-2069 (2050s) , 2080-2099 (2080s) ) with 5 GCMs models and 2 RCPs (RCP4.5 and RCP8.5) to identify cold spell days. The baseline period was the 1980s (1980-1999)...
April 6, 2018: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/29554882/pre-industrial-plague-transmission-is-mediated-by-the-synergistic-effect-of-temperature-and-aridity-index
#7
Ricci P H Yue, Harry F Lee
BACKGROUND: Although the linkage between climate change and plague transmission has been proposed in previous studies, the dominant approach has been to address the linkage with traditional statistical methods, while the possible non-linearity, non-stationarity and low frequency domain of the linkage has not been fully considered. We seek to address the above issue by investigating plague transmission in pre-industrial Europe (AD1347-1760) at both continental and country levels. METHODS: We apply Granger Causality Analysis to identify the casual relationship between climatic variables and plague outbreaks...
March 20, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29535297/warm-arctic-episodes-linked-with-increased-frequency-of-extreme-winter-weather-in-the-united-states
#8
Judah Cohen, Karl Pfeiffer, Jennifer A Francis
Recent boreal winters have exhibited a large-scale seesaw temperature pattern characterized by an unusually warm Arctic and cold continents. Whether there is any physical link between Arctic variability and Northern Hemisphere (NH) extreme weather is an active area of research. Using a recently developed index of severe winter weather, we show that the occurrence of severe winter weather in the United States is significantly related to anomalies in pan-Arctic geopotential heights and temperatures. As the Arctic transitions from a relatively cold state to a warmer one, the frequency of severe winter weather in mid-latitudes increases through the transition...
March 13, 2018: Nature Communications
https://www.readbyqxmd.com/read/29197279/trends-in-the-consecutive-days-of-temperature-and-precipitation-extremes-in-china-during-1961-2015
#9
Jun Shi, Linli Cui, Kangmin Wen, Zhan Tian, Peipei Wei, Bowen Zhang
BACKGROUND AND AIMS: Consecutive climatic extremes have more intense impacts on natural ecosystems and human activities than occasional events. There were many studies about the frequency or intensity of extreme weather events, but few focused on the consecutiveness or continuousness of climatic extremes. We analyzed the temporal and spatial distributions and tendencies in the consecutive temperature and precipitation extremes in China during 1961-2015. METHODS: Daily temperature and precipitation data at 1867 meteorological stations over China was used and four consecutive indices of climate extremes, i...
February 2018: Environmental Research
https://www.readbyqxmd.com/read/29138934/habitat-quality-affects-stress-responses-and-survival-in-a-bird-wintering-under-extremely-low-ambient-temperatures
#10
Dina Cīrule, Tatjana Krama, Ronalds Krams, Didzis Elferts, Ants Kaasik, Markus J Rantala, Pranas Mierauskas, Severi Luoto, Indrikis A Krams
Animals normally respond to stressful environmental stimuli by releasing glucocorticoid hormones. We investigated whether baseline corticosterone (CORT), handling-induced corticosterone concentration(s), and body condition indices of members of willow tit (Poecile montanus) groups differed while wintering in old growth forests and managed young forests in mild weather conditions and during cold spells. Willow tits spend the winter season in non-kin groups in which dominant individuals typically claim their priority to access resources, while subordinate individuals may experience greater levels of stress and higher mortality, especially during cold spells...
November 14, 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/29127226/risk-of-sudden-cardiac-death-in-relation-to-season-specific-cold-spells-a-case-crossover-study-in-finland
#11
Niilo R I Ryti, Elina M S Mäkikyrö, Harri Antikainen, Eeva Hookana, M Juhani Junttila, Tiina M Ikäheimo, Marja-Leena Kortelainen, Heikki V Huikuri, Jouni J K Jaakkola
OBJECTIVE: To test a priori hypothesis of an association between season-specific cold spells and sudden cardiac death (SCD). METHODS: We conducted a case-crossover study of 3614 autopsy-verified cases of SCD in the Province of Oulu, Finland (1998-2011). Cold spell was statistically defined by applying an individual frequency distribution of daily temperatures at the home address during the hazard period (7 days preceding death) and 50 reference periods (same calendar days of other years) for each case using the home coordinates...
November 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28923709/the-impact-of-heat-waves-and-cold-spells-on-respiratory-emergency-department-visits-in-beijing-china
#12
Xuping Song, Shigong Wang, Tanshi Li, Jinhui Tian, Guowu Ding, Jiaxin Wang, Jiexin Wang, Kezheng Shang
The objectives of this article were (i) to find the association between extreme temperatures and respiratory emergency department (ED) visits and (ii) to explore the added effects of heat waves and cold spells on respiratory ED visits in Beijing from 2009 to 2012. A quasi-Poisson generalised linear model combined with a distributed lag non-linear model was performed to quantify this association. The results indicated that (i) ambient temperature related to respiratory ED visits exhibited a U-shaped association...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28737248/frost-hardening-and-dehardening-potential-in-temperate-trees-from-winter-to-budburst
#13
Amarante Vitra, Armando Lenz, Yann Vitasse
We investigated how deciduous trees can adjust their freezing resistance in response to temperature during the progress of the ecodormancy phase, from midwinter to budburst. We regularly sampled twigs of four different temperate deciduous tree species from January to the leaf-out date. Using computer-controlled freezers and climate chambers, the freezing resistance of buds was measured directly after sampling and also after the application of artificial hardening and dehardening treatments, simulating cold and warm spells...
October 2017: New Phytologist
https://www.readbyqxmd.com/read/28716407/overexpression-of-lsi1-in-cold-sensitive-rice-mediates-transcriptional-regulatory-networks-and-enhances-resistance-to-chilling-stress
#14
Changxun Fang, Pengli Zhang, Xin Jian, Weisi Chen, Hongmei Lin, Yingzhe Li, Wenxiong Lin
Frequent cold spells in late spring can damage early rice seedlings. However, overexpression of the silicon-uptake gene Lsi1 (Lsi1-OX) in cold-sensitive rice (Oryza sativa L., accession: Dular) notably enhances its chilling resistance. In this study, we found that continual chilling led to chlorophyll and RNA degradation in wild-type Dular leaves, whereas leaves from a Lsi1-OX line exhibited no obvious changes. A comparison of the global mRNA expression between the two rice lines showed that genes encoding photosynthesis-antenna proteins were downregulated and those encoding the proteasome were upregulated in the wild-type organism...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28630446/strong-sub-seasonal-wintertime-cooling-over-east-asia-and-northern-europe-associated-with-super-el-ni%C3%A3-o-events
#15
Xin Geng, Wenjun Zhang, Malte F Stuecker, Fei-Fei Jin
East Asia experienced a record-breaking cold event during the 2015/16 boreal winter, with pronounced impacts on livelihood in the region. We find that this large-scale cold spell can be attributed to the concurrent super El Niño event in the tropical Pacific. Our analysis reveals that all super El Niño winters (1982/83, 1997/98, and 2015/16) were accompanied by a rapid sub-seasonal North Atlantic Oscillation (NAO)/Arctic Oscillation (AO) phase reversal from a positive to a negative state during early January, which was largely caused by the interaction of these super El Niño events with the subtropical jet annual cycle...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28593715/can-animal-habitat-use-patterns-influence-their-vulnerability-to-extreme-climate-events-an-estuarine-sportfish-case-study
#16
Ross E Boucek, Michael R Heithaus, Rolando Santos, Philip Stevens, Jennifer S Rehage
Global climate forecasts predict changes in the frequency and intensity of extreme climate events (ECEs). The capacity for specific habitat patches within a landscape to modulate stressors from extreme climate events, and animal distribution throughout habitat matrices during events, could influence the degree of population level effects following the passage of ECEs. Here, we ask (i) does the intensity of stressors of an ECE vary across a landscape? And (ii) Do habitat use patterns of a mobile species influence their vulnerability to ECEs? Specifically, we measured how extreme cold spells might interact with temporal variability in habitat use to affect populations of a tropical, estuarine-dependent large-bodied fish Common Snook, within Everglades National Park estuaries (FL US)...
October 2017: Global Change Biology
https://www.readbyqxmd.com/read/28468072/-impact-of-daily-mean-temperature-cold-spells-and-heat-waves-on-stroke-mortality-a-multivariable-meta-analysis-from-12-counties-of-hubei-province-china
#17
Y Q Zhang, C H Yu, J Z Bao
Objective: To assess the acute effects of daily mean temperature, cold spells, and heat waves on stroke mortality in 12 counties across Hubei province, China. Methods: Data related to daily mortality from stroke and meteorology in 12 counties across Hubei province during 2009-2012, were gathered. Distributed lag nonlinear model (DLNM) was first used, to estimate the county-specific associations between daily mean temperature, cold spells, heat waves and stroke mortality. Multivariate Meta-analysis was then applied to pool the community-specific relationships between temperature and stroke mortality (exposure-response relationship) as well as both cold- and- heat-associated risks on mortality at different lag days (lag-response relationship)...
April 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28465307/the-impact-of-temperature-extremes-on-mortality-a-time-series-study-in-jinan-china
#18
Jing Han, Shouqin Liu, Jun Zhang, Lin Zhou, Qiaoling Fang, Ji Zhang, Ying Zhang
OBJECTIVE: To investigate the relationship between temperature extremes and daily number of deaths in Jinan, a temperate city in northern China. METHODS: Data ondaily number of deaths and meteorological variables over the period of 2011-2014 were collected. Cold spells or heat waves were defined as ≥3 consecutive days with mean temperature ≤5th percentile or ≥95th percentile, respectively. We applied a time-series adjusted Poisson regression to assess the effects of extreme temperature on deaths...
May 2, 2017: BMJ Open
https://www.readbyqxmd.com/read/28384570/effect-modification-of-individual-and-regional-scale-characteristics-on-heat-wave-related-mortality-rates-between-2009-and-2012-in-seoul-south-korea
#19
REVIEW
E-Jin Kim, Ho Kim
Many studies have investigated the associations between heat waves, ambient temperature, cold spells, and mortality or morbidity. Some studies have utilized effect modification to reveal the factors that increase an individual's susceptibility to temperature extremes, which can then be used to reshape public policy. In this study, we used a time-stratified case-crossover technique to examine how individual- and regional-scale characteristics modified heat wave-related impacts on mortality rates in Seoul, South Korea, between 2009 and 2012...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28376915/cold-spell-en-route-delays-spring-arrival-and-decreases-apparent-survival-in-a-long-distance-migratory-songbird
#20
Martins Briedis, Steffen Hahn, Peter Adamík
BACKGROUND: Adjusting the timing of annual events to gradual changes in environmental conditions is necessary for population viability. However, adaptations to weather extremes are poorly documented in migratory species. Due to their vast seasonal movements, long-distance migrants face unique challenges in responding to changes as they rely on an endogenous circannual rhythm to cue the timing of their migration. Furthermore, the exact mechanisms that explain how environmental factors shape the migration schedules of long-distance migrants are often unknown...
April 4, 2017: BMC Ecology
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